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Modification of a Nation membrane by n-dodecyltrimethylammonium cation inclusion for potential application in DMFC

机译:正十二烷基三甲基铵阳离子夹杂物修饰国家膜的潜在应用

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摘要

Changes in a protonated Nafion-112 membrane as a result of the incorporation of the cation n-dodecyltrimethylammonium (DTA~+) by proton exchange mechanism are studied. Membrane surface modifications were analysed by AFM, XPS and contact angle measurements in order to obtain information about changes in the membrane surface roughness, chemical nature and hydrophobic character, while electrochemical impedance spectroscopy (EIS) and methanol permeation measurements were carried out to establish changes in the bulk membrane. The reduction obtained for the surface roughness and the hydrophobic character of Nafion-112/DTA~1 equilibrated membrane as well as for the fluorine atomic concentration percentage and the increase in nitrogen percentage indicates modification of Nafion-112 membrane surface, while the increase of electrical resistance and the decrease of methanol permeability give information on bulk membrane changes. The higher thermal stability and lower water loss of the Nafion-112/DTA~+ membrane are points of interest for applications such as PEMFC or DMFCs, respectively.
机译:研究了通过质子交换机制掺入阳离子正十二烷基三甲基铵(DTA〜+)导致质子化的Nafion-112膜的变化。为了获得有关膜表面粗糙度,化学性质和疏水特性变化的信息,通过AFM,XPS和接触角测量对膜表面改性进行了分析,同时进行了电化学阻抗谱(EIS)和甲醇渗透率测量来确定膜的变化。大块膜。 Nafion-112 / DTA〜1平衡膜的表面粗糙度和疏水性降低,氟原子浓度百分数和氮含量的增加表明Nafion-112膜表面发生了改性,而电性的增加抗性和甲醇渗透性的降低提供了有关体膜变化的信息。 Nafion-112 / DTA〜+膜的较高的热稳定性和较低的失水量分别是PEMFC或DMFC等应用的关注点。

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