射频等离子体沉积丙烯酸和八氟环丁烷共聚涂层的化学成分与润湿性研究

发布时间：2024-12-01 22:34

　　对聚合物表面进行精准的润湿性控制在生物工程中具有重要的意义,润湿行为可以通过改变表面化学能和表面微观形貌来进行调控,等离子体表面改性技术在聚合物表面化学成分和形貌的调控上展现出明显优势。本论文主要研究通过等离子体聚合方法获得丙烯酸-八氟环丁烷共聚物涂层并研究其表面化学成分、润湿性、涂层生长动力学及涂层的稳定性。本论文研究了具有可控的润湿性以及pH响应性的智能共聚物涂层(C4F8-co-AA)。通过射频容性耦合等离子体(CCP)技术在原始和具有纳米织构的聚乙烯(PE)表面获得具有不同亲水/疏水性的丙烯酸-八氟环丁烷等离子体共聚物涂层。在原始聚乙烯表面的等离子体共聚物涂层静态接触角(SWCA)是119°到11°,具有纳米织构聚乙烯表面的等离子体共聚物涂层由超疏水(SWCA=163°)到超亲水(SWCA=4°)状态。由于表面纳米织构和等离子体共聚物涂层(C4F8-co-AA)羧基官能团的共同作用可产生对pH响应的润湿性行为。增加等离子体共聚物涂层中的羧基官能团可以获得具有pH响应的亲水性表面,表面纳米织构对pH响应行为也起到重要影响作用。研究了脉冲等离子体的占空比和气体流速对等离子体共聚物涂层...

【文章页数】：121 页

【学位级别】：博士

【文章目录】：
Abstract
摘要
List of abbreviations
1 Introduction
    1.1 Plasma polymerization
        1.1.1 Radio frequency plasma polymerization
        1.1.2 Growth mechanisms of plasma polymerization
        1.1.3 Influence of plasma parameters
        1.1.4 RF pulsed plasma polymerization
        1.1.5 Plasma copolymerization
    1.2 Surface wettability
        1.2.1 Static and dynamic wettability
        1.2.2 Theoretical background
        1.2.3 Textured surface wettability
    1.3 Surface functionalization of plasma polymer coatings
        1.3.1 Surface processes during plasma functionalization
        1.3.2 Functionalized plasma polymer coatings
        1.3.3 Functionalized plasma copolymer coatings
    1.4 Surface wettability of functionalized polymer coatings
        1.4.1 Hydrophobic polymer coatings
        1.4.2 Hydrophilic polymer coatings
        1.4.3 Tunable and pH-responsive surface wettability
    1.5 Prominent applications of tunable wettability and pH-responsiveness
        1.5.1 Oil-water separation
        1.5.2 pH-responsive tumor targeted drug delivery
    1.6 Motivation
2 Experimental and characterization techniques
    2.1 Plasma reactor and polymer coatings
        2.1.1 Substrate selection and preparation
    2.2 Composition analysis
        2.2.1 Fourier transform infrared (FTIR) spectroscopy
        2.2.2 X-ray photoelectron spectroscopy (XPS)
    2.3 Topography characterization
        2.3.1 Field emission scanning electron microscopy (FESEM)
        2.3.2 Profilometer
    2.4 Surface wettability measurements
        2.4.1 Static water contact angle (SWCA) measurements
        2.4.2 Contact angle hysteresis (CA hysteresis) measurements
        2.4.3 pH-responsive surface wettability measurements
3 Monomer feed rate dependent surface wettability and pH-responsiveness of plasmacopolymer coatings
    3.1 Surface chemistry
    3.2 Surface wettability
    3.3 Deposition rate
    3.4 Discussion
    3.5 Summary
4 Duty cycle dependent surface wettability of plasma copolymer coatings
    4.1 Surface chemistry
    4.2 Surface wettability
    4.3 Discussion
    4.4 Summary
5 Polyethylene substrate dependent surface wettability of plasma copolymer coatings
    5.1 Kinetics of C₄F₈-co-AA polymer deposition
    5.2 Surface chemistry
    5.3 Surface wettability
    5.4 Discussion
    5.5 Summary
6 Conclusions and outlook
Abstract of Innovation Points
References
Published academic papers during PhD period
Acknowledgement
About the Author



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