高渗透性石墨烯杂化炭膜的制备及表征

膜科学与技术 , 2016, 36(2): 7-12. doi: 10.16159/j.cnki.issn1007-8924.2016.02.002

高渗透性石墨烯杂化炭膜的制备及表征

张兵 ^1, , 周佳玲 ^2, , 吴永红 ^3, , 李琳 ^4, , 王同华 ^5,

1.沈阳工业大学石油化工学院,辽阳,111003

2.沈阳工业大学石油化工学院,辽阳,111003

3.沈阳工业大学石油化工学院,辽阳,111003

4.大连理工大学化工学院,精细化工国家重点实验室,大连116024

5.大连理工大学化工学院,精细化工国家重点实验室,大连116024

基金项目: 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) 精细化工国家重点实验室开放基金(KF1107) 中国博士后第56批科学基金(2014M561232) 国家自然科学基金(20906063,21436009,21276035,21376037,21576035,21506020)

关键词：聚酰亚胺 , 炭膜 , 石墨烯 , 渗透性

Preparation and characterization of graphene hybrid carbon membranes with high permeability

Keywords： polyimide , carbon membranes , graphene , permeability

以4,4'-二氨基二苯醚-3,3',4,4'-二苯甲酮四酸二酐(BTDA-ODA)型聚酰亚胺为前体,石墨烯为掺杂剂,经共混、成膜、干燥和热解过程制备杂化炭膜.采用热失重、扫描电镜、X射线衍射、红外光谱及渗透等技术分别对前体热稳定性、炭膜微观形貌、微观结构、表面基团和气体分离性能进行分析.考察了石墨烯含量对炭膜微结构与性能的影响,结果显示,引入石墨烯使前体热稳定性提高;石墨烯与炭膜母体间兼容性良好,在大幅度提高气体渗透性同时保持了较好的分子筛分能力;掺杂石墨烯后,使炭膜对H2,CO2与O2的渗透性分别提高了6.8倍,46倍和59倍.当石墨烯质量分数为0.5％时,杂化炭膜对CO2渗透性达1236.7 Barrer,此时CO2/N2选择性达24.1,具有较好的应用前景.

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