合成了一种含多醚键的二羧酸单体,并将其与3,3′-二氨基联苯胺和3,3′-二磺酸钠-2,2-双(4-羧基苯基)六氟丙烷共缩聚,制备了含有多醚键的新型可溶性聚苯并噻唑-咪唑聚合物。在此基础上将木质素磺酸钠引入到聚合物中制备了不同掺杂量的复合膜。制备的复合膜相较于原始膜具有良好的综合性能。结果表明:在最佳掺杂比例下,复合膜的拉伸强度可以达到93.11MPa,同时具有13.2%的断裂伸长率。此外该复合膜在最高50%吸水率的水平下保持了仅1.7%的超低溶胀率,同时复合膜的质子电导率可以达到0.143S/cm,表现出良好的综合性能。
A novel dicarboxylic acid monomer featuring multiple flexible ether linkages was synthesized.This monomer was then co-polycondensed with 3,3′-diaminobenzidine and 3,3′-disodium sulfo-2,2-bis(4-carboxyphenyl) hexafluoropropane to produce a soluble polybenzothiazole-imidazole polymer containing multiple ether bonds(sPBTI).Subsequently,sodium lignosulfonate (SLS) was incorporated into the polymer to fabricate composite membranes with varying doping levels.The prepared composite membranes demonstrated superior overall performance compared to the pristine membrane.The results showed that under the optimal doping ratio,the composite membrane achieved a tensile strength of 93.11MPa while maintaining an elongation at break of 13.2%.The composite membrane maintained a remarkably low swelling ratio of merely 1.7% at a water uptake of up to 50%.Furthermore,it achieved a proton conductivity of 0.143S/cm,showcasing excellent comprehensive properties.
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基金资助
国家自然科学基金(U1904171);河南工业大学拓新团队培育项目(2025TXTD03)
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