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Preparation of a novel double crosslinked chitin aerogel via etherification with high strength.

Authors :
Wang J
Chen Z
Naguib HE
Source :
Carbohydrate polymers [Carbohydr Polym] 2021 Aug 01; Vol. 265, pp. 118014. Date of Electronic Publication: 2021 Apr 02.
Publication Year :
2021

Abstract

In this study, we introduced a novel double crosslinked chitin aerogel via etherification with EGDE for mechanical reinforcement. Samples with different EGDE: chitin weight ratios from 0 to 1.5:1 were fabricated through chitin dissolution in KOH/urea aqueous solution, ethanol neutralization and washing, and supercritical CO <subscript>2</subscript> drying. Both the physical and chemical crosslinking maintained the high porosity and light weight of chitin aerogels. The morphology under SEM has shown the close-ended and denser fibrils alignment for EGDE crosslinked aerogels and the mesoporous and macroporous structure induced by emulsion effect from excessive EGDE. FTIR characterization was conducted for chemical structure analysis. Compressive testing showed an increase of 247 % compressive strength at 10 % strain and 243 % modulus could be achieved at 1.0 EGDE samples. TGA results revealed a delayed thermal degradation for the chemically crosslinked samples. This study demonstrates EGDE an effective chemical crosslinker for reinforced chitin aerogels.<br /> (Copyright © 2021 Elsevier Ltd. All rights reserved.)

Details

Language :
English
ISSN :
1879-1344
Volume :
265
Database :
MEDLINE
Journal :
Carbohydrate polymers
Publication Type :
Academic Journal
Accession number :
33966821
Full Text :
https://doi.org/10.1016/j.carbpol.2021.118014