Факультет електроніки та інформаційних технологій (ЕлІТ)
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Item Catalytic Properties of Gel-Immobilized Gold Nanoparticles in Decomposition Of Hydrogen Peroxide(Sumy State University, 2015) Nurgaziyeva, E.K.; Tatykhanova, G.S.; Mun, G. A.; Khutoryanskiy, V.V.; Kudaibergenov, S.E.This paper reports the study of hydrogen peroxide decomposition catalyzed by polymer-protected gold nanoparticles (AuNPs) immobilized within polyacrylamide hydrogel. The stabilization of AuNPs was achieved using hydrophilic polymers. Embedding of AuNPs stabilized with various polymers into polyacrylamide hydrogels was carried out using three ways: “in situ” polymerization, sorption and boronhydride methods. Size, shape and morphology of AuNPs were characterized by various physicochemical methods.Item pH-sensitive Hybrid Hydrogel Materials with Incorporated Nanoparticles(Sumy State University, 2014) Kryklia, S.O.; Samchenko, Yu.M.; Poltoratska, T.P.; Konovalova, V.V.Synthesis and physico-chemical studies of new promising hybrid hydrogels based on polyvinyl alcohol (PVA) acetales and copolymer hydrogels based on vinyl monomers have been studied. Acrylamide, N-Isopropylacrylamide and Acrylic acid were used as components of interpenetrating networks based on PVA acetals. Sponge acetales of polyvinyl alcohol were used as enforcing net. Study of swelling kinetics as compared to solvents of various nature (water in various pH, ethanol, toluene etc) was carried out. IR comparative spectra were obtained for different composites. High anti-bacterial action of the synthesized nanocomposites containing silver towards gram-positive and gram-negative bacteria has been demonstrated.Item Thermo- and pH-sensitive Hydrogels with Incorporated Multi-Walled Carbon Nanotubes(Sumy State University, 2013) Korotych, O.I.; Goncharuk, A.I.; Sliusar, Yu.S.; Samchenko, Yu.M.; Starchenko, V.Yu.Carbon nanotubes (CNTs) attract great attention due to the unique combination of physical, chemical, electrical and mechanical properties which have high potential for design of nanocomposite materials with customized properties (electromagnetic shielding, high strength and electroconductivity materials), actua-tors (e.g. artificial muscles and tissues), sensors, components of microfluidic devices, etc. Usage of CNT in practical applications is limited by their lower solubility in most solvents. Remaining primary agglomer-ates of NT not only increase the amount of filler needed for percolation, but also act as imperfections under mechanical stress. Therefore, in this investigation, the influence of surfactant type and its concentration, along with sonication treating time on sedimentation behavior of multi-walled carbon nanotubes was in-vestigated. To a greater extent, the influence of monomer composition, surface-active substances, and car-bon nanotubes on gelation and physicochemical properties of thermo- and pH-sensitive hydrogels and hy-drogel nanocomposites based on N-isopropylacrylamide with carbon nanotubes were investigated too. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/35598Item Hybrid Hydrogel Materials with Incorporated Nanoparticles(Sumy State University, 2013) Samchenko, Yu.M.; Kryklia, S.O.; Poltoratska, T.P.; Суходуб, Леонід Федорович; Суходуб, Леонид Федорович; Sukhodub, Leonid Fedorovych; Isheikina, Yu.O.; Makarenko, V.I.; Konovalova, V.V.Synthesis and physico-chemical studies of new promising hybrid hydrogels based on polyvinyl alcohol (PVA) acetales and copolymer hydrogels based on vynil monomers have been studied. Acrylamide and Acrylnitrile were used as some of components that carry various fillers . Sponge acetales of polyvinyl alco-hol were used as enforcing net. The synthesized composites demonstrated high strength as compared to standard hydrogels- Yung-module varied in the range of 80 to 300 kPa depending on the extent of PVA ac-etale matrix filling with hydrogel component. The materials showed high sorbability to water and water solutions. Study of swelling kinetics as compared to solvents of various nature (water, ethanol, sunflower oil ) was carried out. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/35464Item Thermosensitive Hydrogels and Microgels Based on N-isopropylacrylamide and Acrylamide with Incorporated Magnetite(Sumy State University, 2013) Korotych, O.I.; Samchenko, Yu.M.; Ulberg, Z.R.; Суходуб, Леонід Федорович; Суходуб, Леонид Федорович; Sukhodub, Leonid FedorovychHydrogels with magnetic properties (ferrogels) are very promising for medical application, first of all, for the design of targeted delivery systems with controlled release of drugs and for magnetic hyperthermia and could be obtained using different techniques (ex- and in-situ syntheses). The present work is devoted to the study of magnetite (Fe3O4) formation inside the nanoreactors of (co)polymeric gels (hydrogels and mi-crogels) based on the derivatives of acrylic acid: N-isopropylacrylamide, acrylamide, and N,N-methylenbisacrylamide (crosslinking agent). Influence of hydrophilic–lipophilic balance of (co)polymeric templates, temperature, pH and concentration of iron cations on the magnetite formation inside polymeric matrixes were investigated along with the development of ferrogel preparation technique. Physical and chemical properties of obtained ferrogels have been studied with gravimetric analysis, thermogravimetric analysis, X-ray fluorescence spectroscopy, X-ray diffraction, optical and transmission microscopies, IR spec-troscopy, etc. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/35445