静电纺丝法制备PVA-SA-CuTsPc纳米纤维改性CMC-PVA/CS-PVA双极膜  

CMC-PVA/CS-PVA Bipolar Membrane Modified by PVA-SA-CuTsPc Nanofiber Using Electrospinning Technique

作　　者：周挺进[1] 陈晓[1] 陈日耀[1,2] 郑曦[1] 陈震[1] 

机构地区：[1]福建师范大学环境科学与工程学院,福建福州350007 [2]福建省高分子材料重点实验室,福建福州350007

出　　处：《高分子材料科学与工程》2013年第1期166-170,共5页Polymer Materials Science & Engineering

基　　金：福建省自然科学基金资助项目(2010J01028;2007J0125)

摘　　要：分别用Fe3+离子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,利用静电纺丝法制备聚乙烯醇(PVA)-海藻酸钠(SA)-四磺酸基铜酞菁(CuTsPc)纳米纤维纺丝,引入中间界面层,制备CMC-PVA/PVA-SA-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。研究结果表明,经PVA-SA-CuTsPc纳米纤维纺丝改性后,CMC-PVA阳膜表面亲水性增强,双极膜的中间界面层水解离效率提高,膜阻抗和槽电压下降。当电流密度为90 mA/cm2时,CMC-PVA/PVA-SA-CuTsPc/CS-PVA(w(CuTsPc)=3.0%)双极膜的电阻压降(即膜IR降)仅为0.5 V。In this paper, the carboxymethyl cellulose （CMC）-polyvinyl alcohol （PVA） cation exchange membranes and the chitosan （CS）-polyvinyl alcohol anion exchange membranes were modified by Fe3＋ and glutaraldehyde as linking reagents, respectively, and the polyvinyl alcohol-sodium alginate （SA）-copper phthalocyanine tetrasulfonic acid （CuTsPc） nanofibers prepared by electrospinning technique were introduced into the interlayer to prepare the CMC-PVA/PVA-SA-CuTsPc/CS-PVA bipolar membrane （BPM）. The BPM was characterized using SEM, contact angle measurement, current-voltage characteristics, AC impedance spectroscopy and so on. The results show that after the modification with PVA-SA-CuTsPc nanofibers, the hydrophilicity of CMC-PVA membrane surface and the water splitting efficiency at the interlayer increase, and the membrane impedance and cell voltage of the BPM decrease. The trans-membrane voltage drop （IR drop） of the CMC-PVA/PVA-SA-CuTsPc/CS-PVA （ w （CuTsPc） = 3.0 % ） BPM is as low as 0.5V at a current density of 90 mA/cm2.

关 键 词：双极膜 静电纺丝 纳米纤维 中间界面层 水解离 

分 类 号：TB383[一般工业技术—材料科学与工程]