Oligo(ethylene glycol)-Based Thermoresponsive Core-Shell Microgels

被引：49
|
作者：
Chi, Chenglin [1 ]
Cai, Tong [1 ]
Hu, Zhibing [1 ]
机构：
[1] Univ N Texas, Dept Phys, Denton, TX 76203 USA
来源：
LANGMUIR | 2009年 / 25卷 / 06期
基金：
美国国家科学基金会;
关键词：
BLOCK-COPOLYMERS; 2-(2-METHOXYETHOXY)ETHYL METHACRYLATE; ANIONIC POLYMERIZATIONS; ETHER METHACRYLATES; COLLOIDAL CRYSTALS; WATER; PARTICLES; SURFACES; SEGREGATION; HYDROGELS;
D O I：
10.1021/la803866z
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Oligo(ethylene glycol)-based thermoresponsive core-shell microgels were synthesized by a two-step polymerization method: The core particles mainly consisted of poly(ethylene glycol) ethyl ether methacrylate (PEGEEMA), while the shell mainly consisted of a copolymer of PEGEEMA, poly(ethylene glycol) methyl ether methacrylate (PEGMEMA), and poly(acrylic acid). The copolymerization of the shell resulted in a higher volume phase transition temperature than that of the core. The mass of a single microgel particle was determined by both the static light scattering method and a new method using UV-visible spectroscopy. Core-shell microgels in water self-assembled into crystalline structures with iridescent colors, which were the result of Bragg diffraction. The melting kinetics of microgel crystals was studied by using UV-visible transmission spectroscopy.
引用
收藏
页码：3814 / 3819
页数：6
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