Multifunctional polypyrrole@maghemite@silver composites: synthesis, physico-chemical characterization and antibacterial properties

0490820 - ÚMCH 2019 RIV SK eng J - Článek v odborném periodiku
Zasońska, Beata Anna - Acharya, Udit - Pfleger, Jiří - Humpolíček, P. - Vajďák, J. - Svoboda, Jan - Petrovský, Eduard - Hromádková, Jiřina - Walterová, Zuzana - Bober, Patrycja
Multifunctional polypyrrole@maghemite@silver composites: synthesis, physico-chemical characterization and antibacterial properties.
Chemical Papers. Roč. 72, č. 7 (2018), s. 1789-1797. ISSN 0366-6352
Grant CEP: GA ČR(CZ) GA17-05095S
Institucionální podpora: RVO:61389013 ; RVO:67985530
Klíčová slova: polypyrrole * maghemite * silver conductivity
Obor OECD: Polymer science; Physical geography (GFU-E)
Impakt faktor: 1.246, rok: 2018

Maghemite (γ-Fe2O3) nanoparticles were synthesized by coprecipitation of ferrous and ferric salts with ammonia and oxidation with sodium hypochlorite. Polypyrrole (PPy) was obtained, by the chemical oxidative polymerization of pyrrole in an aqueous solution in the presence of iron oxide nanoparticles. The morphology of PPy was turned from globular to nanofibers by addition of dyes. The resulting PPy@γ-Fe2O3 hybrid composites were characterized by transmission electron microscopy, magnetic and electrical conductivity measurements and energy dispersive X-ray spectroscopy. Both the electrical conductivity and magnetic properties of the PPy@γ-Fe2O3 nanocomposites were controlled by the maghemite content due to the insulating properties of magnetic iron oxide nanoparticles added to the conducting polymer. Antibacterial activity of all materials was defined by determination of minimal inhibitory concentration. Antibacterial properties of native materials were improved by the reduction of silver ions from an aqueous solution to obtain PPy@γ-Fe2O3@silver composites. Due to the antibacterial properties of these composites, especially of those with silver particles, they can be considered for the applications where bacterial contamination can deteriorate the functionality of material.
Trvalý link: http://hdl.handle.net/11104/0284956