Synthesis and characterization of cross-linked quaternized chitosan/poly(diallyldimethylammonium chloride) blend anion-exchange membranes
Synthesis and characterization of cross-linked quaternized chitosan/poly(diallyldimethylammonium chloride) blend anion-exchange membranes
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DOI：
10.1007/s11581-017-2280-x
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发表时间：
2018-04-01
期刊：
影响因子：
2.8
通讯作者：
Ren, Xuechao
中科院分区：
文献类型：
--
作者：
Yuan, Yuan;Shen, Chunhui;Ren, Xuechao
采用热交联和化学交联技术制备了由季铵化壳聚糖和聚二烯丙基二甲基氯化铵组成的新型碱性阴离子交换膜。测量了HTCC/PDDA-OH-膜的氢氧化物电导率(sigma)、吸水率(WU)、离子交换容量(IEC)、热稳定性、机械性能、碱性稳定性，以评价其在碱性燃料电池中的适用性。还使用 FTIR、X 射线衍射 (XRD) 和扫描电子显微镜 (SEM) 研究共混膜的内部结构和性能之间的关系。 HTCC/PDDA-OH- 膜在 80 A 摄氏度（质量比 1:0.5）时表现出高达 37.9 mS cm(-1) 的高 OH- 电导率。通过交联改性，膜表现出优异的热稳定性，起始降解温度高于200 A°C，在80 A°C的8M KOH溶液中具有良好的耐碱性，350 h内氢氧化物电导率略有下降。同时，膜表现出优异的力学性能，最大拉伸强度可达25.31 MPa，断裂伸长率为6.58%。
Novel alkaline anion-exchange membranes composed of quaternized chitosan and poly(diallyldimethylammonium chloride) were prepared by a combined thermal and chemical cross-linking technique. The hydroxide conductivity (sigma), water uptake (WU), ion exchange capacity (IEC), thermal stability, mechanical property, alkaline stability of HTCC/PDDA-OH- membranes were measured to evaluate their applicability in alkaline fuel cells. FTIR, X-ray diffraction (XRD), and scanning electron microscopy (SEM) were also used to investigate the relation between the inner structure and performance of the blend membranes. The HTCC/PDDA-OH- membranes show a high OH- conductivity up to 37.9 mS cm(-1) at 80 A degrees C (1:0.5 by mass). By cross-linking modification, the membranes exhibit excellent thermal stability with onset degradation temperature above 200 A degrees C and good alkaline resistance in 8M KOH solution at 80 A degrees C, decreasing slightly for hydroxide conductivity during 350 h. Meanwhile, the membranes show outstanding mechanical properties, the maximum tensile strength can reach 25.31 MPa and elongation at break is 6.58%.