Acta Phys. -Chim. Sin. ›› 2007, Vol. 23 ›› Issue (11): 1771-1775.doi: 10.3866/PKU.WHXB20071122

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Preparation of Ni-mSA-mCS Bipolar Membrane and Its Application in Electro-generation of TGA

HUANG Zhen-Xia; CHEN Ri-Yao; ZHENG Xi; CHEN Xiao; CHEN Zhen   

  1. Experiment Center, College of Chemistry and Materials Science, Fujian Normal University, Fuzhou 350007, P. R. China
  • Received:2007-06-13 Revised:2007-08-27 Published:2007-11-01
  • Contact: CHEN Zhen;

Abstract: Sodiumalginate (SA) and chitosan (CS) were modified by Ca2+ and glutaraldehyde (GA) as linking reagents respectively to prepare Ni-mSA-mCS (m: modified) bipolar membrane (BM). The nickel net was settled down to the surface of the mSA cation membrane as a cathode. It improved the mechanical property of membranes and realized zero polar distance, minimized the IR drop in the cathode electrolyte. It was characterized by FTIR and SEM, and used as a separator in the electrolysis cell to produce thioglycolic acid (TGA). The experiment results showed that TGA was preparedeffectivelyby electro-reduction of dithiodidiglycolic acid (DTDGA). The current efficiencywas up to 66.7% at room temperature (25 ℃) under the current density of 10 mA·cm-2. Compared with the traditional metal reduction method, the electro-reduction technology saves the zinc powder and eliminates the pollution to environment.

Key words: Electro-generation, Thioglycolic acid, Dithiodiglycolic acid, Ni-mSA-mCS bipolar membrane


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