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Thermomechanically processed chitosan : gelatin films being transparent, mechanically robust and less hygroscopic
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Chen, Ying, Duan, Qingfei, Yu, Long and Xie, Fengwei (2021) Thermomechanically processed chitosan : gelatin films being transparent, mechanically robust and less hygroscopic. Carbohydrate Polymers, 272 . 118522. doi:10.1016/j.carbpol.2021.118522 ISSN 0144-8617.
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Official URL: http://dx.doi.org/10.1016/j.carbpol.2021.118522
Abstract
Chitosan and gelatin are attractive polymeric feedstocks for developing environmentally benign, bio-safe, and functional materials. However, cost-effective methods to achieve advantageous materials properties and tailor their functionality are still lacking, but interesting. Herein, we found that physically mixing chitosan and gelatin at 1:1 (w/w) ratio resulted in materials with properties (higher Young's modulus (603.8 MPa) and tensile strength (33.6 MPa), and reduced water uptake (45%) after 6 h of water soaking) better than those of the materials based on mainly chitosan or gelatin. We attribute this synergy to the ionic and hydrogen-bonding interactions between the two biopolymers enabled by high-viscosity thermomechanical processing. Despite the lowest hygroscopicity, the 1:1 chitosan:gelatin films displayed the highest surface hydrophilicity. Besides, addition of gelatin to chitosan led to films being brighter, more transparent and amorphous. Thus, this work has generated new understanding to enhance the application of biopolymers for e.g. packaging, coating, and biomedical applications.
Item Type: | Journal Article | |||||||||||||||
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Subjects: | T Technology > TP Chemical technology | |||||||||||||||
Divisions: | Faculty of Science, Engineering and Medicine > Engineering > WMG (Formerly the Warwick Manufacturing Group) | |||||||||||||||
Library of Congress Subject Headings (LCSH): | Chitosan, Biopolymers, Gelatin, Polymers -- Mechanical properties, Polymers -- Optical properties | |||||||||||||||
Journal or Publication Title: | Carbohydrate Polymers | |||||||||||||||
Publisher: | Pergamon Press | |||||||||||||||
ISSN: | 0144-8617 | |||||||||||||||
Official Date: | 15 November 2021 | |||||||||||||||
Dates: |
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Volume: | 272 | |||||||||||||||
Article Number: | 118522 | |||||||||||||||
DOI: | 10.1016/j.carbpol.2021.118522 | |||||||||||||||
Status: | Peer Reviewed | |||||||||||||||
Publication Status: | Published | |||||||||||||||
Access rights to Published version: | Restricted or Subscription Access | |||||||||||||||
Date of first compliant deposit: | 13 August 2021 | |||||||||||||||
Date of first compliant Open Access: | 4 August 2022 | |||||||||||||||
RIOXX Funder/Project Grant: |
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