Membrane post treatment
AssigneeSiemens Industry, Inc.
InventorsDaniel Mullette, Joachim Muller, Neeta Patel
Life of this patent
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Abstract
The invention relates to polymeric ultrafiltration or microfiltration membranes of, for instance, poly(ethylene chlorotrifluoroethylene) (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.
Claims16
A polymeric ultra or microfiltration membrane comprising poly(vinyl methyl ether) and at least one of poly(ethylene chlorotrifluoroethylene), polyvinylidene fluoride (PVDF), and polypropylene, wherein the poly(vinyl methyl ether) (PVME) is incorporated in the membrane as a homogeneous or heterogeneous dispersion throughout the membrane.
Dependencies are inferred from the claim text.