Multi-responsive hollow nanospheres self-assembly by amphiphilic random copolymer and azobenzene

被引：9
|
作者：
Wang, Yihan [1 ]
Hu, Lizhi [1 ]
Yin, Qiang [2 ]
Du, Kai [2 ]
Zhang, Taoran [1 ]
Yin, Qinjian [1 ]
机构：
[1] Sichuan Univ, Coll Chem, Chengdu 610064, Sichuan, Peoples R China
[2] China Acad Engn Phys, Res Ctr Laser Fus, POB 919-987, Mianyang 621900, Sichuan, Peoples R China
来源：
POLYMER | 2019年 / 175卷
基金：
中国国家自然科学基金;
关键词：
Triple-responsiveness; Hollow nanospheres; UCST behavior; Azobenzene-containing; Reversible self-assembly; CRITICAL SOLUTION TEMPERATURE; PHOTOINDUCED DEFORMATION; DIBLOCK COPOLYMER; BLOCK-COPOLYMER; TRANSITION; PH; MICELLES; PHOTO; WATER; POLYMERIZATION;
D O I：
10.1016/j.polymer.2019.04.071
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Thermo, pH, and photo triple-responsive hollow nanospheres self-assembled from amphiphilic random copolymer poly (styrene-stat-4-vinylpyridine) (PS-stat-P4VP) and azobenzene (AZO) 4-phenylazophenol have been investigated by means of TEM, SEM, FTIR, DLS and UV-vis spectrophotometry. Controlling over the ratio of PS-stat-P4VP and AZO can realize different size of hollow nanospheres. PS-stat-P4VP/AZO hollow nanospheres display UCST behavior and perform well reversible self-assembly and disassembly property between 25 degrees C and 45 degrees C as well as pH = 2.7 and pH = 8.1. Besides, the hollow nanospheres can be significantly elongated along the polarization direction of the polarizer, showing well photo-responsive performance. With the UCST of about 37 degrees C and pH responsive range close to human body, those PS-stat-P4VP/AZO hollow nanospheres demonstrate great potential in medicine and physiology.
引用
收藏
页码：235 / 242
页数：8
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