文档介绍：TiO2颜料在水溶剂中的
分散性研究
摘要
钛白粉广泛用于涂料、塑料、造纸、油墨、色浆、橡胶等领域。为了获得优异的颜料应用性能,在钛白粉生产的后期必须进行包膜处理。而对钛白粉进行分散是包膜的前序工作。在水溶剂中的分散性对包膜的程度有着重要的影响。本实验从分析钛白粉体在水中的分散行为入手,研究了分散剂种类、分散剂加入数量和分散剂加入方式的最优化参数以及pH值对分散的影响,并且提出了不同的分散剂协同作用对钛白进行表面处理的方案,对获得符合要求的TiO2颗粒分散性具有重要意义。
在高速分散机中于分散前加入六偏磷酸钠、三聚磷酸钠、聚乙二醇、三羟甲基丙烷作为分散剂对钛白进行分散,%、%、%、%、%、%、%(ω),获得了三聚磷酸钠分散性最佳,%(ω)的加量最好的结论。%(ω)的四种分散剂,调节pH值到10后加入到高速分散机中对钛白进行分散。对上述两种有机分散剂和两种无机分散剂按固定值进行1:1比例混合后对钛白进行分散,获得了三聚磷酸钠与三羟甲基丙烷的复合组合的分散性较好,但是和其他差别不大的结论。%(ω)的三聚磷酸钠作分散剂,分别在分散前加入、分散中加入和分散后加入钛白初品中打浆分散,获得了分散前加入方式的分散性最好的结论。
关键词:钛白,水分散性,沉降,复合
ABSTRACT
Titanium dioxide is used widely in the coatings, plastics, paper, ink, color paste, rubber, and other fields. In order to obtain excellent paint application performance, in the latter part of the production of titanium white envelope must be dealt with. And a decentralization of titanium white envelope is the first sequence of work. Solvents in the water in the dispersion of the extent of the capsule have an important impact. This study from the analysis of titanium white in the dispersion of the water start to study the spread of species, by adding the number of dispersed and decentralized way of adding the optimization parameters and pH on the impact of decentralization, and made a different dispersant synergies Titanium dioxide on a surface treatment programmer, was to meet the requirements of the TiO2 particle dispersion of great significance.
Scattered in the high-speed machine in the pre-accession scattered six partial sodium phosphate, sodium tripolyphosphate, polyethylene glycol, trimethylolpropane of titanium dioxide as a dispersant to spread. Dispersant by adding volume to %, %, %, %, %, %, %(ω), was the STPP dispersion of the best, and the (ω) percent volume was the best conclusion. Fixed value of % (ω) for the four dispersing agent, after adjusting the pH value to 10, adding to the rapid spread of a scattered in the titanium dioxide. T