Architecture of Colloidal Crystals Constructed by Silica Hybrid Nanoparticles

作者：Ishizu Koji^*; Tokuno Yoko; Lee Dong Hoon; Uchida Satoshi; Ozawa Masaaki

来源：Journal of Applied Polymer Science, 2011, 120(1): 43-49.

DOI：10.1002/app.31473

• silica particle
• atom transfer radical polymerization (ATRP)
• hyperbranched structure
• polymer brushes
• colloidal crystal

Silica (SiO(2))-crosslinked polystyrene (PS) particles possessing photofunctional N,N-diethyldithiocarbamate (DC) groups on their surface were prepared by the free-radical emulsion copolymerization of a mixture of SiO(2) (diameter D(n) = 192 nm), styrene, divinyl benzene, 4-vinylbenzyl N,N-diethyldithiocarbamate (VBDC), and 2-hydroxyethyl methacrylate with a radical initiator under UV irradiation. In this copolymerization, the inimer VBDC had the formation of a hyperbranched structure by a living radical mechanism. These particles had DC groups on their surface. Subsequently, poly(methyl methacrylate) brushes encapsulated SiO(2) particles were synthesized by the grafting from a photoinduced atom transfer radical polymerization (ATRP) approach of methyl methacrylate initiated by SiO(2)-crosslinked PS particles as a macroinitiator. We constructed the colloidal crystals using these photofunctional particles. Moreover, the SiO(2) particle array of colloidal crystals was locked by radical photopolymerization with vinyl monomer as a matrix.

• 出版日期2011-4-5