Modified hollow fibre membrane materials and the process for their modification

摘要

A modified hollow fiber membrane material from porous or dense membrane materials in which the modification is formed as a graft polymerizate layer on at least the surface towards (sic) the feed solution of a hollow fiber membrane, the layer thickness along the length of the hollow fibres being non-uniform is new. An Independent claim is included for a process for modifying membrane material in which at least one monomer with at least one radical polymerizable double bond in the molecule, with the aid of a preadsorbed macroinitiator which has radical forming groups and/or groups acting as photoinitiators, is able to initiate heat and/or radiation induced graft polymerization, where the degree of grafting and the layer thickness are controlled by the monomer concentration and the reaction time.