Simultaneous dyeing and antibacterial finishing for cotton cellulose using a new reactive dye (original) (raw)
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Performance of pretreated antimicrobial agent (AEM-5707) on cotton fabric dyed with reactive dye
An integrated chemical finishing process with balance of dyeability, fastness and antimicrobial characteristics is the need of modern textile industry. In the present work, antimicrobial agent AEM-5705 was applied on cotton fabric in different concentrations and the treated fabric was dyed with reactive dye (C.I. Red 195) in different shades in high temperature (HT) dyeing. The colour performance parameters like L, a, b, C, h and colour strength were determined and found to be improved with treatment of AEM-5705 on cotton fabric. However, bioassay of the four different strains of bacteria showed a weaker antimicrobial activity on cotton fabric pretreated with AEM-5707 than untreated.
ECO-FRIENDLY DYEING AND ANTIBACTERIAL TREATMENT OF COTTON
Berberine, a natural cationic dye with excellent antibacterial activity, was extracted from the roots of Berberis vulgaris and applied on cotton fabric. Naturally, there is no affinity of cationic dyes for cotton fiber. To improve the dyeability of cotton fiber, plasma treatment and acrylic acid grafting, using plasma technology for pretreatment, were employed. The grafting of acrylic acid was confirmed using ATR-FTIR. The effect of pretreatments on the dyeability of cotton was evaluated. The antibacterial activity of the dyed samples was evaluated according to AATCC test method 100-2004. The samples dyed after acrylic acid grafting showed the highest antibacterial activity.
Polish Journal of Environmental Studies, 2017
New types of dyestuff moieties are being introduced to get the ease in imparting color to various substrates and sorting out the ways to improve the quality of dyed fabric using environmentally friendly techniques. To contribute to this research effort, the present study was carried for dyeing cellulosic fabric using novel bi-functional reactive dye. The synthesized dye contained sulphatovinylsulfone and monochlorotriazine functionality. The important influencing parameters for the exhaust method, e.g., dyeing temperature, concentration of salt, and alkali were optimized and their interaction was studied using central composite design. The results indicated that 61.5ºC was found to be suitable for the maximum exhaustion and fixation of the dye on cotton fabric. The optimum concentration of salt (30.01 g/L) and alkali (22.32 g/L) for dye experimentally resulted in 84.98 (±3)% of exhaustion and 79.00 (±3)% fixation on cellulose fabric. Fastness properties were good-to-excellent for the novel reactive dye applied on cotton fabric. A comparison of the results with the commercial reactive dye showed that attained results were within a practical range suitable for commercial dyeing.
Dyeing of cotton using reactive dyes without Salt
In this study 3-chloro-2-hydroxypropyl trimethyl ammonium chloride was used as a cationic agent to cationize cotton fabric by a pad-batch process. The cationized cotton samples were dyed with different reactive dyes containing various reactive groups. The dyeability of the cationized cotton samples with reactive dyes without salt was significantly improved due to an increase in the ionic attraction between the dye and cationized cotton. The results showed that the wash and dry rubbing fastness of the cationized cotton dyed with different reactive dyes are similar to those of the untreated cotton. However, the light fastness of some of the cationized fabric samples was improved.
Dyeing and Antibacterial Properties of Some Newly Synthesized Sulfonamide Reactive Dyes
Macromolecular Symposia, 2019
Dyeing performance and antibacterial properties of four novels synthesized reactive dyes (D 1-4) were studied in this paper. The dyeing process was achieved under a variety of conditions, embracing concentrations of the dye (1-9%), soda ash (0-25 g L À1), Glauber salt (0-100 g L À1), dyeing temperature (40-90 C), dyeing time (30-90 min), and material to dye liquor ratio (1:05-1:80). The maximum color strength (expressed as K/S) values of the dyed cotton fabrics obtained at 3% (based on fabric weight, wof) dye concentration, 20 g L À1 sodium carbonate, 100 g L À1 Glauber's salt, temperature 80 C (for D 1 , D 2 & D 4), and 60 C (for D 3), fixation time 60 min, and material-to-liquor ratio (M/L) 1:10. The fastness properties towards washing, perspiration, rubbing, and light were evaluated. All dyed fabrics showed antibacterial potency against both gram positive (S. aureus) and gram negative (E. coli) bacteria.
Simultaneous dyeing and anti-bacterial finishing of textile by sol-gel technique
Using the sol–gel process, functional silica coatings can be deposited on textile materials and can lead to new textile properties and applications. In the present study combined dyeing and antibacterial finish was applied on same fabrics. Cotton and polyester/cotton blend were dyed with cheap basic dyes using sol-gel method by adding glycidoxypropyltrimethoxysilane as cross-linking agent. Cetyltriammonium bromide was incorporated to give antibacterial textiles in these coatings. A large reduction in the bacterial count of StaphylococcusAureus was observed.Thus simultaneous dyeing with cheap basic dyes and anti-bacterial finishing is possible by this technique. In addition to antibacterial textiles we also get softening of fabric. However the technique adversely affects the mechanical properties of the fabric.
A new approach for natural dyeing and functional finishing of cotton cellulose
Carbohydrate Polymers, 2010
A new approach for upgrading the dyeing properties of cotton knits with natural dyes as well as to enhance both the UV-protection and antimicrobial functions of the obtained dyeings was investigated. Factors affecting the dyeing and multifunctional properties of the treated substrates such as fabric structure, type and concentration of mordant, kind and percent of natural dye extract as well as dyeing regime were studied. In situ deposition of the mordant as a metal oxide onto and/or within the fabric structure followed by dyeing results in a dramatic improvement in the color strength as well as the fastness properties, in addition to an outstanding enhancement in both the UV-protection, against the harmful UV-radiation and the antibacterial activity against the hazardous G+ve and G−ve bacteria. The extent of improvement in the aforementioned properties follows the descending order: pre-mordanting followed by dyeing > dyeing only > none, and is determined by type and content of metal, physical state/chemical structure as well as extent of dye interaction and fixation, along with the fabric construction. The UV-protection properties as well as the antibacterial activities of the obtained dyeings are maintained even after 20 washing cycles.