The preparation and gas separation performance of graphene/polyimide carbon membranes

被引：0
|
作者：
Hou M.-C. [1 ,2 ]
Li L. [2 ]
Lu Y.-H. [3 ]
Ran X. [4 ]
Song C.-W. [5 ]
Wang C.-L. [2 ]
Liang C.-H. [1 ,2 ]
Wang T.-H. [2 ]
机构：
[1] School of Petroleum and Chemical Engineering, Dalian University of Technology, Panjin
[2] Groups of Carbon Membrane and Porous Carbon Materials, Carbon Research Laboratory, State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian
[3] School of Chemical Engineering, University of Science and Technology Liaoning, Anshan
[4] Harbin Railway Public Security Bureau, Harbin
[5] School of Environment Science and Engineering, Dalian Maritime University, Dalian
来源：
Xinxing Tan Cailiao/New Carbon Materials | 2020年 / 35卷 / 06期
基金：
中国国家自然科学基金;
关键词：
Carbon membrane; Gas separation; Graphene oxide; In-situ polymerization;
D O I：
10.19869/j.ncm.1007-8827.20180067
中图分类号：
学科分类号：
摘要：
Graphene/polyimide carbon membranes were prepared by an in-situ polymerization method, in which the 9, 9'-bis(4-aminophenyl)fluorine (FDA), 9, 9'-bis(3-amino-4-hydroxyphenyl)fluorine (BisAHPF) and 4, 4'- (hexafluoroisopropylidene)diphthalic anhydride (6FDA) were used as the monomers and graphene oxide (GO) as the pore size regulator. FTIR, XPS, XRD, TGA, N2 adsorption and gas permeability tests were used to characterize the microstructures and properties of GO and the graphene/polyimide carbon membranes. The effect of the GO content on the microstructure and gas separation performance of the carbon membranes were investigated. Results show that the incorporation of GO into the polyimide significantly increases the total pore volume of the carbon membranes, especially the volume of ultramicropores smaller than 0.6 nm, as well as improving the thermal stability of the membranes. Compared with the polyimide carbon membrane without GO, the graphene/polyimide carbon membranes have an obvious increase in the CO2 selectivity with a high gas permeability and the selectivity increased with GO loading. The gas permeability of pure CO2 for the graphene/polyimide carbon membrane with a GO loading of 0.5 wt.% is 8 760 Barrer and its CO2 selectivities against N2 (CO2/N2) and CH4(CO2/CH4) are 52 and 53, respectively, which are 32%, and 39% higher than that of the pure carbon membrane. © 2020, Science Press. All right reserved.
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页码：762 / 768
页数：6
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