@article{gawish_ramadan_matthews_bourham_2008, title={Modification of PA6,6 by atmospheric plasma and grafting 2-hydroxy ethyl methacrylate (HEMA) to improve fabric properties}, volume={47}, ISSN={["1525-6111"]}, DOI={10.1080/03602550801951880}, abstractNote={Oxidative atmospheric pressure plasma was used to modify PA6,6 fabrics followed by graft copolymerization of 2-hydroxy ethyl methacrylate (HEMA) in 20% aqueous solution at 60°C for 1 h, with the aim to increase hydrophilicity, antistatic, and dyeing properties of the fabrics. Grafted PA6,6 fabrics were characterized by Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), and scanning electron microscopy (SEM). The modified PA6,6 fabrics improved the moisture regain and the antistatic properties. Dyeing property of grafted fabrics was also studied.}, number={5}, journal={POLYMER-PLASTICS TECHNOLOGY AND ENGINEERING}, author={Gawish, S. M. and Ramadan, A. M. and Matthews, S. R. and Bourham, M. A.}, year={2008}, pages={473–478} }
 @article{gawish_matthews_wafa_breidt_bourham_2007, title={Atmospheric plasma-aided biocidal finishes for nonwoven polypropylene fabrics. I. Synthesis and characterization}, volume={103}, ISSN={["1097-4628"]}, DOI={10.1002/app.24021}, abstractNote={Novel biocidal fabrics were synthesized by the graft copolymerization of glycidyl methacrylate (GMA) onto plasma-treated nonwoven polypropylene (PP) to produce PP/GMA grafts. Atmospheric oxygenated helium plasma was used to enhance the PP fabrics' initiation before GMA grafting. The grafted PP/GMA epoxide group was reacted with β-cyclodextrin, monochlorotrizynyl-β-cyclodextrins, or a quaternary ammonium chitosan derivative [N-(2 hydroxy propyl) 3-trimethylammonium chitosan chloride]. Some interesting biocidal agents were complexed into the cyclodextrin (CD) cavity of PP/GMA/CD grafted fabrics. Fourier transform infrared spectroscopy, thermogravimetric analysis, differential scanning calorimetry, and optical and scanning electron microscopies were used to characterize the grafted complexed fabrics. These synthesized biocidal fabrics proved to be antistatic, antimicrobial, and insect-repelling (see part II of this study). © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 103: 1900–1910, 2007}, number={3}, journal={JOURNAL OF APPLIED POLYMER SCIENCE}, author={Gawish, S. M. and Matthews, S. R. and Wafa, D. M. and Breidt, F. and Bourham, M. A.}, year={2007}, month={Feb}, pages={1900–1910} }
 @article{wafa_breidt_gawish_matthews_donohue_roe_bourham_2007, title={Atmospheric plasma-aided biocidal finishes for nonwoven polypropylene fabrics. II. Functionality of synthesized fabrics}, volume={103}, ISSN={["1097-4628"]}, DOI={10.1002/app.24042}, abstractNote={Atmospheric plasma-aided graft copolymerization of textile materials provides single or multiple functionality polypropylene (PP) modified fabrics. Biocidal PP's are modified ones to kill or inhibit the growth of microorganisms such as bacteria, molds, and fungi, and insect and tick repelling action. Novel PP biocidal fabrics synthesized by graft copolymerization using plasma-aided technique (see part I of this study) using antibacterial and insect repellent agents have been tested and evaluated and proved to be antimicrobial, tick repellent, and antistatic. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 103: 1911–1917, 2007}, number={3}, journal={JOURNAL OF APPLIED POLYMER SCIENCE}, author={Wafa, D. M. and Breidt, F. and Gawish, S. M. and Matthews, S. R. and Donohue, K. V. and Roe, R. M. and Bourham, M. A.}, year={2007}, month={Feb}, pages={1911–1917} }
 @article{gawish_ramadan_cornelius_bourham_matthews_mccord_wafa_breidt_2007, title={New functionalities of PA6,6 fabric modified by atmospheric pressure plasma and grafted glycidyl methacrylate derivatives}, volume={77}, ISSN={["1746-7748"]}, DOI={10.1177/0040517507076747}, abstractNote={Oxidative atmospheric pressure plasma was utilized to activate surface of PA 6,6 fabrics followed by graft copolymerization of glycidyl methacrylate (GMA) and further reacted with triethylene tetramine (TETA), quaternary ammonium chitosan (HTCC) or β-cyclodextrin (β-CD). The inner CD cavity was complexed with some insecticidal perfumes. Modified PA6,6 fabrics were analyzed by differential scanning calorimetry, thermogravimetric analysis, Fourier transform infrared spectroscopy and scanning electron microscopy. Antimicrobial activity and insect repelling assay were conducted and showed efficient antimicrobial and insect repelling properties.}, number={2}, journal={TEXTILE RESEARCH JOURNAL}, author={Gawish, S. M. and Ramadan, A. M. and Cornelius, C. E. and Bourham, M. A. and Matthews, S. R. and McCord, M. G. and Wafa, D. M. and Breidt, F.}, year={2007}, month={Feb}, pages={92–104} }
 @article{shin_son_il yoo_hudson_mccord_matthews_whang_2006, title={Functional finishing of nonwoven fabrics. I. Accessibility of surface modified PET spunbond by atmospheric pressure He/O-2 plasma treatment}, volume={100}, ISSN={["0021-8995"]}, DOI={10.1002/app.23825}, abstractNote={The surface of a polyethylene terephthalate (PET) spunbond nonwoven was modified by using atmospheric pressure He/O2 plasma treatment. Accessibility of the modified PET nonwoven has been investigated in terms of crystallinity, surface chemical composition, hydrophilicity, and dye uptake. Differential scanning calorimetry (DSC) for crystallinity measurement and X-ray photoelectron spectroscopy (XPS) for chemical composition measurement were used. Surface morphology was studied by using scanning electron microscopy (SEM) and atomic force microscopy (AFM). Percentage crystallinity increased due to the depletion of amorphous region by plasma etching. Redeposition of etched particles was observed. Oxygen-based functional groups on the surface of PET increase from 27 to about 32% after 90 s exposure. Wettability increases by more than 10 times and moisture regain increases by three times, compared with the untreated sample. Dye uptake was not changed significantly. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 100: 4306–4310, 2006}, number={6}, journal={JOURNAL OF APPLIED POLYMER SCIENCE}, author={Shin, Y and Son, K and Il Yoo, D and Hudson, S and McCord, M and Matthews, S and Whang, YJ}, year={2006}, month={Jun}, pages={4306–4310} }
 @article{matthews_mccord_bourham_2005, title={Poly(vinyl alcohol) desizing mechanism via atmospheric pressure plasma exposure}, volume={2}, ISSN={["1612-8869"]}, DOI={10.1002/ppap.200500056}, abstractNote={Atmospheric plasma desizing of poly(vinyl alcohol) (PVA) films was investigated using PVA films supplied by MonoSol LLC®. The MonoSol (MS) films were exposed to atmospheric plasma for 0.5 to 50 min in thirty-second increments with additional specimens exposed for 8.0 and 10.0 min durations. Plasma treatment included exposure to helium plasma (He), oxygenated-helium plasma (He/O 2 ), ed films were characterized by weight loss, surface ablation, molecular weight, and solubility. Weight loss data suggested a mechanism of continual ablation, which increases with increased exposure time until saturation. Redeposition of ablated species may take place because the treatment is in a closed-geometry and thus the saturation trend slightly changes. Thickness changes/surface ablation is in good correlation with the weight loss trends, which suggests that the ablation mechanism is responsible for surface removal. Gel permeation chromatography showed a progressive reduction in the weight-average molecular weight of the PVA chains with increasing treatment durations. This reduction is attributed to chain-scission caused by plasma exposure. Solubility tests showed an increase in solubility of plasma-exposed films in methanol, with a decrease in swelling. These results correlate well with the chain-scission observed through GPC and weight loss trends.}, number={9}, journal={PLASMA PROCESSES AND POLYMERS}, publisher={Weinheim: Wiley-VCH}, author={Matthews, SR and McCord, MG and Bourham, MA}, year={2005}, month={Nov}, pages={702–708} }
 @article{mccord_matthews_hudson_2004, title={Extrusion and analysis of nylon/montmorillonite nanocomposite filaments}, volume={36}, number={1}, journal={Journal of Advanced Materials}, author={McCord, M. G. and Matthews, S. R. and Hudson, S. M.}, year={2004}, pages={44–56} }
 @article{matthews_hwang_mccord_bourham_2004, title={Investigation into etching mechanism of polyethylene terephthalate (PET) films treated in helium and oxygenated-helium atmospheric plasmas}, volume={94}, ISSN={["1097-4628"]}, DOI={10.1002/app.21162}, abstractNote={This research makes an investigation into the etching mechanism of atmospheric plasma conditions on the surface of polyethylene terephthalate (PET) films. Two types of untreated PET films (S/200 and S/500) were exposed to plasma for 0 to 5.0 min in 30-s increments. The first set of each film type was treated in helium plasma, while the second was treated in oxygenated-helium plasma. Differential Scanning Calorimetry (DSC) was used to characterize pre- and post-exposure films. Weight changes and the degree of solubility were also determined. Based on peak area results, the percent crystallinity of PET S/200 increased by an average of 4.57% (helium treated) and 13.56% (oxygenated-helium treated), while the S/500 showed only a small increase. There was no significant change in the melting or crystallization temperatures of either film type, indicating a decrease in amorphous content versus an increase in crystalline material. Weight loss analysis supports this theory. Solubility testing revealed a continual decrease in swelling as exposure time was increased. A model was developed to predict the change in the degree of solubility for polyphase surfaces considering the etching rate per phase. The model was applied to PET with good correlation between the model and experimental data. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 94: 2383–2389, 2004}, number={6}, journal={JOURNAL OF APPLIED POLYMER SCIENCE}, author={Matthews, SR and Hwang, YJ and McCord, MG and Bourham, MA}, year={2004}, month={Dec}, pages={2383–2389} }
 @article{mccord_hwang_matthews_park_bourham_2004, title={Study of organic polymer film treated by helium generated atmospheric pressure plasma}, volume={151}, number={7}, journal={Journal of the Electrochemical Society}, author={McCord, M. G. and Hwang, Y. J. and Matthews, S. R. and Park, Y. C. and Bourham, M. A.}, year={2004}, pages={C495–501} }
 @article{hwang_matthews_mccord_bourham_2004, title={Surface modification of organic polymer films treated in atmospheric plasmas}, volume={151}, ISSN={["1945-7111"]}, DOI={10.1149/1.1756891}, abstractNote={The effect of plasma treatment on surface characteristics of polyethylene terephthalate films was investigated using helium and oxygenated-helium atmospheric plasmas. Sample exposure to plasma was conducted in a closed ventilation test cell inside the main plasma chamber with variable exposure times. The percent weigh loss of the samples showed an initial increase followed by decrease with extended exposure time, indicating a combined mechanism of etching and redeposition. The wettability as measured by the contact angle showed a sharp initial increase followed by a steady-state trend with increased exposure time, suggesting a change in surface functionality. Atomic force microscopy analysis revealed increase in surface roughness, as well as evidence of redeposition of etched volatiles. Functionality changes were measured using X-ray photoelectron spectroscopy and these changes were correlated to the new plasma-induced properties.}, number={7}, journal={JOURNAL OF THE ELECTROCHEMICAL SOCIETY}, author={Hwang, YJ and Matthews, S and McCord, M and Bourham, M}, year={2004}, pages={C495–C501} }