ZIRCONIUM COMPOUNDS AS COATINGS ON POLYSTYRENE LATEX AND AS HOLLOW SPHERES

被引:65
作者
KAWAHASHI, N
PERSSON, C
MATIJEVIC, E
机构
[1] CLARKSON UNIV,DEPT CHEM,POTSDAM,NY 13699
[2] CHUST PROGRAM,STOCKHOLM,SWEDEN
关键词
COATED PARTICLE; COLLOID; LATEX; ZIRCONIUM;
D O I
10.1039/jm9910100577
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
Cationic and anionic polystyrene latices have been coated with uniform layers of zirconium compounds by ageing, at elevated temperatures, dispersions of the polymer colloid in the presence of aqueous solutions of zirconium sulphate, formamide, urea, and poly(vinylpyrrolidone). The thicknes of the desposited layers could be altered by suitable adjustment of the reactant concentrations. It is suggested that the mechanism for the formation of the coating shell is based on heterocoagulation between the latex and in situ precipitated inorganic particles. Hollow colloidal spheres of zirconium compounds were obtained by calcination of the so-coated polystyrene latices at elevated temperatures in air.
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页码:577 / 582
页数:6
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