Hybrid silica nanoparticles with hyperbranched polymer and polyelectrolyte shells
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- 作者：H. Mori ; D. Chan. Seng ; M. Zhang ; A. H. E. M眉ller
- 关键词：Hyperbranched polymer ; Hybrid nanoparticle ; Polyelectrolyte ; Self ; condensing vinyl polymerization ; Atom transfer radical polymerization
- 刊名：Progress in Colloid and Polymer Science
- 出版时间：2004
- 出版年：2004
- 期刊代码：107_0340-255X
- 类别：ch
- 卷：126
- 期：1
- 页码：p.40
- 数据来源：sp
摘要
We present the synthesis of hyperbranched polymer–silica hybrid nanoparticles by self-condensing vinyl polymerization (SCVP) via atom transfer radical polymerization (ATRP) from silica surfaces. ATRP initiators were covalently linked to the surface of silica particles, followed by SCVP of an initiator-monomer (inimer) which has both a polymerizable acrylic group and an initiating group in the same molecule. Well-defined polymer chains were grown from the surface to yield hybrid nanoparticles composed of silica cores and hyperbranched polymer shells having multifunctional bromoester end groups. Self-condensing vinyl copolymerization of the inimer and tert-butyl acrylate from the functionalized silica nanoparticles created branched poly(tert-butyl acrylate)–silica nanoparticles. Novel hybrid nanoparticles with branched polyelectrolytes, poly(acrylic acid)–silica, were obtained after hydrolysis of linear segments of the branched poly(tert-butyl acrylate).