表面活性剂对二氧化硅溶胶的降粘作用及其机理研究

he viscosity property of variety concentration alkaline silica colloids and character of double electrode layer were investigated. Effects of surfactants on silica colloids viscosity was studied, it shows that direct addition of surfactants resulted in reduction of viscosity, SDBS is effective than op-10 and SDS. It was speculated that the mechanism of viscosity reduction was relied on the covering process of SDBS on the colloids particle. The effect of concentration on the viscosity reduction of SDBS behaved as critical micelle concentration rule, and critical concentration is about 4.6別10-3 mol/L.