Antibacterial properties of biocides based on silver nanoparticles and organic acids

Christina Shakhbazova; Marina Gaidym; Alexandra Vishnevich; Maria Rubtsova; Dmitry Kopitsyn; Andrey Novikov

doi:10.15826/chimtech.2025.12.3.05

Antibacterial properties of biocides based on silver nanoparticles and organic acids

Christina Shakhbazova, Marina Gaidym, Alexandra Vishnevich, Maria Rubtsova, Dmitry Kopitsyn, Andrey Novikov

Abstract

The paper proposes a method for synthesizing nanocomposites with silver nanoparticles and sorbic acid or 4-hydroxybenzoic acid as components of antibacterial coatings. A synergistic effect was found by combining two biocides (metal ions and acid). The application of the developed synthesis technique made it possible to obtain silver nanoparticles with a particle size distribution of 1–6 nm on halloysite and up to 10 nm on sepiolite. Using thermogravimetric analysis, it was found that the maximum loading of acids into carrier pairs is observed at the carrier:acid ratio of 1:1. According to spectrophotometric data on the release of sorbic acid and 4-hydroxybenzoic acid from the pores of halloysite and sepiolite in an aqueous medium, the release of acids is observed for 150–200 min. The largest diameter of the growth inhibition zones (mm) of Staphylococcus aureus (strain 119 (MRSA 45)) is shown by the samples with sorbic acid (13–15 mm).

Keywords

silver nanoparticles; antibacterial activity; sorbic acid; 4-hydroxybenzoic acid

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DOI: https://doi.org/10.15826/chimtech.2025.12.3.05

Copyright (c) 2025 Christina Shakhbazova, Marina Gaidym, Alexandra Vishnevich, Maria Rubtsova, Dmitry Kopitsyn, Andrey Novikov

This work is licensed under a Creative Commons Attribution 4.0 International License.

Chimica Techno Acta, 2014–2025
eISSN 2411-1414
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