摘要：高分子聚合物PVP在SiO₂ 胶体颗粒上的吸附将直接影响胶体的稳定性质 ,其中最重要的包括Zeta电位、吸附层厚度等。从温度、pH值、聚合物浓度以及电解质浓度 4个方面考察了以上两方面的变化 ,初步探索了胶体表面Zeta电位变化的一般规律 ,并用电位法计算了胶体表面的吸附层厚度

关键词：高分子PVP；Zeta电位；吸附层厚度

Abstract：The adsorption of polyvinylpyrroidone(PVP)on SiO ₂ particles can affect the stability of silica suspension through ζ potential,adsorption layer thickness and so on.A thoroughly investigation of these factors has been carried out from temperature T,pH values,polymer concentration,electrolyte concentration and molecular weight of adsorbed polymer.The adsorption layer thickness is calculated from ζ potential through the correlation based on stern electric double-layer theory.The variation the of ζ potential and adsorption layer thickness under different conditions is thus obtained.

Keywords：adsorption; polymers; stability; potential