METHOD FOR MANUFACTURING FILTERING MEMBRANES BY ADDITIVE TECHNIQUE AND RESULTING MEMBRANES

摘要

The present invention relates to a membrane and a method for manufacturing a membrane for filtering a fluid, said membrane comprising: a substrate having a three-dimensional structure and consisting of an one-piece ceramic porous body; and at least one separating filtering layer having a porosity that is lower than that of the substrate, in which the three-dimensional structure of the substrate is produced by forming elemental layers that are stacked and connected in series with one another, by repeating steps: a) depositing a continuous bed of powder at least partially consisting of a powder intended for forming the ceramic porous body; b) locally consolidating, part of the deposited material such as to create the elemental layer, and simultaneously linking the elemental layer thus formed with the preceding layer such as to gradually grow the desired three-dimensional shape.

主权项

1. A process for the manufacture of a membrane for the filtration of a fluid, said membrane comprising:
a support exhibiting a three-dimensional structure and being composed of a monolithic ceramic porous body, and at least one separating filtration layer deposited over a portion of the surface of the support, in which the three-dimensional structure of the support is produced by formation of superimposed individual sheets successively bonded to one another, by repetition of the following stages: a) deposition of a continuous powder bed composed at least in part of a powder intended to form the ceramic porous body, the bed being of unvarying thickness along a surface greater than the section of said porous body taken at the level of the sheet; b) localized consolidation, according to a predetermined pattern for each sheet, of a portion of the deposited substance in order to create the individual sheet and simultaneous bonding of the individual sheet thus formed to the preceding sheet, so as to bring about the progressive growth of the desired three-dimensional shape.