Extraction of natural dye from lotus leaves and its dyeing on modified cotton textiles
In order to investigate the dyeing performance of natural dyes from lotus leaves on cotton textiles,a cationic modifica-tion agent containing quaternary ammonium group was used to modify the cotton textile,and the optimal modification process was determined through experiments.Dyeing of the modified cotton textile using natural dyes from lotus leaves was carried out,and an optimized dyeing process was obtained based on single-factor experiments.The results show that the best modification process of cotton fabric is 6 g/L,the modification temperature is 70 ℃,the modification time is 30 min,the modification pH value is 9.The optimum dyeing process is dyeing temperature 60 ℃,dyeing time 60 min and pH value is 7.Lotus leaf-dyed modified cotton textile has a colorfastness comparable to that of untreated coal-dyed cotton textile,and it shows good wear resistance.
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