Online ISSN: 2515-8260

Keywords : reactive dyes

Synthesis of Novel anti UV- Reactive Dyes and their applications on textile fabric

Saadia Abd Elmegied; Magda M. Kamel; Badria M. Youssef; Safia A. Mahmoud

European Journal of Molecular & Clinical Medicine, 2021, Volume 8, Issue 2, Pages 2070-2088

New anti UV- reactive dyes (1-4) were synthesized from its structure was confirmed by 1HNMR and IR spectroscopy and their dyeing behavior and ultraviolet (UV) protection on cotton and wool fabrics were investigated. From the study, we can see that the exhaustion value reached over 85%, the T (UVA) and T (UVB) were 3.3% and 3.4%, respectively. The fabric dyed with anti UV- reactive dyes had very good ultraviolet radiation protection. The effects of varying dyeing conditions were investigated. Fabrics dyed with anti-UV dyes were tested for color strength (K/S), rate of fading (ΔE) values. The dyed fabrics also showed very good light fastness and good to excellent washing, rubbing, and perspiration fastness. In this paper our work aiming to reduce the undesirable photodegradation effects of UVR on dyed fabrics by applying these new anti UV- reactive dyes.

Antibacterial Finishing and Dyeing Affinity Enhancement of cellulose-based fabrics via pre-treatment by chitosan nanoparticles treatment

Fatma A. Mohamed; Maysa M. Reda

European Journal of Molecular & Clinical Medicine, 2020, Volume 7, Issue 10, Pages 2378-2392

Chitosan nanoparticles were prepared as green antibacterial finishing material and enhance antimicrobial activity of cellulose-based fabrics such as cotton and viscose. Two new bifunctional dye Bis (monochlorotriazine) (MCT) and hetero bifunctional (SES/MCT) reactive dyes have been prepared in previous work. Dimedone moiety (5,5-Dimethylcyclohexane-1,3-dione) and applied in cellulose-based fabrics with various chitosan nanoparticles concentrations imparting them antimicrobial activity. In this work the effect of chitosan nanoparticles on dye ability of cellulose-based fabrics were studied from evaluation of the colour strength expressed in K/S values of the dyed fabrics at different concentration of chitosan nanoparticles and the two synthesized used dyes. Results showed that chitosan nanoparticles treated cellulose-based fabrics have higher affinity towards dyeing than untreated cellulose-based fabrics. Also, the antimicrobial properties of the treated fabrics were higher than that of untreated fabrics and give higher exhaustion without using any salts and alkalinity. So, chitosan nanoparticles exhibit cellulose based fabrics high antimicrobial and having dyeing affinity than untreated one. Also, treated dyed fabrics showed very good to excellent fastness properties.