Abstract

Using a porous alumina support, seeding for the preparation of a zeolite separation membrane is conducted by placing the electrodes for electrophoretic deposition (EPD) on both sides of the support. In this case, two electrokinetic phenomena are observed: electrophoresis of the seed crystal particles and electroosmotic flow of the solvent within the porous alumina support. When water and acetone are used, the direction of electroosmotic flow is opposite to that of EPD, and the strength of electroosmotic flow with water is higher than that with acetone. In contrast, with methanol, the direction of the electroosmotic flow is the same as that for EPD, with a weak particle charge. The results show that both the support and the solvent contribute to the change in the strength and direction of the electroosmotic flow.

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