PREPARATION OF SYNTHETIC PLASMA FILM

摘要

PURPOSE: To obtain composite plasma membranes for separating 1-3C alkanols from mixtures thereof with other org. liquids by pervaporation with a high selectivity and a high flow rate. CONSTITUTION: A gaseous mixture is plasma polymerized by glow discharging a pore-free impermeable polymer layer on a surface of a porous substrate, to make a synthetic plasma membrane. The gaseous mixture contains a hydrocarbon as the matrix-forming component, an inorg. compd. including nitrogen, silicon, sulfur or phosphor as the non-matrix-forming component and an oxygen- contg. compd. The impermeable polymer layer is produced directly on the porous substrate without the use of an impermeable intermediate layer. The porous substrate has a pore diameter of less than 100 nm on the side facing the pore- free polymer layer.