Fabrication and characterization of microfiltration tubular ceramic membranes

A method to prepare and characterize different microfiltration ceramic memb ranes is described here. The membranes are composite and consist in a macro porous support, giving high mechanical resistance, onto which a thin microp orous layer is deposited. This active film determines the retention propert ies of the membrane. Several versions of these membranes were prepared by c ontrolling: particle size, chemical formulation of the paste and its therma l treatment. Both the support and the active layer were obtained from slips consisting in caolin, clay, feldespatum etc. The morphology of the active layer, support and composite membrane have been investigated by AFM (Atomic Force Microscopy) and hydraulic permeabilities. Structural properties and permselectivity make these membranes appropriate to be efficiently used in microfiltration processes..