Hierarchically Porous Bio-Carbon Based Composites for High Electromagnetic Shielding Performance

Description

This book highlights the preparation and characterization of efficient electromagnetic shielding composites containing bio-carbon derived from natural loofah with unique three-dimensional porous structures by means of entire structure design of composites according to shielding theory. The synergistic effect of multifunctional nanoparticles and bio-carbon on electromagnetic shielding mechanism, mechanical performance, and thermal stability of composites obtained has been holistically investigated. The discovery of this renewable, environmentally friendly, and inexpensive bio-carbon represents a new class of conductive materials with multi-interfaces and unravels further research and development of a wide variety of new electromagnetic shielding material systems with potential commercial applications ranging from electronic devices to energy management.​ Preface Contents 1 Introduction to Electromagnetic Shielding Composites 1.1 Adverse Effects of Electromagnetic Waves 1.2 Mechanism of Electromagnetic Shielding 1.3 Electromagnetic Shielding Composites 1.3.1 Conductive Fillers 1.3.2 Conductive Networks 1.4 Applications of Biomaterials in Electromagnetic Shielding Field 1.5 Summary References 2 Graphene/Carbonized Loofah Fiber/Polyetheretherketone (PEEK) Composites 2.1 Overall Design of Advanced Composite System 2.2 Materials and Experimental Methods 2.2.1 Materials 2.2.2 Preparation of Carbonized Loofah Fibers 2.2.3 Preparation of Graphene/Carbonized Loofah Fiber/PEEK Composites 2.3 Characterization Techniques 2.4 Results and Discussion 2.4.1 Morphological Analysis 2.4.2 Mechanical Properties 2.4.3 Raman and X-Ray Diffraction (XRD) Analyses 2.4.4 Electrical Conductivity 2.4.5 Electromagnetic Shielding Performance 2.4.6 Thermal Stability 2.5 Summary References 3 Carbon Nanotube (CNT)/Nickel-Plated Carbonized Loofah Fiber/PEEK Composites 3.1 Material Design Approach 3.2 Material Selection and Manufacturing Methods 3.2.1 Materials 3.2.2 Preparation of Nickel-Plated Carbonized Loofah Fibers 3.2.3 Preparation of MWCNT/Nickel-Plated Carbonized Loofah Fiber/PEEK Composites 3.3 Characterization Techniques 3.4 Results and Discussion 3.4.1 Mechanical Properties 3.4.2 Morphological Analysis 3.4.3 Raman and XRD Analyses 3.4.4 Fracture Morphology 3.4.5 Electrical Conductivity and Electromagnetic Shielding Performance 3.4.6 Thermal Stability 3.5 Summary References 4 Silicon Carbide Whiskers Coated Carbonized Loofah Sponge Composites 4.1 Overall Composite Design 4.2 Materials and Used Methods 4.2.1 Materials 4.2.2 Pre-Treatment of Loofah Sponge 4.2.3 Preparation of Carbonized Loofah Sponge 4.2.4 Preparation of Silicon Carbide Whiskers Coated Carbonized Loofah Sponge 4.3 Characterization Techniques 4.4 Results and Discussion 4.4.1 Thermogravimetric Analysis of Natural Loofah Sponge 4.4.2 Mechanical Properties 4.4.3 Raman and XRD Analyses 4.4.4 Electrical Conductivity 4.4.5 Electromagnetic Shielding Performance 4.4.6 Thermal Properties 4.5 Summary References 5 MXene Aerogel/CVD Carbon-Coated Carbonized Loofah Sponge Composites 5.1 Composite Design 5.2 Materials and Methods 5.2.1 Materials 5.2.2 Preparation of CVD Carbon-Coated Carbonized Loofah Sponge 5.2.3 Preparation of MXene Aerogel/CVD Carbon-Coated Carbonized Loofah Sponge Composites 5.3 Characterization Techniques 5.4 Results and Discussion 5.4.1 Morphological Analysis 5.4.2 Raman and XRD Analyses 5.4.3 Mechanical Properties 5.4.4 Electrical Conductivity 5.4.5 Electromagnetic Shielding Performance 5.4.6 Thermal Properties 5.5 Summary References 6 Potential Applications of Carbonized Loofah Fiber/Sponge 6.1 Introduction 6.2 Gradient EMI Composites for High Absorption/Low Reflection 6.3 Cellulose for Direct Ink Writing 6.4 Modified Carbonized Loofah/Metal Alloy Composites for High Strength and Toughness Protection 6.5 Catalysis for Water Splitting 6.6 Modified Carbonized Loofah for Microwave Absorption 6.7 Nature Loofah Structure for Artificial Biomimetic Material Templates 6.8 Summary References