Photoregulated sol-gel transition of novel azobenzene-functionalized hydroxypropyl methylcellulose and its α-cyclodextrin complexes

被引：64

作者：

Zheng, PJ

Hu, X

Zhao, XY

Li, L

Tam, KC

Gan, LH

机构：

[1] Nanyang Technol Univ, Sch Mat Engn, Singapore 639798, Singapore

[2] Nanyang Technol Univ, Sch MPE, Singapore 639798, Singapore

[3] Nanyang Technol Univ, Natl Inst Educ, Singapore 639798, Singapore

来源：

MACROMOLECULAR RAPID COMMUNICATIONS | 2004年 / 25卷 / 05期

关键词：

azo polymers; biopolymers; gelation; inclusion chemistry; photo-regulation;

D O I：

10.1002/marc.200300123

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Novel azobenzene-functionalized hydroxypropyl methylcellulose (AZO-HPMC) polymers and their alpha-cyclodextrin (alpha-CD) complexes have been prepared. These polymers show interesting sol-gel transition behavior in aqueous solutions. In the absence of alpha-CD, the gelation temperature increases after UV irradiation, while in the presence of alpha-CD, the gelation temperature decreases after UV irradiation. The difference in the gelation temperatures between the trans and cis samples of AZO-HPMC opens a wide operating window for reversible-regulation of the sol-gel transition behavior by photoirradiation.

引用

页码：678 / 682

页数：5

共 18 条

[1] High-pressure studies as a novel approach in determining inclusion mechanisms:: Thermodynamics and kinetics of the host-guest interactions for α-cyclodextrin complexes [J].