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Study on the Improvement of Fiber-Matrix Interphase Strength of Ramie Fibers Reinforced Poly (Lactic Acid) Bio Composites via Fiber Surface Modification and Composite Thermal Annealing

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Study on the Improvement of Fiber-Matrix Interphase Strength of Ramie Fibers Reinforced Poly (Lactic Acid) Bio Composites via Fiber Surface Modification and Composite Thermal Annealing
论文目录
 
ACKNOWLEDGEMENTS第1-6页
摘要第6-8页
ABSTRACT第8-21页
SYMBOLS AND ABBREVIATIONS第21-23页
CHAPTER 1 INTRODUCTION第23-30页
  1.1 Introduction第23页
  1.2 Background of composites and fiber-matrix interphase strength第23-25页
  1.3 Biocomposites and their corresponding mechanical property第25-26页
  1.4 An eco-friendly approach to composite manufacturing第26页
  1.5 Research Objectives第26-28页
  1.6 Innovation points第28页
  1.7 Limitations第28-29页
  1.8 Outline of the thesis第29-30页
CHAPTER 2 LITERATURE REVIEW第30-55页
  2.1 Introduction第30页
  2.2 Development of green composite field第30-31页
  2.3 Application areas of bio-degradable composite第31-32页
  2.4 Factors affecting properties of green composites第32-33页
  2.5 Degradation properties of (green) composite and recycling options第33-34页
  2.6 Biopolymers第34-36页
    2.6.1 Polylactic acid (PLA)第35-36页
  2.7 Natural plant fibers第36-41页
    2.7.1 Cellulosic fibers第36-37页
    2.7.2 Classification and chemical composition of natural cellulose fibers第37-38页
    2.7.3 Physical and chemical properties of cellulosic fibers第38-39页
    2.7.4 Ramie fiber第39-41页
  2.8 Composite made of PLA and ramie fibers第41-42页
  2.9 Improvement of interphase adhesion strength at ramie/PLA biocomposite第42-46页
    2.9.1 Fiber modification for performance enhancement第42-43页
    2.9.2 Alkali treatment第43-44页
    2.9.3 Silane coupling agent第44-45页
    2.9.4 Heat treatment第45页
    2.9.5 Enzymes pectinase treatment第45-46页
  2.10 Thermal resistance modifiers for the application of biocomposites第46-50页
    2.10.1 The introduction of DAP as ramie fibers surface modifier第46-47页
    2.10.2 Wettability and strength of the interphase第47-49页
    2.10.3 Surface energy and calculations第49-50页
  2.11 Effect of post composite thermal annealing第50-52页
    2.11.1 Improving thermal stability第50-52页
  2.12 Processing techniques第52-53页
  2.13 Summary第53-55页
CHAPTER 3 EFFECT OF RAMIE FIBER SURFACE MODIFICATION ON THE INTERPHASE STRENGTH OF PLA BIO COMPOSITES第55-95页
  3.1 Introduction第55页
  3.2 Materials and Methods第55-60页
    3.2.1 Materials第55-56页
    3.2.2 Methods第56-59页
      3.2.2.1 Surface modification of ramie fibers第56-57页
      3.2.2.2 Alkali modification第57页
      3.2.2.3 Silane coupling agent modification第57-58页
      3.2.2.4 Pectinase and Heat modification第58-59页
    3.2.3 Fabrication of ramie/PLA composite第59-60页
  3.3 Characterization methods第60-65页
    3.3.1 Contact angle (CA) measurement and wettability tests第60-62页
    3.3.2 Mechanical strength tests第62-64页
      3.3.2.1 Tensile and Flexural tests第62-64页
      3.3.2.2 Impact notch strength tests第64页
    3.3.3 Morphology analysis第64页
    3.3.4 Thermal Analysis第64-65页
    3.3.5 Surface chemical analysis第65页
  3.4 Result and Discussion第65-71页
    3.4.1 Wettability and Surface Energy第65-71页
  3.5 Fiber matrix interphase adhesion strength第71-72页
  3.6 FTIR spectroscopy Results第72-77页
  3.7 Mechanical properties第77-85页
    3.7.1 Tensile Strength and Young’s Modulus第77-81页
    3.7.2 Flexural Strength and Flexural Modulus第81-84页
    3.7.3 Impact Strength第84-85页
  3.8 Thermal Analysis results第85-92页
    3.8.1 Thermogravimetric Analysis (TGA) results第85-89页
    3.8.2 Differential scanning calorimetric analysis (DSC) results第89-92页
  3.9 Surface morphological analysis第92-93页
  3.10 Summary第93-95页
CHAPTER 4 COMPOSITE THERMAL ANNEALING AND IMPROVEMENT OF BIO COMPOSITE PROPERTY第95-116页
  4.1 Introduction第95页
  4.2 Materials and methods第95-100页
    4.2.1 Materials第95页
    4.2.2 Methods第95-98页
      4.2.2.1 Surface Treatments第95-96页
      4.2.2.2 Fabrication of Ramie/PLA Composites第96-97页
      4.2.2.3 Thermal Annealing (Heat Treatment)第97-98页
    4.2.3 Tests and Characterization第98-100页
      4.2.3.1 Mechanical Testing第98-99页
      4.2.3.2 DMA Tests第99-100页
      4.2.3.3 FTIR Tests第100页
      4.2.3.4 Morphology Analysis第100页
      4.2.3.5 XDR Tests第100页
      4.2.3.6 DSC Tests第100页
      4.2.3.7 TGA Tests第100页
  4.3 Result and discussion第100-115页
    4.3.1 Improvement of crystallinity in ramie fibers/PLA biocomposites第100-105页
    4.3.2 FTIR Analysis Results第105-106页
    4.3.3 Thermal Analysis Results第106-108页
    4.3.4 Mechanical properties第108-112页
      4.3.4.1 Tensile strength第108-110页
      4.3.4.2 Flexural strength第110-111页
      4.3.4.3 Impact strength第111-112页
    4.3.5 Dynamic mechanical analysis第112-114页
    4.3.6 Surface morphology第114-115页
  4.4 Summary第115-116页
CHAPTER 5 MOLDING PROCESS OPTIMIZATION AND DEGRADATION PROCESSES OF RAMIE FIBER/PLA BIOCOMPOSITE第116-136页
  5.1 Introduction第116页
  5.2 Optimum composite design and fabrication第116-117页
  5.3 Materials and Methods第117-119页
    5.3.1 Fiber treatment and composite preparation第118-119页
  5.4 Characterizations第119-121页
    5.4.1 Mechanical Tests第119-120页
    5.4.2 Dynamic Mechanical Analysis (DMA)第120页
    5.4.3 Surface Analysis第120页
    5.4.4 Morphology Analysis第120页
    5.4.5 Degradation test第120-121页
  5.5 Results and Discussion第121-135页
    5.5.1 Tensile strength and tensile modulus第121-122页
    5.5.2 Flexural bending strength第122-124页
    5.5.3 Impact Strength第124-125页
    5.5.4 Dynamic Mechanical Properties第125-126页
    5.5.5 Extent of changes due to the surface improvements第126-127页
    5.5.6 Effect of modification on the surface property第127-128页
    5.5.7 Thermal Decomposition第128-130页
    5.5.8 Degradation process of PLA/ramie fibers biocomposite第130-135页
      5.5.8.1 Mass loss during the degradation process第130-133页
      5.5.8.2 Microstructure analysis in the process of degradation第133-135页
  5.6 Summary第135-136页
CHAPTER 6 SUMMARY AND FUTURE WORK第136-140页
  6.1 Summary第136-139页
  6.2 Recommendation for the Future research第139-140页
REFERENCES第140-153页
LIST OF PUBLICATIONS第153页

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