Shape imprinting due to variable disulfide bonds in-polyacrylamide gels

被引：8

作者：

Greytak, AB ^{[1
]}

Grosberg, AY

Tanaka, T

机构：

[1] MIT, Dept Phys, Cambridge, MA 02139 USA

[2] MIT, Ctr Mat Sci & Engn, Cambridge, MA 02139 USA

来源：

JOURNAL OF CHEMICAL PHYSICS | 2001年 / 114卷 / 23期

关键词：

D O I：

10.1063/1.1369139

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Through the use of variable disulfide crosslinkers, we have created polyacrylamide gels whose shape can be altered after polymerization. N,N' -bisacryloylcystamine is incorporated as a crosslinker, along with a smaller amount of a permanent crosslinker. After polymerization, the disulfide bonds are cleaved into thiols through reduction. By reoxidizing the thiols with the gel held in a new macroscopic shape, a new set of disulfide bonds is formed, and the gel is forced to adopt the new shape. Retension of the new shape improves with greater distortion from the original shape, as well as with increased concentration of variable disulfide bonds. A simple theoretical model has been developed to explain these data, although the enigmatic kinetics of relaxation remain unexplained. (C) 2001 American Institute of Physics.

引用

页码：10551 / 10556

页数：6