Suspensions of silica particles grafted with concentrated polymer brush: A new family of colloidal crystals

被引：140

作者：

Ohno, K ^{[1
]}

Morinaga, T ^{[1
]}

Takeno, S ^{[1
]}

Tsujii, Y ^{[1
]}

Fukuda, T ^{[1
]}

机构：

[1] Kyoto Univ, Chem Res Inst, Uji, Kyoto 6110011, Japan

来源：

MACROMOLECULES | 2006年 / 39卷 / 03期

关键词：

D O I：

10.1021/ma0521708

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

A colloidal crystal was newly identified for a liquid suspension of the hybrid particles having a spherical silica core and a shell of well-defined poly(methyl methacrylate) "concentrated brush". With increasing particle concentration, the suspension progressed from a (disordered) fluid to a fully crystallized system, going through a narrow crystal/fluid coexisting regime. The crystal had a face-centered cubic structure with a surprisingly large nearest-neighbor interparticle distance, suggesting that the graft chains, highly extended due to the "concentrated brush effect", exerted a long-range steric interaction. This type of colloidal crystal is new with respect to the origin of long-range interparticle potential and the controllability of many of the system parameters.

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收藏

页码：1245 / 1249

页数：5

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