| Summary: | 碩士 === 國立臺灣大學 === 化學工程學研究所 === 88 === The electrostatic interaction between two rigid infinitely long geometrically parallel cylinders each coated with an ion-penetrable membrane immersed in an oil/water interface is investigated. The effects of contact angle, cationic valence, cylinder radius and membrane thickness on the electrostatic force are analyzed in the present study. The contribution of electrostatic force comes from water phase and oil phase. The portion of cylinders immersed in oil phase is determined by contact angle. The results of numerical simulation reveal that the following situations have positive effect on the electrostatic force：(1) a large contact angle, (2) a small cylinder radius, and (3) a thinner membrane for a constant amount of fixed charge. Based on a fixed ionic strength, the effect of cationic valence of the electrolyte on the electrostatic force is negligible in general. If two cylinders are close enough, the larger the cationic valence, the greater the electrostatic force.
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