1. Engineering cellulose nanopaper with water resistant, antibacterial, and improved barrier properties by impregnation of chitosan and the followed halogenation.
- Author
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Du H, Parit M, Liu K, Zhang M, Jiang Z, Huang TS, Zhang X, and Si C
- Subjects
- Anti-Bacterial Agents pharmacology, Cellulose pharmacology, Chitosan pharmacology, Escherichia coli drug effects, Halogenation, Paper, Spectroscopy, Fourier Transform Infrared methods, Staphylococcus aureus drug effects, Tensile Strength, Anti-Bacterial Agents chemistry, Cellulose chemistry, Chitosan chemistry, Nanofibers chemistry, Water chemistry
- Abstract
This work demonstrated a facile and sustainable approach to functionalize cellulose nanopaper (CNP) by impregnation of chitosan (CS) and the followed halogenation. It was found that the tensile strength of the functionalized CNP (CNP/CS-Cl) was enhanced by 38.3% and 512.6% at dry and wet conditions, respectively. Meanwhile, the total transmittance (at 550 nm) of CNP/CS-Cl was increased from 75% of pure CNP to 85%, with 35% decrease in optical haze. Moreover, the CNP/CS-Cl exhibited significant enhancement in barrier properties. Importantly, part of the amino groups on CS were transformed into N-halamines during the halogenation process, which endowed the CNP/CS-Cl with excellent antibacterial performance against both S. aureus and E. coli with 100% bacterial reduction after 10 min of contact. Thus, this work provides a simple and efficient approach to functionalize CNP with water resistance, high transparency, excellent antibacterial and barrier properties, which will expand the potential applications of CNP., (Copyright © 2021 Elsevier Ltd. All rights reserved.)
- Published
- 2021
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