Guanidine分子在燃料电池用阴离子交换膜中的应用

发布时间：2018-03-01 08:32

  本文关键词： 季铵化壳聚糖 Guanidine分子 阴离子交换膜 燃料电池　出处：《高分子材料科学与工程》2017年07期 　论文类型：期刊论文

【摘要】：以壳聚糖(CS)和2,3-环氧丙基三甲基氯化铵(GTA)为原料,制备季铵化壳聚糖(QCS),将其与小分子游离胍(Guanidine)共混,借助戊二醛(GA)的化学交联作用,将季铵化壳聚糖中的氨基以及胍中的氨基交联,形成网状结构,由此制得含有不同含量Guanidine分子的交联QCS-G阴离子交换膜。实验过程中,对该膜的含水率、溶胀度、力学强度、电导率及耐碱稳定性等进行了详细的考察。结果表明,游离胍的引入可有效地提高膜的电导率和耐碱稳定性,同时降低了膜的溶胀度及含水率。其中小分子游离胍质量分数为2.5%的膜(QCS-G2.5%)在70℃时的电导率可达到6.58×10~(-2)S/cm;在10 mol/L NaOH溶液中浸渍72 h后该膜70℃测得的电导率损失仅为3.8%,离子交换量损失仅为3.82%,表明该膜的耐碱性能较好。
[Abstract]:Quaternary ammonium chitosan (Quaternary chitosan) was prepared from chitosan (CSN) and 2-trimethylammonium trimethylammonium chloride (GTAA). The quaternary chitosan was blended with Guanidine (a small molecule of free guanidine). The chemical crosslinking of quaternary chitosan and guanidine was studied by means of glutaraldehyde (GA). The cross-linked QCS-G anion exchange membrane containing different contents of Guanidine molecules was prepared by crosslinking the amino in quaternary chitosan and the amino group in guanidine. During the experiment, the moisture content, swelling degree and mechanical strength of the membrane were determined. The results show that the introduction of free guanidine can effectively improve the conductivity and alkali-resistant stability of the membrane. At the same time, the swelling degree and moisture content of the membrane were reduced. The conductivity of the membrane QCS-G2.5 with small molecular free guanidine content of 2.5%) could reach 6.58 脳 10 ~ (-2) C ~ (-1) S / cm at 70 鈩，

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