膜科学与技术

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Preparation and characterization of graphene hybrid carbon membranes with high permeability

Authors： ZHANG Bing 1*, ZHOU Jia-ling1, WU Yong-hong1, LI Lin2, WANG Tong-hua2*

Units： 1School of Petrochemical Engineering, Shenyang University of Technology, Liaoyang 111003, China; 2 State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China

KeyWords： polyimide; carbon membranes; graphene; permeability

ClassificationCode：TQ028.8

year,volume(issue):pagination： 2016,36(2):7-12

Abstract：

Hybrid carbon membranes were prepared by using 4, 4'-diaminodiphenyl ether -3, 3 ', 4, 4'-benzophenone tetracarboxylic dianhydride (BTDA-ODA) polyimide as precursor ang graphene as dopant, via the processes of blending, membrane-forming, drying and pyrolysis. The TG, SEM, XRD, IR and gas permeation technique were respectively applied to characterize the thermal stability of precursor, and the morphology, microstructure, surface chemical moieties and separation performance of carbon membranes. The effects of graphene content on the microstructure and properties of carbon membrane were investigated. Results show that the introduction of graphene leads to the enhancement of thermal stability of precursors. The resultant hybrid carbon membranes have both excellent permeability and molecular sieving ability due to the fairly well compatibility between graphene and membrane matrix. The gas permeability of hybrid carbon membranes is respectively increased by 6.8 times for H2, 46 times for CO2 and 59 times for O2. When the amount of graphene is 0.5%, the hybrid carbon membranes reveal attractive gas separation performance commercially, i.e., CO2 permeability of 1236.7 Barrer and CO2/N2 selectivity of 24.1.

Funds：

国家自然科学基金（20906063，21436009，21276035，21376037，21576035，21506020），辽宁省自然科学基金（20102170），辽宁省高校杰出青年学者培养计划项目（LJQ2012010），中国博士后第56批科学基金（2014M561232）和精细化工国家重点实验室开放基金（KF1107）。

AuthorIntro：

张兵（1977－），男，辽宁辽阳人，博士，教授，主要从事气体分离炭膜的制备与应用基础研究. *通讯作者，E-mails: bzhangdut@163.com, wangth@dlut.edu.cn.

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