Acta Chimica Sinica ›› 2007, Vol. 65 ›› Issue (21): 2466-2472. Previous Articles     Next Articles



  1. (福建师范大学化学与材料学院 福州 350007)
  • 投稿日期:2007-01-16 修回日期:2007-06-09 发布日期:2007-11-14
  • 通讯作者: 陈震

Electro-Generation of Thioglycolic Acid by mSA-CS Bipolar Membrane

HUANG Zhen-Xia; HUANG Xue-Hong; CHEN Ri-Yao; ZHENG Xi; CHEN Zhen*   

  1. (College of Chemistry and Materials Science, Fujian Normal University, Fuzhou 350007)
  • Received:2007-01-16 Revised:2007-06-09 Published:2007-11-14
  • Contact: CHEN Zhen

mSA-CS bipolar membrane was prepared by sodium alginate (SA) and chitosan (CS), which were modified by Ca2+ and glutaraldehyde (GA) as linking reagents, respectively. The viscosity of the mCS precursor solution, moisture content, and ion exchange capacity of mSA, mCS, as well as the influence of an acid-base concentration were investigated. The mSA-CS membrane was characterized by FTIR, SEM, TG and mechanism performance, and used as a separator in the electrolysis cell to produce thioglycolic acid (TGA). The experiment results showed that TGA was prepared effectively by electroreduction of dithiodiglycollic acid (DTDGA) with the mixture of TGA (w=4.61%) and DTDGA in the cathodic room. The current efficiency was up to 66.7% at room temperature with the current density of 10 mA•cm-2. Compared with the traditional of metal reduction method, the electroreduction technology saves the zinc powder and eliminates the pollution to environment.

Key words: bipolar membrane, sodium alginate, chitosan, thioglycolic acid, dithiodiglycollic acid