Synthesis and characterization of highly fluorinated sulfonated polytriazoles for proton exchange membrane application
作者:Asheesh Singh、Susanta Banerjee、Hartmut Komber、Brigitte Voit
DOI:10.1039/c5ra26821d
日期:——
The PTFQS-XX membranes were prepared by dissolving the salt form of the copolymers in dimethyl formamide. The physical properties and proton conductivity of the membranes were investigated. The presence of hexafluoroisopropylidene groups in the copolymers contributed to high thermal and oxidative stability and low swelling of the membranes. TEM micrographs of the polytriazole membranes showed a good
通过1,1,1,1,3,3,3-六氟-2,2-双(4-(丙-2-炔氧基)苯基)丙烷(1,1,1,1,3,3,3-六氟的点击聚合)合成了一系列聚三唑共聚物(PTFQSH- XX) TF)与两种重氮单体的混合物:4,4-双[3-三氟甲基-4(4-叠氮苯氧基)苯基]联苯(QAZ)和4,4'-二叠氮基2,2'-二磺酸二钠盐(“ S”)。通过调节“ S”与非磺化二叠氮化物(QAZ)的摩尔比来控制共聚物的磺化度(DS)。通过FTIR和NMR(1 H,13 C和19 F)光谱对聚三唑共聚物进行表征。PTFQS- XX通过将共聚物的盐形式溶解在二甲基甲酰胺中来制备膜。研究了膜的物理性质和质子传导率。共聚物中六氟异亚丙基的存在有助于提高膜的热稳定性和氧化稳定性以及低溶胀性。聚三唑膜的TEM显微照片显示出良好的相分离形态,离子簇在3–75 nm范围内。在80°C的水中,氟化膜的质子电导率在27–136 mS cm