2019 (4) 3

Influence of the type of reducing agent on the structure, morphology thermomechanical and antimicrobial properties of silver-containing nanocomposites

V.L. Demchenko1, A.S. Kruk2, S.V. Riabov1, N.P. Rybalchenko3, S.M. Kobylinskyi1, L.A. Goncharenko1, O.V. Moskalenko2

¹Institute of Macromolecular Chemistry NAS of Ukraine

48, Kharkivske shose, Kyiv, 02160, Ukraine

²Nizhyn State University named after Nikolay Gogol

2, Grafska str.Nizhyn, 16600,  Ukraine

³Institute of Microbiology and Virusology named after D.K. Zabolotny NAS of Ukraine

154, Zabolotnogo str., Kyiv, 03143, Ukraine

Polym. J., 2019, 41, no. 4: 240-245.

Section: Structure and properties.

Language: Ukrainian.

Abstract:

The objective of this work is to study the peculiarities of structural organization, morphology, thermomechanical and antimicrobial properties of nanocomposites based on pectin-polyethyleneimine polyelectrolyte complexes and silver nanoparticles in dependence of the type of reducing agent, which was applied for chemical reduction of silver ions. It was shown that the average size of Ag nanoparticles was increased with decreasing the power of reducing agent and equals 3,8; 4,3 and 17,3 nm when using sodium borohydride, hydrazine and ascorbic acid respectively. It was found that the crystallite size of Ag also was the smallest for NaBH4 as reducing agent, although the narrowest size distribution of silver nanoparticles in the polymer matrix is observed when reducing silver ions by hydrazine. The influence of the size of silver nanoparticles in the polymer matrix on the antimicrobial activity of nanocomposites has been established. The inhibition zone diameter of Staphylococcus aureus and Escherichia coli were the highest (19 and 20 mm, respectively) for the nanocomposite obtained using hydrazine.

Keywords: Polyelectrolyte complexes, polyelectrolyte-metal complexes, silver containing nanocomposite, structure, morphology, antimicrobial activity.

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