聚丙烯酸对BaTiO_3颗粒的分散及其机理研究  

DISPERSION MECHANISM OF DISPERSANT PAA ON BaTiO_3

作　　者：罗遂斌[1] 庄志强[1] 刘勇[1] 林宙峰[1] 

机构地区：[1]华南理工大学材料科学与工程学院,广州510640

出　　处：《陶瓷学报》2008年第4期334-337,共4页Journal of Ceramics

摘　　要：通过沉降实验及FT-IR分析,研究了分散剂PAA对BaTiO3颗粒的分散机理。结果表明:PAA电离的RCOO-吸附在BaTiO3颗粒表面形成的Ba-OH+2正电中心,产生静电稳定作用和空间位阻作用,从而使BaTiO3颗粒分散。当PAA加入量为0.3wt%,pH=10时,PAA完全电离,吸附达饱和,可以得到高分散、高稳定的浆料。Dispersion mechanism of dispersant PAA on BaTiO3 was investigated by sedimentation analysis and FT-IR spectrum. The results show that anionic dispersants are mainly attracted by the positive electric centers of Ba-OH2^＋ on the surface of BaTiO3 particals in basic condition. BaTiO3 was dispersed by the static electricity stabilization and spatial steric hindrance function. When pH equals 10, the concentration of PAA is 0.3wt%, PAA is total ionization, the absorption comes up to saturation and stabilized BaTiO3 suspension can be obtained.

关 键 词：聚丙烯酸 BATIO3 分散 

分 类 号：TQ174.75[化学工程—陶瓷工业]