초록 ▼

A composite fluid separation membrane having improved fluid permeabilities and a method for preparing same are disclosed. The composite fluid separation membrane is comprised of a porous support in the form of a flat sheet, tube or hollow fiber which is impregnated with a volatile solvent followed b

A composite fluid separation membrane having improved fluid permeabilities and a method for preparing same are disclosed. The composite fluid separation membrane is comprised of a porous support in the form of a flat sheet, tube or hollow fiber which is impregnated with a volatile solvent followed by the in situ formation of a separating layer wherein the preimpregnation of the pores of the porous support with the solvent provide a separating layer of substantially uniform thickness and minimum intrusion of the separating layer polymer into the pores of the porous support.

대표청구항 ▼

A process for forming a composite fluid separation membrane comprising: (a) impregnating a preformed porous support having pores extending there through with a volatile solvent; (b) forming in situ a separating layer on one or both surfaces of the porous support from a solution of a polymer having f

A process for forming a composite fluid separation membrane comprising: (a) impregnating a preformed porous support having pores extending there through with a volatile solvent; (b) forming in situ a separating layer on one or both surfaces of the porous support from a solution of a polymer having fluid separation capabilities; (c) evaporating the impregnation solvent while simultaneously evaporating the separating layer polymer solution solvent, the evaporation occurring before substantial diffusion of the separating layer polymer into the pores of the porous substrate; and (d) achieving a composite fluid separation membrane having improved permeability rates.