Dyeing Properties of Cotton Fabrics using Extracted Dyes from Ethiopian and Congolese Coffee

Abstract

A natural dye on textiles has gain significant importance for the reason that it was ecofriendly non-toxic, and increased environmental cognizance in order to avoid some dangerous synthetic dyes. In this study, the natural coloring substances such as Ethiopian and Congolese coffee (Coffee Arabica L) were useful to cotton fabrics, dyeing to both functionalize in addition to color the fabrics. The dyeing solution was prepared by extracting coffee grounds collected from Wad Medani MarketSudan, they were extracted in hot water at 90 °C (raw coffee, medium-roasted and dark-roasted coffee). Also, the caffeine is separated and dyed with the coffee residues, the result was similar to the samples that were dyed with coffee. The coffee extract was used to Cotton fabrics using an infrared (IR) dyeing machine by conventional method at pH 8 for 90 min. The dyeing and surface properties of Cotton fabrics were investigated by Spectrophotometry and were characterized by Attenuated Total Reflectance Fourier Transform Infrared Spectroscopy (ATR-FTIR) to understand the performance of these natural dyes, respectively. The colors of the dyed Cotton fabrics obtained were found to be significantly light green for raw coffee, brown in appearance for medium-roasted and dark-roasted coffee, and their color fastness to washing and rubbing of dyed fabric with natural colorant extracts were compared. The results of fastness were found to be in the range of good to excellent. The dyeing properties of the color was found to be significantly reliable on the concentration of extracts and the degree of roasting of coffee.