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首页> 外文期刊>Journal of Applied Polymer Science >Fabrication of celluloseacetate-basedradiation grafted anion exchange membranes for fuel cell application
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Fabrication of celluloseacetate-basedradiation grafted anion exchange membranes for fuel cell application

机译：纤维素基乙酸酯的植物纤维化阴离子交换膜的制备燃料电池应用

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摘要

Novel cellulose acetate-based anion exchange membranes (CA-AEM) are successfully synthesized via gamma radiation grafting as a possible renewable alternative to commercial AEMs. Using CA film precursors with degree of acetylation of 2.5, the synthesized AEM shows a high ion exchange capacity of 2.15 mmol g(-1)obtained at high degree of grafting of 45%. It was determined using thermogravimetric analysis that the radiation-grafted CA-AEM has stable amine functional groups under oxygen environment within the normal operating temperature range of alkaline fuel cells. The CA-AEM also exhibits appreciable performance over a range of temperatures, with a highest ionic conductivity of up to 0.163 S cm(-1)depending on the synthesis parameters. Results revealed that membranes prepared using gamma radiation dose of 31 kGy and above are susceptible to mechanical and dimensional instability due to increased water uptake and degree of swelling. Further study should consider the balance between grafting parameters and the desired hydrophysical properties.
机译：新型醋酸纤维素基阴离子交换膜（CA-AEM）是通过γ辐射接枝法成功合成的一种可再生的商用AEM替代品。使用乙酰化度为2.5的CA膜前体，合成的AEM显示出2.15 mmol g（-1）的高离子交换容量，在45%的高接枝率下获得。通过热重分析确定，在碱性燃料电池的正常工作温度范围内，辐射接枝的CA-AEM在氧气环境下具有稳定的胺官能团。CA-AEM在一系列温度下也表现出可观的性能，根据合成参数，其最高离子电导率高达0.163 S cm（-1）。结果表明，使用31 kGy及以上的γ辐射剂量制备的膜容易受到机械和尺寸不稳定性的影响，这是因为吸水率和膨胀程度增加。进一步的研究应该考虑嫁接参数与所需的水物理性质之间的平衡。

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