A kind of preparation method of cotton fabric yellow vegetable dye
A technology for yellow plants and cotton fabrics, applied in the field of printing and dyeing, can solve the problems of increasing the difficulty of processing printing and dyeing wastewater, high preparation cost and complexity, and achieve the effects of high friction resistance, simple preparation method, and high color fastness to washing.
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[0024] The invention provides a method for preparing a yellow vegetable dye for cotton fabrics. The method comprises: putting orange peels in water according to a mass ratio of 1:(10-20), heating and ultrasonicating, and drying to obtain dye 1 after filtering; Ratio 1: (30-50) Put the petals of Jasmine japonica into an organic solvent, perform heating and intermittent ultrasonication, filter, concentrate under reduced pressure and dry in sequence to obtain dye 2; according to the mass ratio 10: (10-20): ( 0.5-1) Mix dye 1, dye 2 and loess to prepare yellow vegetable dye for cotton fabric.
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Embodiment 1
[0041] Wash, dry and pulverize orange peels and jasmine petals, put the pulverized orange peels in water at a mass ratio of 1:10, heat and ultrasonicate at 70 degrees Celsius for 2 hours, filter through a 100-mesh sieve, and filter the filtrate in Dye 1 was obtained by vacuum-drying at 30 degrees Celsius; the pH value of 90% hydrous ethanol was adjusted to 5 with hydrochloric acid, and the pulverized Jasmine jasmine petals were put into the ethanol solvent with adjusted pH value according to the solid-to-liquid ratio of 1:30. Heating at 50°C for 1 hour, ultrasonication every 20 minutes during the heating process; after stopping the heating, filter with a 100-mesh sieve, and at 40°C, use a rotary evaporator to concentrate the filtrate twice under reduced pressure to obtain concentrated dye Dye concentrate was vacuum-dried at 35 degrees Celsius to obtain dye 2; dye 1, dye 2 and loess were mixed according to the mass ratio of 10:10:0.5 to obtain cotton fabric yellow vegetable dye ...
Embodiment 2
[0043] Clean, dry and pulverize the orange peel and Jasmine jasmine petals, put the pulverized orange peel in water according to the mass ratio of 1:20, heat and ultrasonic for 4 hours at 100 degrees Celsius, filter with a 140-mesh sieve, and put the filtrate in the Vacuum-dry at 50 degrees Celsius to obtain dye 1; use sodium hydroxide to adjust the concentration to 90%-100% water-containing isopropanol to a pH value of 9, and put crushed winter jasmine petals into it according to a solid-to-liquid ratio of 1:50 to adjust the pH In the isopropanol solvent with a high value, heat at 65 degrees Celsius for 3 hours, and perform ultrasonication every 30 minutes during the heating process; after stopping the heating, filter it with a 140-mesh sieve, and pass the filtrate through a rotary evaporator at 50 degrees Celsius Concentrate under reduced pressure 4 times to obtain a concentrated dye solution, dry the concentrated dye solution at 50 degrees Celsius in vacuum to obtain dye 2; ...
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