This study was about the effect of pH and small molecule organic compound on the phase behavior of SDS/CTAB/H 2O mixture.The ATPS regions and LC regions were mainly discussed.It was shown that when the pH of the syste...This study was about the effect of pH and small molecule organic compound on the phase behavior of SDS/CTAB/H 2O mixture.The ATPS regions and LC regions were mainly discussed.It was shown that when the pH of the system was not neutral LC regions enlarged but ATPS regions reduced.In the condition of strong acid,the ATPS a region in which anionic surfactant in excess would extend to the SDS-H 2O axis of the pseudo phase diagram of SDS/CTAB/H 2O system.Small molecule organic compound that was not ionized in aqueous solution combined with water in the form of hydrogen bond.For this reason,the hydration of surfactant decrease and cationic surfactant and anionic surfactant integrate to form precipitate.So the surfactant-rich phase of ATPS showed milky white and the polarizing appearance was not clear.展开更多
为探究阴-阳离子表面活性剂复配微乳液体系驱油效果,研究了SDBS与DTAB的最佳摩尔比以及复配表面活性剂的总质量分数确定最佳微乳液配方,并将复配的微乳液体系与三元复合驱进行驱油效果对比,说明微乳液驱的驱油能力。实验结果表明,复配...为探究阴-阳离子表面活性剂复配微乳液体系驱油效果,研究了SDBS与DTAB的最佳摩尔比以及复配表面活性剂的总质量分数确定最佳微乳液配方,并将复配的微乳液体系与三元复合驱进行驱油效果对比,说明微乳液驱的驱油能力。实验结果表明,复配微乳液驱油体系最佳配方为:正辛烷5 m L,水5 m L,总质量分数为1.5%的SDBS与DTAB的摩尔比为1∶4,正丁醇的质量分数为4%,Na Cl的质量分数为5.2%。与水驱相比,微乳液驱采收率增幅为6.48%~7.56%;与三元复合驱相比,微乳液驱采收率增幅为0.06%~0.35%。展开更多
The physico-chemical properties of organized assemblies (micelle or vesicle ) from sodium alkylcarboxylate - alkyltrimethyl -ammonium bromide mixture have been investigated systematically. In different mixed cationic-...The physico-chemical properties of organized assemblies (micelle or vesicle ) from sodium alkylcarboxylate - alkyltrimethyl -ammonium bromide mixture have been investigated systematically. In different mixed cationic-anionic surfactant systems, micelles and vesicles can coexist or be transformed into each other on different conditions. The experimental results are explained prelimilarily from the viewpoint of molecular packing geometry. The solubilization of organic compound in the mixed surfactant system was also studied in detail.展开更多
文摘This study was about the effect of pH and small molecule organic compound on the phase behavior of SDS/CTAB/H 2O mixture.The ATPS regions and LC regions were mainly discussed.It was shown that when the pH of the system was not neutral LC regions enlarged but ATPS regions reduced.In the condition of strong acid,the ATPS a region in which anionic surfactant in excess would extend to the SDS-H 2O axis of the pseudo phase diagram of SDS/CTAB/H 2O system.Small molecule organic compound that was not ionized in aqueous solution combined with water in the form of hydrogen bond.For this reason,the hydration of surfactant decrease and cationic surfactant and anionic surfactant integrate to form precipitate.So the surfactant-rich phase of ATPS showed milky white and the polarizing appearance was not clear.
文摘为探究阴-阳离子表面活性剂复配微乳液体系驱油效果,研究了SDBS与DTAB的最佳摩尔比以及复配表面活性剂的总质量分数确定最佳微乳液配方,并将复配的微乳液体系与三元复合驱进行驱油效果对比,说明微乳液驱的驱油能力。实验结果表明,复配微乳液驱油体系最佳配方为:正辛烷5 m L,水5 m L,总质量分数为1.5%的SDBS与DTAB的摩尔比为1∶4,正丁醇的质量分数为4%,Na Cl的质量分数为5.2%。与水驱相比,微乳液驱采收率增幅为6.48%~7.56%;与三元复合驱相比,微乳液驱采收率增幅为0.06%~0.35%。
基金Project supported by the National Natural Science Foundation of China (Nos. 29992590-4, 29773004).
文摘The physico-chemical properties of organized assemblies (micelle or vesicle ) from sodium alkylcarboxylate - alkyltrimethyl -ammonium bromide mixture have been investigated systematically. In different mixed cationic-anionic surfactant systems, micelles and vesicles can coexist or be transformed into each other on different conditions. The experimental results are explained prelimilarily from the viewpoint of molecular packing geometry. The solubilization of organic compound in the mixed surfactant system was also studied in detail.
