Ion-specific swelling of hydrophilic polymer gels

被引：94
|
作者：
Muta, H [1 ]
Miwa, M [1 ]
Satoh, M [1 ]
机构：
[1] Tokyo Inst Technol, Dept Chem & Mat Sci, Meguro Ku, Tokyo 1520033, Japan
来源：
POLYMER | 2001年 / 42卷 / 14期
关键词：
ion-specific swelling; hydrophilic polymer gel; hydrogen-bonding hydration;
D O I：
10.1016/S0032-3861(01)00098-2
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Ion-specific swelling of poly(allylamine) (PAlAm) gel and poly(vinyl alcohol) (PVA) gel was investigated in various aqueous salt solutions. Both the gels slightly swelled in the presence of small cations (e.g. Li+) and markedly deswelled in the presence of small anions (e.g. F-), in a similar way as previously found for poly(N-vinylpyrrolidone) (PVP) gel. However, a significant difference was observed among the gels swollen in aqueous NaCl system; only PVA gel showed a remarkable deswelling at the higher NaCl concentration region. These ion-specific swelling behaviors were interpreted in terms of ion effects on the hydrogen-bonding hydration to the pertinent polar groups. (C) 2001 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码：6313 / 6316
页数：4
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