Hierarchical Self-Assembly of Polyhedral Oligomeric Silsesquioxane End-Capped Stimuli-Responsive Polymer: From Single Micelle to Complex Micelle

被引：72
作者：
Ma, Li [1 ,3 ]
Geng, Haiping [3 ]
Song, Jiangxuan [3 ]
Li, Jinze [2 ,3 ]
Chen, Guangxin [1 ,3 ]
Li, Qifang [1 ,3 ]
机构：
[1] Beijing Univ Chem Technol, State Key Lab Chem Resource Engn, Beijing 100029, Peoples R China
[2] Key Lab Preparat & Proc Novel Polymer Mat Beijing, Beijing 100029, Peoples R China
[3] Beijing Univ Chem Technol, Coll Mat Sci & Engn, Beijing 100029, Peoples R China
来源：
JOURNAL OF PHYSICAL CHEMISTRY B | 2011年 / 115卷 / 36期
基金：
中国国家自然科学基金;
关键词：
AMPHIPHILIC DIBLOCK COPOLYMERS; RAFT POLYMERIZATION; AQUEOUS-SOLUTION; BLOCK-COPOLYMER; ATRP; TEMPERATURE; BEHAVIOR; CORE; POLY(N-ISOPROPYLACRYLAMIDE); METHACRYLATE);
D O I：
10.1021/jp203782g
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：
Responsive polymeric micelles have been widely studied because of their potential use in nanocontainers and nanocarriers. In this study, polyhedral oligomeric silsesquioxane (POSS) end-capped poly[2-(dimethylamino)ethyl methacrylate] (POSS-PDMAEMA), a stimuli-responsive organic-inorganic hybrid polymer, was synthesized via atom transfer radical polymerization (ATRP) using POSS-Br as a macroinitiator. The self-assembly behaviors of POSS-PDMAEMA in aqueous solution were studied by fluorescence probe, transmission electron microscopy (TEM), dynamic light scattering (DLS), high-resolution transmission electron microscopy (HRTEM), and X-ray diffraction (XRD). The results revealed two self-assembly processes of POSS-PDMAEMA. First they self-assembled into a single micelle with the POSS molecules forming a crystal core and the PDMAEMA chains stretching as a corona. Then the single micelles, as building blocks, were able to reversibly form a hierarchical micelle-on-micelle structure (complex micelle) under external stimuli.
引用
收藏
页码：10586 / 10591
页数：6
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