Porous membranes suitable for separation devices and other uses

Details Porous membranes suitable for separation devices and other uses Porous membranes suitable for separation devices and other uses

B - Operations, Transporting

01

D

B01D 71/02 (2006.01) C25D 11/04 (2006.01) C25F 3/02 (2006.01)

Patent

CA 2057930

Porous membranes incorporating porous anodic films are disclosed. The membranes, which may be used as filters, gaseous diffusion media, dialysis membranes, etc,, are produced by porous anodizing aluminum or other porous anodizable moral, creat- ing a weakened stratum in the resulting porous anodic film (e.g, by a voltage reduction procedure during the anodizing step), at- taching a support to the porous anodic film and separating the film along the weakened stratum. If the support is perforated the resulting structure is suitable as a separation device. If imperforate, the support can subsequently be perforated, if required, or re- placed by a perforate support or supporting structure. The resulting structure has a non-metallic imperforate or perforated sup- porting layer (made, for example of plastic or ceramic) or other supporting structure, reinforcing a porous anodic film in which the pores completely penetrate the film.

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