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Synthesis of Iron Nanoparticles by Thermal Decomposition of Diironnonacarbonyl in Ionic Liquid and Their Potential Use as Nanotracers for Mixer Studies in Liquids Feeds

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Advances in Chemical Engineering and Science 2020年第3期10卷 201-209页

作者： Irina Irgibaeva nikolay barashkov Tamara Sakhno Artur Mantel Svetlana Mendigaliyeva Irina barashkova Yuriy Sakhno Eurasian National University Nur-Sultan Kazakhstan Micro-Tracers Inc. San Francisco CA USA Poltava University of Economics and Trade Poltava Ukraine Institute of Chemical Physics Russian Academy of Sciences Moscow Russia University of Delaware Newark DE USA

Iron nanoparticles with dynamic light scattering median diameter around 10 nm have been prepared by thermal decomposition under a nitrogen atmosphere from diironnonacarbonyl (DINC) dissolved in n-butyl-3-methylimidazolium tetrafluoroborate (BMIMBF). The effect of temperature changes in the range of 170°C - 200°C and changes in concentration of DINC in BMIMBF in the range of 0.1% - 0.9% on the properties of obtained iron nanoparticles has been investigated. The stable dispersion of iron nanoparticle in ethanol has been prepared after separation of nanoparticles from ionic liquid by centrifugation following by their re-dispersion in ethanol. The possibility of quantitative analysis of iron content in ethanol dispersion by deposition of ferromagnetic nanoparticles on the surface of plastic-protected neodymium magnet, dissolution of iron in hydrochloric acid and addition of ammonium thiocyanate solution following by spectrophotometric determination of iron cations at wavelength of 490 nm has been investigated. The feasibility of using the same approach in case of addition of ethanol dispersion of iron nanoparticles to the liquid animal feeds for evaluation of efficiency of their mixing has been discussed.

关键词： Ionic Liquids Magnetic Nanoparticles Surfactant Mixing Performance Ani-mal Feed

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Ionic Liquids and Deep Eutectic Solvents and Their Use for Dissolving Animal Hair

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Advances in Chemical Engineering and Science 2020年第1期10卷 40-51页

作者： Tamara V. Sakhno nikolay N. barashkov Irina S. Irgibaeva Svetlana Mendigaliyeva Dulat S. Bostan Poltava University of Economics and Trade Poltava Ukraine R&D Micro-Tracers Inc. San Francisco CA USA Department of Chemistry Eurasian National University Astana Kazakhstan

In recent years, one of the priority areas of research in chemistry has become the processes carried out in an environment of liquid organic salts, the so-called ionic liquids (ILs), which are assessed as environmentally friendly or “green” alternatives to conventional organic solvents. ILs are non-volatile, highly polar solvents that dissolve many organic, inorganic, and organometallic compounds. Since they have no detectable vapor pressure, ILs are considered as potential substitutes for volatile organic compounds traditionally used as solvents. So-called deep eutectic solvents (DES) is a group of ILs that are liquid mixtures of a number of organic and (or) inorganic components taken in a certain ratio (eutectic or close to eutectic). DES deserve a special attention due to their negligible saturated vapor pressure, availability, low cost, as well as ability to dissolve at relatively high concentration of metal salts, metal oxides and various polymers. Particularly DES based on a mixture of choline chloride with urea (DES-1) or a mixture of choline chloride and adduct of urea with hydrogen peroxide (DES-2) give eutectics that are liquid at ambient temperature and have unusual solvent properties, including an ability to dissolve an animal hair in the presence of low concentration of sodium sulfide or ammonium thioglycolate. It was found that depending on the ratio between DES-1 and DES-2 in the mixture of two Deep Eutectic Solvents and the nature of sulfur-containing additive, the solubility of rabbit hair under used conditions, varies from 51% to 79%.

关键词： Deep Eutectic Solvents Ionic Liquids Polymer Solubility Keratin Hydrogen Bonds Animal Hair

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Polymer Coatings for Protection of Wood and Wood-Based Materials

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Advances in Chemical Engineering and Science 2016年第2期6卷 93-110页

作者： Tamara V. Sakhno nikolay N. barashkov Irina S. Irgibaeva S. V. Pustovit Yuriy E. Sakhno Poltava Department of Academy of Sciences of Technological Cybernetics of the Ukraine Poltava Ukraine R&D Micro-Tracers Inc. San Francisco CA USA Department of Chemistry Eurasian National University Astana Kazakhstan Institute of Information and Innovative Technologies Poltava State Agrarian Academy Poltava Ukraine Poltava Institute of Economics and Law at the University “Ukraine” Poltava Ukraine

Three major types of protective coating of wood and wood-based materials have been considered. These three types include the coatings based on carboxyl-containing water-soluble polymers which are easily cross-linked by inorganic salts or OH-containing compounds, pH-sensitive coatings and polymer multi-layer structures. First of three mentioned approaches allows affecting permeability and enhancing the prevention the loss of water from the surface of wood to its surrounding. The advantage of the second approach is its ability to vary and purposely adjust the polymer composition and the number and distribution of -COOH groups in the chain which make the originally water-soluble polymers completely insoluble. The strong feature of the third approach which includes broad use of hydrogen-bonded films produced by layer-by-layer self-assembly is the possibility of manipulation of coatings stability after construction.

关键词： Protective Coatings Polymer Films pH-Sensitivity Water-Soluble Polymers Hydrogen Bonds Self-Assembly

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