Hollow fibre membrane

摘要

The present invention relates to a process for manufacturing a hollow fibre membrane having a supporting layer and a separating layer, said process comprising:
(a) extruding a spinning composition comprising a first polymer and a solvent for the first polymer through an inner annular orifice of a hollow-fibre die;(b) co-extruding a composition comprising an organic nucleophilic reagent and a mixtures of a solvent and a non-solvent for the first polymer, wherein the composition is either extruded through a central annular orifice of the hollow-fibre die or through an outer annular orifice of a hollow-fibre die; and(c) passing the hollow-fibre through a coagulation bath.
The hollow fibre membrane according to the present invention can be used in gas separation processes, vapour separation processes and liquid filtration processes.

主权项

1. A process for manufacturing a hollow fibre membrane having a supporting layer and a separating layer, said process comprising:
(a) extruding a spinning composition comprising a first polymer and a solvent for the first polymer through an inner annular orifice of a hollow-fibre die; (b) co-extruding a composition comprising an organic nucleophilic reagent and a mixture of a solvent and a non-solvent for the first polymer, wherein the composition is either extruded through a central annular orifice of the hollow-fibre die or through an outer annular orifice of a hollow-fibre die; and (c) passing the hollow-fibre through a coagulation bath, wherein:
(1) the first polymer is a hydrophobic polymer; and(2) the organic nucleophilic reagent is selected from the group consisting of ethylene diamine, diethylene triamine, triethylene tetramine, tetraethylene pentamine, pentaethylene hexamine and polvethyleneimines; and wherein the organic nucleophilic reagent crosslinks the first polymer.