Abstract
This analysis intends to unveil the effect of metallic mordants on colorimetric properties of ecologically dyed cotton fabric using banana floral stem sap (BFS).Natural dye retrieved from banana floral stem by roller squeezer machine. Pre-mordanting action was performed by potassium alum, iron (II) sulphate, copper (II) sulphate and tin (II) chloride. Pre-mordanted specimens were dyed at 100℃ for 60 minutes. Dye fiber binding actions was determined by FTIR-ATR spectra. Effect of metallic mordants were calculated using CIE L*a*b* color space in terms of colorimetric properties viz. color coordinates value i.e. lightness (L*), redness (a*), yellowness (b*), color saturation (C*) and hue angle (h0); color strength (K/S) value; degree of color levelness and brightness index (BI). Though iron (II) sulphate treated samples exhibited height color saturation but uneven physiognomy was observed. Among them best colorimetric appearance yielded in case of alum. This reports forecast a sustainable pathway for effective utilization of agricultural waste i.e. banana floral stem sap for coloration of cotton fabric.
Highlights
The application of natural dyes for textile dyeing purposes declined to a great extent after the innovation of synthetic dyes in 1856 [1]
Samples were washed at room temperature and air dried in flat dryer machine (MESDAN, Italy). soaping was performed for removing unfixed dye from the fabric surface by 0.5 g/L ISO standard soap at 80 °C for 10 minutes
From measured colorimetric of value it is concluded that limited shade was overcome by treating with metallic mordants
Summary
The application of natural dyes for textile dyeing purposes declined to a great extent after the innovation of synthetic dyes in 1856 [1]. Discharged effluents from textile industries are severely endangering the human health and aquatic environment [2] In this regards, the use of non-allergic, non-carcinogenic, non-toxic, very brilliant, rare color idea and eco-friendly natural dyes on textiles is a re-emerged soaring interest around the globe. Natural dyes are safe and biodegradable in nature which can be obtained from different sources such as plants, insects/animals, microbes and minerals, renewable and sustainable bio resource products [4] They have many excellent functional properties such as mosquito repellency [6], antimicrobial and antiviral properties [3], flame retardency [7], UV protection properties [8], aroma properties [9], wound healing and anti-inflammatory properties [10], moisturizing and refreshing effects [11]
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