Preparation and characterization of multiresponsive polymer composite microspheres with core-shell structure

被引：55
作者：
Cai, Jie
Guo, Jia
Ji, Minglei
Yang, Wuli [1 ]
Wang, Changchun
Fu, Shoukuan
机构：
[1] Fudan Univ, Key Lab Mol Engn Polymers, Minist Educ, Shanghai 200433, Peoples R China
[2] Fudan Univ, Key Lab Mol Engn Polymers, Dept Macromol Sci, Shanghai 200433, Peoples R China
来源：
COLLOID AND POLYMER SCIENCE | 2007年 / 285卷 / 14期
关键词：
polymer composite microspheres; core-shell; multiresponsive;
D O I：
10.1007/s00396-007-1735-4
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Fe3O4/SiO2/poly (N-isopropylacrylamide-co-N,N-dimethylaminoethyl methacrylate) [P(NIPAM-co-DMA)] multiresponsive composite microspheres with core-shell structure were synthesized by template precipitation polymerization. First, the magnetite nanoparticles were coated with silica and then modified with 3-(trimethoxysilyl)-propyl methacrylate (MPS). Subsequently, the Fe3O4/SiO2 particles grafted with MPS were used to seed the precipitation copolymerization of NIPAM and DMA. The composite microspheres with core-shell structure were superparamagnetic, pH-sensitive, and thermoresponsive. The swelling ratio (D-25 degrees C,D- (pH = 3)/D-50 degrees C,D- (pH = 9))(3) coupling of pH and temperature increased up to 21.2, which was much higher than that without comonomer DMA.
引用
收藏
页码：1607 / 1615
页数：9
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