Defect-free ultrahigh flux asymmetric membranes

Details Defect-free ultrahigh flux asymmetric membranes Defect-free ultrahigh flux asymmetric membranes

C - Chemistry, Metallurgy

08

J

18/16

C08J 9/28 (2006.01) B01D 67/00 (2006.01)

Patent

CA 2004633

DEFECT-FREE ULTRAHIGH FLUX ASYMMETRIC MEMBRANES ABSTRACT Defect-free, ultrahigh flux integrally-skinned asymmetric membranes having extremely thin surface layers (< 0.2 µm) comprised of glassy polymers are disclosed. The membranes are formed by casting an appropriate drope followed by forced convective evaporation of solvent to obtain a dry phase separated asymmetrical structure. The structure is then washed in a precipitation liquid and dried. Cl/USTB334

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