Synthetic Fibres with Coatings from Poorly Soluble Copper and Zinc Compounds and Their Bactericidal Properties
A. G. BELOBABA1, A. I. MASLIY1, A. A. GUSEV1, V. A. BURMISTROV2, E. L. ZAVYALOV3
1Institute of Solid State Chemistry and Mechanochemistry, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
2Vektor-Vita Ltd, Koltsovo, Novosibirsk Region, Russia
3Institute of Cytology and Genetics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
Keywords: синтетические волокна, катионообменные волокна, малорастворимые соединения меди и цинка, покрытия, антимикробные свойства, synthetic fibres, cation exchange fibres, slightly soluble copper and zinc compounds, coatings, antimicrobial properties
Abstract
The application possibility of the earlier elaborated preparation method of bactericidal Ag-containing coatings on synthetic fibres for the synthesis of more accessible and inexpensive bactericidal coatings based on Cu and Zn was investigated. It was identified that the transition to more active metals liable to the formation of oxides significantly hampers the synthesis of the desired compounds on the metallised surface of fibres and led to the localization of the precipitate growth and a dramatic decline in its mass. Another synthesis method of slightly soluble compounds of these metals that is based on the use of ion-exchange fibres and allows increasing the mass of the synthesizable coatings and improves the uniformity of their distribution over the surface was proposed. Coatings with slightly soluble Cu and Zn compounds (copper carbonate and a mixture of copper oxide and hydroxide, oxide and a mixture of zinc hydroxide and oxide) using FIBAN K-1 cation exchange fibres (Byelorussia) were synthesized. A comparative analysis of the antimicrobial activity of these materials on two bacterial test cultures was carried out: Staphylococcus aureus and Escherichia coli . It was demonstrated that the resulting coatings exhibited various bactericidal and bacteriostatic activities depending on the type of the material and the coating, their sample weight, type of the test strain and its contact duration with the material. In all cases, materials based on ion exchange fibres demonstrate higher antimicrobial properties. Materials with Cu- and Zn-containing coatings can be promising for the application as bactericidal filters in air and water purification systems.
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