【摘要】 在聚乙烯醇聚合物基质中原位引入植酸、甲醇、水、九水合硝酸铬和N,N-二甲基甲酰胺的混合液（植酸与九水合硝酸铬形成具有立体结构的金属有机框架结构），以戊二醛为交联剂，将聚乙烯醇聚合物交联为网状结构，由此构筑一系列内部含有基于植酸构筑的多孔金属有机框架结构（MOF）及适合燃料电池使用的阴离子导电膜（MOF@PVA）；通过调节阴离子导电膜中Cr³⁺的质量分数，对其结构及性能进行优化。结果表明，制得的导电膜形貌平整均一，内部含有大量可供OH-迁移和涵养水分子的孔结构；导电膜的电导率、含水率、机械性能均随着Cr³⁺质量分数的增加而增加。其中，当m(Cr³⁺)/m（导电膜）=0.012时，导电膜的电导率最高，为24.9 mS/cm；导电膜在80℃、3 mol/L NaOH溶液中浸泡168 h后，电导率仅下降8%。更多还原

【Abstract】 This paper in situ introduced a mixture of phytic acid, methanol, water, chromium nitrate nonahydrate, N, N-dimethylformamide in polyvinyl alcohol casting solution, where phytic acid and chromium nitrate nonahydrate formed a metal organic framework（MOF） with a three-dimensional structure. Glutaraldehyde was the crosslinking agent to crosslink polyvinyl alcohol into a network structure, and a series of anion exchange membranes with a porous MOF were constructed for fuel cells（MOF@PVA）. During the experiment, the structure and properties of the membranes were optimized by adjusting the Cr³⁺content. Characterization and performance test results show that the obtained composite membranes are flat and uniform in morphology, with a large number of pore structures available for OH-migration and retention of water molecules.Additionally, membrane conductivity, water content, and mechanical properties increase with the rising Cr³⁺ mass fractions.When m(Cr³⁺)/m（conductive film） is 0.012, the conductivity is the highest, that is 24.9 mS/cm. The membrane conductivity is only reduced by 8% after being immersed in a 3 mol/L NaOH solution at 80 ℃ for 168 hours.更多还原