A NEW MOLECULAR-MODEL FOR COMPLEXATION BETWEEN CARBOXYMETHYLCELLULOSE AND ALKALINE-EARTH METAL-IONS IN AQUEOUS SYSTEMS

被引：8
|
作者：
MATSUMOTO, T
ZENKOH, H
机构：
[1] Department of Polymer Chemistry, Kyoto University, Kyoto
来源：
FOOD HYDROCOLLOIDS | 1992年 / 6卷 / 04期
关键词：
D O I：
10.1016/S0268-005X(09)80005-2
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
A new molecular model for the complexation between carboxymethylcellulose (CMC) and alkaline-earth metal ions has been discussed through the change in relaxation time and radius of gyration of the polymer. Elongation of the relaxation time of the CMC main chain due to the complexation is inedependent of the choice of alkaline-earth metal ion, but depends only on the numbers of metal ions bound to CMC. The radius of gyration of CMC in aqueous systems is elongated by complexation. In the new model for the complexation, there are two possibilities for the complex site. The rotational angle around the bond between the neighbouring residues decreases with complex formation from approximately 60 to 21-degrees.
引用
收藏
页码：379 / 386
页数：8
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