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 20 of 249 for “"Fillers"”.
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Biodegradable Polymeric Ion Releasing Fillers
… time. Biodegradeable polymeric ion-releasing fillers (PIRFs) synthesized from alginate have the potential to be a useful sustainable tool that can provide sustained pH independent release of ions that promote remineralization in enamel. These PIRFs were rinsed to remove excess calcium ions and …
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Organic Fillers in Phenol-Formaldehyde Wood Adhesives
… cooperation with a focus on how the organic fillers impact the properties of the formulated adhesives and adhesive bond performance. The fillers studied in this work are derived from walnut shell (Juglans regia), alder bark (Alnus rubra), and corn cob (furfural production) residue. Alder bark …
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Inspection of Flexible Fillers in Post-Tensioned Bridges
… is currently pushing toward the use of flexible fillers (FF) in new post-tensioned (PT) bridges. Flexible fillers have several advantages compared to the currently used cementitious grouts (CG) and can offer longer-lasting structures by providing better corrosion protection and allowing for …
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Effect of nano- fillers on tensile properties of biopolymer films
… and broader applications. The addition of nanofillers has been proposed as a way to modify mechanical properties of biopolymers. This work is focused on biopolymers as edible materials, therefore biopolymers and fillers must meet this requirement. In this study, microcrystalline cellulose …
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Effect of the Incorporation of Antiviral Fillers into 3D-Printing Resin
… was to determine the effect of 5 antiviral fillers (5 and 10 w/w%) on the photopolymerization kinetics, depth of cure and flexural strength on a surgical guide3Dprintingresinusedindentistry. Fivedifferentantiviralfillers[BioSafeGlass(quaternary ammonium modified glass) and 4 different …
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Degradation of polylactic acid in the presence of microsize and nanosize fillers
… and thermal kinetics analysis organomodified nanofillers have a complex effect on the polymer thermal stability, whereas all unmodified fillers reduce polymer thermal stability. The thermal stability of calcined clay composites is higher than that of their non-calcined clay counterparts. It is …
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Biodegradable Polymeric Ion Releasing Fillers Effect on Pit and Fissure Sealant Properties
… in Europe require polymeric micronsized fillers to be biodegradable. The purpose of this research was to explore fabricated polymeric ion releasing fillers (PIRFs) that were made from alginate polymers and examined the effect of incorporating 3 different concentrations of (PIRFs) (2.5 …
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Exploration of plastic pallets using various fillers on graphite nanoplatelets/polypropylene composites
… and the compounding order of two different fillers. The impact strength of composite samples, containing 1wt% of GnP and mCaCO3 nanoparticles, increased up to 64% compared to neat PP. Among all tested samples, the highest tensile strength was found at 1wt% of mCaCO3 nanoparticles regardless …
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Dimensional Stability and Properties of Thermoplastics Reinforced with Particulate and Fiber Fillers
… reinforced with particulate and fiber fillers. The first part of this study was concerned with ascertaining the main causes of warpage observed for injection-molded thermoplastics reinforced with high aspect ratio fibers. Typically, warpage in injection-molded fiber reinforced …
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Ultrasonic NDT Methods for the Evaluation of Post-Tensioned Systems with Flexible Fillers
… of post-tensioned structures with flexible fillers is desperately needed due to their rapid implementation in the State of Florida, primarily in roadway structures. This study provides an overview of existing evaluation methods for traditional post-tensioned structures with cementitious …
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Improving heat transfer in spent nuclear fuel disposal packages using metallic void fillers
Disposal packages containing high heat generating spent nuclear fuels (SNF) require improved heat transfer to keep the peak cladding temperature from going above the tolerance limit. Filling the accessible void spaces between the container and the SNF with a high heat conducting metal is a …
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Development of Stochastic and Anisotropic Multiscale Ceramics Using High Aspect Ratio Sacrificial Fillers
This thesis aims to establish a straightforward and cost-effective way to form porous ceramics. There is a specific emphasis on creating anisotropic structures via a directional ice-templating technique and hard-templating using the sacrificial filler method. Cellulose nanocrystals (CNCs) aerogels …
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Fundamental Importance of Fillers, Cure Condition, and Crosslink Density on Model Epoxy Properties
… of silane treated amorphous fumed silica fillers on properties of the cured epoxy was examined in the first part of the study. Silica particles were treated with 3- aminopropyldiethoxymethylsilane (APDS) and 3-aminopropyltriethoxysilane (APTS) coupling agents. The filler and coupling …
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Motivational factors and post procedure impact of facial dermal fillers: a qualitative descriptive study
… invasive cosmetic procedures, such as dermal fillers. As there are few studies in this field, with most focussing on cosmetic surgery, we conducted research into perceptions around use of dermal fillers, which could contribute to standards of care in administering minimally invasive aesthetic …
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The effects of fillers on the mechanical properties of polyester resin and a constrained optimization of filler content
A study was made to determine the effects of fillers on the mechanical properties of a flexible polyester resin. Also, a method was demonstrated for a constrained optimization of the volumetric cost of the filled polyester. The fillers investigated included clay, marble, nut shell flour, and glass …
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Proactive measures in combating bullying in schools: examining the effectiveness of the Bucket Fillers program in character building education
… examine the character education program, Bucket Fillers, and its effectiveness on reducing bullying in one public elementary school by examining questionnaires containing homeroom teachers' evaluations. Data of behavioral incident reports from prior to the program's initiation and after were also …
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Addition of new polymerbased and mineral-based fillers in mortar: influences of polyurethane and afwillite on the microstructure and final properties
Para reducir la cantidad de plásticos y polímeros que se depositan en vertederos se ha realizado la inclusión de compuestos tales como residuos de espuma de poliuretano como material reciclado y reutilizable en sustitución de cantidades variables de áridos en la producción de nuevos materiales de …
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Rheology And Organic Filler Interactions in Phenolic Resin Formulations
… residue. These organic waste products act as fillers that reduce the cost, increase the viscosity, and affect the rheology of the fillers. Wheat flour is added as an extender to reduce cost and affect the tack of the adhesive. These organic fillers are lignocellulosic materials that are made …
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Poly(Ethylene Oxide)/Graphene Oxide Polymer Nanocomposite Electrolyte for Lithium Ion Batteries
… oxide (GO) nanosheets were used as nanosized fillers in polyethylene oxide (PEO) electrolyte. We demonstrated that about an order of magnitude improvement in lithium-ion conductivity, as high as 10-4 S/cm at room temperature, was achieved with GO fillers. We used thermal analysis, impedance …
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