scholarly journals Development of organosilicon decorative coating with craquelure effect

2020 ◽  
Vol 64 (10) ◽  
pp. 85-89
Author(s):  
Alexander A. Kirillov ◽  
◽  
Sergey P. Mikheev ◽  
Mikhail V. Kuzmin ◽  
Nikolay I. Koltsov ◽  
...  
Keyword(s):  
Bubble Formation ◽  
Bottom Layer ◽  
Decorative Coating ◽  
Functional Additives ◽  
Dissolution Properties ◽  
Heat Resistant Coating ◽  
Mechanical Adhesion ◽  
Film Forming ◽  
Corrosive Environments ◽  
Layer Coating

The article analyzes coatings based on organosilicon compounds and presents the results of research on the selection components of compositions that provide protection of painted products from corrosive environments, mechanical and thermal effects. Defects of paint and varnish coatings are investigated. The expediency of modifying organosilicon film-forming compositions with solutions bead polymers of polymethyl methacrylate and polybutyl methacrylate has been substantiated. To obtain a heat-resistant coating, two compositions were developed for the lower and upper layers. The bottom layer was KO-85 organosilicon varnish modified with solutions of bead polymers and PF-060 alkyd varnish. To regulate the wetting and spreading, surfactants were introduced into the bottom layer, which could improve the structural, mechanical and decorative properties of the coatings. The top layer of the coating with the craquelure effect was KO-868 silicone enamel modified with functional additives that increase the surface tension and reduce the spreadability of the resulting composition. Research has been carried out on the physica-mechanical (adhesion, impact strength, elasticity of the film during bending), decorative (change in gloss, color, dirt retention, chalking) and protective (cracking, peeling, weathering, bubble formation, corrosion of metaln, wrinkling, dissolution) properties of a two-layer coating, as well as its resistance to water, gasoline, mineral oil and temperature.

Modern devices for treatment of the surgeon’s hands and the surgical field (literature review)

2020 ◽  
pp. 41-50
Author(s):  
Artem Mikhailovich Morozov ◽  
◽  
Alexey Nikolaevich Sergeev ◽  
Gennady Alexandrovich Dubatolov ◽  
Nikolay Alexandrovich Sergeev ◽  
...  
Keyword(s):  
Cost Effective ◽  
Surgical Infection ◽  
Operating Field ◽  
Functional Additives ◽  
Literary Sources ◽  
Film Forming ◽  
Key Points ◽  
Surgical Field ◽  
Ammonium Compounds ◽  
Active Substances

The aim – analyze modern Russian and foreign literary sources in order to determine modern means for treating the hands of the surgeon and the operating field. Results. One of the key points in the prevention of surgical infection is the treatment of the surgeon’s hands and the operating field with effective skin antiseptics in order to destroy pathogenic and opportunistic microorganisms that colonize intact skin. In modern practice, skin antiseptics are predominantly used containing alcohols as active substances, in particular ethyl, propyl and isopropyl, halogenated substances such as iodine and iodophores, guanidines, which include chlorhexidine digluconate, as well as quaternary ammonium compounds. Moreover, the most widespread are combined preparations containing several active substances and functional additives, which makes it possible to neutralize the negative properties of various active substances. Also, an interesting and promising direction is the use of polymer operating films or film-forming antiseptics. Currently, research is being actively carried out aimed at finding and developing modern highly effective antiseptic agents and their rational combinations that meet the necessary requirements, are optimal in their properties, cost-effective and comfortable to use.

Lubrication Properties of Aqueous Solutions with Polyethoxylated Ether (PEOE) Added

2011 ◽  
Vol 239-242 ◽  
pp. 1359-1363
Author(s):  
Chao Hui Zhang ◽  
Si Si Liu ◽  
Yue Tao Sun ◽  
Jun Ming Liu
Keyword(s):  
Aqueous Solution ◽  
Aqueous Solutions ◽  
Metal Working ◽  
Functional Additives ◽  
Film Forming ◽  
Minor Influence ◽  
Forming Characteristics ◽  
Aqueous Surfactants ◽  
A Minor ◽  
Lubrication Properties

Aqueous solutions have found broad usages as lubricants, in conjunction with other possible utilizations, such as in metal working and other industries. Due to the inferior lubricity, functional additives are needed to improve their tribological performances among which aqueous surfactants are exclusively included. The film forming property of aqueous solution with polyethoxylated ether added (PEOE) is measured, taking consideration of the influences of the temperature and the concentration. The addition of PEOEs into aqueous solutions will largely increase the film forming capacity. But the concentration has only a minor influence on the lubrication property of the aqueous solutions with PEOEs. The cloud point will strongly alter the film forming characteristics.

scholarly journals Selection and evaluation of single-layer coating compositions in corrosive environments

2011 ◽  
Vol 59 (5) ◽  
pp. 53-64 ◽  
Author(s):  
Jiří Hanuš
Keyword(s):  
Sheet Steel ◽  
Single Layer ◽  
Aqueous Environment ◽  
Liquid Manure ◽  
Accelerated Corrosion ◽  
Corrosion Tests ◽  
Water Based ◽  
Single Layer Coating ◽  
Corrosive Environments ◽  
Layer Coating

The objective of the work was to select a suitable methodology for accelerated corrosion tests of single-layer coating compositions (hereinafter referred to as CC), to assess the condition of coatings during corrosion tests and to evaluate the resistance of the monitored single-layer CCs after the completion of the tests in selected corrosive environments. The results were used for the determination of the potential use of the selected single-layer coating compositions in agricultural environments. The following single-layer, water-based CCs were applied to sheet steel samples: V 2026, Aquapol_J and Denapox EZ. The following synthetic CCs were selected: AR 40-00, Krahokryl_J and ACS 20-ST. The resistance of these coatings was tested in 5 corrosive environments: in NaCl environment according to CSN EN ISO 7253, in SO2 environment according to CSN EN ISO 3231 and in the environment of a condensation chamber with de-ionized water according to CSN 03 8131. To simulate agricultural environments, solutions of the Cererit fertilizer and pig semi-liquid manure were selected. The samples were left in the condensation chamber in aqueous environment according to CSN 03 8131 for 8 hours and then soaked in Cererit or semi-liquid manure and left in the laboratory environment for 16 hours. Samples were evaluated according to CSN EN ISO 4628-1, 2, 3. The water-based CC Denapox EZ and the synthetic CC AR 40-00 reached the best results.

scholarly journals Simple Double-Layer Coating for Efficient Daytime and Nighttime Radiative Cooling

Atmosphere ◽  
2021 ◽  
Vol 12 (9) ◽  
pp. 1198
Author(s):  
Mourad Benlattar ◽  
Issam Ibourk ◽  
Rahma Adhiri
Keyword(s):  
Double Layer ◽  
Large Scale ◽  
Outer Space ◽  
Solar Spectrum ◽  
Bottom Layer ◽  
Solar Irradiation ◽  
Radiative Cooling ◽  
Atmospheric Window ◽  
Thermal Emitters ◽  
Layer Coating

The passive radiative cooling approach refers to the physical process that pumps heat into outer space via the atmospheric window (8–13 μm) without energy input. The ability to continuously adjust the emissivity of thermal emitters in the sky window while maintaining high reflectivity in the solar spectrum remains a challenge. In order to achieve this task, a novel design referred to as double-layer nanoparticle-based coating is proposed. Our proposed emitter is appropriate for both high solar reflection and strong mid-infrared emissivity. The bottom and top layers are Al2O3 embedded with Ni nanoparticles and a super-hydrophilic TiO2-SiO2 layer. The bottom layer is designed to achieve high emissivity in “the atmospheric transparency window”. The top layer is designed to block solar illumination and to favor an enhanced cleanability of the coated design. Our double-layer coating as an optical solar reflector has excellent solar irradiation ( and is strongly emissive (0.97) across the “full sky window” at room temperature. Furthermore, a detailed numerical energy study has been performed, evaluating the temperature reduction and the radiative cooling performance under different conditions. The proposed simple coating can be used as an efficient radiative cooler on a large scale for energy conservation and thermoelectric devices.

Characteristic of the wear of a tool coating based on amorphous carbon during chipboard milling

2020 ◽  
Vol 111 ◽  
pp. 53-59
Author(s):  
Paweł Czarniak ◽  
Karol Szymanowski ◽  
Peter Panjan
Keyword(s):  
Amorphous Carbon ◽  
Single Layer ◽  
Bottom Layer ◽  
Rf Magnetron Sputtering ◽  
Maximum Value ◽  
Tool Coating ◽  
Clearance Face ◽  
Positive Effect ◽  
Layer Coating ◽  
Tool Durability

Characteristic of the wear of a tool coating based on amorphous carbon during chipboard milling. The study verified the durability and the course of wear during the durability tests of the TiAlN / a-C:N double tool coating. The aforementioned coating consisted of a bottom layer of TiAlN and a top layer based on nitrogenenriched amorphous carbon. Standard replaceable cutters for milling heads made of WC-Co sintered carbide were subjected to the modification process. The coating was applied using plasma by RF Magnetron Sputtering. During the tests, the blade wear was measured using a workshop microscope. The VB max indicator measured on the clearance face was adopted as the blunting criterion and its maximum value was set on 0,2 mm. The results show that the additional coating of amorphous carbon contributed to the increase of the tool durability determined with cutting distance. The use of only a single layer based on TiAlN shortened the durability by about 3%. On the other hand, applying both the bottom and top layers TiAlN /a-C:N) extended the cutting distance by about 24%. The research showed a clear advantage in terms of the durability of the blades modified with a multi-layer coating in relation to a single-layer. Moreover, the positive effect of the top layer containing amorphous carbon on tool durability has been demonstrated.

Block Foam Glass with Plasma Protective and Decorative Coatings

2019 ◽  
Vol 974 ◽  
pp. 96-100
Author(s):  
Vasiliy S. Bessmertniy ◽  
Diana O. Bondarenko ◽  
Sofia V. Varfolomeeva ◽  
Alexey V. Makarov
Keyword(s):  
Foam Glass ◽  
Plasma Jet ◽  
Front Surface ◽  
Glass Block ◽  
Decorative Coating ◽  
Plasma Burner ◽  
Heat Resistant ◽  
Resistant Coating ◽  
Heat Resistant Coating

An innovative energy-saving technology for producing block foam glass with a protective decorative coating has been developed, including the preliminary application of an intermediate heat resistant coating followed by the application of the main coating and the plasma jet melting. The optimal composition of the intermediate heat resistant coating, its preparation technology and laying on the front surface of the foam glass block are determined. It is shown that the main factor shaping the quality of the foam glass insulating block with a protective decorative coating is the speed of the plasma burner movement with a plasma jet on the front surface of the foam block glass with a preliminary applied two-layer heat resistant protective decorative coating. The formation regularity of the front layer texture of a protective and decorative coating on the plasma jet speed to the enclosing foam glass block has been established. It is shown that at the optimum plasma processing speed of 10 mm/s, a continuous, high-quality protective and decorative coating is formed. The features of the phase composition and microstructure of a multilayer heat resistant protective decorative coating are investigated. It is established that the surface layer is represented by an amorphous vitreous phase.

scholarly journals A BLOCK OF THERMAL INSULATION MATERIALS WITH PROTECTIVE AND DECORATIVE COATINGS

2020 ◽  
pp. 4-10
Author(s):  
V. Bessmertnyy ◽  
Dmitriy Kochurin ◽  
Diana Bondarenko ◽  
Lyudmila Bragina
Keyword(s):  
High Speed ◽  
Foam Glass ◽  
Acid Resistance ◽  
Amorphous Layer ◽  
Glass Block ◽  
Alkali Resistance ◽  
Decorative Coating ◽  
Heat Resistant ◽  
Resistant Coating ◽  
Heat Resistant Coating

scientific and technological principles of alternative plasma technology for the production of two-layer heat-resistant glass-like decorative coating were developed. The compositions of the intermediate heat-resistant layer and the technology of its application to the surface of the enclosing block of foam glass are proposed. The optimal parameters of plasma melting of heat-resistant and decorative coating layers were determined. The influence of high-speed characteristics of plasma jet thermal melting on the formation of texture and performance of two-layer heat-resistant coating is established. The features of the formation of amorphous vitreous and glass-crystalline phases of a two-layer heat-resistant coating are presented. Using x-ray phase analysis, the features of the phase composition of different layers of heat-resistant coating, as well as the laws of formation of its structural elements are studied. Based on the analysis of significant experimental material, it was concluded that the formation of the upper amorphous layer with liquating regions and minor gas inclusions. The conducted researches allowed to reveal and justify the features of the structure of the layers lying under the amorphous liquating. It was found that the two-layer protective and decorative coating had high physico-chemical and physico-mechanical properties: adhesion strength to the matrix of the foam glass block-1.25 ± 0.05 MPa, microhardness-785 HV, heat resistance-122°C, acid resistance – 98.5%, alkali resistance – 95.4%.

Direct observations of radiation-enhanced transformations in glass

1983 ◽  
Vol 41 ◽  
pp. 354-355
Author(s):  
J. F. DeNatale ◽  
D. G. Howitt
Keyword(s):  
Glass Matrix ◽  
Diffusion Mechanism ◽  
Bubble Formation ◽  
Silicate Glasses ◽  
Phase Decomposition ◽  
Direct Observations ◽  
Thin Foils ◽  
Oxygen Bubble ◽  
Electron Energy Loss ◽  
Kinetics Of

The electron irradiation of silicate glasses containing metal cations produces various types of phase separation and decomposition which includes oxygen bubble formation at intermediate temperatures figure I. The kinetics of bubble formation are too rapid to be accounted for by oxygen diffusion but the behavior is consistent with a cation diffusion mechanism if the amount of oxygen in the bubble is not significantly different from that in the same volume of silicate glass. The formation of oxygen bubbles is often accompanied by precipitation of crystalline phases and/or amorphous phase decomposition in the regions between the bubbles and the detection of differences in oxygen concentration between the bubble and matrix by electron energy loss spectroscopy cannot be discerned (figure 2) even when the bubble occupies the majority of the foil depth.The oxygen bubbles are stable, even in the thin foils, months after irradiation and if van der Waals behavior of the interior gas is assumed an oxygen pressure of about 4000 atmospheres must be sustained for a 100 bubble if the surface tension with the glass matrix is to balance against it at intermediate temperatures.

Clean Electron Microscope Substrate Films Used for Micrometeorite Collection and Study

1967 ◽  
Vol 25 ◽  
pp. 366-367
Author(s):  
D. M. Davies ◽  
R. Kemner ◽  
E. F. Fullam
Keyword(s):  
Thin Film ◽  
Electron Microscope ◽  
High Altitude ◽  
Amyl Acetate ◽  
Temperature Variations ◽  
Film Forming ◽  
Film Specimen ◽  
Particulate Contaminants

All serious electron microscopists at one time or another have been concerned with the cleanliness and freedom from artifacts of thin film specimen support substrates. This is particularly important where there are relatively few particles of a sample to be found for study, as in the case of micrometeorite collections. For the deposition of such celestial garbage through the use of balloons, rockets, and aircraft, the thin film substrates must have not only all the attributes necessary for use in the electron microscope, but also be able to withstand rather wide temperature variations at high altitude, vibration and shock inherent in the collection vehicle's operation and occasionally an unscheduled violent landing.Nitrocellulose has been selected as a film forming material that meets these requirements yet lends itself to a relatively simple clean-up procedure to remove particulate contaminants. A 1% nitrocellulose solution is prepared by dissolving “Parlodion” in redistilled amyl acetate from which all moisture has been removed.

Application of TEM to Deformation, Wear, and Fracture of Ceramics

1974 ◽  
Vol 32 ◽  
pp. 472-473
Author(s):  
B. J. Hockey
Keyword(s):  
Wear Resistance ◽  
High Temperature ◽  
Mechanical Behavior ◽  
Brittle Materials ◽  
High Temperature Strength ◽  
Wide Range ◽  
Corrosive Environments ◽  
Further Development

Ceramics, such as Al2O3 and SiC have numerous current and potential uses in applications where high temperature strength, hardness, and wear resistance are required often in corrosive environments. These materials are, however, highly anisotropic and brittle, so that their mechanical behavior is often unpredictable. The further development of these materials will require a better understanding of the basic mechanisms controlling deformation, wear, and fracture.The purpose of this talk is to describe applications of TEM to the study of the deformation, wear, and fracture of Al2O3. Similar studies are currently being conducted on SiC and the techniques involved should be applicable to a wide range of hard, brittle materials.

Sign in / Sign up

Export Citation Format

Share Document