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Functional Modification with TiO2 Nanoparticles and Simultaneously Dyeing of Wool Fibers in a One-Pot Hydrothermal Process
- Zhang, Hui, Yan, Hongyan, Mao, Ningtao
- Industrial & Engineering Chemistry Research 2014 v.53 no.5 pp. 2030-2041
- acetic acid, color, engineering, methylene blue, nanocrystals, nanoparticles, photocatalysis, tensile strength, thermal stability, titanium dioxide, ultraviolet radiation, wool
- Wool fibers are treated with titanate tetrabutyl in the presence of C. I. Reactive Blue 69 dye in a one-pot process under hydrothermal conditions. The fiber structure and as-prepared particles are characterized. The properties of percentage of exhaustion, K/S value, color fastness to light, tension, photocatalytic activity, and diffuse reflectance spectrum are investigated. The experimental results indicate that after treatment the wool fiber surfaces are evenly immobilized with a thin layer of anatase phase TiO₂ nanoparticles. The TiO₂ nanocrystals are grafted onto wool fibers via the C–Ti⁴⁺, S–Ti⁴⁺(Ti²⁺), and N–Ti⁴⁺ bonds. The thermal stability of wool fibers changes a little. The capability of wool fibers to protect against ultraviolet radiation is improved. The tensile properties decrease. The photocatalytic activity to decolorize methylene blue dye is endowed. A high degree of percentage of exhaustion and high K/S value are obtained by adding a certain amount of acetic acid in the precursor solution.