摘要
超细粉体具有极高的比表面能而难于在水介质中稳定分散。具有锚固基团和溶剂化链结构组成的超分散剂能显著降低体系的总表面能,因而可用于分散超细粉体。文章概述了超细粉体在水介质中的分散机理、双电层理论和空间位阻理论,以及颗粒分散动力学稳定性的影响因素如分子组成结构、pH和分散剂用量。重点介绍了水性超分散剂的种类包括聚羧酸型、聚马来酸酐型和聚磺酸型等及其合成方法。
It is dificult for urtrafine powder to be dispersed in waterborn system owing to its high specific sur- face energy. However, hyper- dispersant, containing anchoring group and solvate chain structure, could be used in dispersing uhrafine powder through reducing the total surface energy of system rapidly. The mechanism of dispersion and stabilization of uhrafine powder in water, such as double - layer and steric repellence, and the influencing factors on dispersion kinetics, such as molecular composition, pH value and dosage of dispersant. Particularly, the types of hyper -dispersant, for instance, the polycarboxylate, the poly maleic anhydride and the poly- sulfonate and the synthetic methods of hyper - dispersant associated were summarized in detail.
出处
《涂料工业》
CAS
CSCD
北大核心
2011年第5期74-79,共6页
Paint & Coatings Industry
关键词
超分散剂
超细粉体
分散
水介质
hyper - dispersant
uhrafine powder
dispersion
water medium
作者简介
郑仕远（1964-），男，副教授，研究方向为精细石油化学品合成。
