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 15 of 15 for “"Water stability"”.
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Water stability of organic and electrolyte-gated field-effect transistors
… Electro-Chemical Transistor (OECT). However, water constitutes a key factor in charge trapping and device degradation in organic materials, due to its strong dipole moment, high dielectric constant, and its omnipresence in almost all processing, environmental, and operational conditions. In …
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IMPLEMENTATION OF METAL-ORGANIC FRAMEWORK ON MEMBRANE DEVELOPMENT FOR LIQUID SEPARATION : INVESTIGATION, CHARACTERIZATION AND APPLICATION
… As most of discovered MOFs suffer from poor water stabilities, it has severely limited these composites’ further applications and commercialization. In this thesis, a series of zirconium (IV)-carboxylate MOFs (Zr-MOFs), namely UiO-66 and its derivatives, have been employed in the fabrication …
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Extrusion processing of selected fish feed blends containing distillers dried grains with solubles (DDGS)
… kg/h) were injected into the conditioner and water (4.3-13.1 kg/h) into the extruder to modulate the cooking and resulting cohesiveness of the final extrudates.<br /> The effects of varying formulations and extruder settings on extruder processing parameters and on the resulting physical …
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Chemical and Mechanical Stability of Copper Carboxylate Metal-Organic Frameworks
… difficulties because of their low chemical stability to common substances like water or even air moisture, substances difficult to avoid in applications like those above mentioned. Another issue concerning MOF industrialization consists in the low packaging of the micrometric powder grains …
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Synthesis, Modification, and Application of Colloidal Aluminum Nanoparticles
… polydopamine, for dramatic increases in aqueous stability. We examine the oxidation process of both bare and functionalized particles and characterize a high surface area oxide material obtained after oxidation. We then explore the multifunctional nature of polydopamine for its use as a capture …
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Synthesis and engineering of metal-organic frameworks for liquid phase applications
… is insufficient data on their chemical stability as well as the lack of a standardised stability testing approach across literature. Thus, the aims of this work are two develop a comparable way of probing the water stability of MOFs as well as to test their applicability for …
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Synthesis and structural stability of metal-organic frameworks
… are reported to be unstable in air due to the water molecules in air which greatly limited their applications. By incorporating a number of water repelling functional groups such as trifluoromethoxy group and methyl groups in the frameworks, the water stability of MOFs are shown to be …
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Development of porous metal-organic frameworks for gas adsorption applications
… streams containing CO₂ are often saturated by water and its presence greatly reduces the CO₂ adsorption capacities and selectivities. So, in the third project, we investigated the structural stability of the developed MOFs by measuring water vapor adsorption isotherms on them at different humid …
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Metal-organic frameworks for water treatment
… application of metal-organic frameworks in waste water treatment and the synthesis of new metal-organic frameworks.<br/><br/>Chapter one gives a general overview of water-treatment processes, the methods and materials used in these processes, and also the structures and properties characteristics …
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The evaluation of an organophosphate thermosetting resin for use in a high temperature resistant composite and a study of chemistry of ionomer cements
… resin has been made and used in high temperature stability studies. Post-cured resorcinol phosphate resin-chrysotile asbestos (30: 70) moulded bars retained 59.5% of their flexural strength after ageing at 523K for 1000 hr in air. Similar phenol-formaldehyde composite bars aged under identical …
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Understanding the Role of Plant-based Proteins and Extrusion Parameters in Different Fish Feeds
… a viable fish feed. Elevating levels of extruder water and conditioner steam increased density and water stability (WS), but reduced expansion ratio (ER) of Nile tilapia extrudates. It was determined that up to 40% HP-DDG inclusion, in contrast to C-DDGS, had no effect on bulk density (BD) of the …
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Main Group Hydrogen-Bond Donors and Pyridyl Ligands for Supramolecular and Coordination Chemistry
… used to modulate and enhance anion binding. The water stability and superior anion binding properties of the selenophosph(V)azanes gives them applications as synthetic anion transporters through phospholipid bilayers. Next, we establish synthetic methodologies for the rational design of …
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Synthesis and Characterization of Sulfonated Polyimides as Proton Exchange Membranes for Fuel Cells
… properties, thermal transition behavior, boiling water stability, solvent solubility and water absorption and conductivity. Commercially available five-membered ring dianhydrides such as 6FDA, BPDA, and six-membered ring dianhydrides such as naphthalene tetracarboxylic dianhydride (NDA) have been …
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SURFACE WATER – GROUNDWATER INTERACTIONS IN A PROGLACIAL ALPINE CATCHMENT: Applications of Heat Tracing, Modeling, and Remote Sensing Methods
<p>As climate change occurs, the availability and stability of water resources will be a global concern. The availability of reliable water resources will be of particular concern to regions that currently depend on meltwater from snowpack or glaciers during dry periods. One place whose water …
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Analysis of Transient Seepage Through Levees
… respect to seepage, erosion, piping and slope instability. Transient seepage analyses provide an effective method of evaluating seepage through levees and its potentially destabilizing effects. Floods against levees usually last for days or weeks. In response to a flood, pore pressures within the …