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Method for preparing aspidium rhizoma natural dye and product thereof

A technology of natural dyes and guanzhong, applied in the field of preparation of guanzhong natural dyes, can solve problems such as no reports, and achieve the effects of good color fastness, good compatibility and stable quality

Inactive Publication Date: 2008-05-14
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] There are no reports about the preparation of Guanzhong natural dyes and their dyeing methods

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Weigh 500 grams of guanzhong, wash, dry, and mechanically pulverize, then soak with 20 times of tap water. After the guanzhong is fully wetted, add the required amount of sodium hydroxide, adjust the pH of the soaking solution to about 13, and heat up to 100°C, simmer for about 60 minutes and then filter. Continue to extract the filter residue with 5-10 times of water (containing sodium hydroxide, pH about 13), combine the two extracts, neutralize and concentrate to 500 ml, which is the concentrated solution of Guanzhong natural dye. Solidify and pulverize to obtain powdered natural dyes.

[0024] Using a conventional dyeing method, under the condition of the metal aluminum salt as a mordant, the above-mentioned natural dyes are used to dye wool to obtain reddish-brown wool products.

Embodiment 2

[0026] Weigh 500 grams of guanzhong, wash, dry, mechanically crush, and then soak in 8 times tap water. After the guanzhong is fully wetted, add the required amount of sodium carbonate, adjust the pH of the soaking solution to about 12, and heat up to 98. ℃, simmer for about 60 minutes and then filter. Continue to extract the filter residue with 5-10 times of water (containing sodium carbonate, pH about 12), combine the two extracts, neutralize and concentrate to 500 ml, which is the concentrated solution of Guanzhong natural dye. Solidify and pulverize to obtain powdered natural dyes.

[0027] Using a conventional dyeing method, under the condition of metal ferrous salt as a mordant, the natural dyes prepared above are used to dye real silk to obtain brown real silk products.

Embodiment 3

[0029] Weigh 500 grams of guanzhong, wash, dry, mechanically crush, and then soak with 12 times of tap water. After the guanzhong is fully wetted, add the required amount of sodium carbonate, adjust the pH of the soaking solution to about 12, and heat up to 100 ℃, simmer for about 60 minutes and then filter. Continue to extract the filter residue with 5-10 times of water (containing sodium carbonate, pH about 12), combine the two extracts, neutralize and concentrate to 500 ml, which is the concentrated solution of Guanzhong natural dye. Solidify and pulverize to obtain powdered natural dyes.

[0030] Using a conventional dyeing method, under the condition of mixing rare earth chloride as a mordant, the natural dyes prepared above are used to dye real silk to obtain yellow-brown real silk products.

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Abstract

The invention discloses a method for preparing natural dyes and products thereof. Crush the plant pulp, then add it to 5-20 times the aqueous solution for soaking, after the pulp is fully wetted, add sodium hydroxide, sodium carbonate, sodium silicate or sodium phosphate, adjust the pH of the solution to 10-13, and heat up Heat to 95-100°C, keep warm for 60-90 minutes, filter; continue to leach the filter residue with an alkaline solution with a pH of 10-13, filter, combine the two extractions to obtain a natural dye stock solution; concentrate, solidify, and pulverize the stock solution to obtain a powder like natural dyes. Silk and wool products can be dyed without mordant, under the condition of mordant dyeing after mixing rare earth chloride, under the condition of mordant dyeing after metal aluminum salt or after mordant dyeing condition of metal ferrous salt; cotton products are firstly treated with cationic modifier After modification, dyeable cotton products are dyed with Guanzhong natural dyes. The invention has the advantages of simple extraction process, high efficiency, stable quality and broad market prospect; the preparation process will not cause environmental pollution.

Description

technical field [0001] The invention relates to natural dyes and applications thereof, in particular to a method for preparing natural dyes and products thereof. 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. Not only that, with the continuous consumption of petroleum resources on the earth, the problem of raw materials for synthetic dyes has become increasingly tense. [0003] Natural dyes are extracted from plant roots, leaves, bark, trunks, husks, flowers or animal secretions...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09B61/00D06P1/34D06P3/60
Inventor 余志成
Owner ZHEJIANG SCI-TECH UNIV
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