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  • Generation of materials with managed voids rating in process of forming of biological polymer of NA-sodium carboxymethyl cellulose with fine particles of AlOOH for production of functional coatings

    New highly-porous film materials were created based on NA-sodium carboxymethyl cellulose, modifyed by particles of AlOOH. Forming of covers happen as a result of relatively not high temperatures (for about 55 degrees of centigrades). A regression model was suggested which described interrelation between sizes of forming porouses in the film cover with its composition. The ability was shown to manage physical specification of the cover which named surface porosity by changing containing of AlOOH in the composition. It was shown up that porouses were formed sizes between 300 mircometers and 2500 mircometers in proccess of curing of the cover while containing of boehmite in the composition. It was discovered that the general surface porosity was 65%, and the depth of cover was 600 mircometers. The ability was shown to create covers with sliding properties as exemplified in closing of pores by solid lubrication MoS2. It was discovered that it was observable down drag by 30-50% in response to application of covers on steel faces adding down of frictional force.

    Keywords: Porosity, NA-sodium carboxymethyl cellulose, AlOOH, ntifriction material, MoS2, friction

  • Influence of ultrafine modifiers on friction properties of composite coatings

    The conditions, which must be met by modifying additives into electrolyte for receiving of the effective composite Ni-P coatings with anti-friction properties, and the possibility of choice of the effective modificators were discussed. The efficiently of the ultra-dispersion powders of oxides with the corunde and rutile structures, the carbon and boron nitride with diamond-like structures, and powders of the some W and Mg type structures was examined.

    Keywords: structural phase disordering, nanostructures, compositional coatings, nano-diamond, anti-friction properties,modifiers

  • Investigation of coatings with antifriction properties based on the hydroxide film Al(OH)3 on aluminum with a solid-lubricant coating MoS2

    The article discusses the technological capabilities of application of vibratory mechanical hard lubricant coatings on the basis of MоS2 to improve the surface quality and operational properties of parts made of aluminum with an oxide coating.

    Keywords: vibration treatment, the vibration mechano-chemical coating of solid lubricant, combined methods of treatment

  • Cleaning of natural and sewage water using new composite flocculants-coagulants

    The present work relates to the topic of green chemistry and technology of inorganic substances. In particular, it is devoted to the development of new materials for the reagent treatment of natural and waste water. The authors developed a technology for manufacturing composite materials - flocculants-coagulants on aluminum-silicon and iron-silicon base. Based on these reagents, methods were proposed for purifying natural waters, industrial wastewater and storm sewage. The authors have developed and patented a technology for producing flocculants-coagulants of this type in solid form. When creating these composites, matrix isolation methods of existing active components were used. The experimental evaluation of the effectiveness of the developed flocculants-coagulants ASFC and IFSC on real natural water and industrial wastewater is carried out. Their comparison with known analogs produced by industry is made.

    Keywords: composite flocculants-coagulants; water treatment agents; aluminum-silicon and flocculants-coagulants; iron-silicon flocculants-coagulants; matrix isolation

  • On the possibility of using boron-containing diffusion coatings on cutting tools of high speed steels

    Improving the performance of tools by improving their structural condition by method of boriding and heat treatment will ensure the rational use of expensive high alloy materials for the manufacture of cutting tools with working part having a high mechanical and operational properties, which, of course, is an urgent task for the modern machine-building production.

    Keywords: cutting tools, chemical-heat treatment, method of boriding

  • New directions of research and development in the field of nanotechnology for the creation and application of inorganic composite materials Part I

    In the paper, we give a brief overview of the main developments made personally and under the direct supervision of the professor, academician RANS andIAELPS P. Kudryavtsev. These developments are devoted to the use of sol-gel processes in various branches of science and technology. Using this process, new composite heat-resistant materials, highly disperse materials and thin filmswere created. These developments have made it possible to create new efficient catalysts and highly selective inorganic ion-exchange materials. Based on inorganic ion-exchange materials, a technology was developed to extract lithium from natural brines, which are poor in lithium content. On the basis of sol-gel technology, new composite matrix-isolated flocculants-coagulants were created. These reagents are designed for the treatment of natural and wastewater in order to remove impurities of oil products and heavy metals.

    Keywords: Nanomaterials, Sol-Gel Technology, Nanostructured Materials, Composite Materials, Highly Dispersed Materials, Thin Films, Catalysts, Highly Selective Inorganic Ion Exchangers, Extraction of Lithium, Composite Flocculants-Coagulants

  • Mediator-assisted selective oxidation of 5-hydroxymethylfurfural to 2.5-diformylfuran in the presence of collidine

    The process of 4-acetylamino-2,2,6,6-tetramethylpiperidine-1-oxyl/I2 mediated oxidation of 5-hydroxylmethylfurfural in a twophase system consisting of a methylene chloride and aqueous solution containing sodium hydrogen carbonate was investigated. It was shown that the introduction into the reaction system collidine provides selective oxidation of 5-hydroxymethylfurfural to 2,5-diformylfuran (yield 99% at a selectivity of 100%).The optimal composition of the system and the optimal conditions of synthesis were determined. A mechanism of promoting the oxidation of the OH- group of 5-hydroxymethylfurfural and protecting the further oxidation of 2,5-diformylfuran by collidine was proposed.

    Keywords: 5-hydroxymethylfurfural, 2,5-diformylfuran, nitroxyl radical, collidine

  • Re-adsorption of heavy metals in the determination of their mobile forms in ordinary chernozem

    "We studied heavy loamy calcareous ordinary chernozem developed from the loess-like loam at the Donskoe training farm in Rostov oblast. Samples from the plow (0–20 cm) layer were used in the experiment. The soil samples were contaminated with 300 mg/kg of Cu, Zn and Pb introduced in combination. The metals were introduced in the form of acetates. In was showed that under static conditions, ammonium acetate does not extract the entire stock of mobile elements. In dynamic conditions Cu, Zn и Pb were more extracted. The degree of extractable metals by ammonium acetate buffer from the soil in background and polluted soil can be presented in a series: Zn> Pb> Cu."

    Keywords: soil, readsorbtion, heavy metals, zinc, copper, lead, extraction

  • Study of heavy metal adsorption of ordinary chernozem with different proportions of solid and liquid phases

    The absorption of copper, zinc and lead ordinary chernozem loam with a changing ratio of the solid and liquid soil phases. It is shown that an increase in the ratio of 2 times solid and liquid phase adsorption capacity and retention strength of copper, zinc and lead on the surface of soil particles increases due elektroselektivnosti.

    Keywords: soil adsorption, copper, zinc, lead, ratio solid and liquid phases

  • Green nanostructured biodegradable materials Short Review Part II

    The article presents abrief overview of the work in producing and studying of environment friendly nanostructured polymeric composites. Preparation technology and main applications of the nanocellulose (NanoCell) is described. Novel environment friendly hydrophobic polymer composites were developed. These compo¬sites consist of a thick layer of cellulose substrate and a thin protective layer of a biodegradable polymer. Various types of the layer composites and their applications in production of packaging materials are described. The proposed biodegradable nanocomposite coating increases strength of the natural packaging materials and serves effective barrier against water and grease. Wastes of the novel polymer materials can be utilized in two ways: by repulping and by biodegrada¬tion. Widespread usage of the proposed polymer compo¬site materials will bring about an improvement in the ecological state of the environment. Method for preparation of the reactive nanocellulose biocarrier and discussion about its biomedical and cosmetic applications are described as well.

    Keywords: : nanocellulose, biocarier, biodegradable materials, nanocopmosite polymer coating, packaging materials , ecological safety

  • Green nanostructured biodegradable materials Short Review Part I

    The article presents abrief overview of the work in producing and studying of environment friendly nanostructured polymeric composites. Preparation technology and main applications of the nanocellulose (NanoCell) is described. Novel environment friendly hydrophobic polymer composites were developed. These compo¬sites consist of a thick layer of cellulose substrate and a thin protective layer of a biodegradable polymer. Various types of the layer composites and their applications in production of packaging materials are described. The proposed biodegradable nanocomposite coating increases strength of the natural packaging materials and serves effective barrier against water and grease. Wastes of the novel polymer materials can be utilized in two ways: by repulping and by biodegrada¬tion. Widespread usage of the proposed polymer compo¬site materials will bring about an improvement in the ecological state of the environment. Method for preparation of the reactive nanocellulose biocarrier and discussion about its biomedical and cosmetic applications are described as well.

    Keywords: : nanocellulose, biocarier, biodegradable materials, nanocopmosite polymer coating, packaging materials , ecological safety

  • Nanostructured Composites Based on Interpenetrated Polymer Networks Kinds, Classification, Properties, Synthesis, Application

    Using an interpenetrating polymer networks (IPN) principle in production of composite materials provides an unique possibility to regulate their both micro- and nano- structures and properties. By changing the IPN formation conditions (as a resultof polymerization and ratio of components, temperature, pressure, catalyst content, introduction of filler and or ionic group) one may obtain the material with desirable properties.Different types of IPN are prepared by using traditional polymers: polyurethanes, including nonisocyanate polyurethanes, epoxies and acrylates; non- organic fillerscan be used as the cluster system.The article discussestheir basic synthesis methods for IPNs their principal features and characteristics.

    Keywords: interpenetrating polymer networks, crosslinked polymers, classification of IPN, properties of IPN

  • Nanostructured Composites Based on Interpenetrated Polymer Networks Nonisocyanate Polyurethanes Based on Cyclic Carbonates and Nanostructured Composites Part II

    Recent advances in chemistry and technology of nonisocyanate polyurethane (NIPU) materials based on cyclic carbonate oligomers are reviewed in this paper. Reaction of the cyclic carbonate and amino groups results in β-hydroxyurethane fragments with specific properties. Primary attention is given to the hybrid materials that contain epoxy and acrylic compounds, especially materials based on renewable raw materials. Hybrid organic composites comprising of silanes are also considered. An overview of the recent publications in this field is provided with a more detailed description of achievements by the authors and their corporate employees. The use of NIPU materials as coatings, adhesives, and foams is described.

    Keywords: nonisocyanate polyurethanes, cyclic carbonate oligomers, hybrid polymers

  • Nanostructured Composites Based on Interpenetrated Polymer Networks Nonisocyanate Polyurethanes Based on Cyclic Carbonates and Nanostructured Composites Part I

    Recent advances in chemistry and technology of nonisocyanate polyurethane (NIPU) materials based on cyclic carbonate oligomers are reviewed in this paper. Reaction of the cyclic carbonate and amino groups results in β-hydroxyurethane fragments with specific properties. Primary attention is given to the hybrid materials that contain epoxy and acrylic compounds, especially materials based on renewable raw materials. Hybrid organic composites comprising of silanes are also considered. An overview of the recent publications in this field is provided with a more detailed description of achievements by the authors and their corporate employees. The use of NIPU materials as coatings, adhesives, and foams is described.

    Keywords: nonisocyanate polyurethanes, cyclic carbonate oligomers, hybrid polymers

  • The theoretical model of the laser excitation of acoustic signals in a liquid medium with the presence of nano-sized objects

      Now nanotechnologies are one of perspective methods of diagnostics in medical practice. Nanoparticles can be used as contrast agents for medical ultrasonic introscopy due to their adhesion to tumor cells and bacteria. The mathematical model of the laser excitation of acoustic signals in a liquid medium with the presence of the nanotubes was developed and numerically studied. Increasing of the level of photo acoustic signal was shown.

    Keywords: Opt acoustic effect, nanotubes, and model