通过聚电解质聚丙烯酸铵（NH4PAA）和聚甲基丙烯酸铵（NH4PMAA）的合成与在Y－TZP粉体上的等温吸附实验及红外分析发现，悬浮微粒的表面状态由于聚电解质的吸附而得到改善；ζ电位测定表明，阴离子型分散剂使粉体的等电点（IEP）降低，浆料的流变性能也因为分散剂的加入而有了明显的改善．
Polyelectrolyte dispersants NH4PAA and NH4PMAA were synthesized by controlling proper reaction parameters.Isotherm adsorption and IR spectra of Y-TZP suspensions indicated that optimum content of dispersant was 2 wt% at pH 10. Surface structure was obviously affected by the absorbed polymer.The zeta potential and rheology of Y-TZP suspensions were investigated. Low viscosity Y-TZP suspensions with a solids loading of 47 vol% was obtained by adding NH4PAA as dispersant.
参考文献
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