Membrane post treatment

B - Operations – Transporting – 01 – D

Patent

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Details

B01D 71/82 (2006.01) B01D 71/26 (2006.01) B01D 71/32 (2006.01) B01D 71/34 (2006.01) B01D 71/38 (2006.01)

Patent

CA 2530805

The invention relates to polymeric ultrafiltration or microfiltration membranes of, for instance, Halar, PVDF or PP, incorporating PVME or vinyl methyl ether monomers. The PVME may be present as a coating on the membrane or dispersed throughout the membrane or both. The membranes are preferably hydrophilic with a highly asymmetric structure with a reduced pore size and/or absence of macrovoids as a result of the addition of PVME. The PVME maybe cross-linked. The invention also relates to methods of hydrophilising membranes and/or preparing hydrophilic membranes via thermal or diffusion induced phase separation processed.

L'invention concerne des membranes d'ultrafiltration ou de microfiltration polymères en, par exemple, halar, PVDF ou PP, incorporant PVME ou des monomères d'éther méthylvinylique. Le PVME peut être présent comme revêtement sur la membrane et/ou diffusé sur toute la membrane. Les membranes sont de préférence hydrophiles présentant une structure hautement asymétrique avec dimensions des pores réduites et/ou absence de macrovides à la suite de l'adjonction de PVME. Ce dernier peut être réticulé. L'invention concerne également des procédés d'hydrophilisation des membranes et/ou de préparation de membranes hydrophiles par le biais d'une séparation de phase thermique ou de phase induite par diffusion.

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