摘要 |
<p>The invention pertains to composite polymeric membranes for the separation of gas mixtures and a method for their preparation. The membranes have higher selectivity in the separation of mixtures He/N2 and O2/N2, suitable mechanical properties and a high permeability. They consist of a polymeric porous base made from poly(2,6-dimethyl-1,4-phenyleneoxide) and a polymeric selective separation layer formed from a polyamidoimide of the general formula I, <CHEM> and n = 140- 220, or from an interpolymeric equimolar complex of PAI-1 with polyvinylpyrrolidone, or from an aromatic polyimide of the general formula II, <CHEM> and n = 150-230, or of the general formula III, <CHEM> where n = 150-240, or from polymeric imides of the general formula IV, <CHEM> or also from their copolymers with styrene, methyl methacrylate, methyl acrylate, and dimethylaminoethyl methacrylate. The method for the preparation of these composite polymeric membranes consists in saturation of a porous base of poly(2,6-dimethyl-1,4-phenyleneoxide) with an inert organic solvent, e.g. aliphatic C7H16 to C10H22 aliphatic hydrocarbons or their mixtures, drying, and coating with a 1 to 25 mass-% solution of the selective separation polymer in an organic solvent incompatible with the organic liquid, e.g. N-methylpyrrolidone, N,N-dimethylformamide, and/or N,N-dimethylacetamide.</p> |
申请人 |
CESKOSLOVENSKA AKADEMIE VED;AKAD NAUK SSSR |
发明人 |
BLEHA, MIROSLAV, DIPL.-ING. CSC;SCHAUER, JAN, DIPL.-ING. CSC;LOKAJ, JAN, DIPL.-ING. CSC;POLOCKAJA, GALINA ANDREJEVNA CSC;KUZNECOV, JURIJ PETROVIC CSC;ROMASKOVA, KIRA ALEXANDROVNA |