纳米复合材料
膜
材料科学
热稳定性
化学工程
高分子化学
碳纳米纤维
质子交换膜燃料电池
表面改性
纳米纤维
极限抗拉强度
溶剂
傅里叶变换红外光谱
复合材料
化学
有机化学
碳纳米管
生物化学
工程类
作者
Li‐Cheng Jheng,Afira Ainur Rosidah,Steve Lien Chung Hsu,Ko Shan Ho,Chun Jern Pan,Cheng-Wei Cheng
出处
期刊:RSC Advances
[The Royal Society of Chemistry]
日期:2021-01-01
卷期号:11 (17): 9964-9976
被引量:14
摘要
Carbon nanofibers functionalized with aminobenzoyl groups (CNF-aminobenzoyl) were prepared via direct Friedel-Crafts acylation in polyphosphoric acid. The functionalization of CNFs was characterized using XPS, FTIR, TGA, and Raman analyses. Hexafluoroisopropylidene-containing polybenzimidazole (6FPBI) composite membranes containing pristine CNFs or CNF-aminobenzoyl were prepared using solvent-assisted dispersion and solvent-casting methods. In this work, the influence of the incorporation of functionalized CNFs on several physicochemical properties of the 6FPBI nanocomposite membranes, including their thermal stability, mechanical strength, and acid doping level, was studied. The results showed that CNF-aminobenzoyl provided better mechanical reinforcement for the nanocomposite membrane, compared to pristine CNF. The SEM observation confirmed the good compatibility between the CNF-aminobenzoyl fillers and the 6FPBI matrix. For the 0.3 wt% CNF-aminobenzoyl/6FPBI composite membrane, the tensile stress was increased by 12% to be 78.9 MPa (as compared to the 6FPBI membrane), the acid doping level was improved to 12.0, and the proton conductivity at 160 °C was measured above 0.2 S cm-1. Furthermore, the fuel cell performance of the membrane electrolyte assembly (MEA) for each nanocomposite membrane was evaluated. The maximum power density at 160 °C was found up to 461 mW cm-2 for the MEA based on the 0.3 wt% CNF-aminobenzoyl/6FPBI composite membrane.
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