ISSN:
1662-0356
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Natural Sciences in General
,
Technology
Notes:
In order to avoid large problems regarding peering of the titania layer coated on thesubstrate, we developed an epoch-making “strong titania fiber” consisting of photoactive surfacelayer with a nanometer-scale compositional gradient, which can effectively oxidize any kind oforganic materials. An effective water-purification system using this fiber has been also developed.The basis of this technology is to incorporate a selected low-molecular-mass additive (Ti(OC4H9)4)into a precursor polymer from which the ceramic forms. After melt-spinning the resulting precursorpolymer, thermal treatment of the spun fiber leads to controlled phase separation (“bleed-out”) of theadditive; subsequent calcination stabilizes the compositionally changed surface region, generating afunctional surface layer. This fiber consists of the silica-based core-structure and the gradient-likesurface titania layer, which are strongly sintered. We also developed a water-purifier using this fiber(felt material). Any bacteria (common bacterium, legionera pneumophila, colon bacillus,heterotrophic bacteria, and so forth) and organic chemicals (dioxin, PCB, and so forth) wereeffectively decomposed into CO2 and H2O passing through the above purifier
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/42/transtech_doi~10.4028%252Fwww.scientific.net%252FAST.45.2118.pdf
Permalink