摘要
Abstract
The extraction of lotus shell pigment and its dyeing conditions and feasibility were explored. The effects of extraction power, extraction temperature, extraction time, ratio of material to liquid and ethanol concentration on extraction efficiency were analyzed by single factor experiment with two methods of ultrasonic and extraction. After comparison, it was found that ultrasonic extraction method was better, which had the advantages of low temperature, low ethanol concentration, short time. So in the following dyeing steps, the ultrasonic extraction method was selected. Dyeing part explores the effects of dyeing temperature, dyeing time and dyeing power, bath ratio effect on silk dyeing, and the three methods of pre-mordant, mordant and post mordant dyeing were compared. The colour fastness to washing and the fastness to rubbing of fabrics were tested. The results showed that the optimal process of lotus shell pigment extraction by ultrasonic was as follows: temperature 37 ℃, time 35 min, solid-liquid ratio 1:20, ethanol concentration 50％, power 400 W. The optimal process of silk direct dyed by lotus shell pigment extract was as follows: temperature 60 ℃, time 45 min, ratio of solid to liquid 1:20, power 350 W. The mordant dyeing could improve the dyeing rate of silk. The lotus shell pigment dyeing of silk had better color fastness.关键词
莲蓬壳/天然染料/提取/真丝绸/染色Key words
lotus shell/natural dyes/extraction/silk/dyeing分类
轻工纺织
