A kind of preparation method and application of chitosan-natural plant pigment macromolecular dye solution
A technology of natural plant pigments and natural plant dyes, applied in the field of preparation of chitosan-natural plant pigment macromolecular dyes, can solve the problem of low combination fastness between natural plant dyes and textiles, poor color fastness of dyed fabrics, and high impurity content and other problems, to achieve the effect of good color fastness, strong coloring ability and deep color
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Embodiment 1
[0023] (1) The molecular weight is 5×10 4 , Chitosan with a degree of deacetylation of 95% is dissolved in an acetic acid solution with a solute mass fraction of 0.5% to prepare a chitosan solution with a mass fraction of 5%. At this time, the chitosan is viscous. Add dropwise at 40°C Mass fraction of 5% hydrogen peroxide solution (the volume ratio of 5% hydrogen peroxide solution to chitosan solution is 0.2:1), after the dropwise addition, react at a constant temperature for 0.5h, after the reaction, cool to obtain chitosan Dispersion solution: At a height of 10cm from the liquid surface, use a No. 5 needle to drop the above chitosan dispersion into a 10g / L NaOH solution under magnetic stirring. After the addition is complete, the chitosan microspheres Filter out, wash with distilled water 3 times, dry in vacuum at 50°C, and set aside;
[0024] (2) Dissolve 1 g of Rubia madder extract in 100 mL of water, then add 10 g of chitosan microspheres prepared in step (1), stir under mag...
Embodiment 2
[0034] (1) The molecular weight is 10×10 4 , Chitosan with a degree of deacetylation of 90% is dissolved in an acetic acid solution with a solute mass fraction of 1%, and a 3% mass fraction chitosan solution is prepared. At this time, the chitosan is viscous. Add dropwise at 60°C Mass fraction of 5% hydrogen peroxide solution (the volume ratio of 5% hydrogen peroxide solution to chitosan solution is 0.4:1), after dropping, react at constant temperature for 1.5h, after the reaction, cool to obtain chitosan Dispersion: At a height of 10cm from the liquid surface, use a No. 5 needle to drop the above chitosan dispersion into a 20g / L NaOH solution under magnetic stirring. After the addition is complete, the chitosan microspheres Filter out, wash with distilled water 5 times, dry at 80°C under vacuum, and set aside;
[0035] (2) Dissolve 1g of Scutellaria baicalensis extract in 100mL of water, then add 30g of chitosan microspheres prepared in step (1), and stir for 8h at 50℃ under mag...
Embodiment 3
[0040] (1) The molecular weight is 8×10 4 2. Chitosan with a degree of deacetylation of 92% is dissolved in an acetic acid solution with a solute mass fraction of 0.8%, and a 4% mass fraction chitosan solution is prepared. At this time, the chitosan is viscous. Add dropwise at 50°C Mass fraction of 5% hydrogen peroxide solution (the volume ratio of 5% hydrogen peroxide solution to chitosan solution is 0.3:1), after dropping, react at constant temperature for 1h, after the reaction, cool to obtain chitosan dispersion Liquid; at a height of 10cm from the liquid surface, use a No. 5 needle to drop the above chitosan dispersion into the 15g / L NaOH solution under magnetic stirring. After the dropping, filter the chitosan microspheres After washing with distilled water 4 times, drying in vacuum at 60°C, set aside;
[0041] (2) Dissolve 1 g of turmeric extract in 100 mL of water, then add 20 g of chitosan microspheres prepared in step (1), and stir under magnetic stirring at 40°C for 16...
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