Application of Response Surface Methodology for the Extraction of Dye from Henna Leaves

摘要

Due to toxic effect of synthetic dyes, there air growing concerns of alternative dyes which should be non toxic and environmental friendly. The dyes from natural sources can substitute the synthetic dyes. In present study, the extraction of natural dye from henna leave was evaluated. The temperature, extraction time and mass to liquor ratio (M:L) were considered for optimization. The extracted dye was applied to cotton fiber and measured the relative colour strength of extracts. The relationships between variables were established by optimal design from statistics using response surface technology to hit the target. The variables such as temperature, extraction time and mass to liquor ratio levels were 80,90, 100 °C，20,40,60 min and 1:10, 1:20 and 1: 30, respectively. The relative colour strength showed that 89 °C, 44 min and 1:23, respectively were the best levels of variable for the extraction of maximum dye form henna leaves.