PORÖSE MEMBRAN FÜR TRENNUNGSVORRICHTUNGEN UND ANDERE ANWENDUNGEN.

摘要

PCT No. PCT/CA90/00329 Sec. 371 Date Dec. 16, 1991 Sec. 102(e) Date Dec. 16, 1991 PCT Filed Sep. 28, 1990 PCT Pub. No. WO91/04785 PCT Pub. Date Apr. 18, 1991.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 metal, creating a weakened stratum in the resulting porous anodic film (e.g. by a voltage reduction procedure during the anodizing step), attaching 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 replaced by a perforate support or supporting structure. The resulting structure has a non-metallic imperforate or perforated supporting 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.