本文利用雙親性離子液體1-十六烷基-3-甲基咪唑鹽（IL）和經IL改性后的具有不同長徑比的碳納米管（IL/MWCNT）,通過溶液共混的方式,分別制備了PVDF共混物和納米復合材料,同時利用FESEM, FTIR-ATR,XRD,POM, DMA, DSC等設備對上述共混物和納米復合材料進行表征,并測試其物理機械性能。本文的研究重點為了解長烷基鏈離子液體和IL/MWCNT對PVDF結晶性能的影響,以及該影響對制備的共混物和納米復合材料的作用。本文研究了IL對PVDF共混物體系結晶性能、晶體結構、球晶增長速率和球晶形態(tài)的影響,研究表明,PVDF的結晶行為隨著IL添加量的變化表現出不同的狀態(tài),當IL添加量為1%時,IL在PVDF共混體系中可以視為軟質成核劑,促進體系的結晶,但是當其添加量>1%時,IL的增塑作用比較明顯,造成上述結晶性能變化的原因為,在較高的溫度下IL可以形成一種反膠束,該反膠束可以促進PVDF生成β/γ結晶。同時通過POM觀察沒有發(fā)現雙折射現象,同樣也驗證了β/γ結晶的生成,并且在IL添加量為1%時PVDF的球晶分布的更加均勻,球晶的粒徑也明顯較小。通過SEM觀察,發(fā)... 

【文章來源】：合肥工業(yè)大學安徽省 211工程院校 教育部直屬院校

【文章頁數】：121 頁

【學位級別】：博士

【文章目錄】：
摘要
Abstract
Acknowledgement
Motivation
1. Introduction
    1.1 PVDF and its Polymorphism
    1.2 Methods of Preparation of PVDF β phase
        1.2.1 Uniaxial stretching
        1.2.2 Melt crystallization
        1.2.3 Solution casting
        1.2.4 Copolymerization
        1.2.5 Blends and Nanocomposites
    1.3 Ionic Liquids(ILs)
        1.3.1 Structure of Ionic Liquids
        1.3.2 Structural Organization of IL in Solid/Liquid State
    1.4 Multiwalled Carbon Nanotubes(MWCNT)
    1.5 Crystallization Kinetics
        1.5.1 Crystallization Kinetics' Theories
        1.5.2 Differential Scanning Calorimetry and Crystallization Kinetics
    1.6 ILs in Polymer Science
    1.7 IL as β/γ Phase Enhancer in PVDF
2. Modification of PVDF Crystalline Morphology through Amphiphilic Ionic Liquid
    2.1 Introduction
    2.2 Experimental
        2.2.1 Materials and Methods
            2.2.1.1 Purification of PVDF
            2.2.1.2 Preparation of PVDF/IL Blends
    2.3 Characterization
        2.3.1 FTIR-ATR,X-ray Diffraction(XRD) Spectroscopy
            2.3.1.1 FTIR-ATR
            2.3.1.2 XRD
        2.3.2 Optical Microscopy(OM)
        2.3.3 Polarized Optical Microscopy(POM)
        2.3.4 Differential Scanning Calorimetry(DSC)
    2.4 Results and Discussion
    2.5 Conclusion
3. Crystal Structure Transformation of PVDF through Amphiphilic Ionic Liquid Modified MWCNT
    3.1 Introduction
    3.2 Experimental
        3.2.1 Materials
        3.2.2 Preparation of PVDF/IL/MWCNT Nanocomposites
    3.3 Characterization
        3.3.1 FTIR-ATR/X-ray Diffraction(XRD)Spectroscopy
            3.3.1.1 FTIR-ATR
            3.3.1.2 XRD
        3.3.2 Optical Microscopy(OM)
        3.3.3 Polarized Optical Microscopy(POM)
        3.3.4 Differential Scanning Calorimetry(DSC)
            3.3.4.1 Nonisothermal Crystallization
            3.3.4.2 Isothermal Crystallization
        3.3.5 Scanning Electron Microscopy(SEM)
        3.3.6 Dynamic Mechanical Analysis(DMA)
    3.4 Results and Discussion
    3.5 Conclusion
4. Crystallization Kinetics of PVDF Filled with MWCNT Modified by Amphiphilic Ionic Liquid
    4.1 Introduction
    4.2 Experimental
        4.2.1 Materials
        4.2.2 Preparation of PVDF/IL/MWCNT Nanocomposites
    4.3 Characterization
        4.3.1 Scanning Electron Microscopy(SEM)
        4.3.2 FTIR-ATR/X-ray Diffraction (XRD) Spectroscopy
            4.3.2.1 FTIR-ATR
            4.3.2.2 XRD
        4.3.3 Differential Scanning Calorimetry(DSC)
        4.3.4 Crystallization Kinetics
    4.4 Results and Discussion
    4.5 Conclusion
5. Conclusion and Perspectives
6. References
7. Published Papers



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