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Violet dye extracting method and dyeing application

An extraction method, violet technology, applied in the direction of dyeing, azo dyes, organic dyes, etc., to achieve the effect of improving extraction efficiency, good dyeing color fastness, and broad market prospects

Inactive Publication Date: 2016-07-20
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, there is no report on the extraction of violet flower dyes for clothing dyeing. Violet flowers are rich in anthocyanins, which have a variety of colors and span multiple color systems. Research on dyeing applications and functions has become a research field for plant dyes. important direction

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Extract the violet dye 1 as follows:

[0027] Step 1. Take 100 g of fresh violets and place them in a vacuum freeze dryer, freeze-dry them at a temperature of -15° C. and a vacuum of 10 mmHg for 6 hours, then raise the temperature to 25° C. and continue for 1 hour to obtain freeze-dried violets;

[0028] Step 2, put the freeze-dried violet flower in step 1 into a pulverizer, pass through a 30-mesh sieve, add 0.5% citric acid by mass fraction and 1% dihydrolipoic acid for soaking in 200g mixed solution After 1.5 hours, add absolute ethanol so that the mass fraction of absolute ethanol is 80% of the total mass of the solution, and extract under reflux at 65° C. for 1 hour to obtain an extract;

[0029] Step 3. Concentrate the extract in step 2 in a rotary evaporator under vacuum rotation at 50°C to obtain a paste. For convenience, put the paste into an oven at 50°C and dry it into powder. The quality of the gray powder is It is 4.83g, which is the extracted violet dye 1....

Embodiment 2

[0035] Extract the violet dye 2 as follows:

[0036] Step 1. Take 100 g of fresh violets and place them in a vacuum freeze dryer, freeze-dry them at a temperature of -25° C. and a vacuum of 10 mmHg for 4 hours, then raise the temperature to 26° C. and continue for 0.5 hours to obtain freeze-dried violets;

[0037] Step 2, the freeze-dried violet flower in step 1 is pulverized, added to the mixed solution whose mass fraction is 1% citric acid and mass fraction is 2% dihydrolipoic acid, soaked for 2 hours, added absolute ethanol, made anhydrous The mass fraction of ethanol is 95%, reflux extraction at 90°C for 0.5h to obtain the extract;

[0038] Step 3: Rotate and concentrate the extract in Step 2 at 60°C to obtain a paste, and then dry it at 50°C to form a powder. The gray powder has a mass of 4.26g, which is the extracted violet dye 2.

[0039] Configure the dye solution: take 3g of violet dye, 3g of mordant potassium aluminum sulfate dodecahydrate, 0.5g of emulsifier, and d...

Embodiment 3

[0043] Extract the violet dye 3 as follows:

[0044]Step 1. Take 100g of fresh violets and place them in a vacuum freeze dryer, freeze-dry them at a temperature of ~10°C and a vacuum of 10mmHg for 10 hours, then raise the temperature to 30°C and continue for 1 hour to obtain freeze-dried violets;

[0045] Step 2, pulverize the freeze-dried violet flower in step 1, add it to a mixed solution whose mass fraction is 0.9% citric acid and 1.2% dihydrolipoic acid, soak for 1 hour, add absolute ethanol, make anhydrous The mass fraction of ethanol is 85%, reflux extraction at 50°C for 2 hours to obtain an extract;

[0046] Step 3: Rotate and concentrate the extract in step 2 at 55°C to obtain a paste, and then dry it at 55°C to form a powder. The gray powder has a mass of 4.15g, which is the extracted violet dye 3.

[0047] Configure the dye solution: take 4g of violet dye, 4g of mordant potassium aluminum sulfate dodecahydrate, 0.5g of emulsifier, and dissolve in 100g of water;

[...

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PUM

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Abstract

The invention discloses a violet dye extracting method and dyeing application, and belongs to the application field of natural dyes. The violet dye extracting method comprises the following steps: preparing violet flowers into freeze-dried powder; thermally extracting the pigments of the freeze-dried powder; concentrating and drying the freeze-dried powder into powder; and applying the powder to dyeing application. Dye extracted by the method disclosed by the invention is bright in color, namely bright blue, is good in dyeing color fastness on protein cloth, is safe to wear, and is fee from carcinogenic effect, teratogenic effect or hypersensitive response. A violet raw material disclosed by the invention is widely planted in the southland region of China, is wide in source, and is cheap, so that resources of the natural world are sufficiently utilized, and the market prospect is very wide.

Description

technical field [0001] The invention belongs to the application field of natural dyes, and in particular relates to a violet dye extraction method and its dyeing application, more specifically to the dyeing application of protein fiber cloth. Background technique [0002] Natural dyes refer to dyes obtained from natural raw materials such as plants and animals, and have a long history of application in the course of human development. Natural dyes are soft in color, non-toxic and harmless, non-allergic and carcinogenic to the skin, and have good biodegradability and environmental compatibility. In addition to the dyeing function, they also have various functions such as medicine and fragrance. During the dyeing process, its drug and fragrance components are absorbed by the fabric together with the dye, which has special health care functions for the human body. The international research on the dyeing performance of natural dyes is mainly concentrated in Asia, especially In...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09B61/00D06P1/34D06P3/04
CPCC09B61/00D06P1/34D06P3/04
Inventor 王悦梅
Owner UNIV OF JINAN
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