| 化学交联聚乙烯醇改性纤维素碱性阴离子交换复合膜的制备与性能 |
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| 引用本文： | 刘玲玲,丁蕾,徐莉,乔锦丽,盛嘉伟.化学交联聚乙烯醇改性纤维素碱性阴离子交换复合膜的制备与性能[J].物理化学学报,2011,27(11):2665-2670. |
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| 作者姓名： | 刘玲玲 丁蕾 徐莉 乔锦丽 盛嘉伟 |
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| 作者单位： | 1. College of Environmental Science and Engineering, Donghua University, Shanghai 201620, P. R. China;
2. College of Chemical Engineering and Materials, Zhejiang Industrial University, Hangzhou 310032, P. R. China |
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| 基金项目： | 国家自然科学基金，上海市浦江人才基金，上海市自然科学基金，浙江省重中之重学科开放基金，教育部归国留学人员基金，上海市重点学科项目 |
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| 摘 要： | 高稳定性碱性阴离子交换膜的制备已成为碱性固体电解质膜研究领域的一大热点.本文通过聚乙烯醇化学交联改性制备出了季铵化羟乙基乙氧基纤维素碱性阴离子交换膜（PVA/QHECE）.采用傅里叶变换红外（FTIR）光谱、热重（TG）分析、交流（AC）阻抗等方法考察了复合膜的分子结构、热稳定性、耐碱稳定性及离子电导率等性能.详尽考察了交联时间、交联剂含量、聚合物组成对成膜力学强度、含水率以及OH-电导率的影响.实验结果表明:随着交联时间的增加,膜的溶胀率降低,力学强度随之增强,而离子电导率随膜含水率的降低没有发生明显变化,室温下OH-的电导率在3.26×10-4-4.44×10-4S·cm-1范围内变化.热重分析结果显示:掺入42.9%的QHECE时,膜的热分解温度达260℃.此外,将PVA/QHECE膜在6 mol·L-4 KOH浓碱溶液中80℃浸渍处理168 h,膜的电导率从4.90×10-4S·cm-1提高到9.68×10-4S·cm-1,而膜的外观和力学强度以及含水率未发生明显变化,这一结果表明该膜具有很好的耐碱化学稳定性,有望作为一种新型的碱性燃料电池用离子交换膜.
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| 关 键 词： | 碱性阴离子交换膜 聚乙烯醇 季铵化羟乙基乙氧基纤维素 共混化学交联 OH-电导率 耐碱稳定性 |
| 收稿时间： | 2011-06-13 |
| 修稿时间： | 2011-08-30 |
Synthesis and Properties of Chemically Cross-Linked Poly(vinyl alcohol) Modified Quaterized Hydroxyethylcellulose Ethoxylate as Novel Alkaline Anion-Exchange Membrane |
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| LIU Ling-Ling,DING Lei,XU Li,QIAO Jin-Li,SHENG Jia-Wei.Synthesis and Properties of Chemically Cross-Linked Poly(vinyl alcohol) Modified Quaterized Hydroxyethylcellulose Ethoxylate as Novel Alkaline Anion-Exchange Membrane[J].Acta Physico-Chimica Sinica,2011,27(11):2665-2670. |
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| Authors: | LIU Ling-Ling DING Lei XU Li QIAO Jin-Li SHENG Jia-Wei |
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| Institution: | 1. College of Environmental Science and Engineering, Donghua University, Shanghai 201620, P. R. China;
2. College of Chemical Engineering and Materials, Zhejiang Industrial University, Hangzhou 310032, P. R. China |
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| Abstract: | Much attention has been paid to alkaline ion-exchange membranes with high alkaline stability.In this work,chemically cross-linked polyvinyl alcohol) modified quaterized hydroxyethylcellulose ethoxylate (PVA/QHECE) membranes were prepared and evaluated as OH-conducting polymer electrolytes.The membranes were characterized using Fourier transform infrared(FTIR) spectra,thermogravimetric(TG) analysis,and the alternating current(AC) impedance technique as for their inner structure,thermal stability, alkaline re... |
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| Keywords: | Alkaline anion-exchange membrane PVA QHECE Blending and chemical cross-linking OH~- conductivity Alkaline resistance stability |
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