Preparation and characterization of mSA/mCS bipolar membranes modified by CuTsPc and CuTAPc

• DOI: 10.1016/j.memsci.2010.01.013
• Publication Date: 2010-01-15T04:28:12Z
• Authors: Ri-Yao Chen; Zhen Chen; Xi Zheng; Xiao Chen; Shao-Ying Wu
• Keywords: 02 engineering and technology; 0210 nano-technology

Abstract In this paper, sodium alginate (SA) and chitosan (CS) were modified by copper phthalocyanine tetrasulfonic acid (CuTsPc) and copper tetraaminophthalocyanine (CuTAPc) respectively to prepare the CuTsPc-SA/mCS bipolar membrane (BPM) and the mSA/CuTAPc-CS BPM (here, mCS and mSA indicate the CS anion exchange layer and the SA cation exchange layer modified by glutaraldehyde and Fe 3+ as linking reagents, respectively). Experimental results showed that the ion exchange capacities and the ion transmigration rates of the CuTsPc-SA cation exchange membrane and the CuTAPc-CS anion exchange membrane were increased. In comparison with the mSA/mCS BPM modified by Fe 3+ or ferrocene, the membrane impedance and the IR drop of the CuTsPc-SA/mCS BPM or the mSA/CuTAPc-CS BPM decreased. The CuTsPc-SA/mCS BPM had the lowest cell voltage, which was only 5.6 V at a higher current density of 120 mA cm −2 . When the concentration of CuTsPc or CuTAPc was 5.0 wt%, both of the CuTsPc-SA/mCS BPM and the mSA/CuTAPc-CS BPM were stable in the acid solution ([H + ] −1 ).