Superhydrophilic polystyrene nanofiber materials generating O.sub.2./sub.(.sup.1./sup.Δ.sub.g./sub.): postprocessing surface modifications toward efficient antibacterial effect

0432253 - FZÚ 2015 RIV US eng J - Journal Article
Henke, P. - Kozak, Halyna - Artemenko, Anna - Kubát, Pavel - Forstová, J. - Mosinger, Jiří
Superhydrophilic polystyrene nanofiber materials generating O₂(¹Δ_g): postprocessing surface modifications toward efficient antibacterial effect.
ACS Applied Materials and Interfaces. Roč. 6, č. 15 (2014), s. 13007-13014. ISSN 1944-8244. E-ISSN 1944-8252
R&D Projects: GA ČR GAP108/12/0910; GA ČR GA13-12496S
Institutional support: RVO:68378271 ; RVO:61388955 ; RVO:61388980
Keywords : antibacterial * nanofiber * photo-oxidation * singlet oxygen
Subject RIV: BO - Biophysics
Impact factor: 6.723, year: 2014

The surfaces of electrospun polystyrene (PS) nanofiber materials with encapsulated 1% w/w 5,10,15,20-tetraphenylporphyrin (TPP) photosensitizer were modified through sulfonation, radio frequency (RF) oxygen plasma treatment, and polydopamine coating. The nanofiber materials exhibited efficient photogeneration of singlet oxygen. The postprocessing modifications strongly increased the wettability of the pristine hydrophobic PS nanofibers without causing damage to the nanofibers, leakage of the photosensitizer, or any substantial change in the oxygen permeability of the inner bulk of the polymer nanofiber. The increase in the surface wettability yielded a significant increase in the photo-oxidation of external polar substrates and in the antibacterial activity of the nanofibers in aqueous surroundings.
Permanent Link: http://hdl.handle.net/11104/0236684