Electrostatic Interaction between Two Axisymmetric Spheroidal Colloidal Particles

• Main Authors: Lee, Jung-Jye, 李榮杰
• Other Authors: Eric K.C. Lee
• Format: Others
• Language: zh-TW
• Published: 1998
• Online Access: http://ndltd.ncl.edu.tw/handle/78212192464009298414

碩士 === 國立臺灣大學 === 化學工程學系研究所 === 86 === In present study, the electrostatic interactions between two axisymmetric spheroidal colloidal particles in 1:1 electrolyte solution are evaluated. Gale rkin finite element method combined with Newton-Raphson iteration scheme is ch osen to solve the Poisson-Boltzmann equation describing the electrical potenti al distribution of the system under consideration. A matrices solver based on the frontal method is adopted to accelerate the numerical procedure. The resul ts obtained are used to estimate the electrical interaction force and energy b etween two particles. The van der Walls interaction energy is evaluated by Gau ss quadrature, and the variation of the total interaction energy is a function of the closest approach between two particles. We can understand the behavior of charged particles and stability of colloid suspension. In present study, w e compare the dimensionless electrostatic interaction force of two spherical p articles with four approximation methods: Debye-Huckel approximation, Deryagui n approximation, modified HHF approximation, and linear superposition approxim ation, and extend the calculations to the electrostatic interaction in mutual coagulation and asymmetric electrolyte solution.