Yu Y.,Jiangxi Normal University |
Yu Y.,Key Laboratory of Chemical Biology of Jiangxi Province
Asian Journal of Chemistry | Year: 2014
New series of slightly crosslinked and reactive polycationic dye-fixatives for cotton fabric were synthesized by copolymerization of 3-chloro-2-hydroxypropyltriallyl-ammonium chloride (CHTAAC) and dimethyldiallylammonium chloride. The structures of obtained dye-fixatives could be controlled by varying molar ratios of raw-materials of CHTAAC to DMDAAC during polymerization and their molecular weights were possibly controlled by adjusting different polymerization conditions. The results showed, under the same conditions that the polymerization temperatures were kept at 60 °C for 6 h and then heated to 70 °C for 2 h, when the initial monomer concentrations (w/w) were increased from 40 to 52.5 % and the initiator amount were gradually decreased from 9 to 5 %, a series of slightly crosslinked and reactive polycationic dye-fixatives with 1-5 % molar contents of triallylmethylammonium chloride (TAMAC) units in main chains and controlled intrinsic viscosities of 0.16-0.75 dL/g were successfully synthesized, which were as designed and could be expected as novel useful dye-fixatives for cotton fabric.
Yu Y.-K.,Jiangxi Normal University |
Yu Y.-K.,Key Laboratory of Chemical Biology of Jiangxi Province |
Zhang Y.-J.,Nanjing University of Science and Technology
Journal of Donghua University (English Edition) | Year: 2015
The roles of slightly crosslinked poly (dimethyldiallylammonium chloride)s (PDMDAACs) in fixing anionic dyes on cotton fabric were verified more precisely by optical analysis technologies, to achieve the new theoretical guides for the widely applications. Firstly, one method of optical CIELAB color difference analysis was designed to exactly measure the values of dye-fixing performances, so that the suitable molecular weights and structures of the slightly crosslinked PDMDAACs could be precisely confirmed to play a role in the development of their dye-fixing performances. Secondly, the FT-IR absorption shift of the dye on dyed cotton sample fixed by slightly crosslinked PDMDAACs was nearly in agreement with that of forming water-insoluble color lakes, indicating that the expected color lakes could be formed on dyed cotton fabric, and would play a role in further development of the fastness of dyes on cotton fabric. Thirdly, the FT-IR spectra of fixed undyed cotton samples and that of fixed dyed cotton samples both showed the absorptions of slightly crosslinked PDMDAACs, further revealing that the slightly crosslinked PDMDAACs could be penetrated into cotton fabric and be convenient to interact with dyes when fixing. However, those absorptions of the slightly crosslinked PDMDAACs fixed on cotton samples would be absent after being adequately washed to a constant weight, suggesting that the fixing interactions of the slightly crosslinked PDMDAAC and cotton fabric were very weak. Copyright © 2015 by Editorial Board of Journal of Donghua University, Shanghai China.