微乳液和混合表面活性剂对甲苯的增溶作用

以Tween系列非离子型表面活性剂及助表面活性剂组成的混合表面活性剂溶液作为增溶试剂,增溶吸收难溶有机物甲苯。结果表明,当表面活性剂浓度大于临界胶束浓度(CMC)时增溶效果显著,甲苯的表观溶解度与表面活性剂浓度呈线性关系,且随着表面活性剂浓度的增加而增大,增溶曲线在CMC处出现折点;微乳液较单一表面活性剂溶液对挥发性有机物甲苯的增溶能力更强,增溶比更大;添加助表面活性剂可以不同程度的提高表面活性剂溶液的增溶能力,其规律为:正丁胺正丁醇正丁酸;温度对微乳液及混合表面活性剂溶液的增溶作用有很大的影响,且低温条件更有利于增溶吸收挥发性有机物甲苯。非离子型微乳液是一种良好的增效试剂,在挥发性有机废气污染治理中具有较好的应用前景。

Solubilization Absorption of Toluene with Mixed Surfactants and nicroemulsions

Nonionic surfactants mixed with cosurfactants were used as solubilizer for solubilization absorption of toluene. Results showed that surfactant solutions have remarkable solubilization ability when the concentration of surfactants were above critical micelle concentration (CMC),the apparent solubility of solutions were proportional to the concentration of Tween-20,with the increase of concentration of Tween-20 the apparent solubility of toluene was enlarged accordingly,and solubilization curve obviously changed at CMC point. The solubilization of microemulsions was superior to surfactant solutions,and the value of WSR was increased,the efficiency of cosurfactants for improving toluene solubilization capacity follows the order of n-butylamine,butanol and butyric acid. Temperature could significant affect the solubilization action of toluene by microemulsion,furthermore,the lower temperature enhanced the solubilization action. Nonionic microemulsions have remarkable solubilization absorption of toluene,which have great prospect in air pollution treatment.