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Showing 1 to 20 of 49 for “"Dodecane"”.
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Application of Extended DLVO Theory: Modeling of Flotation and Hydrophobicity of Dodecane
… area occupied by molecules indicated that, the dodecane molecules might present between two surfactant ions at interface, thus the hydrophobicity of oil/solution interface was less sensitive to the addition of the surfactant than that of air/solution interface. Thermodynamic analysis suggested …
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Microbial oxidation of dodecane and tridecane into a,w-dicarboxylic acids using recombinant Yarrowia lipolytica
a,w-Dicarboxylic acids are reactive intermediates, widely used as raw materials to synthesise products such as perfumes, hot-melting adhesives, engineering plastics and high quality lubricants. These acids can be obtained via chemical or biological routes by using various feedstocks such as linear …
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The Beckmann and Schmidt rearrangements as an approach to the synthesis of diazabiphenylenes
… trans, cis-3, 9-diazatricyclol [6,4,0,0 2,7] dodecane-4, 10-dione on the basis of its spectroscopic properties and those of its N,,N' –dimethyl and N,N'-dibenzyl derivatives. Single ring expansion of the diketone gave mainly cis, trans, cis 3-azatricyclo [6,3,0,0 2,7] undecane-4,9-dione, and a …
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Effects of silica nanoparticle surface treatment and average diameter on the physical and mechanical properties of poly(dimethylsiloxane)-silica nanocomposites
… Young's elastic modulus, mass increase due to dodecane absorption after 10 minutes, and advancing and receding water contact angles were measured for each nanocomposite. PDMS-silica nanocomposites containing untreated silica nanoparticles were found to have a higher Young's elastic modulus than …
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Adsorption of organic friction modifiers at static and sheared interfaces
… an industrially relevant OFM, at the iron oxide-dodecane interface is investigated under static conditions and under applied shear. The study of the interface under applied shear is facilitated by the use of a novel sample environment, referred to as the tribometer, for neutron reflectometry (NR) …
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Ethoxylated amine surfactants as model additives for engine friction reduction
… (E1812), is investigated both in bulk dodecane and at the hematite/dodecane interface, to shed light on its friction-reducing mechanism. Chapter 3 examines the self-assembly of E1812 in dodecane through pendant drop tensiometry and small angle neutron scattering (SANS). The surfactant …
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Approaches to the synthesis of diazabiphenylenes
… cis,trans,cis-4,10-diazatricyclo[6,4,0,0 2,7]- dodecane-3,9-dione as the major product. The Schmidt reaction of the diketone gave the known cis,trans,cis- 3,9-diazatricyclo[6,4,0,0 2,7]dodecane-4,10-dione, which was converted into its N,N'-dibenzyl derivative. The two dilactams were reduced to …
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The synthesis and properties of some higher membered fused alicyclic ring systems
… reaction to the synthesis of bicyclo-[0.5.5]-dodecane derivatives was abandoned because of the difficulty of preparing the required amino intermediates. The use of an intramolecular Grignard condensation for the synthesis of alicyclic ring systems has also been investigated. This approach was …
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NMR Studies of Emulsions in Porous Media and Applications to Fischer-Tropsch Synthesis
… NMR measurements at ambient conditions, where dodecane and water were model compounds for FT products. The relaxation results indicated that water was the surface wetting phase, while dodecane was isolated from the pore surface. Spontaneous dodecane-in-water droplets formed, suggested by the …
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New Liquid Crystalline [2]Rotaxanes
… between dumbbells and rotaxanes. The dodecane chain was sufficiently fluid to induce smectic mesomorphism in both the dumbbell and [2]rotaxane, with [2]rotaxane forming SmA phase by POM and XRD analysis. Chapter 3 presents an extension to Chapter 2 with the addition of longer straight …
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Molecular-level modelling of complex liquid interfaces
… several interfacial properties of water and dodecane at the {1014} surface of calcite. A series of different initial water configurations were investigated at two different temperatures. Partial density analysis demonstrated a significant increase in the density distribution of water at the …
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Synthesis and properties of novel cage-functionalized crown ethers and cryptands.
… oxahexacyclo[5.4.1.02,6.03,10.05,9.08,11] dodecane "cage" moiety. In alkali metal picrate extraction experiments the cryptand exhibited high avidity towards Rb+ and Cs+, when compared with the corresponding model compound. A computational study of a series of cage-functionalized cryptands …
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Polymerization in Confined Space
… the polymerization was a colloid of water/SDS/dodecane/pentanol. The colloidal was stable through the polymerization process only at specific compositions. The system revealed a lamellar water structure which housed the gamma initiated reaction prior and after polymerization the lamellar was …
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Liquid-phase adsorption of n-paraffins on type 5A molecular sieves
… n-eicosane was lower than for n-hexadecane and n-dodecane corresponding to a lower equilibrium loading capacity and lower overall mass transfer coefficient. The values of individual external, internal, theoretical and experimental overall mass transfer coefficient were determined. The internal …
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A Detailed Treatment of the Measurement of Transport Coefficients in Transient Grating Experiments
… determined as was shown for pure toluene, pure dodecane and the symmetric mixture of isobutylbenzene-dodecane. Mass and thermal diffusion was studied in the three symmetric mixtures of dodecane, isobutylbenzene and tetralin. The obtained diffusion and Soret coefficients agree with the literature …
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Auto-Ignition of Liquid n-Paraffin Fuels Mixtures as Single Droplets Using Continuous Thermodynamics
… to n-hexadecane, the second ranging from n-dodecane to n-eicosane, and the third being a combination of the first two mixtures to produce a “dumbbell” mixture. Discrete and continuous mixture models of the ASTM standard distillation test were compared to design the experimental mixtures and …
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Self-Replenishing, Wear-Resistant and Anti-Sticking Surfaces Based on Liquid Impregnation of Microstructured Mesoporous α-AI₂O₃ [Alpha Alumina] Matrices
… impregnating liquids such as water, Hexadecane, Dodecane, Fomblin® oil and 3M HFE 7200 were employed in conjunction with various alumina matrix densities ranging from 70 to 99.5 %. Fomblin® oil was found to be the most efficient impregnating liquid. Indeed, anti-sticking and pinning free sliding …
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Application of electrospun fiber membranes in water purification
… than 8 kPa. Microfiltration of emulsions of oil (dodecane) in water using electrospun PA6(3)T membranes was demonstrated. Rejection of the emulsified dodecane decreased from (85 +/- 5) % to (4.3 +/- 0.9) % when the ratio of droplet diameter to fiber diameter (dp/df) decreased from 2.5 +/- 0.4 to …
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Enzymology of dicarboxylic acid metabolism in Corynebacterium sp. strain 7E1C
… dicarboxylic acid were obtained during growth on dodecane although significant amounts of tetradecanedioic acid were produced during growth on methyl myristate. No dicarboxylic acid was produced during growth on hexadecane, methyl palmitate or 16-hydroxypalmitate.3.Corynebacterium 7E1C possesses …
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