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 326 for “"Wettability"”.
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Tunable wettability of microstructured polypyrrole films
… material for applications requiring switchable wettability. A fabrication procedure that produces robust microstructured polypyrrole (PPy) that quickly and reversibly switches between the superhydrophobic and superhydrophilic states is discussed. The polymer is doped with …
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Wettability assessment using resistivity and NMR measurements
The wettability of reservoir rocks influences multi-phase fluid flow and rock physics measurements. This impacts the relative permeability, recovery factor, choice of enhanced oil recovery method, and reservoir characterization. Wettability can be assessed using contact angle measurements and the …
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Wettability on nanoparticle modified surface: for thermal engineering
… strategy. Hydrophilicity, implying better wettability of liquid on solid surface, is preferred in some processes of air-conditioning and power-generation systems, such as dehumidification, evaporative cooled condensers, and pool boiling at high heat flux. Recent research in nanofluid …
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Aging Effect in the Wettability of Nickel Nanorod Arrays
The time-dependent wettability of nickel nanorod arrays was studied by measuring their water contact angles as a function of "aging" time in air. The nickel nanorod arrays were deposited on silicon substrates by DC magnetron sputtering using an oblique angle of 85° with respect to the substrate …
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Influence of Surface Wettability on Drop Dynamics and Condensation
… are commonly employed to specify the surface wettability: rest or static contact angle (_) and contact angle hysteresis (__). Partially non-wettable surfaces are characterized by static contact angles _ > 90° while partially wettable surfaces _ < 90°. Contact angle hysteresis, defined as the …
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Wettability of graphitic materials and their application in separation
Graphitic carbon-water interaction or wettability of graphitic materials has received significant interest due to extraordinary thermal, physical, and electrical properties of different forms of graphitic carbon and influence of wettability in condensation, adhesion, separation, tribology, and …
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Surface wettability studies of PDMS using flame plasma treatment
… to be a much faster way to modify PDMS surface wettability than the current technologies. The surface wettability of Polydimethylsiloxane (PDMS) treated with flame plasma was studied. The surface wettability was characterized by contact angle measurements using water and a surface tension liquid …
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Optimizing wettability of externally wetted microfabricated silicon electrospray thrusters
… research explores the parameters that affect wettability of externally wetted microfabricated silicon electrospray thruster arrays and how varied wetting surface treatments affect thruster performance. Silicon samples with various black silicon treatments were fabricated and optimal black …
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Data Analytics of Wettability Alteration with Surfactants in Carbonate Reservoirs
<p>"Wettability alteration with surfactants has been widely applied to improve oil recovery in carbonate reservoirs. An effective surfactant huff-puff application design requires comprehensive guidelines about where, how, and when this method could be applied. Besides, traditional methods to design …
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Wettability and hydrophilicity of rigid and soft contact lens surfaces
… between a contact lens surface and a liquid. The wettability and hydrophilicity of both soft and rigid contact lens surfaces were determined using two novel techniques and an established method. The two novel techniques were the un-separated adherent quid/laser method and the adherent liquid/ …
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Wettability of low Sn solders on integrated circuit package metallizations
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1983.
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A study on wettability properties of rutile-phase TiO2 nanostructure film
… environmentally friendly, thus the study of the wettability properties of rutile-phase TiO2 film is introduced for self-cleaning application. TiO2 is fabricated using the hydrothermal synthesis method at 150°C. The fluorine-doped tin oxide (FTO) is used as a substrate to grow the TiO2 …
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Flow and Distribution of Water in Fractional Wettability Unsaturated Porous Media
… industrial, and municipal activities. The wettability properties (e.g., water repellency) of soil in the unsaturated zone play an important role in determining fluid movement and ultimate distributions. A number of studies have shown that preferential flow and spatially variable moisture …
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Nanostructured multifunctional materials for control of light transport and surface wettability
… functions, ranging from optical properties to wettability, such as anti-reflection coatings in moth eyes and self-cleaning surfaces of lotus leaves. Combining optical and wetting functions in multifunctional materials is critical for practical engineering applications such as energy harvesting, …
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Bubble behavior in subcooled flow boiling on surfaces of variable wettability
… flow boiling of water on a surface of variable wettability. Images obtained from the videos were analyzed to find parameters influencing bubble size at departure. A model was developed relating the dimensions of the bubble at departure to its upstream and downstream contact angles based on a …
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Air Cooling of High-Heat-Flux Electronics Using Wettability-Engineered Vapor Chambers
The rapidly rising use of highly dense electronics in modern digital installations -ranging from data centers to power electronics- fuels the need for development of better, reliable, yet sustainable and low-energy-use cooling solutions. Air cooling, while highly reliable and conventionally used in …
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The wettability of biomaterials determines the protein adsorption and the cellular responses
… physicochemical properties of the materials as wettability greatly influence the amount and conformational changes of adsorbed proteins. In turn the type, amount and conformational state of the adsorbed protein layer determines whether platelets will adhere and become activated or not on the …
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Wettability of solid particles in relation to particle-stabilised foams and emulsions
… areas that require further investigation. The wettability of colloidal particles is one of the main factors that determine how they behave in a given system but determining the wettability is difficult due to the small size of the particles. The Film Calliper Method (FCM) has been proposed as a …
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Understanding and Controlling Wettability of Carbon Powders for PEM Fuel Cell Applications
The wettability of catalyst layers (CLs), especially of the cathode, is critical to enhancing the performance and lifetime of polymer electrolyte membrane fuel cells (PEMFCs). As the CLs are composed of Pt nanoparticles supported on carbon powders, bound together with Nafion®, the main focus of …
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