Park Jun Kwon, Ryu Jae Chun, Kim Won Kyoung, Kang Kwan Hyoung
Department of Mechanical Engineering, Pohang University of Science and Technology, San 31, Hyoja-dong, Pohang 790-784, South Korea.
J Phys Chem B. 2009 Sep 10;113(36):12271-6. doi: 10.1021/jp9015189.
To understand the dynamics of dielectric-liquid-based colloidal systems, the effect of electric field on conductivity of dielectric liquids must be characterized. We measured dc conductivity of dielectric liquids mixed with polar additives, including surfactants, an alcohol, and an oil-soluble salt. The conductivities of the mixtures increased with the electric field and concentration of polar additives and were also affected by temperature. Conductivity increased with electric-field strength at very similar rates, almost irrespective of the kind of mixture. A simple formula derived from Onsager theory predicted the electrical conductivity under electric field fairly well.
为了理解基于介电液体的胶体系统的动力学，必须表征电场对介电液体电导率的影响。我们测量了与极性添加剂（包括表面活性剂、一种醇和一种油溶性盐）混合的介电液体的直流电导率。混合物的电导率随电场和极性添加剂浓度的增加而增加，并且也受温度影响。几乎与混合物种类无关，电导率随电场强度以非常相似的速率增加。从昂萨格理论推导的一个简单公式能较好地预测电场下的电导率。
