Nafion, a solid perfluorinated polymeric sulfonic acid, reacts readily with bases and can thus be converted to a tremendous number of individual modifications. A survey of spectral, mechanical, thermal, and pervaporation characteristics of Nafion modified with simple inorganic and organic bases and with the derivatives of amino acids is thus reported. The spectral characteristics, thermal stability, and T_g changed pronouncedly for Nafion modified with the stronger bases, such as ammonium or tris(hydroxymethyl)aminomethane, while minor changes were observed for Nafion modified with the derivatives of amino acids. Permeability and selectivity of Nafion observed for the pervaporation of methanol–dimethyl carbonate and methanol–methyl acetate mixtures were mainly influenced by the modification with amines bearing hydroxyl and, most pronouncedly, sulfo groups. Importantly, the pervaporation membrane from Nafion modified with taurine appeared similarly permeable and hygroscopic but more methanol‐selective than that from pure Nafion.

中文翻译：

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用简单的碱和氨基酸衍生物修饰的Nafion：物理性质调查和寻找有效的渗透膜

Nafion是一种固态的全氟化聚合磺酸，易于与碱反应，因此可以转化为大量的单个修饰。因此，报道了用简单的无机和有机碱以及氨基酸衍生物改性的Nafion的光谱，机械，热和全蒸发特性的调查。光谱特性，热稳定性和T _g对于用强碱修饰的Nafion（例如铵或三（羟甲基）氨基甲烷）而言，Nafion的变化明显，而对用氨基酸衍生物修饰的Nafion则观察到较小的变化。Nafion对甲醇-碳酸二甲酯和甲醇-乙酸甲酯混合物的渗透蒸发所观察到的渗透性和选择性主要受带有羟基和最显着的磺基的胺改性的影响。重要的是，用牛磺酸修饰的Nafion的渗透膜表现出相似的渗透性和吸湿性，但与纯Nafion相比具有更高的甲醇选择性。