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Method for preparing water chestnut hull natural dye and uses thereof

A technology of natural dyes and water chestnut shells, applied in the field of natural dyes, can solve the problems that have not been reported, and achieve the effects of low cost, high extraction efficiency and environmental protection

Inactive Publication Date: 2008-05-21
ZHEJIANG SCI-TECH UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] About the preparation of water chestnut shell natural dye and dyeing method thereof, there is no report at present

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Weigh 500 grams of raw water chestnut shells, crush them mechanically, and then soak them with 10 times of tap water. After the water chestnut shells are fully wetted, add the required amount of sodium carbonate, adjust the pH of the soaking solution to about 8.2, heat up to 100°C, and keep it warm for 90 minutes. filter. Continue to extract the filter residue with 5-10 times of water (containing sodium carbonate, pH is about 8.2), combine the two extracts, neutralize and concentrate to 500 ml, which is the natural dye concentrate of water chestnut shell. Solidify and pulverize to obtain powdered natural dyes.

[0024] Adopt conventional dyeing method, under the condition of ferrous sulfate as mordant, adopt the water chestnut shell natural dye of above-mentioned preparation to dye real silk, obtain the real silk product of dark blue color, its chromaticity index value L * is 34.80, a * is 2.34, b * is -1.61, c * is 2.84, and the K / S value is 5.10.

Embodiment 2

[0026] Weigh 500 grams of raw water chestnut shells, crush them mechanically, and then soak them in 8 times of tap water. After the water chestnut shells are fully wetted, add the required amount of sodium carbonate, adjust the pH of the soaking solution to 9.3, raise the temperature to 90°C, keep it warm for 80 minutes, and then filter . Continue to extract the filter residue with 5-10 times of water (containing sodium carbonate, pH is about 9.3), combine the two extracts, neutralize and concentrate to 500 ml, which is the natural dye concentrate of water chestnut shell. Solidify and pulverize to obtain powdered natural dyes.

[0027] Adopt conventional dyeing method, under the condition of alum as mordant, adopt the water chestnut shell natural dyestuff of above-mentioned preparation to dye wool, obtain the woolen product that dyes beige (with yellow light), its chromaticity index value L * is 64.74, a * is 2.42, b * for 19.17, c * is 19.32, and the K / S value is 2.55.

Embodiment 3

[0029] Weigh 500 grams of raw water chestnut shells, crush them mechanically, and then soak them in 5 times of tap water. After the water chestnut shells are fully wetted, add the required amount of sodium phosphate, adjust the pH of the soaking solution to about 10.1, heat up to 100°C, and keep warm for about 70 minutes After filtering. Continue to extract the filter residue with 5-10 times of water (containing sodium phosphate, pH is about 10.1), combine the two extracts, neutralize and concentrate to 500 ml, which is the natural dye concentrate of water chestnut shell. Solidify and pulverize to obtain powdered natural dyes.

[0030] Adopt conventional dyeing method, under the condition of mixing rare earth chloride as mordant, adopt the water chestnut shell natural dye of above-mentioned preparation to dye real silk, obtain beige (with red light) real silk product, its chromaticity index value L * is 66.42, a * for 5.11, b * is 15.45, c * is 16.27, and the K / S value is ...

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Abstract

The invention discloses a preparation method and application of natural dye of water caltrop shell thereof. The water caltrop shell is smashed and then is added into 5 times to 10 times of aqueous solution to be dipped; after the water caltrop shell is fully wetted, sodium hydroxide, sodium carbonate or sodium phosphate is added until the pH of the solution is adjusted to be 8 to 13; the temperature is raised to be between 90 DEG C and 100 DEG C and then is kept for 60 minutes to 90 minutes; the solution is filtered; the filter residue is continuously dipped, extracted and filtered with the alkali solution with the pH of 8 to 13; the solution after two times of dipping and extraction is combined to prepare the stock solution of the natural dye; the stock solution is contracted, solidified and smashed to prepare the natural dye of powder shape. No mordant, mixed rare earth chloride, metal aluminum salt or metal ferrous salt is used for dying products of natural silk or wool. First cation modifier is used for modification; then the natural dye of water caltrop shell is used for dying cotton products. The invention has the advantages of the simple process, the high efficiency, the stable quality and the broad market prospects.

Description

technical field [0001] The invention relates to natural dyes and applications thereof, in particular to a preparation method and applications of water chestnut shell natural dyes. Background technique [0002] With the increasing awareness of human environmental protection and the increasing concern for their own health, the harm of some synthetic dyes to human health and the ecological environment has become more and more noticeable. Existing research results have shown that there are 23 kinds of carcinogenic aromatic amines, more than 100 synthetic dyes may produce carcinogens, and more than 20 synthetic dyes are allergic to the skin. As a result, synthetic dyes and the textiles they dye have made consumers suspicious. [0003] Water chestnut, also known as water water chestnut and wind water chestnut, is a plant of the genus Lingaceae. It is an annual aquatic plant, native to the warm regions of Europe and Asia. It has a cultivation history of more than 3,000 years in my...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09B61/00D06P1/34D06P3/14D06P3/60
Inventor 余志成高佩佩杨斌吕国良杨波代秀琼
Owner ZHEJIANG SCI-TECH UNIV
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