Nanocomposite of polystyrene foil grafted with metallaboranes for antimicrobial activity

0486864 - ÚACH 2019 RIV NL eng J - Journal Article
Benkocká, M. - Kolářová, K. - Matoušek, J. - Semerádtová, A. - Šícha, Václav - Kolská, Z.
Nanocomposite of polystyrene foil grafted with metallaboranes for antimicrobial activity.
Applied Surface Science. Roč. 441, MAY (2018), s. 120-129. ISSN 0169-4332. E-ISSN 1873-5584
R&D Projects: GA MŠMT(CZ) LM2015073
Institutional support: RVO:61388980
Keywords : Antimicrobial activity * Chemical grafting * Metallaboranes * Piranha solution * Polystyrene * Surface properties
OECD category: Inorganic and nuclear chemistry
Impact factor: 5.155, year: 2018

The surface of polystyrene foil (PS) was chemically modified. Firstly, the surface was pre-treated with Piranha solution. The activated surface was grafted by selected amino-compounds (cysteamine, ethylenediamine or chitosan) and/or subsequently grafted with five members of inorganic metallaboranes. Selected surface properties were studied by using various methods in order to indicate significant changes before and after individual modification steps of polymer foil. Elemental composition of surface was conducted by using X-ray photoelectron spectroscopy, chemistry and polarity by infrared spectroscopy and by electrokinetic analysis, wettability by goniometry, surface morphology by atomic force microscopy. Antimicrobial tests were performed on individual samples in order to confirm antimicrobial impact. Our results show slight antibacterial activity of PS modified with SK5 for Escherichia coli in comparison with the rest of the tested borane. On the other hand molecules of all tested metallaboranes could easier pierce through bacterial cell of Staphylococcus epidermidis due to absence of outer membrane (phospholipid bilayer). Some borane grafted on PS surface embodies the strong activity for Staphylococcus epidermidis and also for Desmodesmus quadricauda growth inhibition.
Permanent Link: http://hdl.handle.net/11104/0282015