交联聚苯乙烯-丁二烯-苯乙烯双极膜的制备及其在电合成环氧丁二酸中的应用  

Preparation of Cross-linking Styrene-butadiene-styrene Triblock Copolymer Hybrid Bipolar Membrane and Its Application in Electro-generation of Trans-2,3-oxiranedicarboxylic Acid

作　　者：黄雪红[1] 柯盛波[1] 冀敏[1] 

机构地区：[1]福建师范大学化学与材料学院 高分子材料重点实验室,福州350007

出　　处：《应用化学》2010年第11期1306-1312,共7页Chinese Journal of Applied Chemistry

基　　金：福建省科技厅福建省自然科学基金(2009J05024);福建省高分子材料重点实验室开放基金(200802);福建师范大学本科生课外科技计划(BKL2009-049)资助项目

摘　　要：以聚苯乙烯-丁二烯-苯乙烯(SBS)嵌段共聚物作为基膜材料,采用自由基接枝聚合反应,在SBS主链上引入丙烯酸(AA)、苯乙烯磺酸和γ-甲基丙烯酰氧基丙基三甲氧基硅烷(KH570)链段作为阳离子交换膜;引入丙烯酸二甲基胺基乙酯和KH570链段作阴离子交换膜,阴、阳离子交换膜经KH570结构中三甲氧基硅烷基团的水解缩合,得到含硅氧交联网的SBS接枝离子交换膜,用流延法制备了SBS双极膜。测得SBS阴膜和阳膜的吸水率分别为63.9%和72.8%,SBS阴膜和阳膜的离子交换容量分别为1.51和2.71mmol/g。将SBS双极膜作为阴阳两室隔膜,采用钨酸钠/过钨酸钠体系由阴极间接电氧化合成了环氧丁二酸。结果表明,以石墨为阴、阳电极,电流密度为2.0×10-2A/cm2、50℃反应4h,环氧丁二酸的产率为53.0%,电流效率为40.8%。The cross-linking SBS hybrid bipolar membrane（SBS BPM） was prepared by free radical reaction of SBS（styrene-butadiene-styrene triblock copolymer） with acrylic acid（AA）,sulfonic styrene（StSO3H） and γ-methacryloxypropyltrimethoxysilane（KH-570） as the anode membrane,and reaction of SBS with dimethyl amino ethyl methacrylate（DMAEMA） and KH-570 as the cathode membrane.Cross-linking reaction was carried out through sol-gel reaction of trimethoxysilane group.SBS BPM exhibited high temperature tolerance（thermal degradation temperature in N2,Td was up to 186.5 ℃）.The ion exchange capacities（IECs） of the anode and cathode membranes were 1.51 and 2.71 mmol/g,respectively.SBS hybrid bipolar membranes were used as the separator in the electrolysis cell,then using tungstate/pertungstate as the media to indirect electrooxidate maleic acid to prepare trans-2,3-oxiranedicarboxylic acid in the cathode chamber.Graphite was used as the anode and cathode electrode.At 50 ℃ and when the current density was 2.0 × 10-2 A/cm2 for 4 h,the yield and average current efficiency of trans-2,3-oxiranedicarboxylic acid were 53.0% and 40.8%,respectively.

关 键 词：SBS杂化双极膜 间接电氧化 钨酸钠/过钨酸钠 环氧丁二酸 

分 类 号：O631.5[理学—高分子化学]