THE DYNAMIC SWELLING BEHAVIOR OF CHITOSAN-BASED HYDROGELS

Authors
YAO KD LIU J CHENG GX ZHAO RZ WANG WH WEI L
Citation
Kd. Yao et al., THE DYNAMIC SWELLING BEHAVIOR OF CHITOSAN-BASED HYDROGELS, Polymer international, 45(2), 1998, pp. 191-194
Citations number
8
Categorie Soggetti
Polymer Sciences
Journal title
Polymer international → ACNP
ISSN journal
09598103
Volume
45
Issue
2
Year of publication
1998
Pages
191 - 194
Database
ISI
SICI code
0959-8103(1998)45:2<191:TDSBOC>2.0.ZU;2-D
Abstract
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 a nd positron annihilation lifetime spectroscopy (:PALS). The results re veal that cr-CS/PE semi-IPN containing hydrophobic moieties has more f ree volume for water at a definite water content and restricts its mob ility less. NMR and PALS data indicate that water clusters coexist wit h water molecules hydrogen-bonded to the network at the beginning of s welling. (C) 1998 SCI.