Naslov
Utjecaj ozona na neka fizikalno-kemijska svojstva vune
(The Impact of Ozone on Some Physico-Chemical Properties of Wool)

Autori
Parac-Osterman, Đurđica ; Karaman, Boris ; Soljačić, Ivo

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Book of Papers of the International Conference & Exhibition / Trask Morel, Brenda - Philadelphia (PA) : American Association of Textile Chemists and Colorists v, 1998, 604-604

Skup
International Conference & Exibition

Mjesto i datum
Philadelphia (PA), Sjedinjene Američke Države, 22.09.1998. - 25.09.1998

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
okoliš; vuna; ozon; kisela bojila; reaktivna bojila
(environment; wWool; ozone; acid dyes; reactive dyes)

Sažetak
Environmentally harmful influences of ozone and smog are the tribute our century is paying for industrial development and a problem wich the next century will inherit. Wool, a natural protein fiber is the most chelleging textile substrate, not only because of the complexity of its morphological and chemical structure, but also because of some of its properties that are similar to those of human skin and hair. All the investigations described here were done on unbleached wool washed at 40C and 90C and dyed with azo and anhraqinone dyes at 90C. All the wool samples were treated with ozone from 50 and 450 pphm for 24 hours. The systine content in undyed wool samples was analyzed using a spectrophotometric method. The measurments showed the rise in cystine and the drop in cysteine contents in wool fibers at 50 pphm of ozone, indicating certain chemical changes in the fiber itself. Higher take-up levels of dye on untreated samples compared to the ozone-treated samples could be attributed to physico-chemical changes in the structure of the fibers. The results indicate theat the alkaline solubility of the samples dyes with reactive dyes has no direct relation to breaking strenght. The acid chosen, together with the metal complex dyes (compared to reactive dyes), has a detirmental influence on the fiber strength after ozone treatment. Differences in chemical structure of anthraqinone and azo dyes resulted in lower level of fiber damage, even when treated with ozone levels as high as 450 pphm, irregardless of the mechanism of the fiber-dye bond.

Izvorni jezik
Engleski

Znanstvena područja
Tekstilna tehnologija

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