侧链型阳离子交换膜的制备与性能研究

摘要本论文制备了一系列基于磺化聚醚砜的侧链型阳离子交换膜。以4,4’-联苯二酚，双酚芴或4’4-二羟基二苯砜以及十氟联苯为原料，通过高温缩聚反应合成了非磺化聚醚砜主链聚合物，然后与1-萘酚-3，6-二磺酸钠经亲核取代反应得到了侧链型磺化聚醚砜聚合物。通过溶液浇铸制得了结实透明的阳离子交换膜，并对膜的基本性能，包括离子交换容量、吸水率、尺寸变化率、机械性能、质子电导率及水解稳定性进行了考察。结果表明：制备的侧链型阳离子交换膜IEC在1.03-1.23mmol/g，在30-90℃水中的尺寸稳定性较好，机械性能高，并且具有较低的吸水率和较好的离子电导率，PAES-B-NDS膜的吸水率、尺寸变化和质子电导率均高于PAES-A-NDS膜。30618
关键词燃料电池阳离子交换膜磺化聚芳醚砜侧链型质子电导率
毕业论文设计说明书外文摘要
Title Preparation and properties of side-chain type cation exchange membranes
Abstract
In this paper, a series of side-chain type cation exchange membranes based on sulfonated poly(aryl_ether sulfone) were prepared. With 4,4'-biphenol, 4,4'-(9-fluorenylidene) diphenol or 4,4'-hydroxy diphenyl sulphone and decafluoro biphenyl as raw material, non-sulfonated poly(aryl ether sulfone) polymers were synthesized by high-temperature polymerization, and then reacted with 1-naphthol-3,6-disulfonic acid sodium to give the final side-chain type sulfonated poly(aryl ether sulfone) copolymers by nucleophilic substitution reaction. By solution casting method, tough and transparent cation exchange membranes were obtained, and the basic properties of membrane, including ion exchange capacity, water uptake, dimensional change, mechanical properties, proton conductivity and hydrolytic stability were investigated. The results showed that: the ion exchange capacities of the prepared membranes were in the range of 1.03-1.23mmol/g with good dimensional stability in water at 30-90 oC. The membranes also exhibited good mechanical properties, low water uptakes and good ionic conductivity. The membranes of PAES-B-NDS series showed higher water uptakes, dimensional changes as well as proton conductivities than the PAES-A-NDS series.
Keywords Fuel cell Cation exchange membrane Sulfonated poly(aryl ether sulfone) Side-chain type Proton conductivity
目   次
1 绪论    3
1.1 能源危机    3
1.2 新能源    3
1.3 燃料电池    3
1.4 本论文的研究内容及意义    7
2 实验部分    8
2.1 实验所用的药品、试剂和仪器    8
2.2 药品和试剂的纯化    9
2.3 测试和表征    9
2.3.1 吸水率    9
2.3.2 尺寸变换率    9
2.3.3 水解稳定性的测定    9
2.3.4 机械性能    10
2.3.5 质子电导率    10
2.3.6 离子交换容量（IEC）    10
2.4 聚合物的合成及膜的制备    11
2.4.1 主链聚合物的合成    11
2.4.2 磺化聚合物的合成    11
2.4.3 膜的制备    12
3 结果与讨论    12
3.1 聚合物的合成及基本性能    13
3.2 吸水率、尺寸变化率    13
3.3 稳定性    16
3.4 机械性能    16
3.5 质子电导率    17
结论    18
致谢    19 侧链型阳离子交换膜的制备与性能研究:http://www.751com.cn/huaxue/lunwen_26429.html