Role of Copper Ions in Resistance of Modern Polymer Composite Materials to Fungal Damage

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Abstract

Resistance of polymer composite materials to biodamage is one of the pressing problems of our time. Incorporation of Cu2O (I) in the composition of a polymer composite based on the ED-20 epoxy resin increases its biocidal properties. Under conditions of mineral and organic contamination, the area of the samples affected by micromycetes was found to decrease with increasing concentration of dispersed particles in the composite. The affected area of the samples filled with the particles encapsulated in polylactide was 1.5 times smaller than that of the composites filled with non-encapsulated particles. Сopper oxide had a toxic effect on the Aspergillus niger strain dominant on the surface of the samples, causing a decrease in the average radial growth rate on the Czapek-Dox agar medium and in the biomass weight concentration during the growth of micromycetes in a liquid medium compared to the variant without Cu2O.

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About the authors

G. Yu. Yakovleva

Kazan (Volga Region) Federal University

Author for correspondence.
Email: yakovleva_galina@mail.ru
Russian Federation, Kazan, 420008

E. A. Katsyuruba

Kazan (Volga Region) Federal University

Email: yakovleva_galina@mail.ru
Russian Federation, Kazan, 420008

E. S. Fufygina

Kazan (Volga Region) Federal University

Email: yakovleva_galina@mail.ru
Russian Federation, Kazan, 420008

M. P. Danilaev

Tupolev Kazan National Technical Research University

Email: yakovleva_galina@mail.ru
Russian Federation, Kazan, 420011

O. N. Ilyinskaya

Kazan (Volga Region) Federal University

Email: yakovleva_galina@mail.ru
Russian Federation, Kazan, 420008

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2. Fig. 1. The effect of uncapsulated and encapsulated Cu2O particles on the growth of micromycetes on the surface of polymer composite samples: a — A. niger isolated from the surface of a composite with uncapsulated particles at a concentration of 1.10% (1 — growth on the surface of the composite; 2 — growth on the surface of the agarized medium Chapek–Doks; 3 — microscopy, × 64); b — surface fouling area for 28 days of incubation.

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3. Fig. 2. Toxic effect of uncapsulated (1) and encapsulated (2) Cu2O particles on A. niger: a — average radial growth rate on agarized Chapek–Dox medium; b — growth of A. niger on agarized Chapek–Dox medium with different concentrations of Cu2O; c-biomass value during micromycete growth in liquid Chapek–Dox medium; g — growth of A. niger in Chapek–Dox liquid medium with different concentrations of Cu2O.

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