From heterocoagulated colloids to core-shell particles

被引：33
|
作者：
Li, H [1 ]
Han, J [1 ]
Panioukhine, A [1 ]
Kumacheva, E [1 ]
机构：
[1] Univ Toronto, Dept Chem, Toronto, ON M5S 3H6, Canada
来源：
JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2002年 / 255卷 / 01期
基金：
加拿大自然科学与工程研究理事会;
关键词：
polymer colloids; heterocoagulation; core-shell particles; conductive polymers; silica; titanyl sulfate; spreading;
D O I：
10.1006/jcis.2002.8632
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：
Heterocoagulation of large and small oppositely charged colloid particles, accompanied by spreading of small beads over the surface of large spheres, offers a promising alternative to synthesis of core-shell particles via interfacial polymerization. In this paper, conditions required for complete spreading of the shell-forming polymer over the surface of the core-forming material (CFM) are predicted in terms of a critical distance, x(cr), between the small particles on the surface of the CFM. The theoretical value of x(cr) is tested in experiments conducted for polypyrrole/polyacrylic and silica-titanyl sulfate/polyacrylic heterocoagulate units. (C) 2002 Elsevier Science (USA).
引用
收藏
页码：119 / 128
页数：10
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