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Improvement on Odour Elimination and Anti-Bacterial Activity of the Polyester Fabrics Finished with Composite Emulsions of Nanometer Titanium Dioxide-Silver Particles-Waterborne Polyurethane

¹ Department of Chemical and Materials Engineering, Nanya Institute of Technology, Jongli, Taoyuan, Taiwan, China
² Department of Textile Engineering, Chinese Culture University, Taipei, Taiwan, China
³ Department of Polymer Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan, China

^* To whom correspondence should be addressed. E-mail: ccwang{at}staff.pccu.edu.tw.

	Abstract

In this study, two bacteria and three odorous chemicals were employed to assess the anti-bacterial activity and the odor elimination abilities of fabric samples finished with nanometer titanium dioxide/nanometer silver/water-borne polyurethane (nano-TiO₂/nano-Ag/WBPU) composite emulsions. It was found that the value of odor elimination, ultraviolet light transmission, and anti-bacteria for the mixture of nano-TiO₂ and nano-Ag was higher than the summed value for the individual nano-TiO₂ and nano-Ag. The odor elimination ability for individual nano-TiO₂ was better than that for individual nano-Ag, but the anti-bacterial activity was found to follow the opposite trend. The mechanisms of the free radical formation for nano-TiO₂-Ag+ have been discussed, suggested and confirmed with the investigation of the energy gap and conductivity values for the individual and the mixed particles of nano-TiO₂ and nano-Ag. The loss of the anti-bacterial activity for the fabrics finished with the mixture of nano-TiO₂ and nano-Ag was less than 6% and 13% after 15 times' washing and 3000 times' abrasion, respectively. The practicability of the fabrics finished with nano-TiO₂/nano-Ag/WBPU composite emulsions was strongly supported by the excellent properties of odor elimination, anti-bacteria, washing fastness and abrasion resistance.

First published on September 18, 2009
Textile Research Journal 2009, doi:10.1177/0040517508100626


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