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pH effect on correlation between water state and swelling kinetics of the crosslinked chitosan/polyether semi‐IPN hydrogel
Author(s) -
Guan Yun Lin,
Shao Lei,
Liu Jing,
Yao Kang De
Publication year - 1996
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(19961121)62:8<1253::aid-app15>3.0.co;2-8
Subject(s) - swelling , self healing hydrogels , differential scanning calorimetry , kinetics , chitosan , bound water , diffusion , chemical engineering , polymer chemistry , chemistry , materials science , composite material , molecule , organic chemistry , thermodynamics , physics , quantum mechanics , engineering
The water state in crosslinked chitosan/polyether semi‐IPN(cr‐CS/PEsemi‐IPN) hydrogels swollen in buffer solutions with various pH values was studied using differential scanning calorimetry (DSC). The results show that the total water content and the amount of bound water is related to the pH values of the swelling medium. The swelling kinetics of the hydrogel was investigated as well. The diffusion coefficient is correlated with the water state of the swollen hydrogel. It suggests that the change in the diffusion coefficient is related to the relative composition of bound water and nonbound water. © 1996 John Wiley & Sons, Inc.