Issue 7, 2022, Issue in Progress
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RSC Advances

Structure and properties of chitosan/sodium dodecyl sulfate composite films†

Song Jiang, ORCID logo a   Congde Qiao, ORCID logo *a   Xujie Wang, ORCID logo a   Zhongwei Li*a  and  Guihua Yanga  

* Corresponding authors

a School of Materials Science and Engineering, State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology (Shandong Academy of Sciences), Daxue Rd. 3501, Jinan 250353, PR China
E-mail: cdqiao@qlu.edu.cn, lizhw2007@126.com
Fax: +86 531 89631227
Tel: +86 531 89631227

Abstract

In this study, we investigated the effect of sodium dodecyl sulfate (SDS) content on the structure and properties of chitosan films. It is found that the binding of SDS to chitosan was realized through the interactions between –SO4− and –NH3+, forming an ionically cross-linked film. Structural analysis revealed that the crystallization was greatly hindered by introducing SDS. With an increase of SDS content, the glass transition temperatures (Tg) of chitosan films increased due to the formation of crosslinks. Compared to pure chitosan film, the composite films had lower content of moisture and possessed better thermal stability. In addition, the mechanical properties of the as-obtained composite films were closely related to the content of SDS, and were significantly improved in the biopolymer films with moderate SDS content. These results indicate that the microstructure as well as properties of the chitosan films can be regulated by adding SDS.

Graphical abstract: Structure and properties of chitosan/sodium dodecyl sulfate composite films

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Article information

DOI
https://doi.org/10.1039/D1RA08218C
Article type
Paper
Submitted
09 Nov 2021
Accepted
24 Jan 2022
First published
01 Feb 2022
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2022,12, 3969-3978

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Structure and properties of chitosan/sodium dodecyl sulfate composite films

S. Jiang, C. Qiao, X. Wang, Z. Li and G. Yang, RSC Adv., 2022, 12, 3969 DOI: 10.1039/D1RA08218C

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