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Sonoloading of nano-TiO2 on sono-alkali hydrolyzed polyester fabric

Hashemizad, Shiva, Montazer, Majid, Mireshghi, Seyed Saeed
The journal of the Textile Institute 2017 v.108 no.1 pp. 117-122
Escherichia coli, alkaline hydrolysis, antibacterial properties, bacteria, discoloration, fabrics, irradiation, methylene blue, nanoparticles, polyesters, scanning electron microscopy, solar radiation, titanium dioxide
This study presents alkali hydrolysis of polyester fabric surfaces in an ultrasound bath allowing the loading of nano-TiO ₂ by wet chemical technique. The loaded fabrics showed a significant photo-activity under day light irradiation in normal conditions which discolored persistent stains of methylene blue as a cationic dye. The discoloration of stain on the fabric loaded with TiO ₂ was monitored quantitatively to define the effect of hydrolysis as a surface pre-treatment on the photo-activity of finished fabrics. The SEM images confirmed more TiO ₂ nanoparticles entrapped in the voids created by the alkali hydrolysis of the fabrics. All nano-treated samples showed acceptable antibacterial properties against pathogenic micro-organisms including E. coli (Gram-negative) and S. aureus (Gram-positive) as the rate of bacteria growth inhabitation was higher for sono-alkali hydrolyzed samples rather than the others.