高等学校化学学报2012，Vol.33Issue(8)：1842-1849,8.DOI:10.3969/j.issn.0251-0790.2012.08.037
用于燃料电池的聚乙烯醇/纤维素/聚乙二醇碱性阴离子交换复合膜的制备及性能
Synthesis and Properties of PVA/QHECE/PEG Anion-exchange Membranes for Potential Fuel Cells
摘要
Abstract
The alkaline anion-exchange membranes were developed from poly (vinyl alcohol)/quaterized hydroxyethylcellulose ethoxylate(PVA/QHECE) by incorporating polyethylene glycol(PEG) as a plasticizer using chemical and physical cross-linking method. The PVA/QHECE/PEG membranes were characterized in detail at structural and hydroxyl ion (OH-) conducting property by AC-impedance spectroscopy, FTIR spec-troscopy, scanning electron microscopy (SEM), thermal gravity analysis (TG) , gas chromatogram (GC) and tensile strength technique. The results show that the membrane flexibility and mechanical property are highly improved by incorporating PEG, especially for the membranes with high content of QHECE. The thermal stability of the membranes with PEG (300 ℃) is 40 ℃ higher than that of without PEG (260 ℃). No decreaes in OH- condutivity was observed for the membranes after conditioning in 80 ℃, 6 mol/L KOH for 264 h. On the contrary, the OH- conductivity increased from 1. 06×10-3 S/cm (before conditioning) to 3. 88×10-3 S/cm(after conditioning) , while no obvious change in water uptake was observed. In addition, the methanol permeability of the PVA/PAADDA/PEG membranes are all lower than 10-7 cmVs, which is only 1/20—1/40 of Nafion? 117 under the same measuring conditions, indicating that the membranes are promising for potential use in alkaline direct methanol fuel cells.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/聚乙二醇/共混物理-化学交联/耐碱稳定性/甲醇透过率Key words
Alkaline anon-exchange membrane/ Poly( vinyl alcohol) / Quaterized hydroxyethylcellulose ethoxylate/ Polyethyleneglycol/ Chemical and physical cross-linking/ Alkali resistance stability/ Methanol permeability分类
化学化工引用本文复制引用
刘玲玲,张璟,乔锦丽..用于燃料电池的聚乙烯醇/纤维素/聚乙二醇碱性阴离子交换复合膜的制备及性能[J].高等学校化学学报,2012,33(8):1842-1849,8.基金项目
国家自然科学基金(批准号:21173039)、高等学校博士学科点专项科研基金(批准号:20110075110001)、上海市浦江人才基金(批准号:08PJ14096)、上海市自然科学基金(批准号:09ZR1433300)和浙江省重中之重学科开放基金(批准号:20110927)资助. （批准号:21173039）
