Characterization and photocatalytic activity of TiO nanoparticles on cotton fabrics, for antibacterial masks.

The impregnation of two commercial cotton fabrics (lab coat and Indiolino) with TiO nanoparticles (TiO-NPs) was carried out. For this, two commercial cotton fabrics were dipped in titanium isopropoxide, titanium butoxide and titanium tetrachloride solutions to the TiO-NPs formation and in-situ TiO-NPs impregnation on the cotton fabric surface by the sonochemical, hydrothermal and solvothermal methods, respectively. The impregnated fabrics were characterized by ATR-FTIR, SEM-EDS, Raman, UV-Vis, DRS and tension tests.

Synthesis of Poly(2-Acrylamido-2-Methylpropane Sulfonic Acid) and its Block Copolymers with Methyl Methacrylate and 2-Hydroxyethyl Methacrylate by Quasiliving Radical Polymerization Catalyzed by a Cyclometalated Ruthenium(II) Complex.

The first example of quasiliving radical polymerization and copolymerization of 2-acrylamido-2-methylpropane sulfonic acid (AMPS) without previous protection of its strong acid groups catalyzed by [Ru(-CH-2-py)(phen)(MeCN)]PF complex is reported. Nuclear magnetic resonance (RMN) and gel permeation chromatography (GPC) confirmed the diblock structure of the sulfonated copolymers. The poly(2-acryloamido-2-methylpropanesulfonic acid)--poly(methyl methacrylate) (PAMPS--PMMA) and poly(2-acryloamido-2-methylpropanesulfonic acid)--poly(2-hydroxyethylmethacrylate) (PAMPS--PHEMA) copolymers obtained are highly soluble in organic solvents and present good film-forming ability.