pH-responsive behavior of hydrogel microspheres altered by layer-by-layer assembly of polyelectrolytes

被引：13

作者：

Fujii, Akihiro ^{[1
]}

Maruyama, Tatsuo ^{[1
]}

Sotani, Tomohiro ^{[1
]}

Ohmukai, Yoshikage ^{[1
]}

Matsuyama, Hideto ^{[1
]}

机构：

[1] Kobe Univ, Dept Sci & Chem Engn, Nada Ku, Kobe, Hyogo 6578501, Japan

来源：

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 2009年 / 337卷 / 1-3期

关键词：

Polyelectrolyte; Layer-by-layer; Hydrogel; pH-response; MULTILAYER MICROCAPSULES; MICROGELS; CAPSULES; MONODISPERSE; SYSTEM;

D O I：

10.1016/j.colsurfa.2008.12.015

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：

We used the layer-by-layer method and an anionic microgel as a substrate to study the influence of consecutive polyelectrolyte adsorption treatment on the pH-responsive changes in the size of the microgel. Treatments with poly(allylamine hydrochloride) and branched poly(ethyleneimine), which penetrated the microgel, led to the formation of a "complex shell" and the behavior analogous to that of an amphoteric microgel, respectively. In contrast, high molecular weight chitosan adsorbed almost at the edge of the microgel surface; and the resultant microgel maintained nearly the same pH-response as the original microgel. This study shows that the pH-response of the microgel can be controlled by the type of polyelectrolytes adsorbed. (c) 2008 Elsevier B.V. All rights reserved.

引用

页码：159 / 163

页数：5

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