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Polyelectrolyte complexation of chitosan and WS2 nanotubes
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Magee, Eimear, Xie, Fengwei, Farris, Stefano, Dsouza, Andrea, Constantinidou, Chrystala, Zak, Alla, Tenne, Reshef and McNally, Tony (2023) Polyelectrolyte complexation of chitosan and WS2 nanotubes. Advanced Materials Interfaces, 11 (6). 2300501. doi:10.1002/admi.202300501 ISSN 2196-7350.
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Official URL: https://doi.org/10.1002/admi.202300501
Abstract
The inclusion of tungsten disulphide nanotubes (WS2 NTs) in chitosan, plasticized with glycerol, facilitates the formation of a polyelectrolyte complex. The glycerol interrupts the intramolecular hydrogen bonding between chitosan chains allowing positively charged protonated amines of chitosan to form a complex with negatively charged oxygen ions chemisorbed to the tungsten atoms in defects. These interactions, with the unique mechanical and chemical properties of WS2 NTs, result in a chitosan film with superior properties relative to unfilled chitosan. Even at low WS2 NT loadings (≤1 wt%), the Young's modulus (E) increases by 59%, tensile strength (σ) by 40% and tensile toughness by 74%, compared to neat chitosan, without sacrificing ductility. Addition of highly dispersed WS2 NTs significantly improves the gas barrier properties of chitosan, with a 50% reduction in oxygen permeability, while the addition of both glycerol and WS2 NTs to chitosan effectively reduces the carbon dioxide permeability by 80% and the water vapor transmission rate by 90%. The intrinsic antimicrobial efficacy of chitosan against both Gram-positive and Gram-negative bacteria is enhanced on inclusion of WS2 NTs. Polyelectrolyte complexation of WS2 NTs and glycerol-plasticized chitosan provides a cost-effective, sustainable route to biodegradable films with desirable mechanical, gas barrier properties, and antimicrobial efficacy suitable for food packaging applications.
Item Type: | Journal Article | |||||||||
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Subjects: | Q Science > QD Chemistry Q Science > QP Physiology T Technology > TA Engineering (General). Civil engineering (General) T Technology > TP Chemical technology |
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Divisions: | Faculty of Science, Engineering and Medicine > Medicine > Warwick Medical School Faculty of Science, Engineering and Medicine > Engineering > WMG (Formerly the Warwick Manufacturing Group) |
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Library of Congress Subject Headings (LCSH): | Chitosan , Polyelectrolytes, Chitosan -- Biotechnology, Antimicrobial polymers, Composite materials, Tungsten compounds, Nanotubes | |||||||||
Journal or Publication Title: | Advanced Materials Interfaces | |||||||||
Publisher: | Wiley | |||||||||
ISSN: | 2196-7350 | |||||||||
Official Date: | February 2023 | |||||||||
Dates: |
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Volume: | 11 | |||||||||
Number: | 6 | |||||||||
Article Number: | 2300501 | |||||||||
DOI: | 10.1002/admi.202300501 | |||||||||
Status: | Peer Reviewed | |||||||||
Publication Status: | Published | |||||||||
Access rights to Published version: | Open Access (Creative Commons) | |||||||||
Date of first compliant deposit: | 27 November 2023 | |||||||||
Date of first compliant Open Access: | 16 January 2024 | |||||||||
RIOXX Funder/Project Grant: |
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