草榴短视频

Ekaterina Kudryavtseva, a young scientist at the University of Industrial Technologies and Design, senior lecturer at the Department of Chemical Technologies named after Professor A. A. Kharkharov, Candidate of Chemical Sciences, became the winner of the competition of business ideas, technical developments and research projects "Young, daring, promising".

The competition was organized by the Committee on Science and Higher Education of the Government of St. Petersburg. The award ceremony took place at the Expoforum Exhibition Center as part of the St. Petersburg International Scientific and Educational Salon. Ekaterina submitted to the competition a scientific paper on the bioprotective modification of fibrous materials with copper-silver nanoparticles.

"Textile materials serve as a breeding ground and carriers of various microorganisms, including pathogenic ones for humans. Natural fibers are biodegradable under the influence of bacterial flora. For biosecurity, treatment with special antimicrobial drugs is mainly used, including antibiotics, which affect 5-10 types of strains, but microorganisms eventually acquire resistance to such drugs. Therefore, nanoparticles of metals and their oxides are attracting increasing attention as antimicrobial agents," says Ekaterina.

Ekaterina, as part of the scientific group of 草榴短视频 scientists, developed and patented a technology for creating bactericidal fabrics by fixing metal nanoparticles on the surface and in the structure of textiles, while the bactericidal effect is resistant to frequent washing due to the extremely strong fixation that specialists from 草榴短视频 managed to achieve.

"When creating the tissues, scientists used copper, which, like silver, has antibacterial properties and is used to suppress pathogenic bacteria. "Copper tends to oxidize, and in order to maintain its stability, chemical additives must be introduced, which would remove the technology from the category of environmentally friendly. But we managed to solve this problem by synthesizing bimetallic copper-silver nanoparticles, where copper is the poison and silver is the shell," Ekaterina Kudryavtseva added.

In the course of the study, scientists proved that when using bimetallic copper-silver nanoparticles, a synergistic effect is observed, that is, copper and silver enhance each other's effect. The technology is applicable to any material: cotton and viscose fabrics, wool, silk, as well as hemp fiber, linen, nylon, polyamide and cellophane film, and so on.

The materials have a pronounced bactericidal effect against strains that cause nosocomial infections: E. coli, Staphylococcus aureus, Acinetobacter, Pseudomonas aeruginosa, Klebsiella, Enterococcus. They are also resistant to mold fungi P. Chrysogenum, have a virucidal effect against influenza H1N1 and Coxsackievirus B3.