@article{kimiaei_kwon_meinander_osterberg_lavoine_venditti_2024, title={Biodegradation of Lignocellulose-Polyester Composite Films in Freshwater and Seawater Conditions}, volume={6}, ISSN={["1572-8919"]}, DOI={10.1007/s10924-024-03328-z}, journal={JOURNAL OF POLYMERS AND THE ENVIRONMENT}, author={Kimiaei, Erfan and Kwon, Soojin and Meinander, Kristoffer and Osterberg, Monika and Lavoine, Nathalie and Venditti, Richard}, year={2024}, month={Jun} } @article{hong_schnetzer_lavoine_lucia_eggleston_2024, title={Innovating Environmentally Sustainable Materials Platforms by Harnessing Coastal Marine Tunicates}, volume={11}, ISSN={["1864-564X"]}, url={https://doi.org/10.1002/cssc.202401024}, DOI={10.1002/cssc.202401024}, journal={CHEMSUSCHEM}, author={Hong, Shiyao and Schnetzer, Astrid and Lavoine, Nathalie and Lucia, Lucian and Eggleston, David B.}, year={2024}, month={Nov} } @inproceedings{co-production of a crystalline cellulose material and biofuels from crispr-edited biomass_2023, url={https://sim.confex.com/sim/sbfc2023/meetingapp.cgi/Paper/47090}, booktitle={45th Symposium on Biomaterials, Fuels and Chemicals}, year={2023}, month={Apr} } @article{chacon_lavoine_venditti_2023, title={Redesigning the appearance of recycled containers for packaging applications: The effect of paper waste physicochemical properties on the performance of paperboards with obvious recycled content}, volume={2}, ISSN={["1099-1522"]}, DOI={10.1002/pts.2717}, abstractNote={AbstractSignificant efforts have been made over the past decade to facilitate the recognition of environmentally friendly packaging and promote sustainability. Yet, consumers remain confused by the excess of labels and claims used to communicate sustainability. In our previous work, we modified the appearance of recycled fibre‐based packaging by incorporating visible particles of fibre‐based waste. This strategy enabled consumers to better identify packages with a high recyclability level, enhancing their environmental perception towards sustainable products. However, the incorporation of such large waste particles proved to be detrimental to the mechanical properties of the paperboards. In this study, we further investigate the influence of the physicochemical properties of the added fibre‐based waste on packaging performance. Using a similar strategy to enhance the environmental perception, we herein studied the effect of mixed office waste (MOW), old magazines (OMG), and polylactic acid (PLA) paper cups. The presence of hydrophobic and difficult‐to‐process and difficult‐to‐disperse waste, such as the PLA paper cups, significantly altered the mechanical performance of the paperboards, whereas more hydrophilic and easy‐to‐disintegrate waste (MOW and OMG) had a lesser effect regardless of the size of the particles. Strength agents such as cationic starch (CS) and cellulose microfibrils (CMFs) successfully restored the properties of the paperboards containing MOW and OMG but were less effective for PLA paper cups. A multi‐ply strategy overcame the limitations of CS and CMFs using the redesigned paperboard as an outer ply for aesthetic purposes and a 100% recycled inner ply for restoring strength.}, journal={PACKAGING TECHNOLOGY AND SCIENCE}, author={Chacon, Lisandra and Lavoine, Nathalie and Venditti, Richard A.}, year={2023}, month={Feb} } @article{wang_lavoine_salvi_2023, title={Cold atmospheric pressure plasma for the sanitation of conveyor belt materials: Decontamination efficacy against adherent bacteria and biofilms of Escherichia coli and effect on surface properties}, volume={84}, ISSN={["1878-5522"]}, DOI={10.1016/j.ifset.2022.103260}, abstractNote={The inactivation efficacy of a cold atmospheric pressure plasma jet against Escherichia coli DH5α adherent cells and biofilms on two conveyor belt materials was evaluated. A 120 s treatment time with a 3 cm treatment distance from the surface reduced both adherent cells (initial 5.6 ± 0.2 log CFU/coupon) and 24 h biofilms (initial 5.8 ± 0.4 log CFU/coupon) on stainless steel (SS) by >4.6 log CFU. While the same treatment reduced adherent cells (initial 5.7 ± 0.5 log CFU/coupon) and 24 h biofilms (initial 6.9 ± 0.5 log CFU/coupon) on polyvinyl chloride (PVC) by 3.8 ± 0.9 and 3.5 ± 0.5 log CFU, respectively. Mature biofilms (72 h grown) were more resistant than 24 h grown biofilms. Lower microbial reductions were observed on scratched surfaces compared to intact ones. No changes were observed in SS and PVC surfaces in terms of chemical properties and visual topography. CAPP is a promising waterless technique for the sanitation of metallic and polymeric conveyor belt surfaces. Cold atmospheric pressure plasma (CAPP) has the potential as waterless technology to inactivate bacteria and their biofilms on food contact surfaces without affecting the material properties and the visual topography. CAPP can be integrated for industrial operation by mounting a CAPP jet on a robotic arm or moving a conveyor belt under a stationary CAPP jet for surface sanitation. This environmental-friendly and residue-free nature technology can be useful in the food industry.}, journal={INNOVATIVE FOOD SCIENCE & EMERGING TECHNOLOGIES}, author={Wang, Qingyang and Lavoine, Nathalie and Salvi, Deepti}, year={2023}, month={Mar} } @article{trovagunta_kelley_lavoine_2022, title={Dual-Templating Approach for Engineering Strong, Biodegradable Lignin-Based Foams}, volume={11}, ISSN={["2168-0485"]}, url={https://doi.org/10.1021/acssuschemeng.2c04056}, DOI={10.1021/acssuschemeng.2c04056}, abstractNote={Technical lignins are generated as byproducts from the wood pulping industry. Although their estimated annual production amounts to approximately 70 million tons, their exploitation as value-added products remains insignificant. Yet, the diversity in the molecular structure and surface chemistry of technical lignins and their intrinsic role as mechanical support of plants may be an asset to consider in the engineering of plant-inspired materials such as biofoams. Valorization of lignins into solid foams, however, rarely accounts for more than 45–50 wt % of lignins because of their brittle nature. Herein, we report a strategy to develop fully biodegradable lignin-based foams of high stiffness, strength, and toughness that are comparable to, or in some cases exceed, the performance of petroleum-derived foams. A dual-templating approach using ice and cellulose nanofibrils (CNFs) as templates was selected to control the porous architecture of the foams made by the assembly of lignin and cellulose in the cell walls. Foams with varying lignin-to-CNF weight ratios showed enhanced structural and mechanical integrity compared with neat lignin and CNF foams. For 80–90 wt % of lignin, a significant increase (+50%) in the foams' compressive performance was observed. Varying the degree of sulfonation of lignin and in turn its chemical interaction with cellulose enabled the generation of biodegradable composite foams with tunable compressive strength. The greater the colloidal stability of the lignin-CNF suspension, the higher the foams' compressive performance. This study thus discusses an engineering approach for the valorization of technical lignins into sustainable foams that have potential as packaging materials and sandwich panels, in which high stiffness, strength, and toughness per unit weight are required.}, journal={ACS SUSTAINABLE CHEMISTRY & ENGINEERING}, publisher={American Chemical Society (ACS)}, author={Trovagunta, Ramakrishna and Kelley, Stephen S. and Lavoine, Nathalie}, year={2022}, month={Nov} } @article{van schoubroeck_chacon_reynolds_lavoine_hakovirta_gonzalez_van passel_venditti_2023, title={Environmental sustainability perception toward obvious recovered waste content in paper-based packaging: An online and in-person survey best-worst scaling experiment}, volume={188}, ISSN={["1879-0658"]}, url={https://doi.org/10.1016/j.resconrec.2022.106682}, DOI={10.1016/j.resconrec.2022.106682}, abstractNote={This study explores consumers' visual sustainability impressions of paper-based packaging that has incorporated obvious waste content. Two research questions were addressed concerning (i) the environmental sustainability perception of noticeable waste content in packaging and (ii) the impact of the presentation format (i.e., online versus in-person surveys) when studying these perceptions. Best-worst scaling experiments were conducted, which made respondents choose the 'most' and 'least' environmentally friendly package. Packages were designed using paperboard substrates blending either brown linerboard or white hardwood pulp with different recovered waste materials. The results showed that consumers perceive obvious waste-containing packaging as more environmentally friendly than classical packaging (with no visual waste). Samples with a brown base and agricultural waste were perceived as more sustainable compared to white packaging and the use of paper waste. In addition, the presentation format changed respondents' perception, and should therefore be carefully considered when designing surveys.}, journal={RESOURCES CONSERVATION AND RECYCLING}, author={Van Schoubroeck, Sophie and Chacon, Lisandra and Reynolds, Autumn M. and Lavoine, Nathalie and Hakovirta, Marko and Gonzalez, Ronalds and Van Passel, Steven and Venditti, Richard A.}, year={2023}, month={Jan} } @article{kalantari_lucia_lavoine_2022, title={Green synthesis, characterization, and catalytic application of a supported and magnetically isolable copper-iron oxide-sodium alginate}, volume={3}, ISSN={2666-5549}, url={http://dx.doi.org/10.1016/j.gresc.2022.04.005}, DOI={10.1016/j.gresc.2022.04.005}, abstractNote={Herein, we report a green and facile preparation and characterization procedure of copper nanoparticles stabilized on magnetically separable sodium alginate support (Cu NPs-Fe3O4-SAlg) using Silybum marianum seeds extract and investigate their catalytic reductive chemistry for reduction of environmental pollutants. Indeed, the phytochemical content of the plant extract are responsible to biosynthesis of copper (Cu) nanoparticles and their stabilization by functionalizing the surface of magnetic alginate. Characterization of the biocatalyst was undertaken with FT-IR, XPS, XRD and STEM equipped with EDS. A standard suite of model compounds on which the reductive chemistry was tested were 4-nitrophenol (4-NP), potassium hexacyanoferrate (K3[Fe(CN)6]), and a variety of organic dyes including Congo Red (CR). The as-synthesized Cu NPs-Fe3O4-SAlg catalyst was highly effective in reducing 4-NP to 4-aminophenol in water and in the presence of sodium borohydride as a reducing agent. Also, a high reduction performance was observed with CR and K3[Fe(CN)6] in presence of the Cu NPs-Fe3O4-SAlg catalyst. The catalyst acted within 190 and 35 ​s respectively, at room temperature in the presence of NaBH4. Thus, the Cu NPs-Fe3O4-SAlg catalyst is a highly efficient catalyst which is also reusable due to its magnetic nature. This work reports a green synthesis of a high-performance Cu NPs-Fe3O4-SAlg catalyst using an environmental friendly method for reduction of 4-NP, CR, and K3[Fe(CN)6] over a short time.}, number={2}, journal={Green Synthesis and Catalysis}, publisher={Elsevier BV}, author={Kalantari, Elmira and Lucia, Lucian and Lavoine, Nathalie}, year={2022}, month={May}, pages={179–184} } @article{chacon_lavoine_venditti_2022, title={Valorization of mixed office waste as macro-, micro-, and nano-sized particles in recycled paper containerboards for enhanced performance and improved environmental perception}, volume={180}, ISSN={["1879-0658"]}, DOI={10.1016/j.resconrec.2021.106125}, abstractNote={Recent surveys have shown that consumers do not know how to recognize sustainable packaging and are misled by the excessive usage of environmental clues by the packaging industry. A better approach to communicate sustainability is therefore needed to promote purchasing towards sustainable products. This study proposes to re-design recycled paper-based containers so that consumers easily recognize visually large contaminants in the paper influencing the consumer to refer to this product as recycled and perceive it as sustainable. To this end, the appearance of recycled containers from old corrugated containers (OCC) was intentionally altered with the addition of processed mixed office waste (MOW) of distinct average aspect ratio (AR) (length divided by width), namely 52 (macro-scale), 72 (micro-scale), and 163 (nano-scale), to produce recycled paperboards with visually noticeable recycled contents. The addition of MOW with the lowest AR resulted in visible particles on the surface of paperboards, evidencing the presence of recycled materials. The mechanical performance with this material, however, decreased. On the other hand, the addition of MOW with the highest AR improved the mechanical properties of the paperboards similar to the addition of nanocellulose but with less obvious cues of it having recycled content in the product. Thus, the combination of low and high AR contaminants is suggested to strategically engineer sustainable packaging with high performance and clear visual clues of recycled content and positive environmental perception.}, journal={RESOURCES CONSERVATION AND RECYCLING}, author={Chacon, Lisandra and Lavoine, Nathalie and Venditti, Richard A.}, year={2022}, month={May} } @article{trovagunta_kelley_lavoine_2021, title={Highlights on the mechanical pre-refining step in the production of wood cellulose nanofibrils}, volume={10}, ISSN={["1572-882X"]}, url={https://doi.org/10.1007/s10570-021-04226-6}, DOI={10.1007/s10570-021-04226-6}, number={18}, journal={CELLULOSE}, publisher={Springer Science and Business Media LLC}, author={Trovagunta, Ramakrishna and Kelley, Stephen S. and Lavoine, Nathalie}, year={2021}, month={Oct} } @misc{lamm_li_qian_wang_lavoine_newman_gardner_li_hu_ragauskas_et al._2021, title={Recent Advances in Functional Materials through Cellulose Nanofiber Templating}, volume={33}, ISSN={["1521-4095"]}, DOI={10.1002/adma.202005538}, abstractNote={AbstractAdvanced templating techniques have enabled delicate control of both nano‐ and microscale structures and have helped thrust functional materials into the forefront of society. Cellulose nanomaterials are derived from natural polymers and show promise as a templating source for advanced materials. Use of cellulose nanomaterials in templating combines nanoscale property control with sustainability, an attribute often lacking in other templating techniques. Use of cellulose nanofibers for templating has shown great promise in recent years, but previous reviews on cellulose nanomaterial templating techniques have not provided extensive analysis of cellulose nanofiber templating. Cellulose nanofibers display several unique properties, including mechanical strength, porosity, high water retention, high surface functionality, and an entangled fibrous network, all of which can dictate distinctive aspects in the final templated materials. Many applications exploit the unique aspects of templating with cellulose nanofibers that help control the final properties of the material, including, but not limited to, applications in catalysis, batteries, supercapacitors, electrodes, building materials, biomaterials, and membranes. A detailed analysis on the use of cellulose nanofibers templating is provided, addressing specifically how careful selection of templating mechanisms and methodologies, combined toward goal applications, can be used to directly benefit chosen applications in advanced functional materials.}, number={12}, journal={ADVANCED MATERIALS}, author={Lamm, Meghan E. and Li, Kai and Qian, Ji and Wang, Lu and Lavoine, Nathalie and Newman, Reagan and Gardner, Douglas J. and Li, Teng and Hu, Liangbing and Ragauskas, Arthur J. and et al.}, year={2021}, month={Mar} } @article{trovagunta_zou_österberg_kelley_lavoine_2021, title={Design strategies, properties and applications of cellulose nanomaterials-enhanced products with residual, technical or nanoscale lignin—A review}, volume={254}, url={https://doi.org/10.1016/j.carbpol.2020.117480}, DOI={10.1016/j.carbpol.2020.117480}, abstractNote={With the increasing demand for greener alternatives to fossil-derived products, research on cellulose nanomaterials (CNMs) has rapidly expanded. The combination of nanoscale properties and sustainable attributes makes CNMs an asset in the quest for a sustainable society. However, challenges such as the hydrophilic nature of CNMs, their low compatibility with non-polar matrices and modest thermal stability, slow the development of end-uses. Combination of CNMs with amphiphilic lignin can improve the thermal stability, enhance the compatibility with non-polar matrices and, additionally, endow CNMs with new functionalities e.g., UV shielding or antioxidative properties. This article comprehensively reviews the different design strategies and their influence on properties and applications of CNMs containing lignin in various forms; either as residual lignin, added technical lignin, or nanoscale particles. The review focuses especially on the synergy created between CNMs and lignin, paving the way for new production routes and use of CNM/lignin materials in high-performance applications.}, journal={Carbohydrate Polymers}, publisher={Elsevier BV}, author={Trovagunta, Ramakrishna and Zou, Tao and Österberg, Monica and Kelley, Stephen S. and Lavoine, Nathalie}, year={2021}, month={Feb}, pages={117480} } @article{apostolopoulou-kalkavoura_hu_lavoine_garg_linares_munier_zozoulenko_shiomi_bergstrom_2021, title={Humidity-Dependent Thermal Boundary Conductance Controls Heat Transport of Super-Insulating Nanofibrillar Foams}, volume={4}, ISSN={["2590-2385"]}, url={https://doi.org/10.1016/j.matt.2020.11.007}, DOI={10.1016/j.matt.2020.11.007}, abstractNote={Cellulose nanomaterial (CNM)-based foams and aerogels with thermal conductivities substantially below the value for air attract significant interest as super-insulating materials in energy-efficient green buildings. However, the moisture dependence of the thermal conductivity of hygroscopic CNM-based materials is poorly understood, and the importance of phonon scattering in nanofibrillar foams remains unexplored. Here, we show that the thermal conductivity perpendicular to the aligned nanofibrils in super-insulating ice-templated nanocellulose foams is lower for thinner fibrils and depends strongly on relative humidity (RH), with the lowest thermal conductivity (14 mW m−1 K−1) attained at 35% RH. Molecular simulations show that the thermal boundary conductance is reduced by the moisture-uptake-controlled increase of the fibril-fibril separation distance and increased by the replacement of air with water in the foam walls. Controlling the heat transport of hygroscopic super-insulating nanofibrillar foams by moisture uptake and release is of potential interest in packaging and building applications.}, number={1}, journal={MATTER}, publisher={Elsevier BV}, author={Apostolopoulou-Kalkavoura, Varvara and Hu, Shiqian and Lavoine, Nathalie and Garg, Mohit and Linares, Mathieu and Munier, Pierre and Zozoulenko, Igor and Shiomi, Junichiro and Bergstrom, Lennart}, year={2021}, month={Jan} } @article{tao_lavoine_jiang_tang_lin_2020, title={Reducing end modification on cellulose nanocrystals: strategy, characterization, applications and challenges}, url={https://doi.org/10.1039/D0NH00016G}, DOI={10.1039/D0NH00016G}, abstractNote={Decorating aldehyde groups on the reducing end of rod-like cellulose nanocrystals provides region-selective modification for expanding diverse applications.}, journal={Nanoscale Horizons}, publisher={Royal Society of Chemistry (RSC)}, author={Tao, Han and Lavoine, Nathalie and Jiang, Feng and Tang, Juntao and Lin, Ning}, year={2020} } @article{zhu_fu_lavoine_lucia_2020, title={Structural reconstruction strategies for the design of cellulose nanomaterials and aligned wood cellulose-based functional materials – A review}, volume={247}, ISSN={0144-8617}, url={http://dx.doi.org/10.1016/j.carbpol.2020.116722}, DOI={10.1016/j.carbpol.2020.116722}, abstractNote={Cellulose is the world's most abundant natural polymer that displays highly desirable characteristics such as biodegradability and sustainability. Its derivatives and associated structured functional materials have potential in various fields such as surface engineering, energy and storage, water treatment, flexible electronics, construction, physical protection, and optical components. All of these applications demand nanocellulose-based micro/nano structural reconstruction for high performance. Recently, functional materials based on aligned nanocellulose in wood obtained through a top-down strategy have highlighted the importance of structure reconstruction strategies on functional designs. In this review, various cellulose or wood micro/nano materials designed by structure reconstruction were examined to highlight the importance of structure reconstruction strategies for various functionalities.}, journal={Carbohydrate Polymers}, publisher={Elsevier BV}, author={Zhu, Zhaodong and Fu, Shiyu and Lavoine, Nathalie and Lucia, Lucian A.}, year={2020}, month={Nov}, pages={116722} } @article{lavoine_durmaz_trovagunta_2019, title={Preparation and Properties of Nanopolysaccharides}, volume={15}, ISBN={["978-981-15-0912-4"]}, ISSN={["2195-0652"]}, url={http://dx.doi.org/10.1007/978-981-15-0913-1_1}, DOI={10.1007/978-981-15-0913-1_1}, abstractNote={With the raising environmental awareness of the society, the interest in exploiting nanomaterials from renewable resources is rapidly increasing. Renewable nanotechnology not only features the outstanding properties of common synthetic nanomaterials, but also combines renewability, biodegradability and biocompatibility. These past two decades have seen the emergence of so-called nanopolysaccharides, namely nanoscale particles isolated and/or produced from renewable and abundant materials such as cellulose, chitin and starch. These particles are paving the way for the design of high-performance tailored materials, which can address the current environmental and sustainability concerns of our society. Their potential in replacing plastics from petroleum-based polymers is especially the key driver behind this global and raising research effort. This chapter introduces the different preparation routes and main properties of nanopolysaccharides from cellulose, chitin and starch; three of the most abundant biopolymers available and exploited today. This chapter suggests as well potential applications and usages for these nanoparticles, as a preamble of the following next chapters, which will illustrate much more in details how these nanoparticles can change our society of tomorrow.}, journal={ADVANCED FUNCTIONAL MATERIALS FROM NANOPOLYSACCHARIDES}, publisher={Springer Singapore}, author={Lavoine, Nathalie and Durmaz, Ekrem and Trovagunta, Ramakrishna}, year={2019}, pages={1–54} } @article{kriechbaum_munier_apostolopoulou-kalkavoura_lavoine_2018, title={Analysis of the Porous Architecture and Properties of Anisotropic Nanocellulose Foams: A Novel Approach to Assess the Quality of Cellulose Nanofibrils (CNFs)}, volume={6}, ISSN={2168-0485 2168-0485}, url={http://dx.doi.org/10.1021/acssuschemeng.8b02278}, DOI={10.1021/acssuschemeng.8b02278}, abstractNote={Cellulose nanofibrils (CNFs) are a unique nanomaterial because of their abundant, renewable, and biocompatible origin. Compared with synthetic nanoparticles, CNFs are commonly produced from cellulo...}, number={9}, journal={ACS Sustainable Chemistry & Engineering}, publisher={American Chemical Society (ACS)}, author={Kriechbaum, Konstantin and Munier, Pierre and Apostolopoulou-Kalkavoura, Varvara and Lavoine, Nathalie}, year={2018}, month={Jul}, pages={11959–11967} } @article{gordeyeva_voisin_hedin_bergström_lavoine_2018, title={Lightweight foams of amine-rich organosilica and cellulose nanofibrils by foaming and controlled condensation of aminosilane}, volume={2}, ISSN={2052-1537}, url={http://dx.doi.org/10.1039/c8qm00360b}, DOI={10.1039/c8qm00360b}, abstractNote={Preparation of stable and lightweight hybrid foams from cellulose nanofibrils (TCNFs) and amine-rich organosilane (AS) by controlled sol–gel chemistry of the AS.}, number={12}, journal={Materials Chemistry Frontiers}, publisher={Royal Society of Chemistry (RSC)}, author={Gordeyeva, Korneliya and Voisin, Hugo and Hedin, Niklas and Bergström, Lennart and Lavoine, Nathalie}, year={2018}, pages={2220–2229} } @article{lavoine_bergström_2017, title={Nanocellulose-based foams and aerogels: processing, properties, and applications}, volume={5}, ISSN={2050-7488 2050-7496}, url={http://dx.doi.org/10.1039/C7TA02807E}, DOI={10.1039/C7TA02807E}, abstractNote={This review summarizes the main processing routes and significant properties of nanocellulose-based foams and aerogels.}, number={31}, journal={Journal of Materials Chemistry A}, publisher={Royal Society of Chemistry (RSC)}, author={Lavoine, Nathalie and Bergström, Lennart}, year={2017}, pages={16105–16117} } @article{lavoine_bras_saito_isogai_2017, title={Optimization of preparation of thermally stable cellulose nanofibrils via heat‐induced conversion of ionic bonds to amide bonds}, volume={55}, ISSN={0887-624X 1099-0518}, url={http://dx.doi.org/10.1002/pola.28541}, DOI={10.1002/pola.28541}, abstractNote={ABSTRACTImproving the thermal stability of nanocelluloses is important for practical applications such as melt compounded nanocellulose‐reinforced polymer composites and flexible substrates for nanocellulose‐containing electronic devices. Here, we report optimum conditions for a straightforward surface modification strategy for improving the thermal stability of 2,2,6,6‐tetramethypiperidine‐1‐oxyl (TEMPO)‐oxidized cellulose nanofibrils (TOCNs); the heat‐induced conversion of TOCN alkyl ammonium carboxylates to amides. Different amine‐terminated compounds (R‐NH2) were grafted onto the surface of TOCNs under aqueous conditions. The influences of R‐NH2 molecular weight, R‐NH2/TOCN‐COOH molar ratio, and thermal stability of R‐NH2 on the properties of the grafted TOCN films were investigated through infrared spectroscopy and thermogravimetric analysis. For maximum thermal improvement of up to 90 °C, complete ionic bonding of TOCN carboxy groups with R‐NH2 was required, as well as proper selection of the R‐NH2 compound. A controlled heating process was also needed to achieve effective ionic‐to‐amide bond conversion. © 2017 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2017, 55, 1750–1756}, number={10}, journal={Journal of Polymer Science Part A: Polymer Chemistry}, publisher={Wiley}, author={Lavoine, Nathalie and Bras, Julien and Saito, Tsuguyuki and Isogai, Akira}, year={2017}, month={Mar}, pages={1750–1756} } @article{apostolopoulou-kalkavoura_gordeyeva_lavoine_bergström_2017, title={Thermal conductivity of hygroscopic foams based on cellulose nanofibrils and a nonionic polyoxamer}, volume={25}, ISSN={0969-0239 1572-882X}, url={http://dx.doi.org/10.1007/s10570-017-1633-y}, DOI={10.1007/s10570-017-1633-y}, abstractNote={Nanocellulose-based lightweight foams are promising alternatives to fossil-based insulation materials for energy-efficient buildings. The properties of cellulose-based materials are strongly influenced by moisture and there is a need to assess and better understand how the thermal conductivity of nanocellulose-based foams depends on the relative humidity and temperature. Here, we report a customized setup for measuring the thermal conductivity of hydrophilic materials under controlled temperature and relative humidity conditions. The thermal conductivity of isotropic foams based on cellulose nanofibrils and a nonionic polyoxamer, and an expanded polystyrene foam was measured over a wide range of temperatures and relative humidity. We show that a previously developed model is unable to capture the strong relative humidity dependence of the thermal conductivity of the hygroscopic, low-density nanocellulose- and nonionic polyoxamer-based foam. Analysis of the moisture uptake and moisture transport was used to develop an empirical model that takes into consideration the moisture content and the wet density of the investigated foam. The new empirical model could predict the thermal conductivity of a foam with a similar composition but almost 3 times higher density. Accurate measurements of the thermal conductivity at controlled temperature and relative humidity and availability of simple models to better predict the thermal conductivity of hygroscopic, low-density foams are necessary for the development of nanocellulose-based insulation materials.}, number={2}, journal={Cellulose}, publisher={Springer Science and Business Media LLC}, author={Apostolopoulou-Kalkavoura, Varvara and Gordeyeva, Korneliya and Lavoine, Nathalie and Bergström, Lennart}, year={2017}, month={Dec}, pages={1117–1126} } @article{lichtenstein_lavoine_2017, title={Toward a deeper understanding of the thermal degradation mechanism of nanocellulose}, volume={146}, url={https://doi.org/10.1016/j.polymdegradstab.2017.09.018}, DOI={10.1016/j.polymdegradstab.2017.09.018}, abstractNote={Understanding the thermal degradation process of cellulose-nanofibers (CNF) is necessary for developing high-value added CNF-based materials with e.g. fire retardant properties or high thermal stability. This study compares the thermal degradation behavior of softwood pulp before and after TEMPO-mediated oxidation, and that of the respective CNF and TEMPO-oxidized CNF with either sodium carboxylate (T–CNF COONa) or carboxylic acid surface groups (T–CNF COOH). The cellulose materials were charred under slow pyrolysis (i.e. at 4 °C min−1) from 50 °C to 600 °C using a thermogravimetric analyzer (TGA). The TGA was coupled to a mass spectrometer (MS) to analyze the volatile products evaporated during the heating process. The chemical structure and composition of the resulting chars after heating at different temperatures were assessed by infrared spectroscopy and X–ray diffraction. Fibrillation of the unmodified pulp resulted in a decrease in thermal stability of the obtained CNF, whereas TEMPO-oxidized pulp and T–CNF showed similar thermal behavior. Compared with the starting cellulose pulp, TEMPO-oxidized materials showed a reduced thermal stability. The presence of either sodium carboxylate or carboxylic acid groups influenced in particular the process of thermal degradation of the CNF. While COOH groups enhanced by 14% the thermal stability of CNF, COONa groups promoted the char formation by 27%. Tuning the counterion of T–CNF proved to be a straightforward approach for tailoring the thermal degradation behavior of the materials. The combinations of TG–MS, IR, and XRD finally resulted in the proposal of a degradation pathway for each investigated material.}, journal={Polymer Degradation and Stability}, publisher={Elsevier BV}, author={Lichtenstein, Karin and Lavoine, Nathalie}, year={2017}, month={Dec}, pages={53–60} } @article{lavoine_guillard_desloges_gontard_bras_2016, title={Active bio-based food-packaging: Diffusion and release of active substances through and from cellulose nanofiber coating toward food-packaging design}, volume={149}, ISSN={0144-8617}, url={http://dx.doi.org/10.1016/j.carbpol.2016.04.048}, DOI={10.1016/j.carbpol.2016.04.048}, abstractNote={Cellulose nanofibers (CNFs) were recently investigated for the elaboration of new functional food-packaging materials. Their nanoporous network was especially of interest for controlling the release of active species. Qualitative release studies were conducted, but quantification of the diffusion phenomenon observed when the active species are released from and through CNF coating has not yet been studied. Therefore, this work aims to model CNF-coated paper substrates as controlled release system for food-packaging using release data obtained for two model molecules, namely caffeine and chlorhexidine digluconate. The applied mathematical model - derived from Fickian diffusion - was validated for caffeine only. When the active species chemically interacts with the release device, another model is required as a non-predominantly diffusion-controlled release was observed. From caffeine modeling data, a theoretical active food-packaging material was designed. The use of CNFs as barrier coating was proved to be the ideal material configuration that best meets specifications.}, journal={Carbohydrate Polymers}, publisher={Elsevier BV}, author={Lavoine, Nathalie and Guillard, Valérie and Desloges, Isabelle and Gontard, Nathalie and Bras, Julien}, year={2016}, month={Sep}, pages={40–50} } @inbook{lavoine_bras_2016, place={New York, USA}, title={Active bio-based packaging: Toward nanofibrillated cellulose application}, booktitle={Nanocellulose, Cellulose Nanofibers and Cellulose Nanocomposites: Synthesis and Applications}, publisher={Nova Science Publishers, Inc}, author={Lavoine, Nathalie and Bras, Julien}, editor={Ibrahim, Md and Mondal, H.Editors}, year={2016}, pages={233–276} } @article{lavoine_bras_saito_isogai_2016, title={Improvement of the Thermal Stability of TEMPO-Oxidized Cellulose Nanofibrils by Heat-Induced Conversion of Ionic Bonds to Amide Bonds}, volume={37}, ISSN={1022-1336}, url={http://dx.doi.org/10.1002/marc.201600186}, DOI={10.1002/marc.201600186}, abstractNote={Improving thermal stability of TEMPO‐oxidized cellulose nanofibrils (TOCNs) is a major challenge for the development and preparation of new nanocomposites. However, thermal degradation of TOCNs occurs at 220 °C. The present study reports a simple way to improve thermal stability of TOCNs by the heat‐induced conversion of ionic bonds to amide bonds. Coupling amine‐terminated polyethylene glycol to the TOCNs is performed through ionic bond formation. Films are produced from the dispersions by the casting method. Infrared spectroscopy and thermogravimetric analysis confirm conversion of ionic bonds to amide bonds for the modified TOCN samples after heating. As a result, improvement of TOCNs' thermal stability by up to 90 °C is successfully achieved. image}, number={13}, journal={Macromolecular Rapid Communications}, publisher={Wiley}, author={Lavoine, Nathalie and Bras, Julien and Saito, Tsuguyuki and Isogai, Akira}, year={2016}, month={May}, pages={1033–1039} } @article{saini_quinot_lavoine_belgacem_bras_2016, title={β-Cyclodextrin-grafted TEMPO-oxidized cellulose nanofibers for sustained release of essential oil}, volume={52}, ISSN={0022-2461 1573-4803}, url={http://dx.doi.org/10.1007/s10853-016-0644-7}, DOI={10.1007/s10853-016-0644-7}, number={7}, journal={Journal of Materials Science}, publisher={Springer Science and Business Media LLC}, author={Saini, Seema and Quinot, Deborah and Lavoine, Nathalie and Belgacem, Mohamed Naceur and Bras, Julien}, year={2016}, month={Dec}, pages={3849–3861} } @article{lavoine_desloges_manship_bras_2015, title={Antibacterial paperboard packaging using microfibrillated cellulose}, volume={52}, ISSN={0022-1155 0975-8402}, url={http://dx.doi.org/10.1007/s13197-014-1675-1}, DOI={10.1007/s13197-014-1675-1}, abstractNote={The industry and consumers are focusing more and more on the development of biodegradable and lightweight food-packaging materials, which could better preserve the quality of the food and improve its shelf-life. In an attempt to meet these requirements, this study presents a novel bio-substrate able to contain active bio-molecules for future food-packaging applications. Based on a paperboard substrate, the development of an antibacterial bio-packaging material is, therein, achieved using a chlorhexidine digluconate (CHX) solution as a model of an antibacterial molecule, mixed with microfibrillated cellulose (MFC) and used as coating onto paperboard samples. AFM and FE-SEM analyses were performed to underline the nanoporous MFC network able to trap and to progressively release the CHX molecules. The release study of CHX was conducted in an aqueous medium and showed a lower proportion (20 %) of CHX released when using MFC. This led to the constant release of low amounts of CHX over 40 h. Antibacterial tests were carried out to assess the preservation of the antibacterial activity of the samples after the release studies. Samples remained active against Bacillus subtilis, with better results being obtained when MFC was used. The preservation of the quality of a model food was finally evaluated paving the way for future promising applications in the food packaging industry.}, number={9}, journal={Journal of Food Science and Technology}, publisher={Springer Science and Business Media LLC}, author={Lavoine, Nathalie and Desloges, Isabelle and Manship, Brigitte and Bras, Julien}, year={2015}, month={Jan}, pages={5590–5600} } @article{lavoine_guillard_desloges_gontard_bras_2015, title={Modeling of caffeine release from a cellulosic substrate coated with microfibrillated cellulose.}, volume={213}, url={http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=ORCID&SrcApp=OrcidOrg&DestLinkType=FullRecord&DestApp=MEDLINE&KeyUT=MEDLINE:27005240&KeyUID=MEDLINE:27005240}, DOI={10.1016/j.jconrel.2015.05.139}, abstractNote={Layered double hydroxides (LDH) are anion exchangers and have been investigated intensively as adsorbents for removal of hazardous and toxic anionic substances in water treatment. However, LDH, which are usually synthesized in the form of a powder, are often difficult to separate from suspensions in water treatment. Incorporating LDH into composite hydrogels is a strategy to avoid this difficulty: in this study, aqueous suspensions of Cl-containing LDH of high and low crystallinity were mixed with agarose solution while heating, and the mixtures were allowed to cool to form gels. However, in wet conditions, LDH would be susceptible to carbonate contamination from atmospheric CO2. In this context, LDH–agarose composite hydrogels were synthesized, and gels dried in three different ways (air drying, oven drying in air at 110 °C, and vacuum drying) were evaluated as anion adsorbents by using SO42 −. The air-dried gels showed significant reductions in SO42 − adsorption abilities compared to those of the original undried gels: 56% reduction for air-dried gels containing the low-crystallinity LDH and 29% reduction for air-dried gels containing the high-crystallinity LDH. This result shows that carbonate contamination was extremely serious for low-crystallinity LDH in the gel. In contrast, the oven- and vacuum-dried gels retained adsorption abilities that were almost the same as those of the original undried gels, regardless of crystallinity of LDH in the gels. Powdery form of LDH showed similar results about drying. These results show how important the drying methods are, and provide fundamental information about carbonate contamination.}, journal={Journal of controlled release : official journal of the Controlled Release Society}, author={Lavoine, Nathalie and Guillard, Valerie and Desloges, Isabelle and Gontard, Nathalie and Bras, Julien}, year={2015}, pages={e83–4} } @article{lavoine_desloges_sillard_bras_2014, title={Controlled release and long-term antibacterial activity of chlorhexidine digluconate through the nanoporous network of microfibrillated cellulose}, volume={21}, ISSN={0969-0239 1572-882X}, url={http://dx.doi.org/10.1007/s10570-014-0392-2}, DOI={10.1007/s10570-014-0392-2}, number={6}, journal={Cellulose}, publisher={Springer Science and Business Media LLC}, author={Lavoine, Nathalie and Desloges, Isabelle and Sillard, Cécile and Bras, Julien}, year={2014}, month={Oct}, pages={4429–4442} } @article{lavoine_tabary_desloges_martel_bras_2014, title={Controlled release of chlorhexidine digluconate using β-cyclodextrin and microfibrillated cellulose}, volume={121}, ISSN={0927-7765}, url={http://dx.doi.org/10.1016/j.colsurfb.2014.06.021}, DOI={10.1016/j.colsurfb.2014.06.021}, abstractNote={This study aims to develop a high-performance delivery system using microfibrillated cellulose (MFC)-coated papers as a controlled release system combined with the well-known drug delivery agent, β-cyclodextrin (βCD). Chlorhexidine digluconate (CHX), an antibacterial molecule, was mixed with a suspension of MFC or a βCD solution or mixed with both the substances, before coating onto a cellulosic substrate. The intermittent diffusion of CHX (i.e., diffusion interrupted by the renewal of the release medium periodically) was conducted in an aqueous medium, and the release mechanism of CHX was elucidated by field emission gun-scanning electron microscopy, SEM, NMR, and Fourier transform infrared analyses. According to the literature, both βCD and MFC are efficient controlled delivery systems. This study indicated that βCD releases CHX more gradually and over a longer period of time compared to MFC, which is mainly due to the ability of βCD to form an inclusion complex with CHX. Furthermore from the release study, a complementary action when the two compounds were combined was deduced. MFC mainly affected the burst effect, while βCD primarily controlled the amount of CHX released over time. In this paper, two different types of controlled release systems are proposed and compared. Depending on the final application, the use of βCD alone would release low amounts of active molecules over time (slow delivery), whereas the combination of β-cyclodextrin and MFC would be more suitable for the release of higher amounts of active molecules over time (rapid delivery).}, journal={Colloids and Surfaces B: Biointerfaces}, publisher={Elsevier BV}, author={Lavoine, Nathalie and Tabary, Nicolas and Desloges, Isabelle and Martel, Bernard and Bras, Julien}, year={2014}, month={Sep}, pages={196–205} } @article{lavoine_givord_tabary_desloges_martel_bras_2014, title={Elaboration of a new antibacterial bio-nano-material for food-packaging by synergistic action of cyclodextrin and microfibrillated cellulose}, volume={26}, ISSN={1466-8564}, url={http://dx.doi.org/10.1016/j.ifset.2014.06.006}, DOI={10.1016/j.ifset.2014.06.006}, abstractNote={A new sustained release paper-based packaging with antibacterial property was developed using the synergistic action between beta-cyclodextrin (βCD) and microfibrillated cellulose (MFC). Carvacrol, an antibacterial molecule, was included in βCD, previously grafted onto paper substrates, by impregnation. The MFC suspension was coated on the ensued substrate surface using a bar-coating process. Properties such as the Young modulus, zero-span breaking length or air permeability were characterized. Two release studies were conducted in deionized water and agar. Antibacterial tests were carried out in parallel. The mechanical properties were drastically damaged by the grafting process, whereas the barrier properties were maintained or even improved due to the MFC coating. The βCD-grafted samples allowed the gradual release of carvacrol 21 h later and with a release kinetic 24% slower in water. In agar, the association of βCD and MFC was emphasized. The samples were antibacterial for 14 h with βCD, and the addition of MFC still enhanced this period of time. A synergy between βCD and MFC was observed, paving the way for future promising development of sustained release packaging. Packaging is a substantial part of our everyday life and the use of packaging materials has shown a continuous increase over time. Today, the packaging industry relies strongly on the use of petroleum-derived plastic materials, whereas it is raising both environmental and economic concerns. Besides, even in industrialized countries, food-poisoning cases still persist. As a result, the society's requirements as for the development of food-packaging materials are evolving. The use of biodegradable, bio-based food-packaging materials able to preserve and ensure the shelf-life of food is required. In response to these requirements this study proposes a new bio-based food-packaging material able to preserve better and prolong the shelf-life of food by the sustained release of antibacterial molecules.}, journal={Innovative Food Science & Emerging Technologies}, publisher={Elsevier BV}, author={Lavoine, Nathalie and Givord, Clara and Tabary, Nicolas and Desloges, Isabelle and Martel, Bernard and Bras, Julien}, year={2014}, month={Dec}, pages={330–340} } @article{lavoine_desloges_khelifi_bras_2014, title={Impact of different coating processes of microfibrillated cellulose on the mechanical and barrier properties of paper}, volume={49}, ISSN={0022-2461 1573-4803}, url={http://dx.doi.org/10.1007/s10853-013-7995-0}, DOI={10.1007/s10853-013-7995-0}, number={7}, journal={Journal of Materials Science}, publisher={Springer Science and Business Media LLC}, author={Lavoine, Nathalie and Desloges, Isabelle and Khelifi, Bertine and Bras, Julien}, year={2014}, month={Jan}, pages={2879–2893} } @article{lavoine_desloges_bras_2014, title={Microfibrillated cellulose coatings as new release systems for active packaging}, volume={103}, ISSN={0144-8617}, url={http://dx.doi.org/10.1016/j.carbpol.2013.12.035}, DOI={10.1016/j.carbpol.2013.12.035}, abstractNote={In this work, a new use of microfibrillated cellulose (MFC) is highlighted for high-added-value applications. For the first time, a nanoporous network formed by MFC coated on paper is used for a controlled release of molecules. The release study was carried out in water with caffeine as a model molecule. The release process was studied by means of (i) continuous, and (ii) intermittent diffusion experiments (with renewal of the medium every 10 min). The effect of the MFC was first observed for the samples impregnated in the caffeine solution. These samples, coated with MFC (coat weight of about 7 g/m(2)), released the caffeine over a longer period (29 washings compared with 16), even if the continuous diffusions were similar for both samples (without and with MFC coating). The slowest release of caffeine was observed for samples coated with the mixture (MFC+caffeine). Moreover, the caffeine was only fully released 9h after the release from the other samples was completed. This study compared two techniques for the introduction of model molecules in MFC-coated papers. The latter offers a more controlled and gradual release. This new approach creates many opportunities especially in the food-packaging field. A similar study could be carried out with an active species.}, journal={Carbohydrate Polymers}, publisher={Elsevier BV}, author={Lavoine, Nathalie and Desloges, Isabelle and Bras, Julien}, year={2014}, month={Mar}, pages={528–537} } @phdthesis{lavoine_2013, place={Grenoble}, title={Design, Processing, and Characterization of innovative functional bio-nano-materials for packaging}, school={Grenoble Institute of Technology, Laboratory of Paper Science}, author={Lavoine, Nathalie}, year={2013} } @article{lavoine_bras_desloges_2013, title={Mechanical and barrier properties of cardboard and 3D packaging coated with microfibrillated cellulose}, volume={131}, ISSN={0021-8995}, url={http://dx.doi.org/10.1002/app.40106}, DOI={10.1002/app.40106}, abstractNote={ABSTRACTMicrofibrillated cellulose (MFC) is increasingly used with cellulosic substrates and especially with paper materials. Its use with cardboard remains not reported and the study of mechanical and barrier properties of MFC‐coated cardboard has been investigated in this article. The influence of coating process as well as the effect of MFC have been highlighted by comparing different MFC‐coated cardboard samples with PE‐coated cardboard samples. MFC was coated using bar coating process. Their distribution and homogeneity onto cardboard was observed using techniques such as SEM and FE‐SEM. Tests such as oxygen and air permeability, bending stiffness, and compressive strength have been carried out. The coating process used impacts significantly cardboard properties by two opposite ways: on one hand it damages the structure cohesion of cardboard decreasing its compressive strength; on the other hand it increases its bending stiffness by increasing considerably the samples thickness. The addition of MFC counterbalances the negative effects of the coating process: bending stiffness and compressive strength are indeed improved by 30% in machine direction. On the contrary, MFC does not enhance much cardboard barrier properties, although it considerably increases their water absorption. Within a framework of packaging application, MFC will rather have consequent effects on cardboard's properties as blend or as part of the multilayer structure. Other applications have to be considered for its use as top layer. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 40106.}, number={8}, journal={Journal of Applied Polymer Science}, publisher={Wiley}, author={Lavoine, Nathalie and Bras, Julien and Desloges, Isabelle}, year={2013}, month={Nov} } @article{lavoine_desloges_bras_2013, title={Microfibrillated cellulose: A nanoporous network for a controlled release of antimicrobial molecule}, volume={245}, url={http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=ORCID&SrcApp=OrcidOrg&DestLinkType=FullRecord&DestApp=WOS_CPL&KeyUT=WOS:000323851301698&KeyUID=WOS:000323851301698}, journal={Abstracts of Papers of the American Chemical Society}, author={Lavoine, Nathalie and Desloges, Isabelle and Bras, Julien}, year={2013} } @article{lavoine_desloges_bras_2012, title={Caffeine release study in a microfibrillated cellulose nanoporous structure}, volume={243}, url={http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=ORCID&SrcApp=OrcidOrg&DestLinkType=FullRecord&DestApp=WOS_CPL&KeyUT=WOS:000324475101408&KeyUID=WOS:000324475101408}, journal={Abstracts of Papers of the American Chemical Society}, author={Lavoine, Nathalie and Desloges, Isabelle and Bras, Julien}, year={2012} } @article{lavoine_desloges_dufresne_bras_2012, title={Microfibrillated cellulose – Its barrier properties and applications in cellulosic materials: A review}, volume={90}, ISSN={0144-8617}, url={http://dx.doi.org/10.1016/j.carbpol.2012.05.026}, DOI={10.1016/j.carbpol.2012.05.026}, abstractNote={Interest in microfibrillated cellulose (MFC) has been increasing exponentially. During the last decade, this bio-based nanomaterial was essentially used in nanocomposites for its reinforcement property. Its nano-scale dimensions and its ability to form a strong entangled nanoporous network, however, have encouraged the emergence of new high-value applications. In previous years, its mode of production has completely changed, as many forms of optimization have been developed. New sources, new mechanical processes, and new pre- and post-treatments are currently under development to reduce the high energy consumption and produce new types of MFC materials on an industrial scale. The nanoscale characterization possibilities of different MFC materials are thus increasing intensively. Therefore, it is critical to review such MFC materials and their properties. Moreover, very recent studies have proved the significant barrier properties of MFC. Hence, it is proposed to focus on the barrier properties of MFC used in films, in nanocomposites, or in paper coating.}, number={2}, journal={Carbohydrate Polymers}, publisher={Elsevier BV}, author={Lavoine, Nathalie and Desloges, Isabelle and Dufresne, Alain and Bras, Julien}, year={2012}, month={Oct}, pages={735–764} }