CI Reactive Black 5 dye as a visible crosslinker to improve physical properties of lyocell fabrics

Abstract

Bi-functional reactive dyes have been used for reducing the fibrillation of lyocell fibres. The sole influence of CI Reactive Black 5 dye on the fibrillation tendency of lyocell single jersey knitted fabrics was investigated by dyeing with different concentrations (35 g/L for medium shade and 70 g/L for dark shade), dyeing without dyestuff and by decolouration process after each dyeing. The fibrillation tendency of lyocell fibres was accessed by means of fibre wet abrasion resistance and fibrillation number. Nitrogen content was used as indication of the amount of reactive dye in fabrics during dyeing and decolouration processes. The correlation between fibre fibrillation tendency and colour values of fabrics was found. Due to the fibrillation reduction, pilling formation in dyed lyocell fabrics was improved. As colour values can estimate the dye fixation and reduction in fabrics, reactive dye can be used as a visible marker for crosslinking effect on lyocell fabrics.

Sorption behavior of reactive dyed labelled fibroin on fibrous substrates

“…Similar behavior has already been observed in cellulose fiber chemistry where modification of fiber fibrillation was attributed to the crosslinking of cellulose chains by RB5 …”

“…Similar behavior has already been observed in cellulose fiber chemistry where modification of fiber fibrillation was attributed to the crosslinking of cellulose chains by RB5. 28 In the case of RB19, only one covalent bond is formed between the dye and a protein chain, thus dissolution of fibroin in CWE is not prevented by the formation of an interlinked molecular network. The presence of dyestuff molecules, which bear charged groups e.g., sulfonate groups will modify the solubility behavior of protein chains, however due to absence of crosslinks, the dissolution in CWE is not prohibited.…”

Low-temperature and efficient crosslinking of lyocell knitted fabric with an eco-friendly diepoxy agent for fibrillation resistance

“…9(d), the Martindale pilling grade of EH-Lyocell was higher than Lyocell under all friction times except 3000 frictions. This was attributed to the cross-linking reaction between crosslinker EH and the hydroxyl group on cellulose, forming a three-dimensional network structure, which enhanced the transverse force of lyocell bers and the wear resistance of the fabrics (Bui et al 2009). With the increase of the number of frictions, the pilling grade of the lyocell fabrics gradually decreased until 1000 times, and then the grade rose.…”

“…Crosslinking is an effective treatment method to reduce the tendency of brillation by esteri cation or etheri cation reactions between ber macromolecular chains. Many researchers found that some ployfunctional reactive dyes can reduce the brillation of lyocell fabrics (Bates et al 2008;Bui et al 2009).…”

Statistical investigation of the cotton dyeing kinetics of CI Reactive Black 5 dye

“…It has two azo chromophores and two vinylsulfone reactive groups in its molecular structure [1]. The scientific literature includes RB5 dye studies for different purposes [2][3][4][5]. Kyzas et al [6] investigated the adsorption of RB5 on magnetic graphene oxide.…”