Antimicrobial Properties of Cotton Fabric-Ni, Dyed with Substantive Dye Stilbeno-Vogo Range

Purpose of the study. Study of the possibility of imparting an antimicrobial effect to cotton-based fabric at the stage of dyeing with substantive dyes as an alternative to the existing methods of finishing.

Methods. Synthesis of a substantial stilbene disazo dye containing a fragment of salicylic acid by diazotization and azo coupling reactions, confirmation of the dye structure by infrared spectroscopy and liquid chromatography with mass spectrometric detection; experimental dyeing of cotton fabric with the obtained dye; checking the obtained fabric samples for antimicrobial activity in relation to eight test strains of microorganisms.

Results. Diazotization of 4,4'-diaminostilbene-2,2'-disulfonic acid and subsequent coupling of the obtained diazo compound with salicylic acid gave the substantive dye 5,5 '- {[(E-ethene-1,2-diyl) bis (3-sulfo-4,1-phenylene) bis (diazen-2,1-diyl)]} bis-2-salicylic acid. Samples of cotton fabric dyed with synthesized disazo dye were obtained. Studies have shown that for a fabric sample treated with 5,5 '- {[(E-ethene-1,2-diyl) bis (3-sulfo-4,1-phenylene) bis (diazen2,1-diyl)]} bis-2-salicylic acid using the technology of dyeing with substantive dyes, there is no growth of colonies of pathogenic microorganisms within the boundaries of a fabric fragment in contact with a pre-seeded nutrient medium. The dyed fabric samples were treated with solutions of zinc and copper salts, the presence of metal ions recorded on the dyed fabric was confirmed by atomic emission analysis. It was found that the subsequent treatment of the dyed fabric with zinc and copper salts is not accompanied by a significant change in color and does not lead to an increase in the antimicrobial activity of the material obtained.

Conclusion. The studies have shown the potential for imparting an antimicrobial effect to cellulose fabric within the technological regime of dyeing with the obtained substantive dye. It was found that the treatment of dyed fabric with zinc and copper salts does not lead to significant changes in color and does not increase the observed antimicrobial effect.

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