MANUFACTURE OF ULTRATHIN MEMBRANE

摘要

PURPOSE:To manufacture the titled ultrathin membrane having an extremely excellent gas permeable characteristic and high gas separability by forming a membrane of a polymer obtained by hydrogenating polysilylacetylene on the water surface. CONSTITUTION:1-4wt% polymer having a repeating unit shown by the figure and having 10<4>-2X10<6> weight average mol.wt. or polymer obtained by hydrogenating a part or the whole of unsaturated bonds of said polymer is dissolved in a nonpolar solvent, and 0.1-5wt% surfactant or polyhydroxystyrene- polydimethylsiloxane copolymer is added to the soln. A membrane is formed from the soln. on the water surface. A straight-chain or a cyclic aliphatic hydrocarbon, a hydrogenated hydrocarbon, and an aromatic hydrocarbon are appropriately used as said solvent.