低临界溶液温度
分散性
乙二醇
材料科学
化学工程
粒径
自由基聚合
PEG比率
高分子化学
化学
聚合
共聚物
聚合物
复合材料
工程类
经济
财务
作者
Tong Cai,Manuel Márquez,Zhibing Hu
出处
期刊:Langmuir
[American Chemical Society]
日期:2007-07-21
卷期号:23 (17): 8663-8666
被引量:117
摘要
Monodisperse microgels of P(MEO2MA-co-OEGMA) have been synthesized by using free radical polymerization. Microgels with a variety of particle radii ranging from 82 to 412 nm have been obtained with different surfactant concentrations. The particle size distribution is extremely narrow and even better than that for PNIPAM microgels. Pure MEO2MA microgels have an LCST of about 22 °C. The LCSTs corresponding to the molar ratio of OEGMA to MEO2MA at 10 and 20% are 31 and 37 °C, respectively. Microgels in water self-assemble into various phases, including a crystalline phase with iridescent colors, which are the result of Bragg diffraction from differently oriented crystalline planes. Considering that PEG is nontoxic and anti-immunogenic as proven by the FDA, thermoresponsive P(MEO2MA-co-OEGMA) microgels may have many exciting biomedical applications.
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