物理化学学报 >> 2007, Vol. 23 >> Issue (11): 1771-1775.doi: 10.3866/PKU.WHXB20071122

研究论文 上一篇    下一篇

Ni-mSA-mCS双极膜的制备及其在电合成TGA中的应用

黄振霞; 陈日耀; 郑曦; 陈晓; 陈震   

  1. 福建师范大学化学与材料学院实验中心, 福州 350007
  • 收稿日期:2007-06-13 修回日期:2007-08-27 发布日期:2007-11-01
  • 通讯作者: 陈震 E-mail:zhenxiahuang@163.com; zc1224@pub1.fz.fj.cn

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 E-mail:zhenxiahuang@163.com; zc1224@pub1.fz.fj.cn

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摘要： 通过用Ca2+改性海藻酸钠(SA)和用戊二醛改性壳聚糖(CS)制备Ni-mSA-mCS(m: modified)双极膜. 镍网预先埋在mSA膜表面作为阴极, 不仅增强了膜的机械性能, 而且降低阴极电解液的IR降, 实现零极距. 测定了膜的红外光谱、电镜扫描、机械性能. 将Ni-mSA-mCS双极膜应用于电还原制备巯基乙酸(TGA). 实验结果表明, 电流密度为10 mA·cm-2, 常温电解, 电流效率可达66.7%. 与传统的Zn还原法相比, 不仅省去了昂贵的金属还原剂的消耗, 而且消除了锌泥对环境的污染.

关键词: 电合成, 巯基乙酸, 二硫代二乙酸, Ni-mSA-mCS双极膜

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

MSC2000: 

  • O646