A5081732489- Nanoparticles: synthesis and applications
- Material Properties and Applications
- Graphene and Nanomaterials Applications
- biodegradable polymer synthesis and properties
- Polymer Science and Applications
- Advanced Theoretical and Applied Studies in Material Sciences and Geometry
- Welding Techniques and Residual Stresses
- Metal and Thin Film Mechanics
- Polymer Nanocomposite Synthesis and Irradiation
- Vacuum and Plasma Arcs
- Nanomaterials for catalytic reactions
- Material Properties and Failure Mechanisms
- Polymer Nanocomposites and Properties
- Nanotechnology research and applications
- Laser-Ablation Synthesis of Nanoparticles
- Medical and Biological Ozone Research
- Conducting polymers and applications
- Surfactants and Colloidal Systems
- Carbon Nanotubes in Composites
- Advanced Polymer Synthesis and Characterization
- Microplastics and Plastic Pollution
- Magnetic confinement fusion research
- Epoxy Resin Curing Processes
- Polymer composites and self-healing
- Hydrogels: synthesis, properties, applications
E.O. Paton Electric Welding Institute
2015-2025
National Academy of Sciences of Ukraine
2016-2025
Institute of Macromolecular Chemistry
2014-2023
Institute of Physics
2015-2017
National Academy of Sciences
2009-2014
The Welding Institute
2012
Welding Institute (Slovenia)
2010
International Atomic Energy Agency
1989-1993
Abstract Silver‐containing composites formed by sputtering deposition on the surface of polylactide (PLA) films have been developed; they contain a layer silver nanoparticles different thicknesses depending time, namely 1, 3 and 5 min. It was found that with time min thickness ca 100 nm is formed. The average size Ag 5.9 nm, specific area S sp 97 m 2 g −1 . samples obtained were characterized wide‐angle X‐ray scattering, TEM, TGA DSC their antimicrobial, antiviral cytotoxic properties...
Antimicrobial and antiviral nanocomposites based on polylactic acid (PLA) chitosan were synthesized by a thermochemical reduction method of Ag+ ions in the PLA-Ag+-chitosan polymer films. Features structural, morphological, thermophysical, antimicrobial, antiviral, cytotoxic properties PLA-Ag-chitosan studied X-ray diffraction (XRD), transmission electron microscopy (TEM), differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), studies. The effects temperature duration...
Abstract The objective of this work is to study the peculiarities structural organization, morphology, thermomechanical, electrical and antimicrobial properties nanocomposites based on pectin-polyethyleneimine interpolyelectrolyte complexes silver nanoparticles in dependence type reducing agent being applied for chemical reduction ions interpolyelectrolyte-metal complexes. average size Ag shown be increased with decreasing activity ( E 0 ) equals 3.8 nm, 4.3 15.8 respectively, when engaging...
Green synthesis of silver-containing nanocomposites based on polylactide (PLA) was carried out in two ways. With the use green tea extract, Ag+ ions were reduced to silver nanoparticles with their subsequent introduction into PLA (mechanical method) and polymer matrix PLA-AgPalmitate (PLA-AgPalm) (in situ method). Structure, morphology thermophysical properties PLA-Ag studied by FTIR spectroscopy, wide-angle X-ray scattering (WAXS), transmission electron microscopy (TEM), thermogravimetric...
One of the most important directions in development additive manufacturing or three-dimensional (3D) printing technologies is creation functional materials, which allow not only prototyping but also products with properties. In this paper, poly-lactide acid (PLA) /carbon black (CB) composites segregated (ordered) structure have been created. Computer simulation based on Mamunya geometrical model showed that CB content within φ = 2.5–5 vol.% polylactide matrix leads to formation a continuous...
Problem statement. The vibroacoustic monitoring method requires further improvement, especially in establishing clear links between the measured diagnostic parameters and characteristic defects of environment structure. It is necessary to integrate data develop risk indicators geotechnical system stability loss for automatic recognition defects, taking into account use method. Purpose study. Improvement structures destruction control search cracks localization mine workings, underground deep...
To create film materials with antimicrobial properties, silver nanoparticles are widely used, which introduced, in particular, into polymer matrices. In this work, a mixture of polylactide-polycaprolactone polymers, taken mass ratio 80–20, was used as base. These studies will further contribute to the development new safe materials, particularly creating packaging for food products, is undoubtedly an urgent problem today. The work aimed silver-containing composites based on polylactide and...
Вступ. Забезпечення глобального зв’язку має вирішальне значення для постачання вантажів водним транспортом у чітко встановлені терміни. Таким чином, вагомим є надійність суднових радіолокаційних систем. При цьому надійної експлуатації систем необхідно контролювати стан їх зовнішніх поверхонь, зокрема лакофарбових покриттів. Отже, метою роботи розроблення математичних моделей прогнозування характеристик полімерних покриттів призначених захисту поверхонь засобів навігації. Результати. Для...
The article is concerned with hybrid amorphous polymers synthesized basing on epoxy oligomer of diglycide aliphatic ester polyethylene glycol that was cured by polyamine and lithium perchlorate salt. Structural peculiarities organic-inorganic polymer composites were studied differential scanning calorimetry, wide-angle X-ray spectra, infrared spectroscopic, electron microscopy, elemental analysis, transmission reflective optical microscopy. On the one hand, results showed introduction LiClO4...
As it is known, polyethylene (PE) one of the common materials in modern world, and PE products take major share on industrial trade markets. For example, various types technical like PE-63, PE-80, PE-100 have wide applications, i.e., construction, for pipeline systems etc. A rapid development plastics industry outstrips detailed investigation welding processes welds' formation mechanism, so they remain unexplored. There still no final answer to question how weld's microstructure forms. Such...
The structural organization and thermomechanical properties of nanocomposites prepared from interpolyelectrolyte–metal complex (IMC) involving anionic polyelectrolyte, pectin AgNO3, cationic poly(4-vinylpyridine), have been investigated using the methods wide- small-angle X-ray scattering analysis. It is established that chemical reduction Ag+ ions in IMC by sodium borohydride results formation nanocomposite based on "pectin–poly(4-vinylpyridine)" interpolyelectrolyte (IPEC) Ag0...
Applying wide-angle X-ray scattering method, thermomechanical analysis, and differential scanning calorimetry, the structural organization properties of nanocomposites formed by chemical reduction Сu2+ cations in interpolyelectrolyte–metal complex (pectin–Cu2+–polyethyleneimine) under influence a constant magnetic electric fields have been studied. It has found that Cu2+ bulk leads to formation nanocomposite consisting interpolyelectrolyte complex, including pectin–polyethyleneimine...
In the present work, ion-conductive hybrid organic-inorganic polymers based on epoxy oligomer of diglycide aliphatic ester polyethylene glycol (DEG) and lithium perchlorate (LiClO4) were synthesized. The effect LiClO4 content electrophysical properties has been studied by differential scanning calorimetry (DSC) broadband dielectric spectroscopy (BDS). structure wide-angle X-ray scattering (WAXS). It was found that impacts synthesized polymers, probably, formation coordinative complexes...
A mathmatical model of electromagnetic processes occurring in the ‘arc column – anode region evaporating anode’ system is presented. The electric arc with an metallic described by a model, under which non-equilibrium near plasma containing atoms and ions evaporated metal, along ambient (inert) gas, subdivided into space charge layer immediately adjoining surface ionisation adjacent to column. This allows determining potential drop between welding depending on current density temperature...
The paper presents results of the investigation structure relaxation and thermal properties PE-80 PE-100 polyethylene hot-tool butt welds. It was found that a weld with re-crystallized crystalline is formed during welding dissimilar types polyethylene. shown within long period (1 year) occurs not only in amorphous but also phase (crystalline α-form transforms into mixed αβ-form), respective changes properties.
Thermophysical properties and the percolative behavior of systems based on polyethylene glycol carbon nanotubes formed under normal conditions action a dc electric field have been studied, by using differential scanning calorimetry impedance spectroscopy methods. It is shown that substantially affect dispersed in polymer matrix. Nanotubes are supposed to execute three basic types motion (rotation, translation, migration) action, corresponding characteristic times calculated. found...