Extraction of natural gromwell dye and application thereof

A technology of natural dyes and comfrey, applied in the field of natural dyes and its applications, can solve the problems that synthetic pigments cannot provide nutrients to the human body and endanger human health, and achieve good dyeing effect, good storage performance, and simple extraction process

Inactive Publication Date: 2010-12-15
CHANGZHOU UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, a large number of research reports point out that almost all synthetic pigments cannot provide nutrients to the human body, and some synthetic pigments may even endanger human health, and safety issues have gradually attracted people's attention

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Wash the comfrey raw material with water, dry it, and mechanically crush it into small pieces. Add the pulverized comfrey into 4 times of 60% ethanol solution, ultrasonically extract for 30 minutes at a temperature of 40°C, the ultrasonic power is 100W, and the ultrasonic frequency is 30KHz. After the ultrasonic is finished, filter to obtain the filtrate and filter residue containing natural dyes . Ultrasonic extraction of the filter residue under the same conditions as in the second step, and filtration; combining the filtrates obtained twice, and concentrating by vacuum distillation to obtain a dark red creamy natural dye. The emulsifier is formulated to emulsify the comfrey paste natural dye so that it can be dissolved in water. Color correction agent (purchased from Changzhou Hansi Chemical Co., Ltd.) and Tween80 (Tween 80) were selected for compounding, and the ratio was 1:1. The compounded emulsifier is mixed with the comfrey paste dye at 3 g / liter to obtain a c...

Embodiment 2

[0029] Wash the comfrey raw material with water, dry it, and mechanically crush it into small pieces. Add the pulverized comfrey into 6 times 70% ethanol solution, and extract it by ultrasonic for 40 minutes at a temperature of 50°C. The ultrasonic power is 300W, and the ultrasonic frequency is 60KHz. . Ultrasonic extraction of the filter residue under the same conditions as in the second step, and filtration; combining the filtrates obtained twice, and concentrating by vacuum distillation to obtain a dark red creamy natural dye. The emulsifier is formulated to emulsify the comfrey paste natural dye so that it can be dissolved in water. Color correction agent (purchased from Changzhou Hansi Chemical Co., Ltd.) and Tween80 (Tween 80) were selected for compounding, and the ratio was 1:5. The compounded emulsifier is mixed with the comfrey paste dye at 5 g / liter to obtain a comfrey natural dye aqueous solution. The extraction rate can reach 3.5%.

[0030] Comfrey natural dyes...

Embodiment 3

[0037] Wash the comfrey raw material with water, dry it, and mechanically crush it into small pieces. Add the crushed comfrey into 8 times 90% ethanol solution, and extract it by ultrasonic for 50 minutes at a temperature of 60°C. The ultrasonic power is 500W, and the ultrasonic frequency is 80KHz. . Ultrasonic extraction of the filter residue under the same conditions as in the second step, and filtration; combining the filtrates obtained twice, and concentrating by vacuum distillation to obtain a dark red creamy natural dye. The emulsifier is formulated to emulsify the comfrey paste natural dye so that it can be dissolved in water. Color correction agent (purchased from Changzhou Hansi Chemical Co., Ltd.) and Tween80 (Tween 80) were selected for compounding, and the ratio was 1:10. The compounded emulsifier is mixed with the comfrey paste dye at 10 g / liter to obtain a comfrey natural dye aqueous solution. The extraction rate can reach 3%.

[0038] Comfrey natural dyes ar...

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PUM

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Abstract

The invention relates to extraction of natural gromwell dye and application thereof. The extraction comprises the following steps of: crushing gromwell, ultrasonically extracting the crushed gromwell at a certain temperature by using ethanol solution as a solvent to obtain pasty natural gromwell dye, and adding an emulsifying agent into the pasty natural gromwell dye to perform emulsification so as to obtain aqueous solution of the natural gromwell dye. The natural gromwell dye used for dyeing protein, cotton, polyester fibers, yarns or fabrics has good dyeing effect. The natural dye is extracted from the gromwell, and the solvent is reclaimed for reuse, so the environment is not polluted; and the dye extraction process is simple, and the natural gromwell dye has stable quality and broad market prospect.

Description

technical field [0001] The invention relates to natural dyes and their application fields, in particular to the extraction and application of a comfrey natural dye. Background technique [0002] Natural dyes are extracted from the flowers, leaves, stems, roots and fruits of plants, which have good compatibility with the environment and are biodegradable. During the dyeing process, the medicine, fragrance and pigment components of plant dyes are absorbed by the fabric together, so that the dyed fabric has special medicine and health care functions for the human body. The application of plant dyes in my country has a history of thousands of years. However, since the advent of synthetic dyes in the middle of the 19th century, plant dyes have been increasingly replaced by synthetic dyes. With the increase in the use of synthetic pigments and with the development of society and the improvement of people's living standards, more and more people have questioned whether the use of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09B61/00C09B67/44D06P1/34D06P3/00D06P3/52D06P3/60
Inventor 纪俊玲李海乐席海涛徐成耀何叶丽汪媛张培坤李小琴
Owner CHANGZHOU UNIV
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