Role of double-hydrophilic block copolymers in the synthesis of lanthanum-based nanoparticles

被引：55
作者：
Bouyer, F
Gérardin, C [1 ]
Fajula, F
Putaux, JL
Chopin, T
机构：
[1] ENSCM, CNRS, UMR 5618, Lab Mat Catalyt & Catalyse Chim Organ, Montpellier, France
[2] Univ Grenoble 1, CNRS, Ctr Rech Macromol Vegetales, Grenoble, France
[3] RHODIA Aubervilliers, Ctr Rech, Aubervilliers, France
来源：
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 2003年 / 217卷 / 1-3期
关键词：
hydrophilic block copolymer; lanthanum; nanoparticles; complexation; micelles; SANS;
D O I：
10.1016/S0927-7757(02)00574-5
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：
The formation of nanosized lanthanum hydroxide particles in aqueous medium was studied in the presence of double-hydrophilic block copolymers (DHBC). These copolymers contain a polyacrylic acid (PAA) block as an ionizable block, and a polyacrylamide (PAM) or a polyhydroxyethylacrylate (PHEA) block as a neutral block. The nanoparticles are synthesized by a two-step procedure. Firstly, the complexation of lanthanum ions in water by the polyacrylate blocks induced the formation of star-shaped micelles stabilized by the PAM or PHEA blocks. The micelles were characterized by dynamic light scattering (DLS), small-angle neutron scattering (SANS) and transmission electron microscopy (TEM). Secondly, the inorganic polycondensation of lanthanum ions led to the formation of organic-inorganic nanohybrids. Hairy needle-like colloids were obtained. The size of the sterically stabilized colloids was controlled by adjusting the polymer-to-metal ratio. (C) 2002 Elsevier Science B.V. All rights reserved.
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页码：179 / 184
页数：6
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