Extraction of natural dyes from Cinnamomum camphora (L.) presl fruit and their application on wool fabric

Abstract

Natural dye was extracted from Cinnamomum camphora (L.) presl fruit and purified by aqueous two-phase extraction and the macro porous resin adsorption method. The extracted dye was characterized by Fourier transform infrared spectroscopy and liquid chromatography/mass spectrometry. The experimental results showed that the extraction process could be optimized by using a 1:1 mass ratio of water and ethanol as a solvent with the addition of 5 wt% Tween-80 for extracting at 50℃ for 2 h. The extracted dye was applied for the dyeing of wool fabrics, and the optimal dyeing conditions were found to be at 100℃ for 60 min by using 2.5 wt% of antimony potassium tartrate as a mordant. The kinetic study showed that the adsorption of the extracted dyes toward wool fabrics was fitted with the pseudo-second-order model. The dyed wool fabric exhibited excellent color fastness to washing, rubbing and light.