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1、嘉 应 学 院本科毕业论文本科毕业论文( (设计设计) )(2011(2011 届届) )题题 目：目： Nafion117 膜的改性研究膜的改性研究 姓姓 名：名： 殷新波殷新波 学学 号：号： 2070326117 系系 别：别： 化学与环境学院化学与环境学院 专专 业：业： 高分子材料与工程高分子材料与工程 指导教师：指导教师： 杨金燕老师杨金燕老师 申请学位：申请学位： 理学学士学位理学学士学位 嘉嘉 应应 学学 院院 教教 务务 处处 制制嘉应学院毕业论文(设计)INafion117Nafion117 膜的改性研究膜的改性研究摘要：摘要：直接甲醇燃料电池（DMFC）是近年来新开发的一
2、类质子交换膜燃料电池，它的突出特点是甲醇来源丰富，易于存储，是具有极大应用潜力的质子交换膜燃料电池。Nafion 膜在 DMFC 中具有广泛的应用，但是 Nafion 膜严重的甲醇渗透性能及昂贵的价格大大阻碍了 DMFC 的商业化进程。因此，为了实现 DMFC 的推广应用，开发新型的、具有阻醇性能的膜材料对质子交换膜燃料电池的发展具有重要意义。本文用聚吡咯（PPy）对 Nafion117 膜进行了改性研究。采用原位化学聚合法，以0.5molL-1的 FeCl3水溶液作引发剂，将吡咯单体聚合在 Nafion117 膜基体中，制备了不同的 PPy/Nafion117 复合膜。对复合膜和 Nafio
3、n117 膜进行了衰减全反射红外光谱（ATR）测试，复合膜的红外光谱图中出现明显聚吡咯的特征吸收峰，结果表明吡咯单体很好地聚合在 Nafion117 膜中。复合膜的溶胀率和含水率比 Nafion117 膜降低了，表明复合膜具有更好的尺寸稳定性和更强的憎水性能。热重测试(TG) 表明复合膜的热稳定性能提高了，PPy 与基体 Nafion117 膜之间形成了致密的稳定结构。采用气相色谱法对复合膜进行了初步的甲醇渗透性能测试，结果表明复合膜具有明显的阻醇性能。关键词：关键词：质子交换膜，PPy/Nafion117 复合膜，甲醇渗透性能嘉应学院毕业论文(设计)IIResearch on modific
4、ation of Nafion117 membraneAbstract: Direct methanol fuel cell（DMFC）was a new kind of proton exchange membrane fuel cell which developed in recent years. The outstanding characteristics of it were that methanol source was rich and the storage was easy which made it possible to have an enormous comme
5、rcial application potential. Nafion membrane was widely used in DMFC, but the expensive price and the high methanol permeability of Nafion membrane mostly restricted its commercial application process.So it was important to exploit a novel and low methanol penetration membrane for development of pro
6、ton exchange membrane fuel cell. In this paper, Nafion117 membrane was modified by polymer pyrrole(PPy). Pyrrole monomer had been polymerized in Nafion117 membrane using 0.5 molL-1 FeCl3 solution as oxidant by an in situ chemical polymerization method and a series of PPy/Nafion117 composite membrane
7、s had been fabricated. ATR spectroscopy of the composite membrane indicated that the characteristic bands of PPy could be observed in it which meant PPy had been successfully polymerized in Nafion117 membrane.The water uptake and swelling property of composite membranes were lower than that of Nafio
8、n 117 membrane which meant the composite membranes had better dimension stability and hydrophobicity. Thermogravimetric (TG) analyses indicated the thermal stability of the composite membranes were improved, a compact structure had been formed between PPy and Nafion membrane. Methanol permeability t
9、ests were also carried out, the primary results indicated the methanol permeability of composite membranes were obviously reduced.Keyword: proton exchange membrane, PPy/Nafion117 composite membrane, methanol permeability嘉应学院毕业论文(设计)III目录目录摘要摘要 .IAbstractAbstract .II1 1 前言前言.11.1 燃料电池简介 .11.2 燃料电池的基本
10、工作原理 .11.3 燃料电池的种类 .21.4 质子交换膜 .21.4.1Nafion 膜的结构 .31.4.2Nafion 膜用于 DMFC 时的甲醇渗透 .31.5 对 Nafion 膜的物理改性 .31.6 对 Nafion 膜的化学改性 .41.6.1 金属 Pd 对 Nafion 膜的化学改性.41.6.2 无机/Nafion 复合膜 .41.6.3 有机/Nafion 复合膜 .42 2 实验部分实验部分.52.1 仪器与试剂 .52.2Na117 膜的前处理 .52.3 聚吡咯的合成 .62.4 聚吡咯/117 复合膜的制备.62.5 性能测试 .62.5.1 溶胀率和含水率的测定 .62.5.2 红外光谱测试 .72.5.3 热重测试(TG) .72.5.4 阻醇性能测试 .73 3 分析与结论分析与结论.74.1 溶胀率和含水率的测定.74.2 红外光谱测试.94.3 热重测试(TG).104.4
