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化学学报
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化学学报 ›› 2010, Vol. 68 ›› Issue (06): 576-582. 上一篇    下一篇

研究论文

四磺酸基铜酞菁-海藻酸钠/壳聚糖双极膜的制备与表征

陈日耀*,1，陈震1,2，郑曦1，陈晓1，张灵1，张素贞1   

  1. (1福建师范大学化学与材料学院 福州 350007)
    (2宁德师范高等专科学校化学系 宁德 352100)
  • 投稿日期:2009-06-28 修回日期:2009-09-27 发布日期:2010-03-28
  • 通讯作者: 陈震 E-mail:zc1224@pub1.fz.fj.cn
  • 基金资助:

    福建省自然科学基金（No. D0710009）资助

Preparation and Characterization of CuTsPc-SA/mCS Bipolar Membrane

Chen Riyao*,1 Chen Zhen1,2 Zheng Xi1 Chen Xiao1 Zhang Ling1 Zhang Suzhen1   

  1. (1 College of Chemistry and Materials Science, Fujian Normal University, Fuzhou 350007)
    (2 Chemistry Department, Fujian Ningde Teachers College, Ningde 352100)
  • Received:2009-06-28 Revised:2009-09-27 Published:2010-03-28

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1343

被引次数

16 | 4

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/mCS BPM). 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120 mA/cm2时槽电压仅为5.6 V. 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8 mol/L的酸溶液中具有稳定的工作性能.

关键词: 双极膜, 海藻酸钠, 壳聚糖, 四磺酸基铜酞菁

Sodium alginate (SA) and chitosan (CS) were modified by Fe3＋ and glutaraldehyde as linking reagents to prepare CuTsPc-SA/mCS bipolar membrane (BPM). The copper phthalocyanine tetrasulfonic acid (CuTsPc) was added into the SA cation exchange layer to improve the ion exchange capacity and promote water splitting at the interlayer of the CuTsPc-SA/mCS BPM. X-ray photoelectron energy spectrum (XPS) was used to characterize the CuTsPc-SA cation exchange membrane. The experimental results indicated that the ion exchange capacity and hydrogen ion transmigration rate of the CuTsPc-SA cation exchange membrane were increased. In comparison with the mSA/mCS BPM modified by Fe3＋ or ferrocene, the membrane impedance and IR drop of the CuTsPc-SA/mCS BPM were decreased. The cell voltage was only 5.6 V at a higher current density of 120 mA•cm―2. When the concentration of CuTsPc was 2.5%, the CuTsPc-SA/mCS BPM was stable in an acid solution ([H＋]＜8 mol/L).

Key words: bipolar membrane, sodium alginate, chitosan, copper phthalocyanine tetrasulfonic acid