电解质浓度对硅溶胶胶凝速度的影响  

THE EFFECT OF ELECTROLYTIC CONCENTRATION ON GELLING RATE OF SILICA SOLS

作　　者：王金晞[1] 毛延[1] 柳海澄[1] 陈荣三[1] 

机构地区：[1]南京大学配位化学研究所

出　　处：《南京大学学报（自然科学版）》1992年第2期250-254,共5页Journal of Nanjing University（Natural Science）

基　　金：国家自然科学基金资助课题

摘　　要：本文用胶凝法和粘度法研究了电解质对硅溶胶胶凝作用的影响,发现pH恒定时,硅溶胶胶凝速度的对数和其中电解质浓度的对数成正比,其比例系数随pH(>1.6)增加而增加。这种现象与DLVO理论所描述的电解质浓度对胶体稳定性影响的结论基本相符。In the present paper, the effect of electrolytic concentration on the gelling rate of silica sols has been studied by the method of gelation curve and viscosimetry. It is found that the logarithm of gelling rate of silica sols has a linear relationship with electrolytic concentration at a constant pH, the ratio increasing with the increase of pH(>1.6). These phenomena are in agreement with the effect of electrolytic concentration on the stability of colloid solutions as descrlbed by the DLVO theory.

关 键 词：电解质 硅溶胶 胶凝速度 DLVO理论 

分 类 号：O648.16[理学—物理化学]