Surfactant-free oil/water and bicontinuous microemulsion composed of benzene,ethanol and water  

作　　者：Fei Song Jie Xu Wan Guo Hou 

机构地区：[1]Key Laboratory for Colloid and Interface Chemistry of Education Ministry,Shandong University,Jinan 250100,China [2]College of Chemistry and Molecular Engineering,Qingdao University of Science and Technology,Qingdao 266042,China

出　　处：《Chinese Chemical Letters》2010年第7期880-883,共4页中国化学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.20953003);the Natural Science Foundation of Shandong Province of China(No.Z2008B08 and ZR2009BZ001);Taishan Scholar Foundation of Shandong Province of China(No.ts20070713).

摘　　要：Generally,a microemulsion consists of oil,water,surfactant and sometimes cosurfactant.Herein,we report a novel suffactant-free microemulsion（denoted as SFME） composed of benzene,water and ethanol without the amphiphilic molecular structure of traditional surfactant.The phase behavior of the ternary system was investigated,finding that there were a single-phase region and a two-phase region in ternary phase diagram.The electrical conductivity measurement was employed to investigate the microregion of the single-phase region,and a bicontinuous microregion and a benzene-in-water（O/W） microemulsion microregion were identified,which was confirmed by freeze-fracture transmission electron microscopy（FF-TEM） observations.The sizes of the microemulsion droplets are in the range of 20-50 nm.Generally,a microemulsion consists of oil,water,surfactant and sometimes cosurfactant.Herein,we report a novel suffactant-free microemulsion（denoted as SFME） composed of benzene,water and ethanol without the amphiphilic molecular structure of traditional surfactant.The phase behavior of the ternary system was investigated,finding that there were a single-phase region and a two-phase region in ternary phase diagram.The electrical conductivity measurement was employed to investigate the microregion of the single-phase region,and a bicontinuous microregion and a benzene-in-water（O/W） microemulsion microregion were identified,which was confirmed by freeze-fracture transmission electron microscopy（FF-TEM） observations.The sizes of the microemulsion droplets are in the range of 20-50 nm.

关 键 词：Surfactant-free microemulsion Phase behavior Conductivity FF-TEM 

分 类 号：O647.2[理学—物理化学] O648.23[理学—化学]