Extraction of mulberry leaf natural dyes and silk dyeing method
A technology of natural dyes and dyeing methods, which is applied in the field of comprehensive utilization of mulberry leaves and natural dyes for silk fabrics. It can solve the problems of color difference in dyed silk, increase the processing process, increase costs, etc., achieve good dyeing concentration and tone, overcome troubles, and prevent color difference. Effect
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Embodiment 1
[0014] Get fresh mulberry leaf 1kg, chop, use 10kg concentration to be the NaOH solution of 5mol / L to boil the mulberry leaf for 30min, filter the mulberry leaf residue after filtering and then use 5kg concentration to be the NaOH solution of 5mol / L to boil for 30min, filter, merge the two. The second filtrate was added dropwise with a mass ratio of 95% H while stirring. 2 SO 4 Until the precipitation occurs, stand still for 4h, pour off the supernatant, and collect the precipitation to obtain the natural mulberry leaf dye;
[0015] Take 1g of mulberry leaf natural dye, use Na with a concentration of 1mol / L 2 CO 3 50mL of the solution was dissolved, then diluted with water to 500mL, and the silk 1m after conventional pretreatment was 2 Put it into the dyeing solution for dyeing, the dyeing temperature is 80°C, and the time is 50min. After dyeing, the silk fabric is taken out and fully washed and dried in the shade.
[0016] After determination, the L value of dyed silk fab...
Embodiment 2
[0018] Get fresh mulberry leaf 1kg, chop, use 20kg concentration to be the NaOH solution of 5mol / L to boil the mulberry leaf for 30min, filter the mulberry leaf residue after filtration and then use 5kg concentration to be the NaOH solution of 5mol / L to boil for 30min, filter, merge the two. The second filtrate was added dropwise with a mass ratio of 95% H while stirring. 2 SO 4 Until the precipitation occurs, stand still for 4h, pour off the supernatant, and collect the precipitation to obtain the natural mulberry leaf dye;
[0019] Take 1g of mulberry leaf natural dye, use Na with a concentration of 1mol / L 2 CO 3 50mL of the solution was dissolved, then diluted with water to 500mL, and the silk 1m after conventional pretreatment was 2 Put it into the dyeing solution for dyeing, the dyeing temperature is 80°C, and the time is 50min. After dyeing, the silk fabric is taken out and fully washed and dried in the shade.
[0020] After determination, the L value of dyed silk fa...
Embodiment 3
[0022] Get 1kg of fresh mulberry leaves, chop, use 30kg of Na of 6mol / L concentration 2 CO3 solution boils mulberry leaves for 30min, and the filtered mulberry leaf residues are then used with 5kg of Na with a concentration of 6mol / L. 2 The CO3 solution was boiled for 30min, filtered, and the two filtrates were combined, and H with a concentration of 95% by mass was added dropwise while stirring. 2 SO 4 Until the precipitation occurs, stand still for 4h, pour off the supernatant, and collect the precipitation to obtain the natural mulberry leaf dye;
[0023] Take 1g of mulberry leaf natural dye, use Na with a concentration of 1mol / L 2 CO 3 Dissolve 50mL of the solution, then dilute it with water to 500mL, and add 1m of silk after conventional pretreatment. 2 Put it into the dyeing solution for dyeing, the dyeing temperature is 80°C, and the time is 50min. After dyeing, the silk fabric is taken out and fully washed and dried in the shade.
[0024] After determination, the ...
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