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分别用Fe3+和戊二醛作为交联剂对海藻酸钠(SA)阳离子交换膜和壳聚糖(CS)阴离子交换膜进行改性,制备了四磺酸基铜酞菁(CuTsPc)-海藻酸钠/改性壳聚糖双极膜(CuTsPc-SA/mCSBPM).在海藻酸钠阳膜层中添加四磺酸基铜酞菁,以提高阳膜层的离子交换容量,促进双极膜中间层中水的解离.采用X射线光电子能谱(XPS)对CuTsPc-SA阳离子交换膜进行了表征.实验结果表明,改性后SA阳膜层的离子交换容量、H+透过率均获得提高.与Fe3+改性或二茂铁离子改性的mSA/mCS双极膜相比,CuTsPc-SA/mCS双极膜的阻抗及电阻压降(即膜IR降)均下降.当电流密度为120mA/cm2时槽电压仅为5.6V.当CuTsPc含量为2.5%(质量分数)时CuTsPc-SA/mCS双极膜在H+离子浓度小于8mol/L的酸溶液中具有稳定的工作性能.
The cation exchange membrane of sodium alginate (SA) and the anion exchange membrane of chitosan (CS) were modified by Fe3 + and glutaraldehyde as crosslinking agents respectively to prepare CuTsPc-alginic acid Sodium / modified chitosan bipolar membrane (CuTsPc-SA / mCSBPM) .In addition, tetrasulfonic acid copper phthalocyanine was added to the sodium alginate layer to improve the ion exchange capacity of the cation layer and promote the formation of bipolar membrane The ion exchange capacity and H + transmittance of the modified SA Yang film were both improved by using X-ray photoelectron spectroscopy (XPS) to characterize the CuTsPc-SA cation exchange membrane. The resistance and the voltage drop of the CuTsPc-SA / mCS bipolar membrane (ie, the membrane IR drop) decreased compared with that of the mSA / mCS bipolar membrane modified with Fe3 + or ferrocene ions. When the current density was 120mA / cm2 when the cell voltage is only 5.6 V. When the content of CuTsPc is 2.5% (mass fraction) CuTsPc-SA / mCS bipolar membrane in the H + ion concentration less than 8mol / L acid solution has a stable performance.