Preparation of Alumina Membranes by Tape Casting and Dip Coating

摘要

The preparation of an alumina ultrafiltration mem- brane with a mean pore size of 6·5 nm was performed by slip casting or tape casting of the support, dip coating or tape casting of the intermediate layer, followed by dip coating of the top layer. Controlled porosity and pore size in the support were obtained by the addition of starch particles which were subse- quently burned out. A conventional process based on dip coating to create the intermediate layer was used initially. An alternative process was developed, based on tape casting of the support and the inter- mediate layer, followed by lamination and sintering in one step.