Ecofriendly Dyeing of UV-Irradiated Cotton Using Extracts of Acacia nilotica Bark (Kikar) as Source of Quercetin

Abstract

Increasing awareness about safe products in textiles has developed the worldwide choice in natural colour based textiles. For the present study, barks of Acacia nilotica (Kikar) has been selected as source of natural flavone dye (querecetin). Both cotton fabrics and dye powder were exposed to UV radiations for 30, 45, 60, 90 and 120 min. Later on the dye was extracted using irradiated (RP) and un-irradiated dye powder (NRP) followed by dyeing of irradiated (RC) and un-irradiated fabric (NRC). Different dyeing variables such as temperature, time, pH, liquor concentration (M:L) and electrolyte concentration were optimized and dyeing was performed at these optimum coniditions. To improve colour strength and colour fastness properties different concentrations of mordants such as Cu (copper sulphate), Al (aluminum sulphate), Fe (iron sulphate) and tannic acid were employed. ISO standard methods were employed to determine the colour fastness to light, washing and rubbing to observe the effect of UV radiation on these fastness properties. The fabrics investigated in CIE Lab system using spectraflash showed that exposure for 90 min modifies the surface of fabric and dyeing for 50 min at 55 ºC, using 8 g/100 mL of salt using dye bath of pH 6 provides the best colour strength. It is also found that iron is the best mordant among other used that improves the colour fastness properties from moderate to good.

Eco-Friendly Dyeing of Gamma Ray Induced Cotton Using Natural Quercetin Extracted from Acacia Bark(A. nilotica)

“…Many plant which extracted dyes have antioxidant, antimicrobial properties are used in various walks of life, well known for their health curing characterization. Studies on their characterization are also going on the way (Farizadeh et al 2009;Adeel et al 2014;Adeel et al 2013).…”

Dyeability of Red Cabbage Colorant on Silk Fabric Treated With Entada Spiralis Extracts

“…Saxena [7] also added that not only natural dyes are biodegradable, the residual vegetal matter after the extraction process could easily be composed or used as fertilizers. Besides the conventional boiling water extraction, natural dyes have been extracted using alternative methods such as using gamma, ultraviolet (UV), microwave and ultrasonic machines that may be able to save energy with low-temperature processing [8,9]. Researchers have also found that certain natural dyes have unique properties such as antimicrobial [10,11,12], insect repellent [13], deodorizing effects [14], and UV-protection [15,16].…”

Ultrasonic assisted sustainable dyeing of mordanted silk fabric using arjun (Terminalia arjuna) bark extracts

“…Although the conventional extraction methods are eco‐friendly, however, these methods are time consuming labor intensive and not cost effective . The utilization of new techniques such as ultraviolet , microwave , ultrasonic , plasma , and gamma radiations have given a promising effect in natural dyeing process. Of these tools, ultrasonic radiation is taking as a convenient and energy saving method .…”