芳烯
苯并三唑
乙醚
膜
单体
酮
选择性
高分子化学
Nafion公司
直接甲醇燃料电池
化学
傅里叶变换红外光谱
热稳定性
聚合物
化学工程
材料科学
有机化学
物理化学
阳极
催化作用
芳基
烷基
电极
工程类
生物化学
电化学
作者
Wenchang Liu,Zhe Wang,Xinming Du,Jingmei Xu,Chang Liu,Haiqiang Li,Zhaoyu Chen,Chunmei Wang,Hao Chen,Li Chen
出处
期刊:ACS Sustainable Chemistry & Engineering
[American Chemical Society]
日期:2020-04-04
卷期号:8 (16): 6505-6516
被引量:22
标识
DOI:10.1021/acssuschemeng.0c01137
摘要
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).
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