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The dynamic swelling behaviour of chitosan-based hydrogels

✍ Scribed by Yao, Kang-De; Liu, Jing; Cheng, Guo-Xiang; Zhao, Ren-Zhe; Wang, Wen Hua; Wei, Long

Publisher
John Wiley and Sons
Year
1998
Tongue
English
Weight
258 KB
Volume
45
Category
Article
ISSN
0959-8103

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✦ Synopsis

A comparative study of the swelling behaviour of crosslinked chitosan (cr-CS) and its semi-interpenetrating polymer network (IPN) with poly-(oxypropylene glycol) (cr-CS/PE semi-IPN) was carried out by DSC, NMR and positron annihilation lifetime spectroscopy (PALS). The results reveal that cr-CS/PE semi-IPN containing hydrophobic moieties has more free volume for water at a deÐnite water content and restricts its mobility less. NMR and PALS data indicate that water clusters coexist with water molecules hydrogen-bonded to the network at the beginning of swelling.

1998 SCI.

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