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1SBS-g-PAA/SBS-g-PAM双极膜的制备及在成对电合成乙醛酸中的应用

发表时间:2009-11-30  浏览量:1219  下载量:463
全部作者: 黄雪红,林埔,柯盛波,郑若男,陈震
作者单位: 福建师范大学化学与材料学院;福建中医学院药学系
摘 要: 采用自由基接枝聚合反应,在SBS主链上引入丙烯酸(acrylicacid,AA)链段作为阳膜;引入丙烯酰胺(acrylamide, AM)基团,经Mannich反应后,得到含叔胺基团的SBS接枝共聚物作阴膜,用流延法制备了SBS-g-PAA/SBS-g-PAM双极膜(SBS-g-AA/SBS-g-PAM bipolar membrane, SBS BPM)。用红外(infrared, IR)光谱和扫描电镜(scanning electron microscope, SEM)作膜成分与形态表征,测定了各因素对膜溶胀度的影响。将SBS BPM作为阴阳两室隔膜,应用于成对电解制备乙醛酸。实验结果表明:以饱和草酸和盐酸的混合液作阴极液,以10%乙二醛和10%KBr的混合液作阳极液,铅为阴极,石墨为阳极,电流密度为18.8 mA/cm2常温下电解,阴极平均电流效率可达76.8%,阳极平均电流效率为73.4%.
关 键 词: 材料科学基础学科;苯乙烯-丁二烯-苯乙烯嵌段共聚物;接枝共聚物;双极膜;含水率;离子交换量
Title: Preparation of SBS-g-AA/SBS-g-PAM bipolar membrane and its application in paired electrosynthesis of glyoxylic acid
Author: HUANG Xuehong,LIN Pu,KE Shengbo,ZHENG Ruonan,CHEN Zhen
Organization: College of Chemistry and Materials Sciences, Fujian Normal University;Pharmacy Department, Fujian University of Traditional Chinese Medicine
Abstract: SBS-g-AA/SBS-g-PAM bipolar membrane (SBS BPM) was prepared by SBS doped acrylic acid (AA) through free radical grafting reaction as the anode membrane, and SBS doped acrylamide (AM) through Mannich reaction as the cathode membrane, respectively. The component and morphology of SBS BPM were characterized by infrared (IR) spectra and scanning electron microscope (SEM), and the effects of some factors on swelling degree of the membrane. When the grafting degree of trialkylamine SBS-g-PMA was 23.8%, the water contenting rate, contact angle, ion exchange capacities of the cathode membrane were 51.1%, 53.1� 1.15mmol/g, respectively. The experiment used SBS BPM as a separator between the cathode and anode chamber in the electrolysis cell to produce glyoxylic acid in pairs. The experiment results show that the mixture of saturation oxalic acid and HCl as cathode electrolyte, the mixture of 10% glyoxal and 10% KBr as anode electrolyte, Pb as cathode, graphite as anode, the cathode and anode chamber average current efficiency were 76.8% and 73.4% respectively at the room temperature during the current density was 18.8 mA/cm2.
Key words: foundational discipline in materials science; styrene-butadience-styrene triblock copdymer; trialkylamine SBS-g-PAM; graft copolymer; bipolar membrane; water contenting rate; ion exchange capacity
发表期数: 2009年11月第22期
引用格式: 黄雪红,林埔,柯盛波,等. 1SBS-g-PAA/SBS-g-PAM双极膜的制备及在成对电合成乙醛酸中的应用[J]. 中国科技论文在线精品论文,2009,2(22):2378-2385.
 
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