超临界二氧化碳微乳液增溶多元醇特性  

Solubilization of Polyalcohol in Supercritical CO_2 Microemulsion

作　　者：周丹[1] 喻文[1] 徐琴琴[1] 银建中[1] 

机构地区：[1]大连理工大学化工机械学院,精细化工国家重点实验室,辽宁大连116024

出　　处：《物理化学学报》2011年第6期1300-1304,共5页Acta Physico-Chimica Sinica

基　　金：国家自然科学基金(20976028)资助项目~~

摘　　要：用2.5%、5.0%和7.5%(w)的1,3-丙二醇(1,3-PDO)稀水溶液为模型物质,以超临界二氧化碳为连续相,以琥珀酸二酯磺酸钠(AOT)为表面活性剂,乙醇为助剂,在压力为6.9-10.3MPa的范围内,温度为30-50°C时,分别对三种AOT浓度下的四元体系AOT/CO2/乙醇/水和五元体系AOT/CO2/乙醇/1,3-PDO/水的热力学行为进行了实验研究.实验结果证明:通过合理调控系统的操作条件,可以形成热力学稳定的超临界二氧化碳微乳液,并能实现选择性增溶1,3-丙二醇.该结果可为指导工业生产提供依据.We mainly investigated the phase behavior of the AOT （sodium bis-（2-ethylhexyl） sulfosuccinate/CO2/ethanol/water quaternary system and the AOT/CO2/ethanol/1,3-propanediol （1,3-PDO）/water quinary system at 30-50 °C and at pressures of 6.9-10.3 MPa. AOT was used as the surfactant and ethanol was used as the cosolvent at 1,3-PDO concentrations of 2.5%, 5.0%, and 7.5%（w）. This result shows that a thermodynamically stable microemulsion can be formed by controlling the operating pressures and temperatures. Subsequently, the selective extraction of 1,3-PDO from the aqueous solution can be controlled using appropriate temperatures and pressures, which is useful for the practical application of this technique in industry.

关 键 词：超临界二氧化碳微乳液 琥珀酸二酯磺酸钠 1 3-丙二醇 相行为 增溶特性 

分 类 号：O648.2[理学—物理化学]