磺化聚醚醚酮/含硅二胺交联结构质子交换膜的制备与性能研究  

Preparation and Properties of SPEEK/DMS Crosslinked Proton Exchange Membranes

作　　者：赵春霞[1,2] 何达[2] 岳杰[2] 李辉[2] 李云涛[1,2] 

机构地区：[1]西南石油大学油气藏地质及开发工程国家重点实验室,成都610500 [2]西南石油大学材料科学与工程学院,成都610500

出　　处：《高分子学报》2015年第1期80-87,共8页Acta Polymerica Sinica

基　　金：四川省青年科技基金(基金号2012JQ0035);西南石油大学青年科技创新团队项目(项目号2013XJZT005);国家自然科学基金(基金号51173152)资助

摘　　要：采用含硅二胺(DMS)与磺化聚醚醚酮(SPEEK)反应,制备了交联结构质子交换膜.通过傅里叶变换红外(FTIR)和溶解实验证实交联结构的存在.采用热重分析仪(TG)、万能材料试验机和电化学综合站,研究了交联结构质子交换膜的热稳定性能、力学性能和交流阻抗.对质子交换膜的阻醇性能、水中尺寸稳定性能、吸水率、质子交换容量和质子传导率进行了详细探讨.交联改性可大幅度提高SPEEK膜的力学性能、阻醇性能以及尺寸稳定性能.通过扫描电镜(SEM)观察拉伸断面微观形貌,结果显示,DMS均匀分散在SPEEK基体中.将SPEEK/DMS交联结构质子交换膜与Nafion-117膜进行了性能对比分析,结果表明适度交联的质子交换膜具有比Nafion-117更优异的综合性能.20%的DMS对SPEEK进行交联改性后,膜的甲醇渗透系数为4.26×10-7cm2·s-1,远低于Nafion-117的1.88×10-6cm2·s-1;SPEEK/DMS-20%交联质子交换膜的有效选择性是Nafion-117的1.68倍.Crosslinked proton exchange membranes were prepared based on sulfonated poly（ether ether ketone） （SPEEK） and diamine containing silicon （DMS）. The crosslinked structure was confirmed by Fourier transform infrared spectroscopy （FTIR） and dissolution test. Thermal stability, mechanical properties and alternating current impedance measurements of crosslinked proton exchange membranes were conducted by using therogravimetric analyzer （TG） , universal material testing machine and electrochemical workstation. Methanol resistance performance, dimensional stability in water, water uptake, ion exchange capacity and proton conductivity were studied in detail. Mechanical properties, methanol resistance performance and dimensional stability of proton exchange membranes were enhanced obviously due to the crosslinking modification. Methanol permeability of SPEEK/DMS-0.5% was reduced from 5.79 × 10^ -6 cm^2 ·s^-1 to 9.42 × 10^-6 cm^2· s^ -1 Results of scanning electron microscope （SEM） observation showed the well dispersion state of DMS in SPEEK matrix. The properties comparisons were achieved between SPEEK/DMS crosslinked membranes and Nafion- 117. The crosslinked proton membranes owned better comprehensive performance compared to Nation-liT. Methanol permeability of SPEEK modified with 20% DMS was 4.26 × 10^-7 cm2 ·S^-1 ,which was much lower than Nafion-117＇ s 1.88 × 10^-6 cm^2 · s^-1. Moreover, the effective selectivity, tensile strength and Young modulus of SPEEK/DMS-20% crosslinked proton exchange membrane was 1.68,1.3 and 6.4 times of those of Nafion-117 respectively.

关 键 词：质子传导率 交联结构 磺化聚醚醚酮 阻醇性能 

分 类 号：TM911.4[电气工程—电力电子与电力传动] TQ317[化学工程—高聚物工业]