Naslov
The Influence of Iron Ions on Optical Brighteners and Their Application to Cotton Fabrics

Autori
Dekanić, Tihana ; Pušić, Tanja ; Soljačić, Ivo ; Vojnović, Branka ; Volmajer Valh, Julija

Izvornik
Materials (1996-1944) 14 (2021), 17; 4995, 14

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
optical brighteners ; solutions ; iron ions ; absorption ; fluorescence ; cotton fabric ; whiteness degree ; Ultraviolet Protection Factor (UPF)

Sažetak
The influence of iron ions at concentrations of 0.2, 0.5, and 1.0 g/L on optical brighteners of the groups stilbene and biphenyl in solution and on cotton fabric was investigated. Both groups of optical brighteners are intended for detergent formulations. The influence of iron ions was studied by absorption and fluorescence spectra in solution and by whiteness degree, identifying color differences using CIEL*a*b* coordinates and Ultraviolet Protection Factor (UPF) of cotton fabrics. The obtained results in solutions and cotton fabrics showed different behavior of optical brighteners stilbene and biphenyl in the presence of iron. Stilbene compounds with metal ions produced new species capable of absorbing in the UV-B region of the spectrum. A biphenyl compound in combination with iron had no effect on the absorption properties. Both optical brighteners were influenced by iron ions in the sense of fluorescence quenching. The influence of iron ions in single- and two-bath treatments of cotton fabrics after one cycle on whiteness degree and UPF was negligible.

Izvorni jezik
Engleski

Znanstvena područja
Kemijsko inženjerstvo, Tekstilna tehnologija

Napomena
Glavni autori: Dekanić Tihana i Vojnović Branka

POVEZANOST RADA