膜科学与技术

聚醚砜-纳米二氧化硅气体分离复合膜性能的研究

作者：陈桂娥¹，张丽¹，许振良²

单位： 1上海应用技术学院化学与环境工程学院，上海 200235；2华东理工大学化工学院，上海200237

关键词：中空纤维复合膜；聚醚砜；二氧化硅；气体分离

出版年,卷(期):页码： 2012,32(4):38-43

摘要：

本文研究了纳米二氧化硅（SiO2）颗粒的添加对聚醚砜-纳米二氧化硅气体分离复合膜气体渗透性能的影响。采用SEM、机械性能和气体分离性能等评价手段表征了膜的微观结构、力学性能及分离性能。结果表明：随着SiO2添加量的增加，杨氏模量增大，H2、N2、O2、CH4和CO2气体的渗透通量增大，但O2/N2，CO2/CH4和H2/N2的分离因子有所降低；中空纤维气体分离复合膜在放置一段时间后，性能趋于稳定；制备好的膜以乙醇和正己烷为交换剂，在烘箱中烘干作为后处理方式能够使膜具有较好的分离性能。

In this study, the effect of silica nanoparticles on the gas permeation properties of polyethersulfone gas separation membrane was investigated. The membranes’ microstructure, mechanical properties and gas separation performance were investigated by SEM, tensile tester and gas separation experiment. The results showed that Young’s modulus of PES-SiO2 hollow fiber membranes and permeation fluxes of H2, N2, O2, CH4 and CO2 increased whereas separation factors of O2/N2, CO2/CH4 and H2/N2 decreased with the increase of SiO2 contents. The hollow fiber membranes tended to stable after the testing period of 16 days. When the membranes were treated by ethanol and n-hexane as exchange agent, dried in the oven, the membranes had a better selectivity.

陈桂娥( 1965 - ) , 女, 湖北黄梅人, 博士, 副教授, 从事膜分离技术方面的研究。通信联系人：许振良, E-mail: chemxuzl@ecust.edu.cn

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