In the present work, zinc oxide (ZnO) nanoparticles were synthesized by direct precipitation method in aqueous solution using zinc acetate dihydrate and sodium hydroxide as precursors. The molar ratio of Zn2+ to OH– was 1:2. The obtained precipitated compound was treated at different temperatures. The crystal phase and structural parameters of each prepared ZnO samples such as interplanar spacing, crystallite size, dislocation density, micro strain were determined by X-ray diffraction (XRD) analysis for different crystallographic planes. Other crystallite parameters such as lattice constants, unit cell volume, Zn–O bond length, crystallinity of synthesized ZnO samples also were calculated from the XRD data. The XRD patterns show the successfully synthetized ZnO phase with wurtzite hexagonal structure and average crystallite sizes of 24.6 nm, 25.6 nm and 28.1 nm for the samples that dried at room temperature without heat treatment (S1), dried at 60°C without calcination (S2), dried at 60°C and calcinated at 300°C in air atmosphere for 2 hours (S3) respectively. The calculated structural parameters of the synthesized ZnO nanoparticles are in good agreement with the standard reported data (JCPDS 36-1451). The effect of heat treatment on the structural parameters of synthesized ZnO nanoparticles was examined and it indicates that increasing the thermal decomposition temperature improves the quality of crystalline material. The XRD data show that the synthesized S3 sample was free of impurities and characterized by lattice constants a = 3.252 Å, c = 5.210 Å, unit cell volume V = 47.703 Å3, bond length Zn–O = 1.9789 Å and crystallinity 93%. The results are of practical value for simple synthesis of highly dispersed forms of ZnO and its possible application in textile finishing.

The purpose of the work is to develop an antimicrobial composition and study the effectiveness of antimicrobial treatment of textile materials. Methodology. Polyhexamethylene guanidine chloride with bio-based antimicrobial preparations were used as the objects of the study as effective safe antimicrobial agents. The treatment of cotton fabric was carried out by impregnation with an aqueous solution of polymer and polyhexamethylene guanidine chloride and bio-based antimicrobial preparations in a finishing bath, followed by drying and thermal fixation. Changes in the structural parameters of the acrylic polymer and the number of crosslinks in the bulk of the polymer formation were determined from the property of crosslinked polymer systems to swell in solvents to a limited extent. Examination of the antimicrobial effect of textile materials was carried out by analyzing the diffusion of the fabric disk on agar after treatment with the antimicrobial composition and after washing. To determine the effectiveness of the antimicrobial action of bio-based preparations, one of the representatives of the wound microflora, the gram-positive bacterium Staphylococcus pyoqenes from the Ukrainian collection of microorganisms, was used as a test culture. Findings. The results of the study of textile materials after treatment with bio-based antimicrobial preparations and polyhexamethylene guanidine chloride are presented. An increase in the resistance of the antimicrobial effect to washing was achieved by introducing an acrylic polymer into the finishing composition, the structure formation of which was evaluated by the amount of the acetone-insoluble fraction of polymer films during extraction in solvents. The results of the study showed that the introduction of antimicrobial agents into the polymer composition increases the degree of crosslinking of the polymer film due to the use of polyhexamethylene guanidine chloride. The effectiveness of the antimicrobial action of bio-based preparations has been proven by the results of a study on a test culture of a gram-positive bacterium Staphylococcus pyoqenes, which is confirmed by the appearance of a zone of inhibition of the microorganism around the studied fabric sample. Studies using the settle plate method showed that all fabric samples treated with the antibacterial composition are characterized by a pronounced zone of microflora growth inhibition. Originality. It has been proven that an acrylic polymer-based finishing composition containing polyhexamethylene guanidine chloride and bio-based preparations provides an antimicrobial effect to a textile material and will improve the wash resistance of the antimicrobial effect by increasing the degree of crosslinking of the acrylic polymer. Practical value. The obtained results of the experiment are of practical importance for the development of new finishing compositions for imparting antimicrobial properties to textile materials.

The purpose of the work is to develop an antimicrobial composition and study the quality of antimicrobial treatment of cotton textile materials. An aqueous solution of polyhexamethylene guanidine chloride was used as an object of study as an effective, safe antimicrobial agent. To increase the stability of the treatment to washing, additives of glycidyl ethers capable of crosslinking reaction, with epoxy groups of different functionality and mass fraction were studied. The treatment of cotton fabric was carried out by impregnation with an aqueous solution of polyhexamethylene guanidine chloride and glycidyl ethers in a finishing bath, followed by drying and curing. Checking the antimicrobial effect of cotton fabric was carried out by the settle plate method by analyzing the diffusion of the fabric disc on agar after treatment with an antimicrobial composition and after washing. The paper presents the results of a study of the quality of cotton fabric treatment from the use of polyhexamethylene guanidine chloride and various glycidyl ethers in the antimicrobial composition to increase the resistance to washing. The efficiency of inhibition of bacterial contamination from the environment of fabric samples treated with the antimicrobial composition was established. The results of the experiment showed that almost all fabric samples modified with polyhexamethylene guanidine chloride and glycidyl ethers are characterized by a pronounced zone of inhibition of microflora seeded from the air, but a composition containing butyl cellosolve monoglycidyl ether with a mass fraction of epoxy groups of 16.0 – 20.0% has a greater resistance to washing. It has been proven that the introduction of butyl cellosolve monoglycidyl ether with a mass fraction of epoxy groups of 16.0 – 20.0% into a finishing composition based on polyhexamethylene guanidine chloride makes it possible to provide an antimicrobial effect of a textile material and increase the resistance of the antimicrobial effect to washing. The obtained results of the experiment are of practical importance for the development of new finishing compositions in order to impart antimicrobial properties to textile materials.