Study On Extraction And Dyeing Properties Of Natural Pigment From

Green environmental protection has become the theme of industrial development in the world today.Therefore, the research and development of new green textiles and environmentally friendly dyes is the inevitable trend of the development of textile and dyeing industry in the future.natural dye with its excellent environmental compa tibili-ty and health care function, has increasingly become the focus of research and development of new dyes.This experiment selects the natural plant mugwort as dyes,ethanol as extracting agent,ultrasonic wave as an auxiliary means.Through the single factor experiment and response surface analysis of the experiment to study the ethanol concentration, solid-liquid ratio, ultrasonic time, ultrasonic temperature, extraction pH value and extraction times on mugwort pigment extraction effect influence.The stability and oxidation resistance of pigment extracts were deeply research.The mugwort pigment extract has obvious absorption peaks in the visible region of λ=670nm.The optimized extraction process was as follows:anhydrous ethanol as extraction agent, liquid ratio 1:15, ultrasonic temperature was 70 ℃, ultra-sonic time 41min, pH=6, extraction times was 2 times.Mugwort pigment was not stable in strong acid, alkali, light, metal ions,the stability of anti oxidant and reducing agent was slightly worse.The mugwort pigment had strong ability to eliminate DPPH· and ·OH, and can significantly inhibit the autoxidation of soybean oil.This experiment using the mugwort pigment on wool fiber and modified cotton fabric dyeing,by single factor experiment and orthogonal experiment optimize the modification process and mugwort pigment dyeing process.And we discussed the color fastness, antibacterial property and anti ultraviolet ability of dyed fabric. The results show that the dyed by mugwort of wool and modified cotton fabric has high rubbing fastness and soaping fastness,but poor fastness to sunlight.Antibacterial effect of mugwort dyes significantly,and the antibacterial property of the wool fabric after dyeing can be given. Mugwort dye has good ultraviolet absorption ability,after the mo-dified cotton fabric was dyed with Mugwort dyes,its UPF value reached 16.4, UPA、 UPB transmition rate was also significantly reduced.