Determination of the dye-fixing mechanism of poly(dimethyldiallylammonium chloride)s on cotton fabric

Abstract

The dye‐fixing mechanism on cotton fabric of poly(dimethyldiallylammonium chloride)s (PDMDAACs) was determined in detail by using several chemical and physical techniques, in order to achieve clear new theoretical guidelines for the wide application of these dyefixatives to different dyes. Findings from previous work showed that the dye‐fixing performance of PDMDAACs can vary with their molecular weights. Analysis by GPC further showed that the polydispersity indexes of the PDMDAACs were 1.22–1.92, which were narrow distributions, but their molecular chain lengths were very different, as indicated by their number‐average molecular weights of 0.69 × 104−1.09 × 105 g/mol and weight‐average molecular weights of 1.33 × 104−1.45 × 105 g/mol. These results indicated that the differences in dye‐fixing performance could be mainly caused by the different molecular chain lengths. Analysis by FTIR of the dyes on dyed cotton samples fixed by PDMDAACs showed absorption shifts similar to those of water‐insoluble color lakes formed from the cationic groups of PDMDAACs and an anionic dye. This finding indicates that the expected color lakes could be formed on dyed cotton fabric when fixing, and that they play a role in the development of the fastness of dyes. However, the interaction between the PDMDAACs and cotton fabric during fixing was confirmed to be very weak. J. VINYL ADDIT. TECHNOL., 19:219‐224, 2013. © 2013 Society of Plastics Engineers

Colorfastness Properties of Persimmon Dye on Cotton and Wool Fabrics

“…After undergoing laundering testing, the peak at 1,390.84 cm −1 ’s intensity returned to 0.0401 compared to its original 0.0457 shown in Figure 5b. The impermanent intensity decrease at 1,390.84 cm −1 suggests a weak interaction (Yu & Zhang, 2013). It is important to note that Kourkoumelis, El-Gaoudy, Varella, and Kovala-Demertzi (2012) suggested strong bonds can form when a dye and a fabric show similar peaks on FTIR spectra.…”

Application of Rare Earth Marking on Anti-Counterfeiting Waterless/Less-Water Dyeing Technology

“…The dye absorption at 1319 cm −1 was shifted to 1405 cm −1 , which proved that the rare earth ion had a coordination effect with the –OH in the ortho position of azo group. 29 Furthermore, the dye absorption at 1612 cm −1 was shifted to 1589 cm −1 , which explained that rare earth ions had an effect on the azo group on the dye molecular structure.…”

Synthesis and application of a cationic waterborne polyurethane fixative using quaternary ammonium diol as a chain extender

“…It is well known that WPU is environmentally friendly and has excellent mechanical properties, abrasion resistance, and good lm-forming properties due to its unique structure. 7 The cationic group of WPU can be combined with the anion group of dye molecule to form a water-insoluble lake, 8 and polyurethane molecules can enclose the dye molecules among the bers because of their excellent lm-forming ability. Furthermore, if reactive group (such as blocked -NCO group [9][10][11] or epoxy group 9,12 ) was incorporated into WPU, the polyurethane molecules can form covalent bonds with fabrics or dyes during the high-temperature baking process.…”