Sulfonated polyaryletherketone copolymer containing benzothiazole group and preparation method thereof

Abstract

The invention discloses a sulfonated poly(aryle ether ketone) copolymer containing benzothiazole groups and a preparation method of the sulfonated poly(aryle ether ketone) copolymer. The copolymer is prepared through steps as follows: bisphenol monomers, 2,6-dichlorobenzothiazole, 4,4'-difluorobenzophenone and 3,3'-disulfonic acid sodium salt-4,4'-difluorobenzophenone are taken as raw materials, a salt-forming agent and a water-carrying agent are added after the raw materials are dissolved and mixed by a solvent, solid content of a reaction system is adjusted to be 15%-30%, the reaction system carries water for 3-6 h at the temperature of 120-140 DEG C, and reacts for 6-20 h at the temperature of 140-200 DEG C after the water-carrying agent is steamed out, a mixture is discharged to acetone or distilled water after the reaction is finished, a coarse product is obtained and washed, and the sulfonated poly(aryle ether ketone) copolymer containing the benzothiazole groups is obtained. An electrolyte membrane prepared from the copolymer has better dimensional stability, lower methanol permeability, higher antioxidative stability and good proton conduction performance, and compared with a traditional aromatic polyelectrolyte membrane, the electrolyte membrane prepared from the copolymer is a novel proton exchange membrane material with excellent performance and has good application prospect in the field of the electrolyte membrane of a fuel cell.

Description

technical field [0001] The present invention belongs to the field of polymer materials, and more specifically, the embodiments of the present invention relate to a sulfonated polyaryletherketone copolymer containing benzothiazole groups and a preparation method thereof. Background technique [0002] The development of polymer electrolyte membrane materials is one of the key technologies of fuel cells. At present, perfluorosulfonic acid series membranes are widely used in fuel cells, such as Dupont's Nafion series membranes, because of their excellent proton conductivity and chemical stability. However, due to the disadvantages of complex preparation process, high price, high fuel permeability and low use temperature, the wide application of Nafion membrane is limited. Therefore, the development of new polyelectrolyte membrane materials with excellent conductivity, reasonable cost and low fuel permeation has always been a hot spot for researchers. Polyaryletherketone polyme...

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Problems solved by technology

[0003] However, in order to improve the proton conductivity, it is necessary to increase the degree of sulfonation of the material. At a high degree of sulfonation, the polyaryletherketone membrane swells severely when it encounters water, which reduces the mechanical properties of the membrane. At the same time, the ability to resist free radical oxidation decreases, resulting in The membrane is easy to break, and the existence of these shortcomings greatly reduces the service life of the sulfonated polyaryletherketone membrane, especially under high temperature and high humidity operating conditions

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