酯类微乳液的相变过程中电导率和黏度分析  

Analysis of Electrical Conductivity and Viscosity in Phase Inversion Process of Ester Microemulsion

作　　者：刘燕军[1,2,3] 刘鹏雷[1,2] 吴波[1,2] 郑帼[1,2,3] 邵建楠 

机构地区：[1]天津工业大学环境与化学工程学院,天津300387 [2]天津市纺织纤维界面处理技术工程中心,天津300270 [3]天津工业大学纺织助剂有限公司,天津300270

出　　处：《中国塑料》2016年第11期19-24,共6页China Plastics

基　　金：国家重点研发计划:建筑增强短切纤维;土工材料的制备机理及其服役与失效机理研究(2016YFB0303201)

摘　　要：以月桂酸聚氧乙烯和聚乙二醇二油酸酯为乳化剂,以油酸酯为油相,制备了不同乳化剂配比和不同油相含量的微乳液,研究了乳液浓度对其电导率和黏度的影响。结果表明,随着微乳液浓度的增大,乳液出现由水包油(O/W)型转变为油包水(W/O)型的相变过程;其伴随的电导率变化和黏度变化有着对应的关系:当电导率升高至平稳阶段对应于黏度的缓慢上升阶段,乳液属于O/W型;当电导率急剧下降阶段对应于黏度的突变阶段,乳液处于相转变(O/W和W/O共存)阶段;当电导率很低且缓慢下降阶段对应于黏度缓慢下降的阶段,乳液属于W/O型;此外,聚醚类化合物可明显降低乳液相转变过程的黏度,其中异构醇聚醚的效果最佳,在添加量为0.5%(质量分数,下同)时,黏度降低的程度最大。A series of microemulsions with various ester contents and emulsifier ratios were prepared by lauric acid polyoxyethylene esters and polyethylene oleic acid diester as emulsifiers and oleic acid ester as an oil phase, and the effect of emulsion concentration on the electrical conductivity and viscosity of the resulting microemulsions was investigated. The results indicated that these microemulsions exhibited a phase-inversion process from oil in water to water in oil with an increase of emulsion concentration. There is a correlation between the electrical conductivity and viscosity as follows： the increase of conductivity up to a stable stage corresponds to the slowly rising stage of viscosity, which results in an oil-in-water （O/W） microemulsion; the drastic decrease in conductivity corresponds tO the mutation stage of viscosity, which caused the coexistence of O/W and water-in-oil （W/O） microemulsions; the gradual decrease in conductivity from a low value corresponds to the slow decline stage of viscosity, which leads to a W/O microemulsion. In addition, the viscosity of microemulsions was significantly reduced by polyether-type surfactants in the phase inversion process, and the isomeric polyether alcohol exhibited an optimum reducing effectiveness for viscosity.

关 键 词：微乳液 相变 电导率 黏度 

分 类 号：O648.23[理学—物理化学]