电导法研究水/十二烷基苯磺酸钠/正戊醇/正庚烷体系反向胶束和W/O型微乳液的导电机理  

CONDUCTOMETRY STUDIES ON THE CONDUCTIVE MECHANISM OF REVERSED M1CELLES AND W/O MICROEMULSIONS SYSTEM WATER/DDBS/n-PENTANOL/n-HEPTANE

作　　者：王文清[1] 顾国兴[1] 

机构地区：[1]北京大学技术物理系,北京100871

出　　处：《铀矿冶》1997年第4期252-258,共7页Uranium Mining and Metallurgy

摘　　要：本文用电导法研究水／十二烷基苯磷酸钠（DDBS）／正成醇／正庚烷体系反向改束和W／O型微乳液的导电机理。相行为和电导测量表明，水／DDBS／正成醇／正庚烷体系有奇特电导率渗透现象，其渗透界限比理论预测值（1／3）高出许多，可认为该体系是非渗透型与渗透型的结合。电导率受界面层的刚性、渗透性、各种粒子的迁移速率影响较大，特别是表面活性剂离子和反离子的影响更为突出，只要其中之一保持低值，渗透现象就不会发生。Conductive mechanism of system water/sodium dodecylbenzene sulfonate (DDBS)/n pentanol/n-heptane have been studied using conductometry method- The results of phase and conductive behaviors show that the system has an intrinsic electrical percolation phenoqenon. The water induced percolation threshold alters over a wide range and is higher - than theoretical predicative value of below 1/3, which seems a combination type of a nonpercolation system and a percolation system. The coductivity is strongly influenced by rigidity,permeability of monolayer and migration rates of particles. The percolation does not occur as long as either the migration rate of surfactant ions or that of the counterions keeps low value.

关 键 词：反向胶束 W/O型微乳液 导电机理 DDBS 萃取剂 

分 类 号：TL212.32[核科学技术—核燃料循环与材料] TF804.2[冶金工程—有色金属冶金]