Novel composite hollow fibre gas separation membranes with high selectivity and improved solvent resistance

Composite gas separation membranes with a 0.1–3 mm thick film of Hyflon AD 60X on a porous hollow fibre ultrafiltration membrane support of amorphous poly(ether ether ketone), were prepared. The influence of the coating conditions on the film thickness and on the pure gas transport properties was studied. The gas transport properties were related to the film thickness and to the morphology of the supporting UF membrane.

Composite perfluorpolymer membranes can be obtained by dip coating of hollow fibres. Optimization of the described procedure offers the interesting possibility to obtain membranes with the typical high gas selectivity of asymmetric