【摘要】 分别用Fe3+和戊二醛作为交联剂对羧甲基纤维素钠(CMC)-聚乙烯醇(PVA)阳膜层和壳聚糖(CS)-聚乙烯醇阴膜层进行改性,在中间界面层引入以静电纺丝技术制备的聚丙烯腈(PAN)-四磺酸基铜酞菁(CuTsPc)纳米纤维纺丝,制备了CMC-PVA/PAN-CuTsPc/CS-PVA双极膜(BPM).并用扫描电镜、接触角测定仪,电流密度-槽电压关系曲线、交流阻抗谱等对制备的双极膜进行了表征.结果表明,CMC-PVA阳膜用PAN-CuTsPc纳米纤维纺丝改性后,表面亲水性增强,中间界面层水解离效率提高,致使双极膜的膜阻抗和IR降显著降低.CMC-PVA/PAN-CuTsPc/CS-PVA(w(CuTsPc):3.0%)双极膜在90 mA·cm-2电流密度时的电阻压降(即膜IR降)仅为0.9 V.更多还原

【Abstract】 The carboxymethyl cellulose( CMC)-polyvinyl alcohol( PVA) cation exchange membrane and the chitosan( CS)-polyvinyl alcohol anion exchange membrane were modified by Fe3 +and glutaraldehyde as linking reagents, respectively. The nanofibers of polyacrylonitrile(PAN)-copper phthalocyanine tetrasulfonic acid(CuTsPc) were prepared using electrospinning technique and introduced into the interlayer to prepare the CMC-PVA /PAN-CuTsPc /CS-PVA bipolar membrane(BPM),which was characterized using SEM,contact angle measurement,current-voltage characteristics,AC impedance spectroscopy and so on. The experimental results showed that after modification with PAN-CuTsPc nanofibers,the hydrophilicity of CMC-PVA membrane and the water splitting efficiency at the interlayer were increased,and the membrane impedance and cell voltage equipped by the BPM were decreased. The trans-membrane voltage drop( IR drop) of the CMC-PVA /PAN-CuTsPc /CS-PVA(w( CuTsPc): 3. 0%) BPM was as low as 0. 9 V at a current density of 90 mA·cm- 2.更多还原