阴阳离子表面活性剂复配微乳液增溶性定量分析

Quantitative analysis of the solubilization property of cationic- anionic mixing surfactants microemulsion system

摘要:

摘要：利用Winsor相图及最佳增溶参数曲线对比了四种常见阴离子表面活性剂（十二烷基硫酸钠（SDS）、十二烷基磺酸钠（SLS）、十二烷基苯磺酸钠（SDBS）、乙氧基化烷基硫酸钠（AES））微乳液的增溶性能，增溶能力为SDBS＞AES＞SDS＞SLS。选取增溶能力较小的SDS、SLS分别和阳离子表面活性剂十八烷基三甲基氯化铵(OTAC)复配微乳液，当达到最优复配比时，SDS/OTAC、SLS/OTAC体系的最佳增溶参数（SP*）较SDS、SLS体系分别增加了150%、170%，最佳盐度（S*）分别减少了91%和95%。研究还发现，当温度在20～50℃间变化时，SDS-OTAC复配微乳体系的最佳增溶参数略微减小，最佳盐度稍微增加；温度超过50℃后，最佳增溶参数急剧减小，最佳盐度迅速增大。

Abstract:

Abstract：The Winsor phase diagram and the optimum solubilization parameter curves are used to compare the oil solubilization property among microemulsion systems of four kinds of common anionic surfactants, including sodium dodecyl sulfate (SDS), sodium lauryl sulfonate (SLS), sodium dodecyl benzene sulfonate(SDBS) and sodium alcohol ether sulphate (AES). The order of their solubilization ability is SDBS＞AES＞SDS＞SLS. Mixed surfactants of SDS-octadecyl trimethyl ammonium chloride (OTAC) and SLS-OTAC were used to forming microemulsion systems, respectively. When the optimal mixing ratio was reached, the optimum solubilization parameter(SP*) of SDS/OTAC and SLS/OTAC systems increased by 150% and 170% and the optimum salinity decreased by 91% and 95% respectively when compared with the single SDS and SLS microemulsion systems. It was also found that, when the temperature changes from 20℃ to 50℃, the optimum solubilization parameter of the SDS-OTAC microemulsion system reduced slightly and the optimum salinity only increased slightly. However, when the temperature exceeded 50℃, the optimum solubilization parameter decreased and the optimum salinity increased rapidly.