2020 journal article

Color-Variable Photodynamic Antimicrobial Wool/Acrylic Blended Fabrics

MATERIALS, 13(18).

By: T. Wang*, W. Chen*, T. Dong*, Z. Lv*, S. Zheng*, X. Cao, Q. Wei*, R. Ghiladi n, Q. Wang*

co-author countries: China 🇨🇳 United States of America 🇺🇸
author keywords: antibacterial; photodynamic; apparent color; blended fabric; photosensitizer; rose bengal; cationic dyes; wool; acrylic
Source: Web Of Science
Added: November 9, 2020

Towards the goal of developing scalable, economical and effective antimicrobial textiles to reduce infection transmission, here we prepared color-variable photodynamic materials comprised of photosensitizer (PS)-loaded wool/acrylic (W/A) blends. Wool fibers in the W/A blended fabrics were loaded with the photosensitizer rose bengal (RB), and the acrylic fibers were dyed with a variety of traditional cationic dyes (cationic yellow, cationic blue and cationic red) to broaden their color range. Investigations on the colorimetric and photodynamic properties of a series of these materials were implemented through CIELab evaluation, as well as photooxidation and antibacterial studies. Generally, the photodynamic efficacy of these dual-dyed fabrics was impacted by both the choice, and how much of the traditional cationic dye was employed in the dyeing of the W/A fabrics. When compared with the PS-only singly-dyed material, RB-W/A, that showed a 99.97% (3.5 log units; p = 0.02) reduction of Staphylococcus aureus under visible light illumination (λ ≥ 420 nm, 60 min), the addition of cationic dyes led to a slight decrease in the photoinactivation ability of the dual-dyed fabrics, but was still able to achieve a 99.3% inactivation of S. aureus. Overall, our findings demonstrate the feasibility and potential applications of low cost and color variable RB-loaded W/A blended fabrics as effective self-disinfecting textiles against pathogen transmission.