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Poly(arylene ether ketone) with an Ultrahigh-Selectivity Hydrophilic Phase Proton Transport Channel by Grafting Sulfonated Benzotriazole Groups onto Pendant Chains
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2020-04-14 , DOI: 10.1021/acssuschemeng.0c01137
Wenchang Liu 1, 2 , Zhe Wang 1 , Xinming Du 1 , Jingmei Xu 1 , Chang Liu 1 , Haiqiang Li 1 , Zhaoyu Chen 1 , Chunmei Wang 1 , Hao Chen 1 , Li Chen 2
Affiliation  

The practice of site control for functional groups to achieve better interactions has become popular in recent years. Capitalizing on such developments, sulfonated 5-carboxybenzotriazole (SCBTA), serving as a new monomer that combines multiple functional groups, is grafted onto pendant chains of poly(arylene ether ketone) (PAEK) via an amidation reaction to fabricate a series of novel proton-exchange membranes (NmAn-SCBTA). The structure of the resulting membranes is confirmed by 1H NMR and Fourier transform infrared (FT-IR). Transmission electron microscopy (TEM) and small-angle X-ray spectroscopy (SAXS) analyses reveal well-defined microphase-separated structures. Among these samples, a membrane having an amino bisphenol monomer content of 70% (N7A3-SCBTA) exhibits high conductivity (0.089 S·cm–1, at 90 °C), oxidative stability (95.7%), and tensile strength (65.74 MPa), while its selectivity is as high as 91.9 × 104 S·s·cm–3 at 25 °C; this value is even more than 27 times that of recast Nafion (3.3 × 104 S·s·cm–3). These results indicate that there is great potential for these membranes to be used in direct methanol fuel cells (DMFCs).

中文翻译:

通过将磺化苯并三唑基团嫁接到悬垂链上的超高选择性亲水相质子传输通道的聚(亚芳基醚酮)

近年来,功能组进行站点控制以实现更好的交互的做法已经流行。利用这种发展,磺化的5-羧基苯并三唑(SCBTA)作为一种结合了多个官能团的新型单体,通过酰胺化反应接枝到聚(亚芳基醚酮)(PAEK)的侧链上,从而制造出一系列新型质子交换膜(N m A n -SCBTA)。所得膜的结构由1确认1 H NMR和傅立叶变换红外光谱(FT-IR)。透射电子显微镜(TEM)和小角度X射线光谱(SAXS)分析显示了定义明确的微相分离结构。在这些样品中,氨基双酚单体含量为70%(N7A3-SCBTA)的膜表现出高电导率(0.089 S·cm –1,在90°C下),氧化稳定性(95.7%)和拉伸强度(65.74 MPa) ),而其选择性在25°C时高达91.9×10 4 S·s·cm –3;该值甚至是重铸的Nafion的27倍(3.3×10 4 S·s·cm –3)。这些结果表明这些膜在直接甲醇燃料电池(DMFC)中有很大的潜力。
更新日期:2020-04-23
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