Ni-mSA/CS双极膜的制备及其在电合成巯基乙酸中的应用  

Preparation of Ni-mSA/CS bipolar membrane and its application to electro-generation of TGA

作　　者：黄振霞[1] 陈日耀[1] 郑曦[1] 陈晓[1] 陈震[1] 

机构地区：[1]福建师范大学化学与材料学院,福建福州350007

出　　处：《化工学报》2008年第1期148-152,共5页CIESC Journal

基　　金：福建省教育厅项目(JB06069;D0710009)

摘　　要：以改性海藻酸钠和壳聚糖制备Ni-mSA/CS双极膜并用于电还原制备巯基乙酸。测定了膜的红外光谱、机械性能、含水率及离子交换容量。将阴极镍网预埋在阳离子交换膜的表面上,以实现阴极室中的零极距电解。实验结果表明,以巯基乙酸和二硫代二乙酸的混合液为阴极液,25%H2SO4为阳极液,电流密度为10 mA.cm-2,常温电解,电流效率可达66.7%。Ni-mSA/CS bipolar membrane was prepared from sodium alginate and chitosan and used as a separator in the electrolysis cell to produce thioglycolic acid （TGA） . The FTIR, mechanical properties, moisture content and ion exchange capacity of membranes were investigated. The nickel net was settled down on the surface of mSA membrane to realize zero polar distance electrolysis in the cathode room. The experimental results showed that thioglycolic acid was prepared effectively by electro-reduction of dithioglycollic acid blended with thioglycolic acid in the cathode room and 25% H2SO4 as the anode electrolyte. The current efficiency was up to 66. 7% at room temperature when current density was 10mA · cm-2.

关 键 词：改性海藻酸钠 改性壳聚糖 双极膜 巯基乙酸 电合成 

分 类 号：O646.5[理学—物理化学]