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

Peijie Zheng; Xiao Hu; Xiongyan Zhao; Lin Li; Kam Chiu Tam; Leong Huat Gan

doi:10.1002/marc.200300123

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

Peijie Zheng, Xiao Hu^*, Xiongyan Zhao, Lin Li, Kam Chiu Tam, Leong Huat Gan

^*Corresponding author for this work

Nanyang Technological University

Research output: Contribution to journal › Article › peer-review

74 Citations (Scopus)

Abstract

Novel azobenzene-functionalized hydroxypropyl methylcellulose (AZO-HPMC) polymers and their α-cyclo-dextrin (α-CD) complexes have been prepared. These polymers show interesting sol-gel transition behavior in aqueous solutions. In the absence of α-CD, the gelation temperature increases after UV irradiation, while in the presence of α-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.

Original language	English
Pages (from-to)	678-682
Number of pages	5
Journal	Macromolecular Rapid Communications
Volume	25
Issue number	5
DOIs	https://doi.org/10.1002/marc.200300123
Publication status	Published - Mar 4 2004
Externally published	Yes

ASJC Scopus Subject Areas

Organic Chemistry
Polymers and Plastics
Materials Chemistry

Keywords

Azo polymers
Biopolymers
Gelation
Inclusion chemistry
Photo-regulation

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10.1002/marc.200300123

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

abstract = "Novel azobenzene-functionalized hydroxypropyl methylcellulose (AZO-HPMC) polymers and their α-cyclo-dextrin (α-CD) complexes have been prepared. These polymers show interesting sol-gel transition behavior in aqueous solutions. In the absence of α-CD, the gelation temperature increases after UV irradiation, while in the presence of α-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.",

keywords = "Azo polymers, Biopolymers, Gelation, Inclusion chemistry, Photo-regulation",

author = "Peijie Zheng and Xiao Hu and Xiongyan Zhao and Lin Li and Tam, {Kam Chiu} and Gan, {Leong Huat}",

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T1 - Photoregulated sol-gel transition of novel azobenzene-functionalized hydroxypropyl methylcellulose and its α-cyclodextrin complexes

AU - Zheng, Peijie

AU - Hu, Xiao

AU - Zhao, Xiongyan

AU - Li, Lin

AU - Tam, Kam Chiu

AU - Gan, Leong Huat

PY - 2004/3/4

Y1 - 2004/3/4

N2 - Novel azobenzene-functionalized hydroxypropyl methylcellulose (AZO-HPMC) polymers and their α-cyclo-dextrin (α-CD) complexes have been prepared. These polymers show interesting sol-gel transition behavior in aqueous solutions. In the absence of α-CD, the gelation temperature increases after UV irradiation, while in the presence of α-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.

AB - Novel azobenzene-functionalized hydroxypropyl methylcellulose (AZO-HPMC) polymers and their α-cyclo-dextrin (α-CD) complexes have been prepared. These polymers show interesting sol-gel transition behavior in aqueous solutions. In the absence of α-CD, the gelation temperature increases after UV irradiation, while in the presence of α-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.

KW - Azo polymers

KW - Biopolymers

KW - Gelation

KW - Inclusion chemistry

KW - Photo-regulation

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

Abstract

ASJC Scopus Subject Areas

Keywords

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