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Published in: Cellulose 9/2019

13-05-2019 | Original Research

Biological–chemical modification of cellulose nanocrystal to prepare highly compatible chitosan-based nanocomposites

Authors: Yanan Liu, Yuanyuan Yu, Qiang Wang, Jin Xu, Xuerong Fan, Ping Wang, Jiugang Yuan

Published in: Cellulose | Issue 9/2019

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Abstract

As a reinforcement material, negatively charged cellulose nanocrystal (CNC) has worse compatibility with positively charged polymer matrixes like chitosan due to Coulomb and possible depletion interaction. In this paper, we develop an eco-friendly biological–chemical approach that involves the use of O2/laccase/TEMPO system and Girard’s reagent T (GT) to oxidize and cationize the surface of CNC, that completely avoiding the formation of precipitation and/or aggregation during the preparation of CNC/chitosan bio-nanocomposites. The cross-sectional morphology of various nanocomposite films was observed by scanning electron microscopy. The addition of cellulose nanocrystals increased tensile strength (42%), decreased elongation at break (from 5.60 to 2.92%) and swelling degree (from 134 to 101%). This work offers a new path for the production of highly compatible CNC/cationic polymer composites which is different from commonly-used high-speed homogenization or stirring.

Graphical abstract

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Appendix
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Literature
go back to reference Szabolcs O (1961) Eine kolorimetrische Methode zur Bestimmung der reduzierenden Carbonylgruppen in der. Cellulose 15:41–44 Szabolcs O (1961) Eine kolorimetrische Methode zur Bestimmung der reduzierenden Carbonylgruppen in der. Cellulose 15:41–44
Metadata
Title
Biological–chemical modification of cellulose nanocrystal to prepare highly compatible chitosan-based nanocomposites
Authors
Yanan Liu
Yuanyuan Yu
Qiang Wang
Jin Xu
Xuerong Fan
Ping Wang
Jiugang Yuan
Publication date
13-05-2019
Publisher
Springer Netherlands
Published in
Cellulose / Issue 9/2019
Print ISSN: 0969-0239
Electronic ISSN: 1572-882X
DOI
https://doi.org/10.1007/s10570-019-02486-x

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