LAPSE:2019.0656
Published Article
LAPSE:2019.0656
Viscoelastic Properties of Crosslinked Chitosan Films
July 25, 2019
Chitosan films containing citric acid were prepared using a multi-step process called heterogeneous crosslinking. These films were neutralized first, followed by citric acid addition, and then heat treated at 150 °C/0.5 h in order to potentially induce covalent crosslinking. The viscoelastic storage modulus, E′, and tanδ were studied using dynamic mechanical analysis, and compared with neat and neutralized films to elucidate possible crosslinking with citric acid. Films were also prepared with various concentrations of a model crosslinker, glutaraldehyde, both homogeneously and heterogeneously. Based on comparisons of neutralized films with films containing citric acid, and between citric acid films either heat treated or not heat treated, it appeared that the interaction between chitosan and citric acid remained ionic without covalent bond formation. No strong evidence of a glass transition from the tanδ plots was observable, with the possible exception of heterogeneously crosslinked glutaraldehyde films at temperatures above 200 °C.
Record ID
Keywords
chitosan, citric acid, crosslinking, glutaraldehyde, heterogeneous crosslinking, viscoelasticity
Subject
Suggested Citation
Khouri J, Penlidis A, Moresoli C. Viscoelastic Properties of Crosslinked Chitosan Films. (2019). LAPSE:2019.0656
Author Affiliations
Khouri J: Department of Chemical Engineering, University of Waterloo, 200 University Avenue West, Waterloo, ON N2L 3G1, Canada
Penlidis A: Department of Chemical Engineering, University of Waterloo, 200 University Avenue West, Waterloo, ON N2L 3G1, Canada [ORCID]
Moresoli C: Department of Chemical Engineering, University of Waterloo, 200 University Avenue West, Waterloo, ON N2L 3G1, Canada
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Penlidis A: Department of Chemical Engineering, University of Waterloo, 200 University Avenue West, Waterloo, ON N2L 3G1, Canada [ORCID]
Moresoli C: Department of Chemical Engineering, University of Waterloo, 200 University Avenue West, Waterloo, ON N2L 3G1, Canada
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Journal Name
Processes
Volume
7
Issue
3
Article Number
E157
Year
2019
Publication Date
2019-03-14
Published Version
ISSN
2227-9717
Version Comments
Original Submission
Other Meta
PII: pr7030157, Publication Type: Journal Article
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Published Article
LAPSE:2019.0656
This Record
External Link
doi:10.3390/pr7030157
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Version History
[v1] (Original Submission)
Jul 25, 2019
Verified by curator on
Jul 25, 2019
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v1
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https://psecommunity.org/LAPSE:2019.0656
Original Submitter
Calvin Tsay
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