Characterization of water in polysaccharide hydrogels by DSC

被引：0
|
作者：
Yoshida, H. [1 ]
Hatakeyama, T. [1 ]
Hatakeyama, H. [1 ]
机构：
[1] Tokyo Metropolitan Univ, Tokyo, Japan
来源：
Journal of thermal analysis | 1993年 / 40卷 / 02期
关键词：
Calorimetry - Crystal growth - Freezing - Phase transitions - Water;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Water molecules in hydrogels were classified into three categories according to phase transition behavior; non-freezing, freezing bound and free water. Melting, crystallization, and glass transition of water in hydrogels reflected the state of the water interacting with polysaccharides. Freezing bound water formed metastable ice by slow cooling and formed amorphous ice by quenching. From the isothermal crystallization measurement, nucleation rate and crystal growth rate were obtained. The crystal growth rate of freezing bound water was about ten times slower than that of free water. The DSC characterization of water in hydrogels was summarized.
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页码：483 / 489
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