MICROPOROUS MEMBRANE HAVING METALLIC COATING

The present invention relates to an antimicrobial membrane filter more particularly the present invention relates to a membrane filter for removing viruses. It is yet another object of the present invention to provide a membrane having a copper layer without affecting the porosity of the membrane. I...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	RAJANARAYANA, Venkataraghavan, ALENCHERRY, Tinto, Johnichan, MATTATHIL SUKUMARAN, Suma
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMICAL SURFACE TREATMENT CHEMISTRY COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL DIFFUSION TREATMENT OF METALLIC MATERIAL INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL METALLURGY PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL SEPARATION SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION TRANSPORTING
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Beschreibung
Zusammenfassung:	The present invention relates to an antimicrobial membrane filter more particularly the present invention relates to a membrane filter for removing viruses. It is yet another object of the present invention to provide a membrane having a copper layer without affecting the porosity of the membrane. It is yet another object of the present invention to provide a membrane which provides high flux and high flow rates at low pressure drops. The present inventors have found that uniform and well adhering metallic copper on a porous substrate can be provided without an etching step when a surface of apolymeric porous substrate has a metallic silver coating and a metallic copper coating overlaying the silver coating. It was further found that the filtration characteristics of the disclosed microporous membrane remained unaltered. It was further found that when the microporous membrane of the present invention is used in water filtration the copper leaching into the water is within the acceptable limits.