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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.