Fabrication of core or shell reversibly photo cross-linked micelles and nanogels from double responsive water-soluble block copolymers

被引:76
作者
Jin, Qiao [1 ]
Liu, Xiangsheng [1 ]
Liu, Gongyan [1 ]
Ji, Jian [1 ]
机构
[1] Zhejiang Univ, Minst Educ, Dept Polymer Sci, Key Lab Macromol Synth & Functionalizat, Hangzhou 310027, Peoples R China
关键词
Photo cross-linking; Nanogel; Micelle; TRIBLOCK COPOLYMERS; MICELLIZATION; STABILIZATION; TEMPERATURE; BEHAVIOR; LINKING;
D O I
10.1016/j.polymer.2010.01.026
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(butanechoic acid, 1-[3-[(2-methyl-1-oxo-2-propen-1-yl)oxy]propy]) ester)-b-poly(methoxydi(ethylene glycol) methacrylate-co-4-methyl-[7-(methacryloyl)oxyethyloxy] coumarin) (PSPMA-b-P(DEGMMA-co-CMA)) block copolymer was synthesized via atom transfer radical polymerization (ATRP) The temperature and pH responsive micellization behaviors of PSPMA-b-P( DEGMMA-co-CMA) were investigated to obtain P(DEGMMA-co-CMA)-core and PSPMA-core micelles. After the two types of micelles were exposed to 365 nm UV light, core cross-linked (CCL) micelles and shell cross-linked (SCL) micelles were facilely prepared The photo cross-linking was proved to be reversibly controlled under alternative irradiation of 365 nm and 254 nm UV light More interestingly, block copolymer nanogels were fabricated by translating the hydrophobic core of the CCL and SCL micelles into hydrophilic via adjusting the temperature and pH. The sizes of the block copolymer nanogels can be facilely controlled by UV light irradiation The introduction of reversibly photo cross-linkable groups into the double responsive block copolymers provides a novel approach to develop more sophisticated, controllable, and smarter nanocarriers that might have great potentials in biomedical applications (C) 2010 Elsevier Ltd. All rights reserved
引用
收藏
页码:1311 / 1319
页数:9
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