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用四磺酸基铜酞菁(CuTsPc)和四氨基铜酞菁(CuTAPc)改性海藻酸钠(SA)阳膜层和壳聚糖(CS)阴膜层,制备了CuTsPc-SA/CuTAPc-CS双极膜(BPM),并以CuTsPc-SA/CuTAPc-CSBPM作为电解槽隔膜,成对电合成L-磺基丙氨酸和L-半胱氨酸。研究结果表明,四磺酸基铜酞菁和四氨基铜酞菁可以促进双极膜中间层水的解离,大大降低膜阻抗和膜电阻压降(即IR降),当电流密度为45mA/cm2时,在1mol/LNa2SO4溶液中,CuTsPc-SA/CuTAPc-CS双极膜的IR降仅为0.3V。综合考虑电流效率和产量两个因素,电合成时电槽的电流密度以35mA/cm2为宜。
CuTsPc-SA / CuTAPc-SA was prepared by modifying the sodium alginate (SA) layer and the chitosan (CS) layer with tetrasulfonate copper phthalocyanine (CuTsPc) and tetraamine copper phthalocyanine (CuTAPc) CS bipolar membrane (BPM), and CuTsPc-SA / CuTAPc-CSBPM was used as the separator of the electrolyzer to synthesize L-cysteic acid and L-cysteine in pairs. The results show that tetrakis sulfonic copper phthalocyanine and tetraaminophenanthocyanine can promote the dissociation of the water in the interlayer of the bipolar membrane and greatly reduce the membrane resistance and the voltage drop of the membrane resistance (ie IR drop). When the current density is 45mA / cm 2, the IR drop of CuTsPc-SA / CuTAPc-CS bipolar membrane was only 0.3V in 1mol / L Na 2 SO 4 solution. Considering both the current efficiency and output, the current density of the cell is 35mA / cm2 when electrosynthesis.