膜科学与技术

Pebax/[Bmim][PF6]共混膜的制备及性能研究

作者：邱永涛¹，²，任吉中¹，，赵丹¹，李晖¹，花开胜¹，王颖¹，黄雪飞³，邓麦村¹

单位： 1. 洁净能源国家实验室, 大连化学物理研究所, 大连 116023; 2. 中国科学院大学, 北京 100049; 3.合肥江航飞机装备有限公司, 合肥 230051

关键词： Pebax;共混膜;离子液体

出版年,卷(期):页码： 2016,36(5):9-15

摘要：

选用聚醚共聚酰胺(Pebax1657)和1-丁基-3-甲基咪唑六氟磷酸盐([Bmim][PF6])为膜材料,以1-丁醇为溶剂,通过流延成膜法制备Pebax1657/[Bmim][PF6]共混膜. FTIR和XRD分析结果表明: [Bmim][PF6]的引入,破坏了Pebax1657链段间原有的氢键,造成共混膜结晶度降低;而随着[Bmim][PF6]质量分数的增加, N2、CH4、H2和CO2渗透系数逐渐降低.温度、压力和[Bmim][PF6]的含量对Pebax1657/[Bmim][PF6]共混膜中N2、CH4、H2和CO2渗透性能的影响表明:随着操作压差变化, CO2和非极性气体的渗透系数呈现不同的变化趋势; N2、CH4、H2和CO2的渗透系数都随着温度的升高而增大,且它们的渗透活化能随着[Bmim][PF6]含量的增加呈增加趋势.

In this paper, Pebax1657/1-butyl-3-methylimidazolium hexafluorophosphate ([Bmim][PF6]) blend membranes with different content of [Bmim][PF6] were prepared via solution casting and solvent evaporation method. Physical properties of blend membranes were characterized by Fourier Transform Infrared Spectroscopy (FTIR) and X-ray diffraction (XRD). Results indicated that the hydrogen bond was destroyed, and the crystallization ability decreased. The effect of [Bmim][PF6] content, operating temperature and pressure on the gas (N2, CH4, H2 and CO2) permeabilities was evaluated. With the increase of [Bmim][PF6] content, the permeabilities of N2, CH4, H2 and CO2 decreased. The effect of pressure on the CO2 and non-polar gas permeabilities was different. With the increase of temperature, the permeabilities of N2, CH4, H2 and CO2 increased, similarly, the apparent activation energies of N2, CH4, H2 and CO2 increased.

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