An important basis for the creation of medical clothing is realization of the influence of various factors that arise in the interaction of elements of the system "man–clothes–production environment". Given the increasing technogenic burden on health of both medical staff and hospital patients, the assessment of the role of medical clothing in forming the energy balance of direct consumers is extremely relevant. Previous studies have experimentally confirmed the presence of energy effects of textile materials on the human body. However, determination of the nature of the impact is a complex task, which solution depends on a number of factors, such as the raw material composition, its structure, surface characteristics, etc. The purpose of our paper is to study the development of textile multifunctional materials for medical purposes and to study their energy-information impact on the human body. The following tasks have been solved in the course of the study. For use in the medical field, several samples of textile materials with antimicrobial properties, modified by herbal preparations, were obtained. Properties of textile materials that determine the possibility of their use in medical practice have been investigated. The influence of the experimental samples on the functional state of the organs and systems of human organs by use of the methods of information-wave therapy is evaluated.
PurposeThe purpose of this article is the development of up-to-date equipment for making nanocomposites for investigation of the antimicrobial properties of nanotextiles and the creation of a scientific base to choose materials of clothing with a special purpose.Design/methodology/approachInvestigations are focussed on modifying the surface of textile materials by metal ions nanoparticles (AgJ, CuJ). The work of the equipment is based on the creation of metal nanocomposites in polyethyleneglycol (PEG). It is heated up to a temperature of not more than 130ºС, followed by adding the dispersion of metal in small portions to water. Nanoparticles are uniformly distributed on material surface that provides the improvement of its characteristics.FindingsIt has been found that modifying natural fibrous materials by nanoparticles of metal ions (AgJ, CuJ) promotes increasing their bactericidal and fungicidal properties with a comparison with traditional cotton materials. Microbiological investigations of antimicrobial properties of the cotton fabric have been conducted according to their effects on staphylococcus bacteria, E. coli and fungi.Research limitations/implicationsThis research is limited to cotton fabrics. Therefore, other fabric types can be investigated to expand the data basis in the future.Practical implicationsThe main practical point of developed equipment is that it can be used for obtaining bactericidal and fungicidal properties of natural and fibrous materials modified by nanoparticles of metal ions (AgJ, CuJ). That provides new characteristics of textile materials that can be used in the future for special clothing tailoring.Social implicationsThe use of engineering equipment will allow in perspective to produce clothes with bactericidal and fungicidal properties, which can improve people’s lives through the prism of health and finished product quality.Originality/valueSpecial equipment for investigation of antimicrobial properties of nanomodified textile materials of different kinds has been engineered, and there is an opportunity to create materials with antibacterial and antifungal properties. The application of this equipment provides the receiving of new characteristics for textile materials with silver ions nanoparticles. Such properties of nanomodified materials are useful for human health and can be used in the production of various textile products.
Purpose. Establishment of the influence of the content of sand and modifying additives on the hardness, compressive strength, and impact strength of polymer concrete compositions. Methodology. Polymer concrete compositions in the form of round pancakes, sticks and bars based on polyester resin of the CHROMOPLAST GP 2000 brand, hardener (organic peroxide for cold curing) of the Luperox K1 brand, cobalt stearate (cobalt salt of stearic acid), styrene and river sand were subject of investigation. Samples of polymer concrete composites were obtained in two stages: 1) mixing the resin with sand 2) the addition of hardener, styrene and cobalt stearate. To obtain a hardened polyester composition, metal forms with bent sides were used; ceramic boats (not enameled) metal molds 2 cm high. Preparation of the composition was carried out in the following sequence: first, resin was mixed with sand, then hardener, cobalt stearate and styrene were added. The following sequence of preparation of the composition also took place: first the resin and hardener were mixed, only then sand mixed with styrene and cobalt stearate was added. The forms were loaded into a heating cabinet and heated to a temperature of 100 °C for 30-40 minutes. After cooling in the form of the product was removed. The hardness, compressive strength and toughness of the developed compositions were investigated by standard methods. Results. It was found that an increase in sand content from 0 to 90% of the mass. in polymer concrete compositions leads to an increase in hardness by ~ 466%, as well as a decrease in compressive strength by ~ 62% and impact strength by ~ 50%. Scientific novelty. An increase in the hardness index and a decrease in the compressive strength and toughness of polymer concrete compositions with an increase in the sand content to 90 % of the mass was established. This is because the sand has a higher hardness than the polyester resin, and accordingly, an increase in its content leads to an increase in the hardness of the composition. The decrease in compressive strength and toughness is due to a decrease in the amount of binder, due to which the composition becomes more fragile. Practical value. The developed polymer concrete compositions can be used in construction, as well as for repairing damaged concrete surfaces and eliminating cracks.
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