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 13 of 13 for “"Hydrophobic Coatings"”.
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Hydrophobic coatings for film boiling based drag reduction on a torpedo model
Previous research has shown that porous, hydrophobic surfaces exhibit a dramatic reduction in critical heat flux (CHF), the amount of heat over a surface area required to initiate film boiling. Film boiling is characterized by the presence of a vapor layer which remains as long as the surface …
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Dropwise condensation of water and low surface tension fluids on structured surfaces
… technical challenges of manufacturing dropwise coatings. During water condensation, dropwise mode can be readily promoted with thin hydrophobic coatings. Superhydrophobic surfaces made out of hydrophobic coatings on micro-or-nano-engineered surfaces have shown further heat transfer enhancement …
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Design and fabrication of an internal condensation loop for effectiveness and robustness testing of nanostructured superhydrophobic steam condenser
… forming a nanostructure and adding certain hydrophobic coatings on the heat exchanging surface of the condenser can render them superhydrophobic. This causes condensation to instead occur via the jumping droplet mechanism, which promises drastically improved heat exchanging performance. This …
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Enhanced condensation heat transfer for water and low surface tension fluids
… demonstrated that the mechanism for REO hydrophobicity results from adsorption of contaminants from the atmosphere. We also used graphene, which is hydrophobic in nature, as a coating to achieve robust dropwise water condensation. With a graphene coating, we demonstrated a 4x improvement …
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Development and Characterization of Fatty Acid-Coated Microgels Within Microfluidic Systems
… objects with an in situ process. The resulting hydrophobic coatings served as selectively permeable barriers that enabled pH-sensitive mugels to remain contracted while bathed by buffered solutions that caused expansion in unmodified samples. Modified mugels were capable of swelling once the …
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Capillary-Driven Condensation for Heat Transfer Enhancement in Steam Power Plants
… However, the requirement for ultra-thin coatings has hampered the wide adoption of this form of condensation as thin hydrophobic coatings degrade over time in various industrial applications. In this thesis, we model, fabricate, optimize, experimentally demonstrate a proof-of-concept for …
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Fundamental studies of hydrophobic thin film durability and degradation mechanisms during dropwise condensation of steam
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2022-11-14 without embargo terms
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Bio-inspired surface engineering for hydrophobicity
… structures on plant leaves with respect to their hydrophobicity in the context of the often arid Australian climate. The relationships between leaf surface structures and their hydrophobicity could inform the making of artificial surfaces with specially designed hydrophobicity. Moderate …
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Fabrication and robustness testing of superhydrophobic nanostructured surfaces for enhanced jumping condensation
… require advanced heat transfer materials. Superhydrophobic micro- and nano-structured surfaces which promote a jumping droplet mode of condensation have been shown to enhance heat transfer over conventional film wise condensation surfaces, but limited robustness testing has been reported …
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Biodiesel Production and Purification with a Hydrophobic Sintered Glass Filter
… onto sintered glass filters to render them hydrophobic. These hydrophobic filters were subsequently employed for the purification of biodiesel. Various properties of the OTS-coated sintered glass filters were evaluated, such as the water contact angle, water sliding angle, solvent flux, and …
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Characterization of zein extracted from beer solids, a coproduct of dry-grind ethanol
… has the ability to form glossy, flexible and hydrophobic coatings, these properties have led zein to be proposed for a number of applications: in controlled release, as a coating material, in biodegradable films, as a wall material for microencapsulation, and more recently as a biomedical …
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Mass transfer diffusion coefficient as a proxy for hydrophobic coating durability
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2026-05-01
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Anti-fouling interfaces for energy applications
… on lowering surface energy via the use of hydrophobic coatings, or creating atomically smooth interfaces to eliminate nucleation sites, or both, via the infusion of low surface energy lubricants into rough superhydrophobic substrates. Although lubricant-based surfaces are promising …