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.
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.
出处
《福建师范大学学报(自然科学版)》
CAS
CSCD
北大核心
2014年第5期66-71,共6页
Journal of Fujian Normal University:Natural Science Edition
基金
福建省科技厅重点资助项目(2012H0019)
福州市科技局资助项目(2012-G-116)
福建省自然科学基金资助项目(2013J01034)
关键词
双极膜
静电纺丝
改性
中间界面层
水解离
bipolar membrane
electrospinning
modification
interlayer
water splitting