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Water in dextran hydrogels
Author(s) -
Chen Jun,
Yi JuZhen,
Zhang LiMing
Publication year - 2010
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/app.32066
Subject(s) - self healing hydrogels , dextran , differential scanning calorimetry , thermogravimetric analysis , polymer chemistry , chemistry , bound water , potassium , proton nmr , chemical engineering , materials science , organic chemistry , molecule , thermodynamics , physics , engineering
A series of dextran hydrogels were synthesized with potassium chloride as a crosslinker. 13 C‐NMR and 17 O‐NMR were used to study the crosslinking role of potassium chloride. Differential scanning calorimetry and thermogravimetric analysis were used to study the state and properties of water in the dextran hydrogels. We found there were three kinds of water in the physically crosslinked dextran hydrogels: free water, freezing bound water, and nonfreezing water. The maximum amount of nonfreezing water in the 50% dextran hydrogel was about 8%. Both 13 C‐NMR and 17 O‐NMR spectra proved that KCl played the crosslinking role and it interacted with dextran via the oxygen atoms linked to C 4 and C 6 and, also, the oxygen atom linked to C 1 on the dextran ring. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2010