Polytriazoles are considered as an excellent high-performance polymer due to their outstanding set of properties. The current investigation reports the synthesis of a phosphorus-containing fluorinated diazide monomer, that is, bis[4-(4′-azidophenoxy)-3-trifluoromethyl phenyl] phenylphosphine oxide (PFAZ) and utilization of this compound to synthesize a set of trifluoromethyl groups and phosphine oxide containing sulfonated polytriazoles (PTPFBSH-XX). The copolymers with a different level of sulfonation (-XX = −60, −70, −80, −90) were prepared by the Cu(I) catalyst-assisted click reaction of equimolar amounts of a dialkyne (BPALK) and a mixture of diazides having one sulfonated diazide (DSAZ) and PFAZ. The polymers were further characterized by NMR (¹H, ¹³C, ¹⁹F, and ³¹P) and FTIR spectroscopy. Freestanding membranes were attained from the dissolved copolymers solution in DMSO by standard solution casting route. The membranes showcased acceptable thermal and mechanical stabilities, excellent water management with a high proton conductivity, and outstanding oxidative stability. SAXS, TEM, AFM, and cross-sectional FE-SEM studies of the membranes indicated phase-separated morphology. The oxidative stabilities of the membranes ranged over 18 h. The polytriazole PTPFBSH-90 (PFAZ/DSAZ/BPALK = 10:90:100, where the degree of sulfonation is 90%) having a weight-based ion exchange capacity (IEC_W) of 2.39 mequiv g^–1 exhibited a high proton conductivity of 142 mS cm^–1 under hydrated conditions at 90 °C. Furthermore, PTPFBSH-XX polymer membranes displayed a comparable performance in microbial fuel cell as Nafion117. The chemical oxygen demand removal results indicated that the polymeric membranes could be sustainable in bioelectrochemical systems.

中文翻译：

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质子交换膜含三氟甲基和膦氧化物部分的化学稳定的磺化聚三唑

聚三唑由于其出色的性能而被认为是一种出色的高性能聚合物。当前的研究报道了含磷的氟化二叠氮单体的合成，即双[4-（4'-叠氮苯氧基）-3-三氟甲基苯基]苯基氧化膦（PFAZ）的合成，并利用该化合物合成了一组三氟甲基基团和含氧化膦的磺化聚三唑（PTPFBSH-XX）。通过Cu（I）催化剂辅助的等摩尔量的丁二炔（BPALK）和乙二胺的混合物的点击反应制备具有不同磺化水平（-XX = -60，-70，-80，-90）的共聚物具有一个磺化叠氮化物（DSAZ）和PFAZ的叠氮化物。通过NMR（¹ H，¹³ C，¹⁹F和³¹ P）和FTIR光谱。通过标准溶液流延路线，从溶于DMSO的共聚物溶液中获得独立的膜。这些膜表现出可接受的热稳定性和机械稳定性，出色的水管理性，高质子传导性和出色的氧化稳定性。膜的SAXS，TEM，AFM和横截面FE-SEM研究表明相分离的形态。膜的氧化稳定性超过18小时。重量基离子交换容量（IEC _W）为2.39 mequiv g ^–1的聚三唑PTPFBSH-90（PFAZ / DSAZ / BPALK = 10：90：100，其中磺化度为90％）具有高质子传导性142 mS cm ^–1在90°C的水合条件下。此外，PTPFBSH-XX聚合物膜在微生物燃料电池中表现出与Nafion117相当的性能。化学需氧量去除结果表明，聚合物膜在生物电化学系统中可能是可持续的。