接枝侧链型磺化聚芳醚质子交换膜的制备及其性能研究
毕业论文关键词 燃料电池，质子交换膜，侧链磺化，磺化聚芳醚，含氟聚合物
Title Preparation and properties of proton exchange membranes basedon side-chain type fluorinated poly(arylether)s bearing sulfonatednaphthanoxyl pendants
Abstract Proton exchange membrane is one of the key components for the polymer electrolytemembrane fuel cell, which requires high conductivity, thermal and chemicalstability, mechanical toughness as well as low cost. Borrowing ideas from theunique structure of perfluoro-hydrophobic backbone and sulfonated hydrophilicside chain for perfluorosulfonic acid membranes, several proportion of backboneand side-chain type sulfonated partially fluorinated poly(aryl ether) copolymerswere developed.A series of novel side-chain type partially fluorinated sulfonated poly(ethersulfone)s (sSPFAES) copolymers were successfully synthesized mainly bynucleophilic substitution reaction from decafluorobiphenyl(HFBP),4,4’-biphenol, 9,9’-biphenylfluorene,BP,SDFDPS,potash,etc. Ion exchangecapacities (IECs) of the sSPFAES membranes were about0.85~1.60 mmol/g, all weretough and ductile, exhibiting Young’s modulus higher than 1.33 GPa, tensilestrength of 35.8-42.2 MPa and elongation at break of 18.6-50%. They also showedgood thermal and oxidative stability.They also showed good hydrolyticstability,after 24h inthe water which is 140℃,the membranes still showed good strength.The water absorbing and swelling behavior tests indicate that the obtained sSPFAESmembranes had rather low water uptakes and good dimensional stability, with wateruptake of 11.7-75.7%, swelling ratios of 0.2-13.9%(△l) and 5.3-26.6%(△t) atthe testing temperature range of 30~90℃. They all also showed good protonconductivity .
Keywords Fuel cell, proton exchange membrane, side-chain sulfonation, sulfonatedpoly(aryl ether), fluorinated polymers
目次
1绪论1
1.1燃料电池的分类1
1.2燃料电池特点2
1.3燃料电池的应用2
1.5本课题拟解决的问题6
2实验材料与试验方法7
2.1实验药品与试剂7
2.2实验仪器及设备7
2.2药品提纯及试剂精制8
2.3实验表征方法8
2.4侧链型含氟磺化聚芳醚砜质子交换膜的制备10
3结果与讨论.13
3.1IEC，吸水率和尺寸变化.13
3.2质子导电率16
3.3机械性能16
3.4抗氧化稳定性17
3.5水解稳定性17
3.6溶解性18
结论19
致谢20
参考文献21
1 绪论20 世纪以来，石油等能源危机日益严重，人们开始重视高效环保的能源，很多国家积极地投入人力物力研发各种民用燃料电池。直到现在，燃料电池已经在汽车，飞机等方面得到应用（2010 年3 月在第六届国际氢燃料电池展上，来自世界各地的多家公司展示了大量的便携或小型发电式燃料电池产品） 。