Příprava a testování vybraných nátěrových barev a laků s antimikrobiálním účinkem
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Date
2023-01-31
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Abstract
Mikroorganismy vyskytující se na dotykových plochách představují velký problém a riziko přenosu různých onemocnění. Cílem této práce je vyvinutí povlaku, který bude dotykové, zejména dřevěné plochy pokrývat. Základem tohoto povlaku je antimikrobiální složka, připravená metodou sol-gel, která je zabudována do nátě-rových barev a laků. K dosažení požadovaných vlastností povlaku byly použity 3 metody. Nejdříve byl do nátěrových hmot zabudován antimikrobiální gel v mokrém stavu, což se prokázalo jako neúčinná metoda, jelikož nevznikla souvis-lá vrstva a gel se začal lepit. Následně se zabudovávala sušina tohoto gelu, což z počátku vypadalo na velmi nadějnou metodu, nicméně po delší době se na těch-to povlacích začalo redukovat stříbro a metoda se tak stala nepoužitelnou. Po-slední metodou bylo přímé nanesení antibakteriálního solu na substrát natřený nátěrovými hmotami. Povlaky připravené touto metodou byly velmi účinné z hlediska mikrobiologického hodnocení na bakteriální kmeny Escherichia coli a Staphylococcus aureus. Mohou se dále využívat na venkovní i vnitřní dřevěné sub-stráty, například lavičky, stoly a židle nebo zábradlí. Jejich využití ale není omeze-no pouze na dřevo a povlaky se dají uplatnit také v městské hromadné dopravě nebo v nemocnicích.
Microorganisms occurring on the contact surfaces pose a major problem and risk of transmitting various diseases. The aim of this work is to develop a coating that will cover contact, especially wooden surfaces. The basis of this coating is an an-timicrobial component, prepared by the sol-gel method, which is built into paints and varnishes. 3 methods were used to achieve the required coating properties. First, a wet antimicrobial gel was incorporated into the painting substances, which proved to be an ineffective method as a continuous layer did not form and the gel began to stick. Subsequently, the dry matter of this gel was incorporated, which at first looked like a very promising method, however, after a long time, silver began to be reduced on these coatings and the method thus became unusable. The last method was the direct application of an antibacterial sol on a substrate coated with paints. The coatings prepared by this method were very effective in terms of microbiological evaluation on bacterial strains of Escherichia coli and Staphylo-coccus aureus. They can also be used on outdoor and indoor wooden substrates, such as benches, tables and chairs or railings. However, their use is not limited to wood and coatings can also be used in public transport or hospitals.
Microorganisms occurring on the contact surfaces pose a major problem and risk of transmitting various diseases. The aim of this work is to develop a coating that will cover contact, especially wooden surfaces. The basis of this coating is an an-timicrobial component, prepared by the sol-gel method, which is built into paints and varnishes. 3 methods were used to achieve the required coating properties. First, a wet antimicrobial gel was incorporated into the painting substances, which proved to be an ineffective method as a continuous layer did not form and the gel began to stick. Subsequently, the dry matter of this gel was incorporated, which at first looked like a very promising method, however, after a long time, silver began to be reduced on these coatings and the method thus became unusable. The last method was the direct application of an antibacterial sol on a substrate coated with paints. The coatings prepared by this method were very effective in terms of microbiological evaluation on bacterial strains of Escherichia coli and Staphylo-coccus aureus. They can also be used on outdoor and indoor wooden substrates, such as benches, tables and chairs or railings. However, their use is not limited to wood and coatings can also be used in public transport or hospitals.
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antimikrobiální vrstva, povlaky, metoda sol-gel, nátěrové hmoty, hybridní vrstva, antimicrobial layer, coatings, sol-gel method, painting substances, hybrid layer