Sliding gels

被引：78

作者：

de Gennes, PG ^{[1
]}

机构：

[1] Coll France, F-75231 Paris, France

来源：

PHYSICA A | 1999年 / 271卷 / 3-4期

关键词：

sliding gels; rigidity; solvent quality;

D O I：

10.1016/S0378-4371(99)00227-7

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A set of negatively charged chains A, mixed with multi functional cationic molecules C, can generate a gel, where C acts as a cross-link. The A chains slide along the C bridges, provided that the number of AC contacts remains constant. We discuss the mechanics of these sliding gels in various situations (rigidity, solvent quality, etc). Contrary to naive expectations, we find that the sliding gels should not be particularly soft at low stresses: all the stored length has been used to swell the gel. We also consider the case of dilute solutions, with a few chains building up a "sliding branched object", which slides towards the most open form. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：231 / 237

页数：7