【摘要】 研究了不同浓度硅溶胶的黏度性质。在硅溶胶中添加不同种类的表面活性剂,利用黏度法研究了表面活性剂对硅溶胶黏度性质的影响,发现加入3种不同表面活性剂后,硅溶胶的黏度都出现了不同程度的下降,其中以添加十二烷基苯磺酸钠(SDBS)的降黏作用最明显,添加乳化剂OP-10和十二烷基硫酸钠(SDS)的次之。表面活性剂的降黏作用机理推测为SDBS在硅溶胶颗粒上的包覆作用。SDBS的降黏作用与其浓度有关,表现为临界胶束浓度规律,临界浓度约为4.6×10-3mol/L。更多还原

【Abstract】 Viscosity properties of silica sol with different concentrations were investigated.Effects of adding different surfactants into silica sol on its viscosity properties were studied by means of viscosity method.It was found that direct addition of three surfactants all resulted in reduction of viscosity in various degree,of which sodium dodecylbenzenesul fonate(SDBS)is more effective than emulsifier OP-10 and sodium dodecyl sulfate(SDS).It was speculated that the mechanism of viscosity reduction relied on the covering process of SDBS on the colloidal particles.Effect of concentration on the viscosity reduction of SDBS behaved as critical micelle concentration rule,and critical concentration was about 4.6×10-3 mol/L.更多还原