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首页> 外文期刊>Polymers for advanced technologies >Surface modified multi‐walled carbon nanotubes and NafionNafion nanocomposite membranes for use in fuel cell applications
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Surface modified multi‐walled carbon nanotubes and NafionNafion nanocomposite membranes for use in fuel cell applications

机译：表面修改多壁碳纳米管和 nafion Nafion纳米复合材料用于燃料电池应用的膜

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> The preparation and characterization of the nanocomposite polyelectrolyte membranes, based on Nafion, sulfonated multi‐walled carbon nanotubes (MWCNT‐SO 3 H) and imidazole modified multi‐walled carbon nanotubes (MWCNT‐Im), for direct methanol fuel cell applications is described. The results showed that the modification of multi‐walled carbon nanotubes (MWCNT) with proton‐conducting groups (sulfonic acid groups or imidazole groups) could enhance the proton conductivity of the nanocomposite membranes in comparison to Nafion 117. Regarding the interactions between the protonated imidazole groups, grafted on the surface of MWCNT, and the negatively charged sulfonic acid groups of Nafion, new electrostatic interactions can be formed in the interface of the Nafion and MWCNT‐Im, which result in both lower methanol permeability and higher proton conductivity. The physical characteristics of these manufactured nanocomposite membranes were investigated by thermogravimetric analysis, differential scanning calorimetry, Fourier transform infrared spectroscopy, water uptake, methanol permeability, and ion exchange capacity, as well as proton conductivity. The Nafion/MWCNT‐Im membranes showed the higher proton conductivity, lower methanol permeability, and, as a consequence, a higher selectivity parameter in comparison to the neat Nafion or Nafion membrane containing MWCNT‐SO 3 H or ─OH functionalized multi‐walled carbon nanotubes (MWCNT‐OH) membranes. The obtained results indicated that the Nafion/MWCNT‐Im membranes could be used as efficient polyelectrolyte membranes for direct methanol fuel cell applications.
机译： >纳米复合材料聚电解质膜的制备和表征，基于Nafion，磺化描述了多壁碳纳米管（MWCNT-SO 3 H）和咪唑改性的多壁碳纳米管（MWCNT-IM），用于直接甲醇燃料电池应用。结果表明，与Nafion 117相比，具有质子传导基团的多壁碳纳米管（MWCNT）与质子传导基团（磺酸基或咪唑基）的改性可以增强纳米复合膜的质子电导率。关于质子化咪唑之间的相互作用接枝在MWCNT的表面上的基团和Nafion的带负电荷的磺酸基团，可以在Nafion和MWCNT-IM的界面中形成新的静电相互作用，这导致较低的甲醇渗透性和更高的质子电导率。通过热重分析，差示扫描量热法，傅里叶变换红外光谱，水吸收，甲醇渗透性和离子交换能力研究了这些制造的纳米复合膜的物理特性，以及质子电导率。 Nafion / MWCNT-IM膜显示质子电导率越高，甲醇渗透性较高，以及与含有MWCNT-SO 3 3或─OH官能化多壁碳纳米管（MWCNT-OH）膜。所得结果表明，Nafion / MWCNT-IM膜可用作用于直接甲醇燃料电池应用的有效聚电解质膜。

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