| 摘要: |
| 将水热合成法制备的氨基碳点与聚酰亚胺复合得到混合基质膜。通过SEM、FT-IR、XRD和DSC考查了氨基碳点掺杂质量分数对混合基质膜形貌和结构的影响。氨基碳点表面的氨基可以提供碱性环境,同时增加了膜内的自由体积,促进CO2传递。当氨基碳点掺杂质量分数为0.3%时,混合基质膜的CO2分离性能最佳,其CO2、CH4、N2渗透通量分别为85.87 barrer、1.69 barrer、2.62 barrer,CO2/CH4、CO2/N2选择性分别为50.81和32.77。 |
| 关键词: 氨基碳点 聚酰亚胺 混合基质膜 CO2分离 |
| DOI：10.3969/j.issn.1007-3426.2021.06.007 |
| 分类号: |
| 基金项目:中国海洋石油集团有限公司重点科技项目“分子筛膜材料的开发及其在海上天然气脱H2O&CO2 分离中的应用”(CNOOC-KJ135ZDXM35TJY006-2019)；中海油能源发展股份有限公司标准前期研究项目“天然气净化高分子膜材料标准前期研究”(E-J720TZY1)。 |
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| Study on preparation of amino-carbon dots/polyimide mixed-matrix membrane and its CO2 separation performance |
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Yuan Biao1, Mao Jie2, Duan Cuijia1, Yan Shuo1, Shen Peng1
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1.Cener Tech Tianjin Chemical Research and Design Institute Co., Ltd., Tianjin, China;2. CNOOC China Limited Shanghai Branch, Shanghai, China
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| Abstract: |
| Amino-carbon dots prepared by hydrothermal method are compounded with polyimide to obtain mixed-matrix membranes. The effects of doping concentration of amino-carbon dots on the morphology and structure of membranes are investigated by SEM, FT-IR, XRD and DSC. The amino groups on the surface of the amino-carbon dots could provide alkaline environment, which increases the free volume in the membranes and then promotes CO2 transfer. When the doping concentration of amino-carbon dots is 0.3%, the CO2 separation performance of mixed-matrix membranes is best. The permeability of CO2, CH4 and N2 are 85.87 barrer, 1.69 barrer and 2.62 barrer, and the selectivity of CO2/CH4 and CO2/N2 are 50.81 and 32.77, respectively. |
| Key words: amino-carbon dots polyimide mixed-matrix membrane CO2 separation |
