化工学报2016，Vol.67Issue(10)：4225-4230,6.DOI:10.11949/j.issn.0438-1157.20160591
自支撑石墨烯炭膜的制备及气体分离性能
Preparation of free-standing graphene carbon membrane for gas separation
摘要
Abstract
Free-standing graphene carbon membrane with conch nacre structure was preparedvia carbonizing composite membrane of graphene oxide (GO) and polyamide acid (PAA) obtained by solvent evaporation method at 600℃. The morphology and structure were characterized by XRD and SEM. The permeation performance of CO2 and CH4 of free-standing graphene carbon membrane with different PAA solid content was investigated. The results indicated that GO was thermally reduced to graphene in graphene carbon membrane after carbonization, in which graphene layers were lamellar stacked and gaps between layers were filled with holes and carbon residue. Both CO2 permeability and ideal selectivity for the CO2/CH4 of graphene carbon membranes were enhanced with increasing PAA solid content. The CO2 flux of graphene carbon membrane was up to 824 barrer and the CO2/ CH4 ideal selectivity reached 38.9 simultaneously. The gas permeation channels of graphene carbon membrane were attributed to the lamellar stacked of graphene and carbon molecule sieve in graphene carbon membrane. This study opened up new opportunities to prepare the flexible free-standing graphene carbon membrane for gas separation.关键词
膜/分子筛/气体分离/石墨烯/炭膜/自支撑Key words
membrane/molecular sieve/gas separation/graphene/carbon membrane/free-standing分类
化学化工引用本文复制引用
张生义,李琳,王春雷,郑天赋,孙亚明,王同华..自支撑石墨烯炭膜的制备及气体分离性能[J].化工学报,2016,67(10):4225-4230,6.基金项目
国家自然科学基金项目（21436009，21576035，21506020，21376037）；中国博士后第56批科学基金项目（2014M561232）；中央高校基本科研业务费专项资金项目（DUT16RC(4)05）。@@@@Foundation item:supported by the National Natural Science Foundation of China (21436009,21576035,21506020,21376037), the China Postdoctoral Science Foundation (2014M561232) and the Fundamental Research Funds for the Central Universities (DUT16RC(4)05) （4）
