Global ETD Search
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 12 of 12 for “"Nano fibers"”.
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Growth mechanisms of carbon nano-fibers, -tubes, and graphene on metal oxide nano-particles and -wires
Carbon nanostructures (CNS) such as carbon nano-fibers (CNFs), -tubes (CNTs), and graphene are of interest for a diverse set of applications. Currently, these CNS are synthesized primarily by chemical vapor deposition (CVD) techniques, using metal catalysts. However, after CNS synthesis, those …
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Cellulose Nano Fibers Infused Polylactic Acid Using the Process of Twin Screw Melt Extrusion for 3d Printing Applications
In this thesis, cellulose nanofiber (CNF) reinforced polylactic acid (PLA) filaments were produced for 3D printing applications using melt extrusion. The use of CNF reinforcement has the potential to improve the mechanical properties of PLA, making it a more suitable material for various 3D …
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Effect of nano-fibers on the stress-strain behavior of semi-crystalline poly(ethylene terephthalate) at different strain rates
… and semicrystalline PET with various amounts of nano-fibers added. The stress-strain behavior for each material at several strain rates is presented. A typical stress-strain curve consists of a relatively steep rise in stress at small strains where the slope is the Young's Modulus. Then, the …
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Pressure Variation Assisted Fiber Extraction and Development of High Performance Natural Fiber Composites and Nanocomposites
… due to the large surface areas provided by the nano scale materials, various composite properties could be enhanced when such particles are incorporated into a polymer matrix. There is also a trend of utilizing natural resources or reusing and recycling materials that are already available for …
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STEP-enabled Force Measurement Platform of Single Migratory Cells
… allows for the deposition of aligned polymeric nano-fibers with control on fiber diameters and orientation in single and multiple layers (diameter: sub 100nm micron, length: mm-cm), deposition (parallelism 2.5 degrees) and spacing (microns)). A wide range of polymers such as PLGA, PLA, PS, and …
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Hybrid Nanostructured Textile Bioelectrode for Unobtrusive Health Monitoring
… To remedy this problem, a textile based nano-bio-sensor was developed and evaluated in this research. The sensor was made of novel array of vertically standing nanostructures that are conductive nano-fibers projecting from a conductive fabric. These sensor electrodes were tested for the …
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Preconditioning Methods in Cartilage Tissue Engineering: Influences of Silk Material Properties and Hypoxia on Chondrogenesis
… tissue constructs. The composite silk made from nano-fibers and hydrogel - a structure resembling the collagen network and proteoglycan in native cartilage - improved equilibrium and dynamic modulus of engineered tissue by 50% and 60%, respectively, in comparison to silk hydrogel without fibers. …
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Single Polymer Micro- and Nano- Composites
… phase, SPCs containing Vectran® micro- and nano- fibers as a reinforcement were prepared, and their thermo-mechanical properties and recyclability were investigated using a multidisciplinary approach. Single polymer micro composites (SPMCs) containing up to 30 wt% of reinforcing microfibers …
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Nano-Modification for High Performance Cement Composites with Cellulose NanoCrystals and Carbon Nanotubes
… goal of this study is to utilize two different nano-fibers, cellulose nanocrystals (CNCs) and carbon nanotubes (CNTs) to modify the nanoscale structures of cement composites and thereby improve the performance at the macro-level. This study also evaluates the mechanism behind the modification, …
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Composite Nanoparticle Materials for Electromagnetics
… The composite cores consist of one or more nanoparticle materials consolidated into a polymer or elastomer matrix material. Nanoparticles such as Carbon Nanosphere Chains, Carbon Nano Fibers and Superparamagnetic Iron Oxide nanoparticles were used to fabricate the cores. Superparamagnetic …
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Evaluation of Mechanical Properties of Provisional Fixed Partial Denture PMMA Material Containing Alumina Nanofibers
… was to study the effects of alumina nanofibers reinforcement on the mechanical properties of commercially available provisional fixed partial denture PMMA material. The hypothesis was that the addition of alumina nanofibers to commercially available PMMA resin will significantly …
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Νέα προσέγγιση στην παρακολούθηση της αναπτυσσόμενης βλάβης υπό μηχανική φόρτιση σε ινώδη σύνθετα υλικά με μήτρα ενισχυμένη με νανοσωληνίσκους άνθρακα
… αγώγιμα πολυμερή (πχ. Carbon Black, Carbon -Nano-Fibers κτλ.). Στην δεύτερη φάση η έρευνα επικεντρώθηκε στη παρασκευή και στον ηλεκτρομηχανικό χαρακτηρισμό των ινωδών συνθέτων υλικών, όπου η μήτρα είναι η προαναφερθείσα τροποποιημένη με ΝΣΑ. Πρώτο βήμα αποτέλεσε η μελέτη της επίδρασης της …