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Showing 1 to 20 of 70 for “"Microemulsion"”.
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Interfacial properties of surfactant monolayers in microemulsion systems
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 1995.
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Dynamics from an equilibrium lattice model of a microemulsion
<p>A 3D lattice model of three-component microemulsion employed previously to describe the equilibrium phase behavior has been extended to investigate the nonequilibrium dynamics of such system. The model is based on "Dynamical Monte Carlo" simulations which apply a coarse-grained velocity field …
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Synthysis of polymer/nano-droplet composites from reverse microemulsion polymerization
<p>L<sub>1</sub> and L<sub>2</sub> domains of the water/AOT/MMA ternary system were investigated at 22±1°C. Free radical polymerizations were conducted in L<sub>2</sub> domain. Only opaque polymer rods were obtained. Acrylamide, a water soluble monomer, plays a role of co-surfactant which greatly …
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Ultralow interfacial tensions and microemulsion formation in oil-water-surfactant systems
… the plane monolayer are shown to be spherical microemulsion droplets, whose sizes increase as a minimum in Yc is approached.The results are discussed in terms of the effective molecular geometry of the surfactant and how this is affected by the variables of interest. Minimum Yc occurs for the …
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Microemulsion and macroemulsion behaviour of systems containing oil, water and nonionic surfactant
… made to correlate some equilibrium properties of microemulsions with the formation and stability of macroemulsions. Studies have been mainly limited to water-in-oil (W/O) systems stabilised by pure nonionic surfactants of the poly-oxyethylene alkyl ether (CnEm) type. Initially however, a brief …
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Determination of trace elements in crude oils by ICP-MS using detergent microemulsion.
… introduced to the plasma after the formation of microemulsions in which Triton X-100 was used as the emulsifier and tetralin was the co-solvent with the addition of nitric acid in order to enable calibration with aqueous standard. The validity of the method was proven by three different …
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Development of Multiple Microemulsion Eye Drops for Sustained Release of New Glaucoma Drug
… pregabalin-loaded multiple water-in-oil-in-water microemulsion eye drops. Several in vitro and in vivo evaluations were used to characterize the prepared ophthalmic formulations. Also stability study at 5°C, 25°C, 30°C and 40°C was conducted for four months. All the formulations components were …
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Reverse Microemulsion System In Compressed Co2: Phase Behavior and Applications For Cleaning Biomaterials
… The strategy is to create a water-in-CO2 microemulsion phase to enhance the water content in CO2, and make it available for dissolving polar contaminants. This approach could out-perform traditional water-based cleaning processes, particularly for complex structures, since it should not be …
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Formulation & Thermophysical Analysis of a Beeswax Microemulsion & The Experimental Calculation of its Heat Transfer Coefficient
… examines the preparation of a beeswax microemulsion, the analysis of its thermophysical properties, and the experimental method to calculate its heat transfer coefficient under laminar flow conditions. First, the beeswax microemulsion was formulated to possess both a low viscosity to …
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Precipitation of barium carbonate nanoparticles within water-in-oil microemulsion systems: relations between particle growth and surfactant environment
Contains fulltext : 72087.pdf (Publisher’s version ) (Open Access)
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Small-angle X-ray and neutron scattering studies of 3-component microemulsion and micellar solution of semifluorinated copolymers
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Nuclear Engineering, 1996.
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Synthesis study of size-controlled noble metal nanoparticle systems of Re, Ir, and Os using AOT-reverse microemulsion based methodologies
… iridium (Ir), and osmium (Os) using a reverse microemulsion (AOT-ME) system, with AOT as the negatively charged surfactant to form and stabilize the MEs. These noble metals are among the least studied in their NP form, making this research a valuable contribution to the field. An important …
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Microemulsions formation, stability and their characterisations
… of the surface and colloid chemistry of various microemulsion systems stabilised by pure nonionic surfactants and alcohol as well as mixtures of nonionic and anionic surfactants. Phase equilibria and interfacial characteristics of the systems are studied with a view to their potential usefulness …
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Diffusion of proteins inside crowded structures generated using microemulsions
Microemulsions are thermodynamically stable mixtures of water, oil and surfactant. In the case of microemulsions based on sugar surfactants a cosurfactant as an additional component is necessary, most often a short-chain alcohol. In this thesis mainly pure surfactants are used. The focus is on …
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Magnetic resonance investigations of pH in microemulsions
… micelles formed in CTAB, Triton-X and AOT microemulsions. These techniques have enabled visualisation of propagating acidity fronts in the bromate-sulfite reaction using magnetic resonance imaging. Contrast agents that are sensitive to pH were investigated in aqueous and microemulsion …
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Novel Counterflow Reactor for Continuous Templated Synthesis of Semiconductor Nanocrystals
… distribution. The template consists of a stable microemulsion formed by the self-assembly of an amphiphilic block copolymer in the presence of both a polar and non-polar solvent. This microemulsion contains a group-II salt in the dispersed phase which is then contacted with a group-VI hydride gas …
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A Study of Transport of Micellar Fluids in Porous Media
… excess phases (oil and brine) flowing with the microemulsion showed significant capacitance effects, but the microemulsion did not. The absence of capacitance and higher residual saturation than those of excess phases at the same capillary number indicate that the microemulsion was probably the …
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Novas alternativas de remoção de enxofre do óleo diesel utilizando tensoativos e microemulsões
… from commercial diesel using surfactants and microemulsion systems. Its main purpose is to create new technologies and add economic viability to the process. First, a preliminary study using as extracting agent a Winsor I microemulsion system with dodecyl ammonium chloride (DDACl) and nonyl …
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