Journal
CARBOHYDRATE POLYMERS
Volume 61, Issue 4, Pages 393-398Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2005.04.017
Keywords
chitosan fiber; glyoxal; cross-linking; structure; property
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The effect of glyoxal cross-linking on the structure and properties of chitosan fiber has been studied using different techniques. Swelling results showed that the cross-linking process can be described by a formula such as: S=79.24-5.05C+0.24C(2) (S, swelling degree; C, glyoxal concentration). WAXD indicated that the cross-linking affects on the chitosan fibers at reducing of its crystallinity, e.g. from 34.7 to 27.2% for this case prepared fiber. Comparing to uncross-linked chitosan fiber, DSC and polarizing microscopy further indicated that the change of the crystal structure for cross-linked chitosan fiber is exactly affecting to the thermal properties. Additionally, SEM photographs showed that the cross-linking seems to play a role to smooth the surface, of fiber due to the surface of original chitosan fiber observed roughly. (C) 2005 Elsevier Ltd. All rights reserved.
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