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Nafion?-titania nanocomposite proton exchange membranes

机译:Nafion?-二氧化钛纳米复合质子交换膜

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Proton exchange membranes consisting of Nafion~? and crystallized titania nanoparticles have been developed to improve water-retention and proton conductivity at elevated temperature and low relative humidity. The anatase-type titania nanoparticles were synthesized in situ in Nafion solution through sol-gel process and the size of the formed titiania nanoparticles is in the range of 3-6 nm. The formed nanoparticles are well-dispersed in Nafion solution at the titania concentration of 5 wt %. The glass transition temperature of the formed Nafion-titania composite membrane is about 20oC higher than that of plain Nafion membrane. At elevated temperature (above 100°C), the Nafion-titania nanocomposite membrane shows higher water uptake ability and improved proton conductivity compared to pure Nafion membrane.
机译:Nafion组成的质子交换膜已经开发了结晶的二氧化钛纳米颗粒,以提高在高温和低相对湿度下的保水性和质子传导性。在Nafion溶液中通过溶胶-凝胶法原位合成了锐钛矿型二氧化钛纳米粒子,形成的二氧化钛纳米粒子的尺寸为3-6nm。将形成的纳米颗粒以5重量%的二氧化钛浓度充分分散在Nafion溶液中。形成的Nafion-二氧化钛复合膜的玻璃化温度比普通Nafion膜的玻璃化温度高约20oC。与纯Nafion膜相比,在高温(高于100°C)下,Nafion-二氧化钛纳米复合膜显示出更高的吸水能力和改善的质子传导性。

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