Highly porous polyvinylidene difluoride membranes

Details Highly porous polyvinylidene difluoride membranes Highly porous polyvinylidene difluoride membranes

B - Operations, Transporting

01

D

B01D 71/34 (2006.01) B01D 67/00 (2006.01) B01D 69/02 (2006.01) B01D 61/14 (2006.01)

Patent

CA 2292916

The present invention relates to the field synthetic polymeric membrane materials formed from casting polyvinylidene difluoride (PVDF) polymer solutions and/or dispersions. Membranes formed in accordance with the present invention are all highly porous. Both internally isotropic membranes and highly asymmetric PVDF membranes are disclosed. Membranes of the invention may be hydrophobic or hydrophilic. The membranes of the invention are useful in a variety of microfiltration and ultrathin applications.

La présente invention concerne des matières en polymère synthétique obtenues par moulage de solutions/dispersions polymérique de difluorure de polyvinylidène (PVDF). Les membranes ainsi obtenues présentent une très forte porosité. L'invention englobe à la fois des membranes à isotropie interne et des membranes fortement asymétriques (PVDF). Les membranes selon l'invention peuvent être hydrophobes ou hydrophiles. Elles conviennent pour des applications de microfiltration ou des utilisations nécessitant des membranes ultra-minces.

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