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Carbon Nanotube And Cellulose Nanocrystal Hybrid Films, Mingzhe Jiang, Robert Seney, Paul Charles Bayliss, Christopher L. Kitchens
Carbon Nanotube And Cellulose Nanocrystal Hybrid Films, Mingzhe Jiang, Robert Seney, Paul Charles Bayliss, Christopher L. Kitchens
Publications
The use of cellulose nanocrystals (CNC) in high performance coatings is attractive for micro-scale structures or device fabrication due to the anisotropic geometry, however CNC are insulating materials. Carbon nanotubes (CNT) are also rod-shaped nanomaterials that display high mechanical strength and electrical conductivity. The hydrophobic regions of surface-modified CNC can interact with hydrophobic CNT and aid in association between the two anisotropic nanomaterials. The long-range electrostatic repulsion of CNC plays a role in forming a stable CNT and CNC mixture dispersion in water, which is integral to forming a uniform hybrid film. At concentrations favorable for film formation, the multiwalled …
Graphene Foam And Helically Coiled Carbon Nanotubes As Electrodes In Energy Storage Devices, Anthony Childress
Graphene Foam And Helically Coiled Carbon Nanotubes As Electrodes In Energy Storage Devices, Anthony Childress
All Dissertations
Since their inception, carbon nanomaterials have been exploited for use in energy storage. The discovery of carbon nanotubes and the later isolation of graphene opened new avenues in electrode research for batteries and electric double layer capacitors (EDLCs). Their combination of flexibility, mechanical robustness, and electronic conductivity make them ideal for use as active materials and additives. My research has focused on the synthesis and implementation of helical carbon nanotubes (HCNTs) for supercapacitors and few-layer graphene in the form of graphene foam (GF) for aluminum-ion batteries. The presence of defects and dopants was controlled in each system to determine how …
Design And Synthesis Of Polymer, Carbon And Composite Electrodes For High Energy And High Power Supercapacitors, Margarita Arcila-Velez
Design And Synthesis Of Polymer, Carbon And Composite Electrodes For High Energy And High Power Supercapacitors, Margarita Arcila-Velez
All Dissertations
Supercapacitors (SCs) are promising energy storage devices because they deliver energy faster than Li-ion batteries and store larger amounts of charge compared to dielectric capacitors. SCs are classified in electrical double layer capacitors (EDLCs) and pseudocapacitors, based on their charge storage mechanism. EDLCs store charge electrostatically, i.e. by physical charge separation. This mechanism limits the storable amount of energy to the available surface area of the electrode, typically made of carbon materials, but grants good cycling stability of the SC device. Pseudocapacitor electrodes, commonly made of conducting polymers or metal oxides, store charge faradaically, i.e. through redox reactions throughout the …
Highly Conductive Carbon Nanotube Fibers For Biomedical Applications, Vijoya Sa
Highly Conductive Carbon Nanotube Fibers For Biomedical Applications, Vijoya Sa
All Dissertations
We developed a wet spinning process for the formation of polymeric fibers with high loading of single walled carbon nanotubes. The dissertation consists of five chapters. In the first chapter, the research goals were formulated and the art and technologies of fiber spinning from carbon nanotubes were critically analyzed. The next three chapters report the original results. Last chapter summarizes all the findings.
In the second chapter, we describe a surfactant based method of stabilization of carbon nanotube dispersions. The conditions of stability of nanotube dispersions in aqueous solutions of sodium dodecyl sulfate were analyzed. Using surface tension isotherms, the …
Molecular Dynamics Study Of Particle Impact Induced Bond Breaking Of Single-Walled Carbon Nanotubes And Quality Factors Of Nanocomposite Structures, Puroorava Annapaneni
Molecular Dynamics Study Of Particle Impact Induced Bond Breaking Of Single-Walled Carbon Nanotubes And Quality Factors Of Nanocomposite Structures, Puroorava Annapaneni
All Theses
Part A
Injection of particles to the side wall of single-walled carbon nanotubes (SWCNT) has been employed for doping and storage of particles on SWCNTs. In addition, particle bombardment can be used to cut and modify graphene structures. While the collision of hydrogen atoms with SWCNTs has been extensively studied, collision dynamic behavior of heavy particles with SWCNTs has not been well understood. To facilitate a better understanding of the particle-SWCNT collision process, in this work, we study the impact of five noble gas atoms (He, Ne, Ar, Kr, Xe) with SWCNTs and investigate particle impact induced CNT bond breaking …