Feng Ze, Lin Li, Yan Zeng, Yu Yanlei
Department of Materials Science, Fudan University, 220 Handan Road, Shanghai 200433, P. R. China.
Macromol Rapid Commun. 2010 Apr 6;31(7):640-4. doi: 10.1002/marc.200900777. Epub 2010 Jan 25.
A novel amphiphilic diblock copolymer composed of a hydrophilic poly(ethylene oxide) block and a hydrophobic block copolymerized by azobenzene-containing methacrylate and N-isopropylacrylamide was synthesized using ATRP. The polymer micelles showed dual responsiveness to heat and light. The size of the micelles was dependent on temperature and the encapsulated substance in the hydrophobic cores was released during heating and cooling processes. The hydrophobicity of the micellar cores appeared as a reversible change in response to light with neither disruption of the micelles nor leakage of the encapsulated substance while H-aggregation of the azobenzene moieties was detected.
通过原子转移自由基聚合（ATRP）合成了一种新型两亲性二嵌段共聚物，该共聚物由亲水性聚环氧乙烷嵌段和通过含偶氮苯的甲基丙烯酸酯与N-异丙基丙烯酰胺共聚得到的疏水性嵌段组成。聚合物胶束对热和光具有双重响应性。胶束的尺寸取决于温度，并且在加热和冷却过程中，疏水性核中包封的物质会释放出来。在检测到偶氮苯部分发生H聚集时，胶束核的疏水性会随着光发生可逆变化，而胶束不会破坏，包封的物质也不会泄漏。
