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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 15 of 15 for “"nanoparticle dispersion"”.
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Strengthening porous metal skeletons by metal deposition from a nanoparticle dispersion
… of nanometer-scale iron particles. The nanoparticle deposits from the suspension concentrate in regions of high stress when the solvent is removed by drying. The particles are sintered to create a dense structure that reinforces the porous skeleton-reducing deformation and creep. …
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Synthesis and Characterization of Polylactide-siloxane Block Copolymers as Magnetite Nanoparticle Dispersion Stabilizers
… designed and synthesized for study as magnetite nanoparticle dispersion stabilizers. Magnetic nanoparticles are of interest in a variety of biomedical applications, including magnetic field-directed drug delivery and magnetic cell separations. Small magnetite nanoparticles are desirable due to …
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From Nanoplates to Bottlebrushes: Engineering Thermodynamics in Polymer Nanocomposites
… Of utmost importance for nanocomposites is nanoparticle dispersion, which is affected by the nanoparticle itself as well as the overall polymer melt, providing two design routes. This dissertation explores PNCs through two distinctive systems: (1) nanoplates grafted with polymers in a linear …
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ENHANCEMENT OF PHASE CHANGE MATERIAL (PCM) THERMAL ENERGY STORAGE IN TRIPLEX-TUBE SYSTEMS
… was investigated. The techniques were; (i) dispersion of solid nanoparticles, (ii) incorporation of metal foam with nanoparticle dispersion, and (iii) insertion of longitudinal fins with nanoparticle dispersion. Validated simulation models were developed to examine the effects of …
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Synthesis and Characterization of Surface-Functionalized Magnetic Polylactide Nanospheres
… and synthesized to be studied as magnetite nanoparticle dispersion stabilizers. Magnetic nanoparticles are of interest for a variety of biomedical applications including magnetic field-directed drug delivery and magnetic cell separations. Small magnetite nanoparticles are desirable due to …
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Separation of Colloidal Particles in a Packed Column using Depletion Forces
… used to separate an equinumber density binary dispersion of 1.5 and 0.82 µm polystyrene sulfate (PS) particles. Experiments consisted of injecting a pulse of a binary dispersion of PS particles into the inlet of a packed bed of 0.5 mm silica collector beads. Prior to injection, a carrier fluid …
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Synthèse de nanoparticules de carbure de fer dans un réacteur à plasma inductif
… nanopowder in a liquid in order to minimize nanoparticle dispersion into the air, and protect pyrophoric nanoparticles from air exposure.
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Coarse-grained simulations to predict structure and properties of polymer nanocomposites
… the macroscopic level. Considering the polymer-nanoparticle interface significantly influences PNC properties, it is apparent that some atomistic level of detail is required to accurately predict the behavior of PNCs. Though an all-atom simulation of a PNC would be able to accomplish the latter, …
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Nanoparticles as strengthening agents in polymer systems
Carboxylate-substituted alumina nanoparticles are produced solvent free using mechanical shear. The general nature of this method has been demonstrated for L-lysine-, stearate, and p-hydroxybenzoate-derived materials. The reaction rate and particle size is controlled by a combination of temperature …
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Model electrode structures for studies of electrocatalyst degradation
… effective catalyst in these systems consists of nanoparticles of Pt or Pt-based alloys on carbon supports. Understanding the role of the nanoparticle size and structure on the catalytic activity and degradation is needed to optimize the fuel cell performance and reduce the noble metal loading. …
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Design and Optimization of Angiogenic, Antibacterial Si-Zn-Hydroxyapatite for Use as Filler Particles in Polycaprolactone Nanocomposites
… action of Zn-doped HAp was challenged. Nanoparticles of both doped and undoped HAp exhibited bacteriostatic activity against Staphylococcus aureus, yet Zn-doped variants were consistently less effective than their Si-doped or undoped counterparts. Ion release studies confirmed that Zn2+ …
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Particle microstructure and polymer dynamics in concentrated polymer solutions
The states of nanoparticle dispersions in concentrated polymer solutions are studied with extensive small angle scattering and NMR experiments. Silica nanoparticles are suspended in polymer-solvent mixtures. The effects of polymer induced interactions on the particle microstructure are examined …
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Glassy viscoelasticity of dense suspensions of soft colloids and structure & miscibility of soft filler polymer nanocomposites
… multi-scale model constructed for soft nanoparticle fillers. This is the first theoretical study of the role of nanoparticle morphology associated with surface corrugation and fluctuation at one and two particle limit in polymer melts with/without interfacial cohesion. Our results …
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Polymer-Particle Nanocomposites: Size and Dispersion Effects
… property improvements upon the addition of nanoparticles to polymeric materials. Nanoparticles, as enhancers of mechanical properties, are ubiquitous in synthetic and natural materials (e.g. automobile tires, packaging, bone), however, to date, there is no thorough understanding of the …
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Lipid Nanoparticles as Tools for the Administration of Active Natural Products Aimed to the Treatment of Nervous System Disorders
… solvent evaporation method obtaining spherical nanoparticles having a particle size suitable for parenteral administration (<200 nm). Nanoparticles showed a good stability for six months at room temperature, as confirmed by Turbiscan Technology. Furthermore, the obtained data showed that the …