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摘要以摩尔比为1:1:2的BHPF、HFBPA和DFDPS为单体制备了聚醚砜高分子主链，与氯甲基乙醚通过Friedel-Crafts反应引入高活性氯甲基基团-CH2Cl，在浇膜同时，加入一定量的三乙烯二胺，成功制备一列具有不同交联度阴离子交换膜材料。结果表明：同一温度下，随着交联度的增加，吸水率呈现先上升后下降的趋势，其中具有40%交联度的rPES- DABCO-40吸水率最高(36%)；所有膜均表现出各向异性的膨胀特性，纵向尺寸明显大于径向尺寸变化，但是交联反应的引入，降低了膜的尺寸变化, rPES-DABCO-100的膜尺寸变化最小；交联反应大大提高了膜高温水解稳定性，但膜的离子电导率及机械性能仍有待提高。 27380
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毕业论文关键词 燃料电池 阴离子交换膜 交联 三乙烯二胺
Title The Preparation and properties of crosslinked anion exchange membranes Abstract A series of random poly(aryl ether sulfone) were successfully synthesized by the polymerization of 9-bis(4-hydroxyphenyl)fluorine (BHPF), 4,4’-(hexafluoroisopropylidene) diphenol (HFBPA) and 4,4’-difluorodiphenyl sulfone (DFDPS) with the molar ratio of 1:1:2. Then, the -CH2Cl groups were introduced to polymer main chain by Friedel-Crafts reaction from ClCH2OCH2CH3. A series of novel crosslinked membranes were obtained by the addition a certain amount of diamine of triethyldiamine (DABCO) during the membrane casting. The results showed that as the increase of the crosslinking degree, the water uptake (WU) increased at low crossinking degrees (below 40%) and decreased at higher crosslinking degrees (over 40%), while the rPES- DABCO-40 showed the highest WU of 36%. The membranes showed the anisotropic properties on the swelling characteristics with larger size change through plane direction than that in plane direction. However, the size change was depressed after the introduce of crossling structures, and the rPES-DABCO-100 membrane showed the smallest size change. The hydrolysis stability of the membrane was enhanced for crosslinked membranes. However, the ionic conductivity was some decreased for the crosslinked membranes. Keywords fuel cell anion exchange membrane crosslinking treatment triethyldiamine
目 录
1 绪论 1
1.1 燃料电池的工作原理与结构 .1
1.1.1 燃料电池的工作原理 .1
1.1.2 燃料电池的结构 .1
1.2 阴离子交换膜 .2
1.2.1 阴离子交换膜原理 .2
1.2.2 阴离子交换膜研究现状 .2
1.2.3 阴离子交换膜的性能要求 .2
1.2.3 阴离子交换膜分类 .3
1.2.4 阴离子交换膜的改性 .4
2.1 实验设备及仪器 .5
2.2 原料与试剂 .5
2.3 药品的精制 .6
2.4 合成无规聚醚砜聚合物 .7
2.5 聚合物的氯甲基化 .7
2.6 阴离子交换膜的制备 .8
2.7 性能表征 .9
2.7.1 尺寸变化及吸水率 .9
2.7.2 核磁共振分析 .9
2.7.3 离子电导率（） 10
2.7.4 耐碱稳定性 10
2.7.5 抗氧化性 10
2.7.6 机械性能 11
2.7.7 高温水解稳定性 11
2.7.8 离子交换容量 11
3 结果与讨论 12
3.1 聚醚砜阴离子交换膜的合成与表征 12
3.2 溶解性 14
3.3 离子交换容量 14
3.4 吸水率 15
3.5 尺寸变化 16