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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 16 of 16 for “"Microfiber"”.
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Shape Optimization of Microfiber Composite Energy Harvesters
… harvesting beam with a piezoelectric material, microfiber composite (MFC), in a unimorph configuration was setup in Matlab using the governing equations of motions of a coupled electromechanical system. The equations of motion were derived using Hamilton’s variational principles and constitutive …
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Measurement of Temperature, Refractive Index, or Axial Acceleration with Etched PCF Microfiber Structure
In the field of optical fiber sensors, one of the most versatile structures is the Fabry-Perot interferometer. This thesis will present a novel sensor based on an Intrisnic Fabry-Perot Inferferometer (IFPI) cavity to measure axial acceleration, refractive index, and temperature. The sensor …
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Catalysis and manufacturing of two-scale hierarchical nano- and microfiber advanced aerospace fiber-reinforced plastic composites
… of aligned carbon nanotubes (A-CNTs) on carbon microfibers (CFs) enables new composites with improved strength, toughness, electrical and thermal properties. While these improvements have been empirically demonstrated on alumina fiber FRPs, CNT growth degrades the CFs and sacrifices in-plane FRP …
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Manufacture of aerospace-grade thermoset and thermoplastic composites via nanoengineered thermal processing
… fiber reinforced plastics (CFRP) using carbon microfiber reinforcement with thermoset and thermoplastic polymer matrices. With the increasing use of such composites, the need for energy-efficient, cost-effective methods to produce composite structures is desired. Traditional curing processes …
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Multifunctional systems with polymer actuators : mechanochromism and peristalic pumping
… soldier survivability systems, pumping microfibers and mechanochromic pixels. Progress was made along the two major paths of investigation towards the realization of a pumping microfiber. Polypyrrole was chemically deposited onto copolyetherester. Tubular polypyrrole actuators at the …
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Manufacturing and fracture of hierarchical composite materials enhanced with aligned carbon nanotubes
… aligned CNTs on a three-dimensional woven microfiber substrate and infiltrating the fuzzy fiber plies with polymer to realize the Fuzzy Fiber Reinforced Plastics (FFRP) architecture. These FFRP laminates show < 1% void fraction for a viscous marine epoxy system via hand lay-up and …
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Absorbent Household Materials For The Collection Of Ignitable Liquid Residues From Surfaces Of Varying Porosity
… available absorbent household materials such as microfiber and paper-based products have shown to be effective in the collection of ILs from non-porous surfaces such as ceramic tile. Fibers from these materials are attached to a solid backing which ensures the removal of the fibers from the pores …
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Supramolecular Nanofibers - Preparation, Structure-Property Relations, and Applications
… in nonwoven scaffolds. This results in a stable microfiber-nanofiber composite. The main advantage of this process is the effective incorporation of nanofibers in the volume of the nonwoven fabrics. For supramolecular systems, it was claimed that they are too fragile to be competitive with …
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DRUG ELUTING TISSUE ENGINEERED VASCULAR GRAFTS
… promotes endothelial monolayer formation, and a microfiber poly(lactic-co-glycolic acid) (PLGA) inner layer loaded with an antiproliferative agent. PCL typically takes 1-2 years to degenerate, where as PLGA takes approximately weeks to months depending on the ratio of Poly Lactic Acid (PLA) to …
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Biomimetic and vascularized 3-d liver cancer model
… gel; 2) heparin crosslinked, wet-spun chitosan microfiber/electrospun chitosan mat tube are coated with endothelial cells; and 3) spheroids and endothelial coated electrospun chitosan mat tube are embedded together on Matrigel. Using the hanging drop method, spheroids are formed and encapsulated …
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Modeling longleaf pine (Pinus palustris Mill) wood properties using near infrared spectroscopy
… and stiffness. Klason lignin, extractives, and microfiber angle (MFA) were also measured throughout the tree. I found extractives, lignin, and MFA to decrease from the pith outward regardless of height. A theoretical model was built attempting to explain how lignin content and MFA co-vary. …
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Design, Fabrication, and Characterization of Three Dimensional Complete Scaffolds for Bone Tissue Engineering
… gelatin/PLLA nanofibers wrapped around microfiber core with diameters that ranged from 200-600µm. Individual osteon-like scaffolds were heat sintered to fabricate three dimensional scaffolds contained a system of channels running parallel to the length of the scaffolds, as found …
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An Evaluation of Tape for the Collection of Ignitable Liquid Residues from Non-Porous and Porous Surfaces
… or everyday absorbers such as paper towels and microfiber cloths. Each of these have had limitations stemming from the ability to penetrate and/or be removed from a porous material as well as in compatibility with the individual components of an IL. In this work, tapes of a variety of …
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Interfacial and Physical Confinement Effects on the Structure and Properties of Aligned Carbon Nanotube Architectures
… that the array fails progressively, similar to microfiber bundles in tension, and in particular evolves non-monotonically with Tₚ with three regimes identified: first increasing from an as-grown strength of ∼0.04 MPa to ∼0.13 MPa up to Tₚ = 735°C (in Regime I), then up to ∼0.35 MPa strength up …
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Complex bioactive fiber systems by means of electrospinning
… fiber meshes together with electrospun nano- and microfiber meshes were further used for the inorganic/organic hybrid fabrication of PCL with calcium carbonate or calcium phosphate, two biorelevant minerals. Such composite structures are attractive for the potential improvement of properties such …
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Fundamental investigations on the barrier effect of polyester micro fiber fabrics towards particle-loaded liquids induced by surface hydrophobization
As the title implies, the chief goal of the present work is the improvement of the barrier effects of textile fabrics in the medical sector, in particular, in the operating room, which would be an effective safeguard against the causative pathogens allowing the health workers to work in and around …