SDS/BA/H_2O体系的结构与电学特性  

Structure and Electric Properties of SDS/BA/H_2O System

作　　者：刘天晴[1] 张启清[1] 范国康[1] 郭荣[1] 

机构地区：[1]扬州大学理学院化学系,扬州225002

出　　处：《化学学报》2000年第7期840-844,共5页Acta Chimica Sinica

基　　金：国家自然科学基金(29733110)资助项目

摘　　要：SDS/BA/H_2O体系电导率、反离子缔合度和电容测定表明:在O/W微乳液区域,电导率、反离子缔合度和电容值都较小;在恒定m(SDS)/m(H_2O)下,随着BA含量的增加,电导率、反离子缔合度和电容值先增加,达到一最大值后又逐渐下降.在双连续区域,为链式导电机理,电导率、反离子缔合度、电阻和电容值几乎不随水含量变化.根据加权最小二乘法回归,O/W球形胶束区域的电容值与各物理化学特性数值(κ,β,N,D,ε,χ)的关系为:C/μF=1.036×10^(-8)(1-β)Z_sκD^(-1)+0.03466ε_1χ_1-0.09677ε_2χ_2.The results of determination of the conductivity, the association degree of counter - ion and the capacitance indicate that their values are relatively small in the O/W microemulsion for SDS/BA/H2O system. At the constant weight ratio of SDS to water, the conductivity, the association degree of counter- ion and the capacitance first increase up to the maximum and then begin to decrease with BA content increasing. In the bicontinuous region, there is a chain conductive mechanism. The conductivity, the association degree and the capacitance change scarcely with the water content. The relation of the capacitance with the properties of physical chemistry in O/W spherical microemulsion region by a least - mean square method is C/μF = 1.036×10-8(1-β)ZskD-1 +0.03466ε1,x1 -0.09677ε2x2.

关 键 词：SDS BA 微乳液 结构特性 电学特性 表面活性剂 

分 类 号：O648[理学—物理化学]