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 1770 for “"Hydrophobic"”.
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Hydrophobic Forces in Flotation
… measurements to better understand the role of hydrophobic forces in flotation. The force measurements were conducted between a flat mineral substrate and a hydrophobic glass sphere in aqueous solutions. It is assumed that the hydrophobic glass sphere may simulate the behavior of air bubbles …
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Hydrophobic Forces in Wetting Films
… the presence of a non-DLVO attractive force (or hydrophobic force) in the wetting films. The results obtained in the present work shows that long-range hydrophobic forces is responsible for the faster drainage of wetting film. It is shown that the changes in hydrophobic forces upon the thin water …
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Modeling Hydrophobic Effects at different lengthscales
Understanding hydrophobic effects at different length scales is relevant to many complex and poorly understood everyday phenomena in materials science and biology. In this thesis, a variety of theory/computational methods in statistical physics and statistical mechanics are used to address three …
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Nanostructured materials for hydrophobic drug delivery
… chemical processes governing the interactions of hydrophobic molecules with both inorganic (Psi) and organic (NC) nanostructured carriers. Despite the large number of advantages, Psi does not perform well as carrier for BC, since it stimulates the molecule degradation even if its surface is …
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Development of hydrophobic thermoplastic starch composites
This work deals with provision and characterization of the biopolymer-based composites achieved by incorporation of cellulose fibers as the reinforcement within the glycerol plasticized matrix formed by thermoplastic cornstarch biopolymer. The function of starch-based polymers is limited due to …
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Advancement of the Hydrophobic-Hydrophilic Separation Process
… at Virginia Tech have developed a process called hydrophobic-hydrophilic separation (HHS), which is based originally on a concept known as dewatering by displacement (DbD). The process uses non-polar solvents (usually short-chain alkanes) to selectively displace water from particle surfaces and to …
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Self-Assemblies Driven by the Hydrophobic Effect
… One key aspect of the properties of water is the hydrophobic effect, and whilst there is an appreciation of this phenomenon at the macro-scale (raindrops falling off leaves) and the micro-scale (the structure of cellular systems), a complete understanding at the molecular level still eludes …
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Wood cell wall modification with hydrophobic molecules
… that for some species results in an insertion of hydrophobic chemical substances into the cell walls of already dead wood cells, In the first part of this thesis a chemistry to modify wood cell walls was used, which was inspired by the natural process of heartwood formation. Commercially available …
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Hydrophobic, fluorinated silica xerogel for low-k applications.
A new hydrophobic hybrid silica film was synthesized by introducing one silicon precursor (as modifiers) into another precursor (network former). Hybrid films have improved properties. Hydrolysis and condensation of dimethyldiethoxysilane (DMDES) (solvent (EtOH) to DMDES molar ratio R = 4, water to …
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Development of Super Hydrophobic Surfaces using Silica Nanoparticles
… surfaces at nano-scale to support super hydrophobicity. Some of these techniques are expensive, some are very complex, most can be used for selective materials and substrate and some form surfaces with very poor wear resistance. This document represents a systematic study on fabrication …
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DEGRADATION OF CARBON TETRACHLORIDE USING HYDROPHOBIC GREEN RUST
<p>Hydrophobic green rusts (GR) were produced using aerial oxidation of solutions containing bis (2-ethylhexyl) sulfosuccinate (BIS) and sodium N-lauroylsarcosinate (SNLS), iron (II) sulfate and sodium hydroxide. The synthesis was conduced at constant pH 8.0±0.1 for the duration of 1-3 hrs. …
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Characterization and development of composite structured hydrophobic surfaces
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2025-08-01
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Hydrophobic nanostructured glass surfaces using metal dewetting process
This project aims to create a hydrophobic surface through a top down fabrication process of a nanostructure surface on a glass surface. The nanostructure is created through reactive ion etching utilizing silver as a mask. The silver mask is the result of a solid state thermal dewetting process …
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Optimization of hydrophobic meshes for oil spill recovery
… development of functionalized steel meshes with hydrophobic and oleophilic surfaces. These meshes can perform oil/water separation in situ, continuously, via capillary action. The goal of this study is to determine the potential of hydrophobic meshes as oil spill recovery devices. A fabrication …
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The role of hydrophobic core in protein folding
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Biology, 1991.
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Droplet deposition on hydrophobic surfaces for agricultural sprays
… wasted worldwide, due to the poor retention on hydrophobic plants. As the harmful effects of pesticides in particular are more and more pointed out, there is an increasing pressure to reduce their use and make their spraying more efficient. Current solutions, mainly based on surfactants, all …
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An experimental study of nanobubbles on hydrophobic surfaces
… of nanobubbles- found to exist primarily on hydrophobic surfaces- that can play all important role in changing the hydrodynamic boundary condition at the fluid-solid interface giving rise to considerable reduction in friction of the fluid flow past the solid boundaries. In this study, we seek …
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Electrowetting study of jumping droplets on hydrophobic surfaces
Recent studies have shown that jumping-droplet-enhanced condensation has higher heat transfer than state-of-the-art dropwise condensing surfaces by -30-40%. Jumping-droplet condensation occurs due to the conversion of surface energy to kinetic energy during the coalescence of microscale droplets, …
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Cleaning and Dewatering Fine Coal using Hydrophobic Displacement
A new processing technique, known as hydrophobic displacement, was explored as a means of simultaneously removing both mineral matter and surface moisture from coal in a single process. Previous thermodynamic analysis suggests that coal moisture will be spontaneously displaced by any oil with a …
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