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Preparation method of natural dye of euphorbia humifusa and application thereof

A technology of natural dyes and broccoli, applied to natural dyes and their application fields, can solve problems such as no reports, and achieve the effects of excellent antibacterial properties, good color fastness and low price

Active Publication Date: 2013-04-24
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the research on Dijincao mainly focuses on medicine and feed. There are no reports at home and abroad on the preparation method, dyeing process and antibacterial performance of Dijincao natural dyes on silk and wool.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Wash the plant Dijincao, dry, mechanically pulverize, weigh 1 kg of powder, and use 50 kg of 40% (v / v) ethanol aqueous solution with a pH value of 11 (adjusted by sodium silicate) at a temperature of 70 ° C. Extract for 120 minutes, filter, centrifuge and distill under reduced pressure to concentrate to 5 liters, which is the concentrated natural dye of Dijincao.

Embodiment 2

[0023] The plant Dijincao is washed, dried, mechanically crushed, weighed 1 kg of powder, soaked at 50°C with 10 kg of 80% (v / v) ethanol aqueous solution with a pH of 9 (adjusted by sodium carbonate) Extract for 180 minutes, filter, centrifuge and distill under reduced pressure to concentrate to 5 liters, which is the concentrated natural dye of Dijincao.

Embodiment 3

[0025] Wash, dry, and mechanically pulverize the plant Dijincao, weigh 1 kg of powder, and extract it with 30 kg of ethanol aqueous solution with a pH value of 10 (adjusted by sodium phosphate) and 60% (v / v) at a temperature of 90 ° C. After 60 minutes, filter, centrifuge and distill under reduced pressure to concentrate to 5 liters, which is the concentrated natural dye of Dijincao.

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PUM

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Abstract

The invention relates to a natural dye and the application field thereof, aiming to provide a preparation method of natural dye of euphorbia humifusa as well as the application thereof. The preparation method comprises the following steps of: (1) cleaning, drying and mechanically crushing plant euphorbia humifusa to obtain euphorbia humifusa powder; and (2) adding the euphorbia humifusa powder to an aqueous ethanol solution with a pH value of 9-11 to reflux and extract; and increasing the temperature of the extracting solution to 50-90 DEG C, keeping the temperature, filtering, reducing pressure and distilling to obtain a condensed natural dye of euphorbia humifusa. The extraction process of the natural dye of euphorbia humifusa can not pollute environmental, the dyed fabrics have gentle color, are safe to wear without taking the carcinogenic and teratogenic effects or causing allergic reaction and have compatibility with ecological environment to be biodegradable. Moreover, the euphorbia humifusa raw materials are abundant, cheap, the dye extraction process is simple, and the dye has stable quality and extremely wide market prospects.

Description

technical field [0001] The invention relates to the field of natural dyes and applications thereof, in particular to the preparation and application of natural dyes from Dijin grass. Background technique [0002] The rapid development of modern science and technology and social economy has continuously improved people's living standards and greatly improved their quality of life. Human health has become the most concerned issue in the world today. In today's green and environmental protection trend, textiles and clothing tend to be natural, people yearn to return to nature, and the demand for green and safe textiles is becoming more and more urgent. And natural dyes have been favored again after years of neglect. Therefore, it is a current development trend to develop and utilize natural plants for the benefit of mankind. [0003] From the perspective of green production, plant dyes have incomparable advantages over synthetic dyes. It is a pure natural plant that is extrac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09B61/00C09B67/10D06P3/04D06P3/14D06P1/34
Inventor 余志成高佩佩杨斌
Owner ZHEJIANG SCI-TECH UNIV
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