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Effect of proton irradiation on the optical properties of thermal control coating based on polystyrene with silica filler

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Propulsion and Power Research 2024年第1期13卷 1-11页

作者： n.i.cherkashina V.i.Pavlenko M.M.Mikhailov A.n.Lapin S.A.Yuriev R.V.Sidelnikov D.S.Romanyuk Belgorod State Technological University named after V.G.Shoukhov Kostyukov Str.46Belgorod 308012Russia Tomsk State University of Control Systems and Radioelectronics 40Prospect LeninaTomsk 634050Russia

This paper presents the results of studying the surface properties changes of a ther-moregulating coating based on polystyrene and silicafiller after proton irradiation with an en-ergy of 50 keV at afluence of 3�1015 cm�*** proton irradiation,the values of the contact angle of wetting with water increase by 3.5%and 14.9%for polystyrene and the coating,*** free surface energy(energy of the surface layer)of polystyrene and the coat-ings before and after proton irradiation was calculated using the Owens-Wendt-Rabel-Kaelble *** was a significant increase in the polarity of the polystyrene surface(gp increased by a factor of 2.2)after proton *** the coating,an increase in gp by a factor of 3.89 was observed after proton *** changes in the coating were presented by iR Fourier spectroscopy.A slight decrease in the absorption intensity of all characteristic bands compared to the unirradiated sample was *** was found that the irradiation of the coating with protons led to the formation of macromolecules with hydroxyl,carbonyl,and carboxyl bonds,as well as the formation of dimeric and oligomeric siloxane *** was also found that after irradiation of a pure polystyrene sample with protons,the value of the solar absorption as increased by only 4.2%;whereas for the coating with silicafiller,the value of as increased by 28.6%.

关键词： Thermal control coating Proton irradiation Hydrophobicity Free surface energy Radiation crosslinking

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Thermosensitive and Wound-Healing Gelatin-Alginate Biopolymer Hydrogels Modified with Humic Acids

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Journal of Renewable Materials 2024年第10期12卷 1691-1713页

作者： Denis Miroshnichenko Vladimir Lebedev Katerina Lebedeva Anna cherkashina Sergey Petrushenko Olena Bogoyavlenska Anzhela Olkhovska ihor Hrubnyk Liudmyla Maloshtan natalja Klochko The Department of Oil Gas and Solid Fuel Refining TechnologiesNational Technical University«Kharkiv Polytechnic Institute»Kharkiv61002Ukraine The Department of Plastics and Biologically Active Polymers Technology National Technical University«Kharkiv Polytechnic Institute»Kharkiv61002Ukraine Faculty of Physics V.N.Karazin Kharkiv National UniversityKharkiv61000Ukraine Technical University of Liberec Liberec46117Czech Republic The Department of Organizations and Management Healthcare and Social Medicine National Technical University«Kharkiv Polytechnic Institute»Kharkiv61002Ukraine The Common Pharmacy Department National Technical University«Kharkiv Polytechnic Institute»Kharkiv61002Ukraine Department of Micro-and nanoelectronics National Technical University«Kharkiv Polytechnic Institute»Kharkiv61002Ukraine

The main goal of the article is the creation and study of thermosensitive and wound-healing gelatin-alginate bio-polymer hydrogels modified with humic *** rheological properties,swelling and contraction behavior were experimentally investigated,elucidated using Fourier transform infrared spectroscopy and used to achieve the physiological melting point,which is necessary for successful drug *** has been shown that in the gelatin-alginate-humic acid biopolymer hydrogels systems,it is possible to obtain a gel-sol transition temperature close to the physiological temperature of 37℃,which is important for drug delivery in the treatment of *** changing the type and concentration of humic acids in the gelatin-alginate hydrogel,it turned out to be achiev-able to regulate the softening time of the gel on the human body in the range from 6 to 20 min,which provides the possibility of controlled prolonged delivery of *** on the study of the influence of calcium ions on the properties of humic acids and ion exchange,as well as the interaction of humic acids,sodium alginate and gelatin with the formation of tighter gel networks,approaches to regulate the rate of softening of hydrogels at physiological temperature and their swelling,which simulates the absorption of exudate,were proposed and *** addition,low shrinkage of the hydrogel surface due to cross-linking of gelatin-alginate networks when modified with humic acids was experimentally confirmed,which is important for avoiding problems of wound contracture and contour deformations when using dressings for wound ***,the developed opti-mized innovative biopolymer hydrogels synergistically combine the outstanding properties of natural molecular polymers and humic acids and are promising for the creation of effective medicines for wound healing.

关键词： Gelatin-alginate hydrogel humic acids wound healing rheological properties swelling thermosensitivity contraction

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