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Cellulose nanofiber (CNF) was isolated from Okara using deep eutectic solvent (DES) with high-speed stirring. The composite hydrogels obtained by using different proportions of CNF and sodium alginate (SA) had different properties. The CNF/SA composite hydrogels were analyzed using Fourier transform infrared spectroscopy and scanning electron microscopy and tested for compression properties, rheological properties, water content, and swelling degree. Physical crosslinking between SA and Ca2+, and different degrees of hydrogen bond formation between SA and CNF were observed. The CNF/SA composite hydrogel have great potential as reinforcements in eco-friendly composite hydrogels for diverse applications.


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Preparation and Properties of Nano-cellulose/Sodium Alginate Composite Hydrogel

Show Author's information Peiyi Li1,2,3( )Ruiyan Liu1Haozhe Lei1Miaomiao Zhou1Boxing Jian1Xinping Li1,2,3
College of Bioresources Chemical and Materials Engineering, National Demonstration Center for Experimental Light Chemistry Engineering Education, Shaanxi University of Science and Technology, Xi'an, Shaanxi Province, 710021, China
Key Laboratory of Paper Based Functional Materials of China National Light Industry, Xi'an, Shaanxi Province, 710021, China
Shaanxi Provincial Key Laboratory of Papermaking Technology and Specialty Paper Development, Xi'an, Shaanxi Province, 710021, China

Abstract

Cellulose nanofiber (CNF) was isolated from Okara using deep eutectic solvent (DES) with high-speed stirring. The composite hydrogels obtained by using different proportions of CNF and sodium alginate (SA) had different properties. The CNF/SA composite hydrogels were analyzed using Fourier transform infrared spectroscopy and scanning electron microscopy and tested for compression properties, rheological properties, water content, and swelling degree. Physical crosslinking between SA and Ca2+, and different degrees of hydrogen bond formation between SA and CNF were observed. The CNF/SA composite hydrogel have great potential as reinforcements in eco-friendly composite hydrogels for diverse applications.

Keywords: sodium alginate, cellulose nanofiber, composite hydrogel, Okara

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Publication history

Received: 07 April 2021
Accepted: 09 July 2021
Published: 25 October 2021
Issue date: October 2021

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© 2021 Paper and Biomaterials

Acknowledgements

This work was supported by the Foundation of State Key Laboratory of Pulp and Paper Engineering (201819), the project of Shaanxi Provincial Department of Education Key Laboratory Research Open Fund (Grant No. 17JS017), and the Project of Shaanxi University of Science and Technology Research Initial Fund (Grant No. BJ15-29).

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This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)

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