Impact of SiO2 Modification on the Performance of Nafion Composite Membrane

IF 3.4 4区 化学 Q2 POLYMER SCIENCE
Shuangjie Liu, Jialin Yu, Yongping Hao, Feng Gao, Mo Zhou, Lijun Zhao
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引用次数: 0

Abstract

Using Nafion212 membrane and TEOS solution as raw materials, Nafion212/SiO2 composite membranes were prepared. In the in situ sol-gel reaction process, a series of Nafion/SiO2 composite membranes were prepared by varying the reaction temperature and reaction time. The effects of different modification schemes on Nafion/SiO2 composite membranes were studied using SEM, EDS, TEM, TGA, XRD, and mechanical tensile experiments, among other methods. The results show that Nafion/SiO2 composite membranes prepared at 3°C exhibit a well-separated phase structure and excellent water retention properties, with a water uptake of 29.23% and a swelling ratio of 24.25%. These membranes also demonstrate outstanding physical and chemical performance, with a maximum tensile stress of 13.6 MPa and an elongation at a break of 270%. At 110°C, the proton conductivity of the Nafion/SiO2 composite membrane reaches 0.172 S/cm, meeting the requirements for high-temperature proton exchange membrane fuel cells.
二氧化硅改性对 Nafion 复合膜性能的影响
以 Nafion212 膜和 TEOS 溶液为原料,制备了 Nafion212/SiO2 复合膜。在原位溶胶-凝胶反应过程中,通过改变反应温度和反应时间制备了一系列 Nafion/SiO2 复合膜。利用 SEM、EDS、TEM、TGA、XRD 和机械拉伸实验等方法研究了不同改性方案对 Nafion/SiO2 复合膜的影响。结果表明,在 3°C 下制备的 Nafion/SiO2 复合膜具有良好的分离相结构和优异的保水性能,吸水率为 29.23%,膨胀率为 24.25%。这些膜还具有出色的物理和化学性能,最大拉伸应力为 13.6 兆帕,断裂伸长率为 270%。在 110°C 时,Nafion/SiO2 复合膜的质子传导率达到 0.172 S/cm,符合高温质子交换膜燃料电池的要求。
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来源期刊
CiteScore
6.10
自引率
0.00%
发文量
55
审稿时长
>12 weeks
期刊介绍: The International Journal of Polymer Science is a peer-reviewed, Open Access journal that publishes original research articles as well as review articles on the chemistry and physics of macromolecules.
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