聚乙二醇在Triton X-114/正辛烷/正丁醇/水反相微乳液中的增溶研究  

The Study on the Solubilization of Poly Ethylene Oxide in Triton X - 114/ n - Octane/ n - Butanol/Water System

作　　者：侯震山[1] 李之平[1] 汪汉卿[2] 

机构地区：[1]中国科学院新疆化学研究所,乌鲁木齐830011 [2]中国科学院兰州化学物理研究所,兰州730000

出　　处：《化学学报》2000年第3期262-266,共5页Acta Chimica Sinica

基　　金：国家攀登计划(B)项目资助

摘　　要：研究了加入聚合物对Triton X-114/正辛烷/正丁醇/水组分体系相态的影响.利用次甲基蓝(MB)作为吸附探针,而以(口恶)唑烷氮氧自由基(5-doxyl stearic acid,5-DNS)作为自旋探针,研究了加入聚合物对TX-114/正辛烷/正丁醇/水反相微乳液的微结构影响.结果表明:聚合物添加使W/O微乳液区缩小,而液晶区则更靠近水一端(增溶更多水),该反相微乳液中存在三种状态水:结合水、束缚水、体相水.加入聚合物可以替代先前存在于TX-114聚氧乙烯链上的一些水分子,使其微极性减小,而且使表面活性剂分子在界面上的排列更为松散,本研究结果对探讨聚合物对W/O微乳液微结构的影响及此类体系在其它方面应用有重要意义.The effect of addition of polyethylene oxide (PEO)on the phase behavior of the TX - 114/n -octane/n - butanol/water system is reported. It has been found that the addition of PEO results in a decrease in the amount of solubilized water in W/O microemulsion region, and an increase in the amount of solubilized water in lamellar liquid crystalling phase. The W/O microemulsion has been studied by using methylene blue as an absorption probe and 5 - doxyl stearic acid (5 - DNS) as a spinning probe. The result clearly indicates that there are three types of water present in the polar core: bound water, which interacts directly with ethylene oxide chains of the surfactant; trapped water, which is located between the ethylene oxide groups, with high mobility; bulk - like water, which forms at high water contents. In the presence of PEO, the polymer molecules can replace some bound water or trapped water molecules, which leads to a looser arrangement of ethylene oxide groups of the surfactants at the interface. This structure may induce the formation of higher

关 键 词：TRITON X-114 聚乙二醇 水结构 反相微乳液 增溶 

分 类 号：O648[理学—物理化学]