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Extraction method of high-stability salix leaf pigment dye

A technology with high stability and extraction method, which is applied in the field of willow leaf pigment dye extraction, can solve the problems of ineffective use of salicylic acid and its derivatives, poor pigment stability and dyeing effect, and achieve high value Utilization, accelerated dissolution, and high stability effects

Inactive Publication Date: 2017-08-04
霍邱县淮美奇工艺品有限公司
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Problems solved by technology

The document "Extraction of Natural Pigment from Willow Leaves and Its Application in Silk Dyeing" extracts willow leaves with sodium hydroxide solution at 80-100°C, and the extract can effectively dye silk, but this extraction method does not Without the effective use of salicylic acid and its derivatives, the stability of the pigment and the dyeing effect on fiber materials such as chemical fibers are not good

Method used

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Embodiment Construction

[0019] A method for extracting highly stable willow leaf pigment dyes, comprising the following steps:

[0020] (1) Pick fresh, complete and mature willow leaves, clean them and put them into a grinder, add absolute ethanol and nano-silicon dioxide in sequence, grind and pulverize them, and extract the slurry twice at 60°C, each time Extract for 2 hours to obtain the extract;

[0021] (2) Filter the extract through an ultrafiltration membrane, collect the filtrate, concentrate and dry the filtrate, and obtain the pigment powder for later use;

[0022] (3) Take chitosan and phthalic anhydride, put them into DMF in turn, raise the temperature to 100°C, stir and reflux under nitrogen atmosphere for 4 hours, then pour the reaction product into ice water, and wash the precipitate with alcohol to neutral After drying, the material is ground into fine powder to obtain modified chitosan for subsequent use;

[0023] (4) Put the pigment powder and modified chitosan into dichloromethan...

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Abstract

The invention discloses a method for extracting willow leaf pigment dyes with high stability. The alcohol extraction method is used to maximize the extraction of various pigments in willow leaves, which is more efficient than the traditional alkali extraction method. In the process, nano-silica is used as an auxiliary agent to speed up the dissolution of the pigment. At the same time, the amino-protected chitosan compound and the salicylic acid in the pigment undergo an effective esterification reaction to produce salicylated derivatives. , it has very good dyeing-assisting performance, and the pigment stability after chitosan modification is higher, and finally the modified pigment is saponified to make a water-soluble high-stable natural pigment dye, which realizes the high-efficiency of the pigment in willow leaves , Stable extraction, realizing the high-value utilization of willow leaves.

Description

technical field [0001] The invention relates to the technical field of natural pigment extraction, in particular to a method for extracting highly stable willow leaf pigment dye. Background technique [0002] The Huaihe River Basin in Anhui Province has been rich in Qi Liu since ancient times. The common people used local materials to make a large number of production utensils and living tools. Artists came out in large numbers and passed down from generation to generation. The weaving skills are superb, the artistic quality is unique, and it has a strong flavor of folk culture. With the development of social economy, traditional willow weaving production has gradually developed into modern willow weaving industry. On the basis of maintaining the essence of traditional willow weaving technology, it is necessary to realize the virtuous circle development of the industry, improve the utilization rate of resources and form a development model of multiple industrial chains. Prer...

Claims

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Application Information

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IPC IPC(8): C09B61/00C09B67/54
CPCC09B61/00C09B68/20C09B68/485
Inventor 程光耀潘同利沈家明潘井平何冬梅胡怀平潘光群张言国
Owner 霍邱县淮美奇工艺品有限公司
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