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首页> 外文期刊>Journal of industrial and engineering chemistry >Sulfonated poly(arylene ether sulfone)/Laponite-SO3H composite membrane for direct methanol fuel cell
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Sulfonated poly(arylene ether sulfone)/Laponite-SO3H composite membrane for direct methanol fuel cell

机译：直接甲醇燃料电池用磺化聚亚芳基醚砜/ Laponite-SO3H复合膜

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摘要

Polymer nanocomposite membranes based on sulfonated poly(arylene ether sulfonate) (SPAES) containing a flake filler (Laponite) with varying degrees of sulfonation, were prepared and characterized for application in direct methanol fuel cells (DMFCs). Unlike most other clays, Laponite crystals are very small in size with a very low aspect ratio (diameter to thickness ratio) of 25-30. They improve the mechanical, thermal properties and decreased the fuel permeability. However, polymer composite membranes containing non-proton conducting inorganic particles tend to show low proton conductivity, as compared with pristine polymer membranes. To resolve this problem, prior to the preparation of the composite membranes, Laponite-Na+(NLa) was sulfonated with various amounts of organo silanes (3-Mercaptopropyl trimethoxysilane (SH-silane)) via an ion exchange method. Functionalized Laponite with the organic silane compound showed higher ion exchange capacity and ion conductivity, respectively. In order to minimize the loss of proton conductivity while reducing the methanol permeability, various amounts (0.5-2.0 wt%) of the organically sulfonated Laponite (SLa) were introduced into the SPAES matrices. The performances of hybrid membranes for DMFCs in terms of mechanical properties, behavior of water in membranes, proton conductivity and methanol permeability were investigated.
机译：制备了基于磺化聚（亚芳基醚磺酸盐）（SPAES）的聚合物纳米复合膜，该膜包含具有不同磺化度的片状填料（Laponite），并进行了表征，可用于直接甲醇燃料电池（DMFC）。与大多数其他粘土不同，Laponite晶体的尺寸非常小，纵横比（直径与厚度的比）非常低，仅为25-30。它们改善了机械，热性能并降低了燃油渗透率。然而，与原始聚合物膜相比，包含非质子传导性无机颗粒的聚合物复合膜倾向于显示低质子传导性。为了解决该问题，在制备复合膜之前，通过离子交换法将Laponite-Na +（NLa）与各种量的有机硅烷（3-巯基丙基三甲氧基硅烷（SH-硅烷））磺化。具有有机硅烷化合物的官能化合成皂石分别显示出更高的离子交换容量和离子电导率。为了在降低甲醇渗透性的同时使质子传导性的损失最小化，将各种量（0.5-2.0重量％）的有机磺化Laponite（SLa）引入SPAES基体中。从机械性能，膜中水的行为，质子电导率和甲醇渗透性等方面研究了DMFC混合膜的性能。

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