Long-branched-chain polysulfone anionic membrane and preparation method thereof

An anion exchange membrane and long-chain branched technology, which is applied in the field of long-chain branched polysulfone anion membrane and its preparation, can solve the problems of reduced mechanical properties of the membrane and increased water absorption, so as to reduce swelling, improve connectivity, and enhance phase The effect of separation drive
CN104877136AActive Publication Date: 2015-09-02DALIAN UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
DALIAN UNIV OF TECH
Publication Date
2015-09-02

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Abstract

The invention discloses a long-branched-chain polysulfone anionic membrane and a preparation method thereof. The structure of the membrane material is disclosed in the specification. The preparation method comprises the following steps: polysulfone acylation, carbonyl reduction, quaternization, film formation, alkalification and the like. Compared with the traditional anion-exchange membrane sequentially subjected to quaternization and functionalization, the polysulfone anion-exchange membrane contains the long branched chain on the side chain, so that the hydrophilic group is far away from the hydrophobic polymer main chain, thereby enhancing the phase separation driving force in the film formation process, improving the connectivity of the ion channels in the membrane and further enhancing the hydroxide ion conductivity of the membrane. The long alkyl side chain can obviously reduce the degree of swelling of the quaternary ammonium salt membrane and reduce the nucleophilic attack of water or OH-. The long-branched-chain polysulfone anionic membrane can obtain higher ion conductivity on the premise of relatively lower water absorptivity, thereby solving the contradiction in the anionic membrane for a long time.
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Description

Technical field

[0001] The invention belongs to the technical field of basic anion exchange membranes, and relates to a long-chain branched polysulfone anion membrane and a preparation method thereof. Background technique

[0002] As environmental pollution becomes more and more serious, fuel cells have entered people’s eyes as a new, green and efficient chemical energy source. Proton exchange membrane fuel cells have become a research subject due to their high energy conversion rate, environmental friendliness, and rapid start-up. One of the most mature fuel cells. However, its expensive noble metal catalysts have also become a key constraint to its inability to commercialize on a large scale. Compared with proton exchange membrane fuel cells, alkaline fuel cells have fast fuel oxidation and reduced methanol permeability. The main advantage is that they can use non-noble metals such as Mn and Co as electrocatalysts, reducing their production costs.

[0003] The common method of ...

Claims

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