Reversible Photocontrolled Swelling-Shrinking Behavior of Micron Vesicles Self-Assembled from Azopyridine-Containing Diblock Copolymer

被引：55

作者：

Han, Kuo ^{[1
]}

Su, Wei ^{[1
]}

Zhong, Mincheng ^{[2
]}

Yan, Qing ^{[1
]}

Luo, Yanhua ^{[1
]}

Zhang, Qijin ^{[1
]}

Li, Yinmei ^{[2
]}

机构：

[1] Univ Sci & Technol China, Key Lab Soft Matter Chem, Key Lab Optoelect Sci & Technol, Dept Polymer Sci & Engn, Hefei 230026, Anhui, Peoples R China

[2] Univ Sci & Technol China, Dept Phys, Hefei 230026, Anhui, Peoples R China

来源：

MACROMOLECULAR RAPID COMMUNICATIONS | 2008年 / 29卷 / 23期

基金：

美国国家科学基金会;

关键词：

azopyridine; block copolymer; reversible addition fragmentation chain transfer (RAFT) polymerization; swelling; vesicles;

D O I：

10.1002/marc.200800483

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Poly(N-isopropylacrylamide)-block-poly{6-[4-(4-pyridyazo)phenoxy] hexylmethacrylate} (PNIPAM-b-PAzPy) was synthesized by successive reversible addition-fragmentation chain transfer (RAFT) polymerization. In a water/tetrahydrofuran (H2O/THF) mixture, amphiphilic PNIPAM-b-PAzPy self-assembles into giant micro-vesicles. Upon alternate ultraviolet (UV) and visible light irradiation, obvious reversible swelling-shrinking of the vesicles was observed directly under an optical microscope. The maximum percentage increase in volume, caused by the UV light, reached 17%. Moreover, the swelling could be adjusted using the UV light power density. The derivation of this effect is due to photoinduced reversible isomerization of azopyridine units in the vesicles.

引用

页码：1866 / 1870

页数：5

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