物理化学学报 >> 2001, Vol. 17 >> Issue (06): 484-487.doi: 10.3866/PKU.WHXB20010602

研究论文 上一篇    下一篇

平板型高电位胶粒双电层的相互作用

罗根祥;金军;王好平   

  1. 抚顺石油学院材料科学系,抚顺 113001
  • 收稿日期:2000-10-31 修回日期:2000-12-22 发布日期:2001-06-15
  • 通讯作者: 王好平 E-mail:wanghaoping@ihw.com.cn

Double Layer Interaction between Parallel Plates with High Surface Potential

Luo Gen-Xiang;Jin Jun;Wang Hao-Ping   

  1. Department of Materials Science,Fushun Petroleum Institute,Fushun 113001
  • Received:2000-10-31 Revised:2000-12-22 Published:2001-06-15
  • Contact: Wang Hao-Ping E-mail:wanghaoping@ihw.com.cn

摘要: 利用线性迭加法,提出了平行平板型高电位颗粒之间的弱相互作用的近似表达式.结合文献[3]给出的强相互作用表达式,对高电位平行平板型颗粒的相互作用给出了完整的描述,和精确数值解吻合相当好.强弱相互作用的接合点在κh=4,误差在接合点处最大,~10%.根据Derjaguin法和改进的Derjaguin法,求出了高电位球颗粒在恒电位条件下的相互作用能.

关键词: 胶体, 高表面电位, Derjaguin法

Abstract: A simple method of calculating the interaction force and energy per unit area between two dissimilar plates with high potentials at constant surface potentials has been presented in Ref.[3],in which strong interaction of plates with high potentials was discussed. Using linear superposition,approximate expressions have been derived for weak repulsive interaction energy and force between parallel plates with high surface potential.Combining the results of Ref.[3], the double layer repulsive interaction between parallel plates with high surface potential has been integrally generalized.Juncture of strong and weak interaction is at κh=4,and the relative error is largest at this point,~10%.Good agreementof the present results with the exact numerical results calculated by the computer is found over a wider range of the plate separation.Using Derjaguin's method and the improved Derjaguin's method the expressions of the interaction free energy between two dissimilar spheres with high surface potentials have also been derived.However,the range of application of the equations of interaction energy for the spheres are narrower than that of the plates.

Key words: Colloid, High surface potential, Derjaguin′s method