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Studies on dynamic behavior of water in crosslinked chitosan hydrogel
Author(s) -
Cheng GuoXiang,
Liu Jing,
Zhao RenZhe,
Yao KangDe,
Sun PingChuan,
Men AiJu,
Wang WenHua,
Wei Long
Publication year - 1998
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/(sici)1097-4628(19980207)67:6<983::aid-app3>3.0.co;2-i
Subject(s) - chitosan , swelling , proton , materials science , self healing hydrogels , polymer , polymer chemistry , spectroscopy , relaxation (psychology) , chemical engineering , nuclear magnetic resonance spectroscopy , chemistry , composite material , organic chemistry , physics , psychology , social psychology , quantum mechanics , engineering
The dynamic behavior of water in crosslinked chitosan (cr‐CS) was studied at the molecular level by proton nuclear magnetic resonance ( 1 H‐NMR) spectroscopy and positron annihilation lifetime spectroscopy (PALS). Proton line width was used as a direct parameter of local mobility during swelling. The dynamic behavior of water in hydrogel can be described by the two following processes: physical movement along free volume cavities in network and binding with hydrophilic groups of hydrogel. The formation of bound water and the effect of water on polymer network were correlated with the relaxation of hydrogel network. © 1998 John Wiley & Sons, Inc. J Appl Polym Sci 67:983–988, 1998