Abstract: Abstract. Surface modified wool fabrics were obtained by chitosan sulfamic acid/TiO2 sol treatment. FT-IR, SEM, thermogravimetric analysis (TGA) was used to characterize the structure of modified wool fabrics. It indicates bond is formed in the modified wool through IR spectra. That treated wool fibers had more smooth surface appearance showed the presence of chitosan sulfamic acid /TiO2 film deposited onto surface of wool fibers. TGA demonstrates that the modified wool exhibits better thermal stability. Based on single factor experiment, the influence of dyeing conditions on the color strength (K/S value) of modified wool fabrics with weak acid red B dyeing were studied and compared to untreated wool. As a result, it can be concluded that the weak acid red B dyeing properties of chitosan-sulfamic acid /TiO2 modified wool were better than untreated wool at 6% dye concentration,pH5.2,70℃and dyeing time 1h. Kinetic study showed the experimental data were fitted with second-order kinetics. Further, low temperature dyeing of wool fabrics with chitosan-sulfamic acid tetrabutyl titanate (TBT) is safe, so the results obtained are quite promising as a basis for possible future industrial application.

Key words: chitosan, wool, sulfamic acid, tetrabutyl titanate, dyeing