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Method for extracting natural dye from rubia cordifolia as well as natural dye prepared by the method and dyeing method

A technology of natural dyes and madder, applied in the field of natural dyes and dyeing, can solve the problems of poor dyeing effect, achieve good dyeing effect of natural dyes, simple extraction process, and good compatibility

Inactive Publication Date: 2018-11-30
WUHAN TEXTILE UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for extracting natural dyes from madder and the natural dyes and dyeing methods prepared by the method in order to overcome the poor dyeing effect of the natural dyes from madder extracted by the existing method.

Method used

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  • Method for extracting natural dye from rubia cordifolia as well as natural dye prepared by the method and dyeing method
  • Method for extracting natural dye from rubia cordifolia as well as natural dye prepared by the method and dyeing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The madder root is washed, dried, and mechanically crushed to obtain crushed objects with a size of 0.5-3 mm. Weigh 10 g of crushed madder root, add to 200 mL of NaOH solution with a concentration of 0.1 g / L, and stir at 70° C. for 60 min. Then, the extract was vacuum filtered, distilled under reduced pressure to 50 mL, and then freeze-dried to obtain a red block-shaped madder natural dye.

[0033] The silk to be dyed is put into the dyeing liquor that is made up of madder natural dyestuff, mordant aluminum potassium sulfate and water and is dyed, wherein weighs 2g silk, the quality of madder natural dyestuff accounts for 4% of silk quality, mordant aluminum potassium sulfate The mass of the silk accounts for 2% of the silk mass, the liquor ratio during dyeing is 1:40, the dyeing temperature is 70°C, the dyeing time is 60min, and the pH of the dye solution is 5. The dyed silk was washed and dried to obtain dyed sample A1.

Embodiment 2

[0035] The madder root is washed, dried, and mechanically crushed to obtain crushed objects with a size of 0.5-3 mm. Weigh 10 g of crushed madder, add to 300 mL of NaOH solution with a concentration of 0.5 g / L, and stir at 80° C. for 80 min. Then, the extract was vacuum filtered, distilled under reduced pressure to 50 mL, and then freeze-dried to obtain a red block-shaped madder natural dye.

[0036] The silk to be dyed is put into the dye solution that is made up of madder natural dyestuff, mordant aluminum potassium sulfate and water and is dyed, wherein weighs 2g silk, the quality of madder natural dyestuff accounts for 3% of silk quality, mordant aluminum potassium sulfate The quality of the dye accounts for 3% of the cotton yarn quality, the liquor ratio during dyeing is 1:30, the dyeing temperature is 70°C, the dyeing time is 60min, and the pH of the dye solution is 4.5. The dyed silk was washed and dried to obtain dyed sample A2.

Embodiment 3

[0038] The madder root is washed, dried, and mechanically crushed to obtain crushed objects with a size of 0.5-3 mm. Weigh 10 g of crushed madder, add to 300 mL of NaOH solution with a concentration of 1 g / L, and stir at 90° C. for 90 min. Then, the extract was vacuum filtered, distilled under reduced pressure to 50 mL, and then freeze-dried to obtain a red block-shaped madder natural dye.

[0039] The silk to be dyed is put into the dye solution that is made up of madder natural dyestuff, mordant aluminum potassium sulfate and water and is dyed, wherein weighs 2g silk, the quality of madder dye accounts for 3% of silk mass, the mordant aluminum potassium sulfate The mass accounts for 4% of the silk mass, the liquor ratio during dyeing is 1:20, the dyeing temperature is 70°C, the dyeing time is 60min, and the pH of the dyeing solution is 4. The dyed silk was washed and dried to obtain dyed sample A3.

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Abstract

The invention relates to the field of natural dye extracting and dyeing, discloses a method for extracting natural dye from rubia cordifolia as well as the natural dye prepared by the method and a dyeing method. The method for extracting natural dye from rubia cordifolia comprises the following steps: washing, drying and crushing rubia cordifolia roots, and extracting the obtained crushed materials in an alkaline aqueous solution; and sequentially performing suction filtration, distillation and freeze-drying on the obtained extracting liquor. The rubia cordifolia natural dye prepared by the method for extracting natural dye from rubia cordifolia has an obvious and relatively good dyeing effect; and specially, the dyed sample in deeper in surface color, and is better in color firmness.

Description

technical field [0001] The invention relates to the field of extraction and dyeing of natural dyes, in particular to a method for extracting natural dyes from madder, natural dyes prepared by the method and a dyeing method. Background technique [0002] Natural dyes are a kind of dyes that have good compatibility with the ecological environment, are biodegradable, and are non-toxic. They are very green and friendly to the human body, and the raw materials used to produce these dyes are basically from Extracted from raw materials such as plants, animals, minerals and microorganisms. In addition to dyeing, natural dyes also have the effects of antibacterial, anti-inflammatory, anti-oxidation, and anti-ultraviolet radiation. Therefore, natural dyes have broad application prospects in the fields of home textile products and decorations. [0003] Rubia, also known as Huoxuecao, belongs to Rubiaceae and is a perennial herb. Its roots are orange. It is distributed in many areas of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09B61/00C09B67/54D06P1/34D06P3/24D06P3/14D06P3/60D06P3/82
CPCC09B61/00C09B67/0096D06P1/34D06P3/14D06P3/24D06P3/60D06P3/82
Inventor 姜会钰唐旺姚金波王志意唐秀琴胡晓东
Owner WUHAN TEXTILE UNIV
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