The use of natural Areca catechu dyes for silk and nylon and its halochromic effect

In this study, we have investigated the use of betel nut (Areca catechu) extract solution as a natural dye for the use of dyeing for silk and nylon. Chemical structure of betel nut extracted solution was confirmed by using FTIR and H-1 NMR spectroscopy and thermal properties also measured for determining the proper dyeing temperature. In order to optimise the colouration properties, variable dyeing parameters (temp, pH and mordant type) was studied. The halochromic effect of synthesised natural dye was analysed by using UV?Vis spectroscopy. Additionally dye build-up, colour fastness properties of both fabrics were compared.