阴离子交换膜在微生物燃料电池中的应用研究
毕业论文关键词 微生物燃料电池 阴离子交换膜 交联 离子电导率
Title The study on the application of anion exchange membrane in microbial fuel cell Abstract A series of multiblock polysulfone polymers (PAES) were prepared from 4,4-difluoro-diphenol ，9,9'-bis (4-hydroxy) fluorene and 4,4 (hexafluoroisopropylidene) Bisphenol A. The - CH2Cl groups were introduced to the PAES chains by Freidel - Crafts reaction from the ClCH2OCH2CH3 under the catalysis of the SnCl4. The ionic exchange capacity (IEC) of the obtained polymer was 1.58 mmol/g, which was calculated from the 1HNMR spectra. The crosslinked structures were formed by the addition of the diamine of DABCO during the membrane casting. The insolubility characteristics in DMAc, NMP and DMF for the diamine treatment membranes ensured the form of the crosslinking structure. The properties of the membranes such as size change, water uptake, ionic conductivity, mechanical properties and stability were measured. The results showed that the membrane with 20% crosslinking ratio of bPAES-g-20 owned the excellent integration performance comparing the un-crosslinking one, which showed the ionic conductivity of 50 mS cm-1 in 60 oC water. During the MFC operation, the MFC equipped bPAES-g-20 membrane showed the electric resistant rate of 343.64Ω•m, which was much lower than that one equipped commercial membrane (862.62Ω•m). Suggesting the lower inner electric resistant of the former. Keywords : Microbial fuel cell Anionic exchange membrane Cross linking treatment ionic conductivity
目 录
1 引言 . 1
1.1 微生物燃料电池 1
1.2 阴离子交换膜 2
1.3 本文研究意义及主要内容 . 4
2 实验部分 6
2.1 实验仪器及设备 6
2.2 原料与试剂 6
2.3 药品的精制 7
2.4 嵌段型聚合物的合成 . 7
2.5 聚合物的氯甲基化 . 8
2.6 膜的制备和处理 9
2.7 性能表征 10
2.8 微生物燃料电池的构建 . 12
3. 结果与讨论 . 13
3.1 阴离子交换膜的制备 . 13
3.2 尺寸变化 14
3.3 核磁测定与IEC 13
3.4 吸水率 15
3.5 电导率 16
3.6 机械强度 17
3.7 稳定性 18
3.8 溶解性 14
3.9 在微生物燃料电池上的应用 . 18
结 论 . 20