Abstract
The aim of this project work is to study the application of Bixa orellana seed for dyeing of cotton knitted fabric. To satisfy the future demand for an eco-friendly as well as sustainable dyeing of cotton fabric numeric exploration had been performed in this work. Natural dye was extracted by normal water extraction method with caustic soda from raw seed of Bixa orellana. In this experiment commercially scoured-bleached 100% cotton knitted single jersey structure fabric with an areal density of 140 grams per square meter is used. Pre-mordanting action of cotton fabric samples were carried out using various metallic salts. Samples were dyed using by Glauber Salt + hot wash with Standard Soap, without Glauber Salt + hot wash, Glauber Salt + without hot wash and without Glauber Salt + without hot wash. Color strength of the dyed samples for different dyeing condition was assessed by means of K/S value. To intensify the color strength various mordanting agents were used. Effect of mordanting agents had evaluated by means of K/S value. Best color strength was yield for the samples dyed with Bixa orellana which were mordanted with CuSO4. Impact of electrolyte on color strength had also investigated by means of K/S value. Color fastness of the selected dyed samples to water, washing, perspiration and rubbing were evaluated. Impact of mordanting agents, hot wash and electrolyte were intensively evaluated. In all cases mordanted samples with CuSO4 exhibit best result. This result adumbrates developing a sustainable technology for a cabalistic utilization of Bixa orellana seed for coloration of cotton knitted fabric. The exquisite assessment of all tested properties of colored samples evolves this technology can be commercially implemented by considering few limitations.
Highlights
Nowadays being fashionable means to be worried about environmental issues and sustainable development [1]
Figure illustrates that samples finished with hot wash when dyed without salt, overall K/S values increase for Iron(II) Sulphate, Iron(III) Chloride but for Copper(II) Sulphate K/S value decreases at 470nm and increases at 360nm and for Alum as well as K/S value same at 360nm and decreases at 470nm
Color strength of the dyed samples for different dyeing condition was assessed by means of K/S value
Summary
Nowadays being fashionable means to be worried about environmental issues and sustainable development [1]. Dyes which extracted from natural materials such as plant leaves, roots, bark, insect secretions, and minerals for sustainable and eco-friendly textile dyeing are become lessening the exercise of synthetic dyes in the global industrial markets. The awareness of environment as well as increasing disputes about the risks of synthetic dyes resulted in growing interest in natural resources, environmentally friendly products and new strategies. Green Chemistry is the design, development, and implementation of chemical products and processes to reduce or eliminate the use and generation of substances hazardous to human health and the environment [2]. Colored cotton is seen as a substitute raw material ensuring ornamentation of textiles without use of highly toxic dyes and chemicals and in this direction annatto seeds (Bixa orellana) were selected as a natural dye source for cotton knitted fabric.
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