Shahbazi, M, Rajabzadeh, G, Ettelaie, R et al. (1 more author) (2016) Kinetic study of k-carrageenan degradation and its impact on mechanical and structural properties of chitosan/ k-carrageenan film. Carbohydrate Polymers, 142. pp. 167-176. ISSN 0144-8617
Abstract
The purpose of the current research was to study κ-carrageenan degradation behavior under thermal treatment, and its influence on chitosan κ-carrageenan film properties. A pseudo-first-order reaction equation was applied by using reciprocal plots of κ-carrageenan molecular mass versus heating time, which showed a strong dependence on heating time. Incorporation of thermally treated κ-carrageenan into the chitosan had diminished both water resistance and water vapor permeability of the blend, in contrast to those for intact or untreated κ-carrageenan. A dramatic decrease of equilibrium moisture content and tensile strength were noticed, and these parameters were more affected by the longer times. Furthermore, the contact angle of the films was found to be a function of the heating time. Scanning electron microscopy revealed apparent agglomeration of κ-carrageenan through the thermal process. Atomic force microscopy demonstrated that the intact blend had the flattest surface, whilst the blend containing treated κ-carrageenan had high roughness.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2016 Elsevier Ltd. All rights reserved. This is an author produced version of a paper published in Carbohydrate Polymers. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | Thermal depolymerisation; Pseudo first-order reaction; Chitosan blend film; Equilibrium moisture content; Tensile strength; Surface roughness |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Environment (Leeds) > School of Food Science and Nutrition (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 11 Feb 2016 16:54 |
Last Modified: | 14 Apr 2017 02:39 |
Published Version: | http://dx.doi.org/10.1016/j.carbpol.2016.01.037 |
Status: | Published |
Publisher: | Elsevier |
Identification Number: | 10.1016/j.carbpol.2016.01.037 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:94501 |