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The photostability of wool doped with photocatalytic titanium dioxide nanoparticles
journal contribution
posted on 2009-02-01, 00:00 authored by Hu Zhang, K R Millington, Xungai WangPhotoyellowing of wool is a serious problem for the wool industry. This study assessed the role of photocatalytic nanocrystalline titanium dioxide (P-25) as a potential antagonist or catalyst in the photoyellowing of wool. Untreated, bleached and bleached and fluorescent-whitened wool slivers were processed into fine wool powders for the purpose of even and intimate mixing with the TiO2 nanoparticles in the solid state. Pure wool and wool/TiO2 mixtures were then compressed into solid discs for a photoyellowing study under simulated sunlight and under UVB and UVC radiations. Yellowness and photo-induced chemiluminescence (PICL) measurements showed that nanocrystalline TiO2 could effectively reduce the rate of photoyellowing by inhibiting free radical generation in doped wool, and that a higher concentration of TiO2 contributed to a lower rate of photooxidation and reduced photoyellowing. Hence nanocrystalline TiO2 acts primarily as a UV absorber on wool in dry conditions and not as a photocatalyst.
History
Journal
Polymer degradation and stabilityVolume
94Issue
2Pagination
278 - 283Publisher
ElsevierLocation
Amsterdam, The NetherlandsISSN
0141-3910Language
engPublication classification
C Journal article; C1.1 Refereed article in a scholarly journalCopyright notice
2008, Crown CopyrightUsage metrics
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