Process for the production of a composite membrane

Details Process for the production of a composite membrane Process for the production of a composite membrane

B - Operations, Transporting

01

D

B01D 69/12 (2006.01) B01D 67/00 (2006.01) C08J 5/22 (2006.01) H01M 2/14 (2006.01) H01M 8/10 (2006.01)

Patent

CA 2368832

Process for the production of a composite membrane comprising a porous film of a first polymer, the pores of which contain a second polymer, by depositing the second polymer from a solution in the pores of the first polymer, characterised in that the film of the first polymer is contacted with the surface of a first electrode which, together with at least one counterelectrode, is present in the solution of the second polymer and with such a potential difference being applied across the first electrode and the counterelectrode that the second polymer moves towards the first electrode, in which process it must pass the film.

L'invention concerne un procédé de production d'une membrane composite comprenant un film poreux constitué d'un premier polymère, dont les pores renferment un second polymère. Ledit procédé, qui consiste à déposer le second polymère issu d'une solution dans les pores du premier polymère, est caractérisé en ce que le film constitué du premier polymère est mis en contact avec la surface d'une première électrode se trouvant, conjointement avec une contre-électrode au moins, dans la solution du second polymère, et en ce qu'une telle différence de potentiel est appliquée aux bornes de la première électrode et de la contre-électrode que le second polymère se déplace vers la première électrode, procédé au cours duquel il traverse le film.

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