Photocatalytic activity and UV- protection of TiO2 nanocoatings on polylactic a...

• Author(s): Carneiro, Joaquim A. O. ; Teixeira, Vasco M. P. ; Nascimento, José Heriberto Oliveira do ; Neves, J. ; Tavares, P. B.
• Date: 2011
• Persistent ID: http://hdl.handle.net/1822/15107
• Origin: RepositóriUM - Universidade do Minho
• Subject(s): Titanium dioxide; Nanocoatings; Textile fibres; UV-protection; Self-cleaning
• Document Type: Article
• Language: English

Description

The application of nanocoatings in the textile finishing is increasingly being explored because they open a whole new vista of value-addition possibilities in the textile sector. In the present work, low temperature pulsed DC magnetron sputtering method was used to create functional TiO2 nanocoatings on poly(lactic acid) textile fibres surfaces. In this study, the principal objectives in the application of TiO2 nanocoatings to textile materials are to impart UV protection functions and self-cleaning properties to the textile substrates. The TiO2 films were characterized by X-ray diffraction, scanning electron microscopy, atomic force microscopy, transmission electron microscopy, UV-visible spectroscopy and contact angle analysis. The Photocatalytic activity of the films was tested by measuring the photodegradation rates of rhodamine-B dye aqueous solution under UV light irradiation. The ultraviolet protection function was tested according to the Australian/New Zealand standards. It was observed that the TiO2 nanocoatings on poly(lactic acid) fibres showed an excellent ultraviolet protection (>40) function and the photocatalytic efficiency was maintained even after a strong washing treatment.