酸性硅溶胶的胶凝速度  

THE GELATION RATE OF ACIDIC SILICA SOL

作　　者：王金晞[1] 高宁[1] 朱卫华[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）》1990年第4期654-659,共6页Journal of Nanjing University（Natural Science）

基　　金：高等学校自然科学基金资助课题

摘　　要：本文用粘度法研究了酸性硅溶胶的胶凝速度。结果表明:含电解质浓度较高的酸性硅溶胶的胶凝速度明显受pH的影响。随着电解质浓度的减小,这种影响就减小。在电解质浓度很低时,酸性硅溶胶的胶凝速度很慢,pH对胶凝速度的影响很小,而且胶凝作用的活化能不受pH的影响。Using viscometry, the gelation rate of acidic silica sol has been studied. It is found that the gelation rate of acidic silica sol containing higher electrolyte levels is affected by pH. The concentration of electrolyte decreases with a decrease in the effect. At the lower con-centrations of electrolyte, the gelation rate of acidic silica sol is very slow and the effect of pH on the gelation rate is very small. Generally, the activation energy of gelation would not change with the pH.

关 键 词：硅溶胶 胶凝速度 二氧化硅 

分 类 号：O648.3[理学—物理化学]