东北大学学报(自然科学版) ›› 2025, Vol. 46 ›› Issue (6): 113-121.DOI: 10.12068/j.issn.1005-3026.2025.20230337

• 资源与土木工程 • 上一篇    

PVDF/[Bmim][PF6]/ZIF-8混合基质膜的制备及CO2分离性能

柳静献, 王滨, 朱冕, 赫伟东   

  1. 东北大学 资源与土木工程学院,辽宁 沈阳 110819
  • 收稿日期:2023-12-18 出版日期:2025-06-15 发布日期:2025-09-01
  • 作者简介:柳静献(1966—),男,河北元氏人,东北大学教授,博士生导师.
  • 基金资助:
    国家自然科学基金资助项目(52174215);辽宁省揭榜挂帅科技攻关专项(2021JH1/10400023);浙江省重点研发计划项目(2020C03089);工信部绿色制造项目(2018LSLN001);中央高校基本科研业务费专项资金资助项目(N2301022)

Preparation and CO2 Separation Properties of PVDF/[Bmim][PF6]/ZIF-8 Mixed Matrix Membranes

Jing-xian LIU, Bin WANG, Mian ZHU, Wei-dong HE   

  1. School of Resources & Civil Engineering,Northeastern University,Shenyang 110819,China. Corresponding author: LIU Jing-xian,E-mail: liujingxian@mail. neu. edu. cn
  • Received:2023-12-18 Online:2025-06-15 Published:2025-09-01

摘要:

混合基质膜因其加工性能好、分离效率高的优势在CO2分离领域有较大的应用潜力.使用溶剂热法制备ZIF-8颗粒,将其与[Bmim][PF6]一同作为分散相,聚偏氟乙烯作为连续相,制备混合基质膜.通过比表面积与孔径分析、扫描电子显微镜、透射电子显微镜、傅里叶变换红外光谱、热重分析和力学性能测试对制备材料的物理化学性能表征,研究ZIF-8含量与跨膜压力差对膜CO2分离性能影响,评估膜长期运行的稳定性.结果表明:当ZIF-8在PVDF上的负载量(质量分数)为15%时,膜的CO2分离性能达到最优,CO2渗透系数与CO2/N2选择系数分别为679.26×10-7 cm3·cm·cm-2·s-1·MPa-1与40.33.

关键词: 混合基质膜, CO2分离, ZIF-8, 离子液体, 聚偏氟乙烯

Abstract:

Mixed matrix membranes (MMMs) have an extensive application prospect in the field of CO2 separation with good processing property and high efficiency for separation. To prepare mixed matrix membranes, ZIF-8 was prepared through solvothermal methods. ZIF-8 and [Bmim][PF6] were used as the dispersed phase, and polyvinylidene fluoride (PVDF) was served as a continuous phase. The physical and chemical properties of MMMs were characterized by BET, SEM, TEM, FT-IR, TG and mechanical property testing. The effects of ZIF-8 content and transmembrane pressure on the CO2 separation performance of the membranes were studied, and the long-time stability of membranes was investigated. The results show that the best CO2 permeability of MMMs is 679.26×10-7 cm3·cm·cm-2·s-1·MPa-1 with the CO2/N2 selectivity of 40.33 when mass fraction of ZIF-8 loaded on the PVDF is 15%, and it shows excellent CO2 separation performance.

Key words: mixed matrix membranes(MMMs), CO2 separation, ZIF-8, ionic liquid, polyvinylidene fluoride(PVDF)

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