Method for producing gas separation membranes

摘要

A method is disclosed for producing composite, hollow fibre gas separation membranes (34). The external surfaces of the porous hollow fibre tubes that are used in the construction of the membranes (34) are subjected to a modification technique before the external surfaces are coated with a thin layer of selected polymer so as to increase the number of pores in the fibre surface. The modification technique comprises the steps of soacking the membranes with a mixture of water and acetone, rinsing with water and drying the membrane. The composite hollow fibre membranes (34) may be used in a method of manufacturing a gas separation module (32).