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Method for extracting natural cassia dye and preparation of textile soaked in natural cassia dye

The technology of a natural dye and an extraction method is applied in the extraction of cinnamon natural dyes and the application field of dyeing agents, which can solve the problems of poor extraction efficiency, long time consumption, no reports, etc., and achieves short time, good compatibility, Good color fastness

Active Publication Date: 2015-11-11
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above extraction methods are all carried out in ethanol solution, not only the extraction efficiency is poor, but also time-consuming
[0005] At present, the research on cassia bark is only limited to the study of medicinal value and food coloring, and there is no report on the preparation method and application process of cassia bark natural dyes.

Method used

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  • Method for extracting natural cassia dye and preparation of textile soaked in natural cassia dye
  • Method for extracting natural cassia dye and preparation of textile soaked in natural cassia dye
  • Method for extracting natural cassia dye and preparation of textile soaked in natural cassia dye

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Wash the cassia bark, dry it in the air, and crush it mechanically. Weigh 1 kg of the ground cassia bark and add it to 10 kg of ethanol aqueous solution containing sodium hydroxide, and reflux extraction at 90°C for 30 minutes to obtain the extract; take a small amount of the extract, and add it to It was obtained after ultraviolet spectrum analysis in the accompanying drawing figure 1 The ultraviolet-visible spectrogram; Wherein, the mass percentage concentration of ethanol is 20% in the ethanol aqueous solution, contains sodium hydroxide 0.5g in every kilogram of ethanol aqueous solution. Then, the extract was filtered, and concentrated to 5 kg by distillation under reduced pressure to obtain the concentrated cassia bark natural dye.

[0028] Depend on figure 1 It was found that the maximum absorption wavelength of the extract of ground cinnamon bark was 250 to 300 nm.

Embodiment 2

[0030] Wash the cinnamon bark, dry it in the air, and crush it mechanically. Weigh 1 kg of the ground cinnamon bark and add it to 20 kg of ethanol aqueous solution containing sodium hydroxide, and reflux extraction at 80°C for 70 minutes to obtain an extract. Wherein, the mass percent concentration of ethanol in the ethanol aqueous solution is 30%, and every kilogram of ethanol aqueous solution contains 1 g of sodium hydroxide. Then the extract was filtered and concentrated to 5 kg by distillation under reduced pressure to obtain concentrated cinnamon natural dye.

Embodiment 3

[0032] Wash the cinnamon bark, dry it in the air, and crush it mechanically. Weigh 1 kg of the ground cinnamon bark and add it to 30 kg of ethanol aqueous solution containing sodium hydroxide, and reflux extraction at 60°C for 120 minutes to obtain an extract. Wherein, the mass percent concentration of ethanol in the ethanol aqueous solution is 40%, and every kilogram of ethanol aqueous solution contains 1.5 g of sodium hydroxide. Then the extract was filtered and concentrated to 5 kg by distillation under reduced pressure to obtain concentrated cinnamon natural dye.

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Abstract

The invention discloses a method for extracting natural cassia dye and preparation of a textile soaked in the natural cassia dye. The natural cassia dye is extracted through the following steps: cleaning cassia, drying the cleaned cassia in the air, and mechanically pulverizing the cassia; adding the pulverized cassia into an ethanol aqueous solution containing sodium hydroxide; performing reflux extraction for 0.5-2 h at 60-90 DEG C to obtain the extracting solution; then filtering the extracting solution; and performing reduced pressure distillation to obtain the concentrated natural cassia dye. The natural cassia dye extracted from cassia is bright tawny, and has a maximum absorption wavelength in a range of 250-300 nm. The extracted natural cassia dye can be used for dyeing through mordant dyeing and dyeing processes. Through measurement with the help of a computer color measuring and matching instrument, the dye has excellent dyeing property for protein fiber textiles. Different colors can be obtained through treating the natural cassia dye with different mordants. The natural cassia dye is excellent in fastness and properties.

Description

technical field [0001] The invention relates to a natural dye and its application, in particular to a method for extracting the natural cinnamon dye and the application of the natural cinnamon dye as a dyeing agent for protein fiber fabrics. Background technique [0002] Natural dyes are mainly pigments extracted from plant rhizomes, husks, leaves, etc. Most of the natural dyes not only have certain medicinal functions, but also can be used as dyes and dyed protein fibers. Therefore, it has good ecological environment compatibility and can be biodegraded. It has broad application prospects in the field of functional textiles. [0003] Cinnamon, also known as Chai Gui, Cinnamon, etc. It is native to India and Malaysia, and is mainly distributed in Guangdong, Hunan, Zhejiang and other places in China. Existing data show that the composition of cinnamon bark is complex, mainly including cinnamic aldehyde, phenylacrylic acid compounds and other pharmacological active ingredie...

Claims

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Application Information

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IPC IPC(8): C09B61/00D06P1/34D06P3/14D06P3/04
CPCC09B61/00D06P1/34D06P3/04D06P3/14
Inventor 余志成刘文凤
Owner ZHEJIANG SCI-TECH UNIV
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