Production of membranes, for use as polymer electrolyte membranes for fuel cells, comprises forming sulfonated polysulfone block copolymer into membrane film

• Main Authors: RABKIN, MICHAIL, KRAUSE, KARL-HEINZ, BRUDER, MICHAEL, MERKMANN, GERHARD
• Format: Patent
• Language: English; German
• Published: 26.02.2004
• Edition: 7
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; BASIC ELECTRIC ELEMENTS; CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; ELECTRICITY; GENERAL PROCESSES OF COMPOUNDING; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; SEPARATION; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; WORKING-UP

The production of membranes comprises copolymerizing a sulfone monomer and at least one non-sulfone monomer to form a polysulfone block copolymer, sulfonating the copolymer and forming the sulfonated copolymer into a membrane film. Die Erfindung betrifft ein Verfahren zur Herstellung einer Membran, insbesondere Polymerelektrolytmembran für Brennstoffzellen, gekennzeichnet durch folgende Verfahrensschritte: DOLLAR A - ein erstes Monomer auf der Basis eines Sulfons und wenigstens ein zweites Monomer, das frei von einer SO¶2¶-Gruppe ist, werden copolymerisiert unter Bildung eines Polysulfon-Blockcopolymerisates; DOLLAR A - das Polysulfon-Blockcopolymerisat wird nun sulfoniert unter Bildung eines sulfonierten Polysulfon-Blockcopolymerisates; DOLLAR A - anschließend wird das sulfonierte Polysulfon-Blockcopolymerisat derart bearbeitet, dass ein Membranfilm gebildet wird.