A1OOH/Fe_2O_3 Modified Cellulose Acetate Microfibers: Synthesis, Properties and Antibacterial Activity

摘要

In present work the AlOOH-Fe_2O_3 modified cellulose acetate fibres were prepared by a two-step method. Firstly, the cellulose acetate fibres were treated in aluminum nanoparticles aqueous suspension followed by their water oxidation. The nanoparticles react with water with the flower-shape boehmite AlOOH nanostructures formation. Secondly, AlOOH-modified fibres were treated with Fe_2O_3 nanoparticles water suspension. Fe_2O_3 nanoparticles were previously obtained by hydrolysis of iron acetate. The color of the modified fibres changed from white to brown. The physical and chemical properties of the nanoparticles and fibres were characterized by transmission electron microscopy, scanning electron microscopy, X-ray diffraction, energy dispersive X-ray spectroscopy, adsorption of nitrogen and electrophoretic mobility. The antibacterial activity of fibres against E. coli, P. aeruginosa, S. aureus and MRSA was studied. Reduction of the concentration of viable bacteria reached 100% after exposure of the bacteria to AlOOH-Fe_2O_3 modified fibres for 1 h. The viability of L 929 mouse fibroblast cell line in presence of fibres was investigated.