高等学校化学学报 ›› 1996, Vol. 17 ›› Issue (3): 467.

• 研究简报 • 上一篇    下一篇

中等电位条件下的平板型双电层相互作用近似表达式

王好平1, 金军2   

  1. 1. 抚顺石油学院材料科学与技术研究所, 抚顺 113001;
    2. 北京攀尼尔精细化工·贸易公司
  • 收稿日期:1995-04-24 出版日期:1996-03-24 发布日期:1996-03-24
  • 通讯作者: 王好平,男,53岁,教授
  • 作者简介:王好平,男,53岁,教授

Approximate Analytic Expressions for Interaction of Plane-Parallel Double Layers at Moderate Potential

WANG Hao-Ping1, JIN Jun2   

  1. 1. The Materials Sci.&Tech., Research Institute, Fushun Petroleum Institute, Fushun 113001;
    2. Beijing Pioneer Refine Chem.-Eng.& Trade Co.
  • Received:1995-04-24 Online:1996-03-24 Published:1996-03-24

关键词: 排斥能, 平板胶粒, 双电层, DLVO理论

Abstract: According to the suggestion of Sader et al.,who replaced the reduced surface potential Y=eψ/KTby the effective reduced surface potential Y(h)=4ekh/2·tanh-1[ekh/2·tanh (Y/4)](where ψis the surface potential of particles,k is Boltzmann's constant,Tis absolute temperature,h is the distance of closet approach between the particles,e is the proton charge,k is the Debye screening parameter),we return to the double layer interaction at moderate potential under the constant surface potential,and using improved Derjaguin method we derive formulae for the interaction energy between the two parallel plates,valid up to the moderate to high potential regime.Agreement with the exact numerical values of the interaction of idential or dissimilar plates is considerably improved for the moderate surface potential.

Key words: Repulsion energy, Plane colloid particles, Electrical double layers, DLVO theory

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