Enhanced properties of quaternized graphenes reinforced polysulfone based composite anion exchange membranes for alkaline fuel cell
Enhanced properties of quaternized graphenes reinforced polysulfone based composite anion exchange membranes for alkaline fuel cell
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DOI：
10.1016/j.memsci.2015.03.077
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发表时间：
2015-08-01
影响因子：
9.5
通讯作者：
Lu, Changli
中科院分区：
文献类型：
--
作者：
Liu, Lingdi;Tong, Cuiyan;Lu, Changli
以氯甲基化聚砜（CMPSU）为基体，通过季铵化、碱化处理，制备了一系列新型碱性燃料电池复合阴离子交换膜。通过APTES功能化的石墨烯（A-FG）与缩水甘油基三甲基氯化铵（GDTMAC）的环氧开环反应，得到了高度剥离的季铵化石墨烯（QG）。研究了QGs含量对复合膜性能的影响。结果表明，在80 ° C下，QPSU-0.5%-QG的碳酸氢盐电导率比原始QPSU膜的碳酸氢盐电导率提高了4倍，并且QPSU-0.25%-QG的杨氏模量和拉伸强度提高了3倍。膜性能的改善可归因于QG提供的互连传递通道的形成以及QPSU和QG之间的优异相容性。此外，该复合膜还具有良好的相分离形态、良好的热性能、耐碱性和氧化稳定性、较低的吸水率和溶胀比。我们的研究表明，在聚合物基体中引入适量的QGs制备复合膜是提高阴离子燃料电池膜性能，特别是阴离子电导率和机械性能的一种简便方法。(C)2015 Elsevier B. V.版权所有。
A series of novel composite anion exchange membranes for alkaline fuel cell were prepared by incorporating quaternized graphenes (QGs) into the chloromethylated polysulfone (CMPSU), and followed by quaternization and alkalization. The highly exfoliated quaternized graphenes (QGs) were obtained by epoxide ring opening reaction of APTES-functionalized graphenes (A-FGs) with glycidyltrimethylammonium chloride (GDTMAC). The influence of the content of QGs on the properties of the obtained composite membranes was studied. The results indicated that the QPSU-0.5%-QGs showed a 4-fold improvement in the bicarbonate conductivity than that of pristine QPSU membrane at 80 degrees C, and the QPSU-0.25%-QGs showed a 3-fold increase in Young's modules and tensile strength. The performance improvement of the membranes could be attributed to the formation of the interconnected transfer channels provided by the QGs and the excellent compatibility between QPSU and QGs. In addition, the good morphologies without phase separation, acceptable thermal properties, alkaline resistances and oxide stabilities, low water uptakes and swelling ratios were also presented in the composite membranes. Our study demonstrated that the incorporation of proper content of QGs into the polymer matrix to fabricate the composite membranes is a facile way to improve the properties of the anion fuel cell membranes, especially in the anion conductivity and mechanical property. (C) 2015 Elsevier B.V. All rights reserved.