胶体颗粒表面的双响应性聚合物刷

Double-responsive polymer brushes on the surface of colloid particles.

作者信息

Zhang Mingming, Liu Li, Zhao Hanying, Yang Yi, Fu Guoqi, He Binglin

机构信息

Key Laboratory of Functional Polymer Materials of Ministry of Education, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin 300071, People's Republic of China.

出版信息

J Colloid Interface Sci. 2006 Sep 1;301(1):85-91. doi: 10.1016/j.jcis.2006.05.004. Epub 2006 May 5.

DOI:10.1016/j.jcis.2006.05.004

PMID:16780862

Abstract

Well-defined poly(2-(dimethylamino)ethyl methacrylate) (PDMAEMA) brushes were synthesized on the surface of polystyrene latex particles by atom transfer radical polymerization (ATRP). It was found that the surface-initiated polymerization of DMAEMA catalyzed by CuCl/CuCl(2)/bpy was under good control in the solvent of acetone/water at ambient temperature (35 degrees C). High-density PDMAEMA brushes with low polydispersity (PDI 1.21) were obtained. TEM results demonstrate that the PDMAEMA-grafted particles have core-shell structure. Dynamic light scattering studies indicate that the particles with PDMAEMA brushes are both pH and temperature responsive.

摘要

通过原子转移自由基聚合（ATRP）在聚苯乙烯胶乳颗粒表面合成了结构明确的聚甲基丙烯酸2-（二甲氨基）乙酯（PDMAEMA）刷。发现在丙酮/水的溶剂中，于环境温度（35℃）下，由CuCl/CuCl₂/联吡啶催化的DMAEMA表面引发聚合反应得到了很好的控制。获得了具有低多分散性（PDI 1.21）的高密度PDMAEMA刷。透射电子显微镜（TEM）结果表明，接枝了PDMAEMA的颗粒具有核壳结构。动态光散射研究表明，带有PDMAEMA刷的颗粒对pH值和温度都有响应。