膜科学与技术

位置：首页 >> 期刊内容阅读

原位聚合法制备Nafion?/PANI复合膜及其在DMFC中的应用

作者：杨金燕¹，魏小兰²，孟辉³

单位： 1. 嘉应学院化学与环境学院，广东，梅州 514015；2. 华南理工大学化学与化工学院，广东，广州 510640；3. 中山大学光电材料与技术国家重点实验室，广东，广州 510275

关键词：

DOI号：

分类号： TM911.4; O646

出版年,卷(期):页码： 2011,31(4):22-26

摘要：

用(0.1 mol?L-1 )(NH4)2S2O8/(1 mol?L-1)盐酸溶液作引发剂，采用原位化学聚合的方法将苯胺单体聚合在Nafion®112膜基体中。扫描电镜（SEM）和能谱（EDX）测试结果表明复合膜的表面和Nafion®112膜相比有明显变化，苯胺主要聚合在膜的两侧。复合膜的红外光谱中出现明显聚苯胺（PANI）的特征吸收峰，说明苯胺成功地聚合在Nafion®112膜中。完全湿润状态下复合膜的质子电导率和Nafion®112膜相比有少许下降。甲醇渗透性能测试表明复合膜具有明显的阻醇作用，NF/PANI-2膜的甲醇渗透率值是1.83×10-6 cm2?s-1和Nafion®112膜相比降低了44%。相应地由NF/PANI-2膜组装的直接甲醇燃料电池（DMFC）开路电压值比Nafion®112膜的提高了7%，最大功率密度提高了30%。
关键词： PANI；Nafion®112膜；质子电导率；甲醇渗透率；直接甲醇燃料电池

Aniline monomer had been polymerized in Nafion®112 membrane using (0.1 mol?L-1)(NH4)2S2O8 /(1 mol?L-1) HCl solution as oxidant by an in situ chemical polymerization method. Scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDX) measurements indicated that there was an obvious difference between the plane of the composite membrane and Nafion®112 membrane, polyaniline (PANI) was mainly located in the two sides of the membrane. FT-IR spectroscopy of the composite membrane showed that the characteristic bands of PANI can be observed in it which meant PANI was successfully polymerized in Nafion®112 membrane. The proton conductivity of composite membrane was slightly lower than that of Nafion®112 membrane under completely humidity conditions, but the methanol crossover of composite membranes were obviously reduced. The permeability of NF/PANI-2 membrane was 1.83×10-6 cm2?s-1 which was 44% lower than that of Nafion®112 membrane. Correspondingly the direct methanol fuel cell (DMFC) with NF/PANI-2 membrane has a 7% higher open circuit voltage (OCV) and 30% higher maximum power density than that of Nafion®112 membrane.

基金项目：

作者简介：

杨金燕(1970-)，女，陕西人，博士，讲师，主要从事质子交换膜的研究. * 通讯联系人，E-mail: yangjinyanr@126.com

参考文献：

[1] Silav V S, Schirmer J, Reissner R, et al. Proton electrolyte membrane properties and direct methanol fuel cell performance II.Fuel cell performance and membrane properties effects[J]. J Power Sources, 2005, 140: 41-49.
[2] 任素贞，梁振兴，辛勤，等. 直接甲醇燃料电池用质子交换膜研究进展[J]. 膜科学与技术, 2005, 25(4): 51-55.
[3] San P J, Zeng C L, Zhi Q T. Layer-by-Layer Self-Assembly of Composite Polyelectrolyte-Nafion Membranes for Direct Methanol Fuell Cells[J]. Adv Mater, 2006, 18: 1068-1072.
[4] Bae B C, Ha H Y, Kim D J. Nafion®-graft-polystyrene sulfonic acid membranes for direct methanol fuel cells [J]. J Membr Sci, 2006, 276: 51-58.
[5] Chen Z W, Holmberg B, Li W Z, et al. Nafion/Zeolite Nanocomposite Membrane by in Situ Crystallization for a Direct Methanol Fuel Cell [J]. Chem Mater, 2006,18: 5669-5675.
[6] Marie E, Rothe R, Antonietti M, et al. Synthesis of Polyaniline Particles via Inverse and Direct Miniemulsion[J]. Macromolecules, 2003, 36: 3967-397.
[7] Dan A, Sengupta P K. Synthesis and Characterization of Polyaniline Prepared in Formic Acid Medium[J]. J Appl Polym Sci, 2004, 91: 991-999.
[8] Karami H, Mousavi M F, Shmsipur M. A novel dry bipolar rechargeble battery based on polyaniline[J]. J Power Sources, 2003, 124: 303-308.
[9] Gharibi H, Zhiani M, Mirzaie R A, et al. Investigation of polyaniline impregnation on the performance of gas diffusion electrode (GDE) in PEMFC using binary of Nafion and polyaniline nanofiber[J]. J Power Sources, 2006, 157: 703-708.
[10] Tan S, Be´langer D. Characterization and Transport Properties of Nafion/Polyaniline Composite Membranes[J]. J Phys Chem B, 2005, 109: 23480-23490.
[11] Roeder J, Zucolotto V, Shishatskiy S, et al. Mixed conductive membrane: Aniline polymerization in an acid SPEEK matrix[J]. J Membr Sci, 2006, 279: 70-75.
[12] Nagarale R K, Gohil G S, Shahi V K. Sulfonated poly(ether ether ketone)/polyaniline compositeproton-exchange membrane[J]. J Membr Sci, 2006, 280: 389-396.
[13] Lee C H, Park H B, Lee Y M, et al. Importance of Proton Conductivity Measurement in Polymer Electrolyte Membrane for Fuel Cell Application[J]. Ind Eng Chem Res, 2005, 44: 7617-7626.
[14] Ramya K, Dhathathreyan K S. Direct methanol fuel cells: determination of fuel crosses over in a polymer electrolyte membrane[J]. J Electroanal Chem, 2003, 542: 109-115.
[15] Liang Z X, Chen W M, Liu J G, et al. FT-IR study of the microstructure of Nafion® membrane[J]. J Membr Sci, 2004, 233: 39-44.

服务与反馈：

【文章下载】【加入收藏】

《膜科学与技术》编辑部地址：北京市朝阳区北三环东路19号蓝星大厦邮政编码：100029 电话：010-64426130/64433466 传真：010-80485372邮箱：mkxyjs@163.com