Abstract
A new dyeing process of sol–gel silica doped with direct dyes is investigated for improving color strength (K/S value) and dyeing fastness. Cotton fabrics are dyed in this direct dye silica solution. The results indicate that the K/S value of C.I. Direct Blue 86 and C.I. Direct Red 23 are enhanced by 12.8% and 16.8%, respectively. For C.I. Direct Blue 86, the washing staining fastness is improved by half a grade, and the rubbing fastness and the washing change fastness are enhanced by one grade, respectively. Compared to the fabric fixed with fixing reagent MMF-1, the K/S value is improved by about 23.7% and the wet rubbing fastness and washing change fastness are enhanced by half a grade. The formation of uniform continuous layers on the fiber surface dyed with direct dye silica solution is revealed by video microscope, and the calculated sol–gel weight gain on the fabric is 4.6%.
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Acknowledgements
The authors thank the National Natural Science Foundation of China, approval No. 20674031 and the Program for Innovative Research Team of Jiangnan University for funding this research work.
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Yin, Y., Wang, C. & Wang, C. An evaluation of the dyeing behavior of sol–gel silica doped with direct dyes. J Sol-Gel Sci Technol 48, 308–314 (2008). https://doi.org/10.1007/s10971-008-1819-8
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DOI: https://doi.org/10.1007/s10971-008-1819-8