Chemical-Free Scouring and Bleaching of Cotton Knit Fabric for Optimum Dyeing Performance

Abstract

The current work endeavored to avoid chemicals during scouring and bleaching of cotton knit fabric in order to introduce a green method. Single jersey single lacoste knit fabrics were treated in water at 105 °C, 120 °C, and 130 °C for 20, 40, and 60 min at reduced process stage. Fourier transform infrared data revealed the weakening and shifting of typical bands of wax and pectin-based cotton impurities in the region of 1,740–1,200 cm−1 for the pretreated samples at 130 °C for 20 min. Color difference (Color Measurement Committee ΔE) was found within the acceptable range for 1.5% and 1% dyed samples when treated at 105 °C for 20 min, while 0.5% dyed samples required 130 °C for 20 min to achieve the desired range. The ratings for color fastness to washing, perspiration, and rubbing were 4–5 for all the chemical-free pretreated samples. The proposed process yielded better strength and dimensional stability compared to the conventionally pretreated samples.

Ecofriendly pretreatment of cotton knit fabrics by ultrasonic irradiation and reusing bath chemicals

“…It is evident that, sonication technique for dyeing is compatible for shade matching. The CMC values for 0.5, 1.5, and 2.5% shades were 0.89, 0.64, and 0.77, respectively, showing that 1.5 and 2.5% shades passed the normal range, but the 0.5% shade passed the commercial range (Hannan et al 2019). The picture of the sample dyed with reactive dyes with light shade are given in Fig.…”

“…Textile wet processing is ranked second among freshwater consumers and polluters because it has a signi cant environmental effect, making it one of the most environmentally harmful sectors (Ibrahim et al 2019). To ensure the successful implementation and acceptance of cleaner production techniques and practices in the textile industry, production, user, and disposal ecologies should be considered (Hannan et al 2018a(Hannan et al , 2019. Combining two or more wet processes in a single step, for example, and reusing chemicals using alternative ways can save water, energy, and chemical usage, as well as reduce e uent load and productivity (Bhuiyan et al…”

Extraction, optimization and evaluation of turmeric root (Curcuma longan) dyeing conditions on cotton fabric

“…Exactly 100 ml of water was measured with measuring cylinder, 3 g of detergent (Viva plus) was weighed using weighing balance and dissolved in the 100 ml water contained in the beaker. The stitched fabric was introduced into the detergent solution and was stirred vigorously for 10 minutes, then rinsed and dried at room temperature [24] .…”

Sustainability Assessment of Cotton-Based Textile Wet Processing

“…In consequence, peroxide bleaching also worsens fabric strength [30,36,37]. Hannan, et al [41,42] investigated scouring and bleaching of cotton knit fabric using high temperature water at 120 • C without any chemical involvement and found satisfactory dyeing performance for medium and dark shades. At high temperature, water molecules break and generate some H + ions lowering pH from 7, thereby scouring and bleaching cotton by the acid hydrolysis mechanism.…”