聚合物支撑的ZIF膜材料在气体分离和水体净化领域中的应用

发布时间：2021-07-23 06:22

　　沸石咪唑骨架是由金属单元（例如Zn,Co）和有机连接体组成的多孔开放结晶材料。ZIF中的M-Im-M角与Si-O-Si角（145°）类似,这有利于合成大量具有沸石型四面体拓扑的ZIF。由于ZIFs材料具有多孔性和可调结构,其已被广泛应用于气体分离、气体储存、催化、化学传感器和污水吸附等领域。为了提高应用性,需将沸石咪唑骨架制造成膜材料。由于ZIF膜材料具有出色的分子鉴别能力,因此它们多被用于工业化实际应用中。然而,由于ZIF膜与基材的相互作用性差,晶体间的连续性较差并且膜制造成本高,很大程度上限制了此类材料的应用。此论文的目的是基于沸石咪唑骨架膜的制备,无底物修饰和有底物修饰的有效生长,以及其在气体分离和吸收污染物中的应用。因此,第一章介绍了 ZIF膜的合成,以及不同修饰底物制备方法及在各领域中的应用。第二章中介绍了采用简便有效的方法制备ZIF-8和ZIF-67两种沸石咪唑骨架LDH包覆的PAN-PVDF混合聚合物纤维。通过原位水热法将LDHs（ZnAl-LDH和CoAl-LDH）涂覆在含有电纺聚合物纤维的勃姆石（AlOOH）上。勃姆石（AlOOH）在PAN-PVDF纳米纤维中的直接电... 

【文章来源】：北京化工大学北京市 211工程院校 教育部直属院校

【文章页数】：96 页

【学位级别】：硕士

【文章目录】：
学位论文数据集
摘要
Abstract
Abbreviations
Chapter 1 Background information
    1.1 Natural gas purification
    1.2 Hydrogen purification
    1.3 Waste water purification
    1.4 Importance of Membrane base separation
    1.5 Metal organic framework (MOF)
        1.5.1 Zeolitic imidazole framework (ZIFs)
        1.5.2 Zeolitic Imidazole framework(ZIF) into membrane materials
    1.6 Different approaches toward ZIFs membrane fabrication
        1.6.1 In situ fabrication of ZIF membrane
        1.6.2 Secondary growth crystallization of MOF membrane
        1.6.3 Mixed matrix membrane(MMM)
Chapter.2 Large-Scale High Efficiency Multilevel Structure Gas Separation Membrane
    2.1 Introduction
    2.2 Experimental
        2.2.1 Materials
        2.2.2 Preparation of Solid AlOOH
        2.2.3 Electrospining of PAN-PVDF-AIOOH
        2.2.4 Heating of PAN-PVDF-AIOOH
        2.2.5 Synthesis of CoAl-LDH-PAN-PVDF-membrane
        2.2.6 Synthesis of PAN-PVDF-CoAl-LDH-ZIF-67 membrane
        2.2.7 Synthesis of ZnAl-LDH-PAN-PVDF membrane
        2.2.8 Synthesis of ZnAl-LDH-PAN-PVDF-ZIF-8 membrane
    2.3 Instrument and characterizations
    2.4 Mechanical stability of PAN-PVDF nanofiers after heating
    2.5 SEM morphology of polymer@LDH@MOF
    2.6 FT-IR and XRD
    2.7 CoAl-LDH coating on PAN-PVDF@AlOOH nanofibers
    2.8 ZnAl-LDH coating on PAN-PVDF@AlOOH mixed polymer nanofibers
    2.9 MOF fabrication on PAN-PVDF@LDH nanofibers
        2.9.1 Effect of metal source on ZIF-67 crystal
        2.9.2 Temperature effect on ZIF-8 and ZIF-67 crystal growth on PAN-PVDF@LDH membrane
    2.10 Gas separation performance of PAN-PVDF@CoAl-ZIF-67 and PAN-PVDF@ZnAl-LDH@ZIF-8
    2.11 Conclusion
Chapter 3 Multilayer,highly continuous ZIF-8 membrane on flexible PAN-PVDF polymer nanofiberes asan active candidate for water purification
    3.1 Introduction
    3.2 Experimental parts
        3.2.1 Materials
        3.2.2 Electrospining of PAN-PVDF
        3.2.3 Heating of PAN-PVDF nanofibers
        3.2.4 Synthesis of PAN-PVDF@ ZIF-8 Exfoliated multilayer membrane
    3.3 Instruments and characterization
    3.4 Membrane Morphology
    3.5 Mechanical stability of PAN-PVDF through heat mixing
    3.6 FT-IR and XRD
    3.7 Stability of ZIF-8 membrane in water and its hydrophilic nature
    3.8 BET surface area of Exfoliated ZIF-8 membrane
    3.9 Column Base dye absorption
    3.10 UV absorption of MB, MO and Rhodamine B before and after passed through column
    3.11 Dyes removal efficiency
    3.12 Conclusion
Chapter 4 Summary of Thesis
Recommendations
Research innovations
Acknowledgements
References
Author's publications
author's professional summary
Supervisor's professional summary
附件



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