Taro leaf dye extracting method, dyeing method and application

An extraction method and taro leaf technology are applied in the directions of dyeing, azo dyes, organic dyes, etc., which can solve the problems of difficulty in collecting raw materials, waste of resources, low output, etc., and achieve the improvement of dyeing depth and color fastness. The effect of reducing pollution

Inactive Publication Date: 2017-12-12
陈值英
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

And natural dyestuff has following shortcoming: the first, source is limited, and raw material is difficult to collect, and cost is higher; The selection and staining method are related
[0003] Taro is widely planted in my country, especially in South China. When it is mature, people only eat its rhizome. A small amount of taro leaves are used a

Method used

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  • Taro leaf dye extracting method, dyeing method and application

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Effect test

Embodiment 1

[0026] A kind of extracting method of taro leaf dye, comprises the following steps:

[0027] Step 1: After picking fresh taro leaves of mature taro and washing away other impurities such as sediment, evenly spray the soda water solution with a Ph of 10 on the taro leaves, and expose to the sun for browning at a temperature of 30°C and a relative humidity of 70°C. %, after 8 hours, the detected browning area has reached 90%, and browned taro leaves are obtained;

[0028] Step 2: Take the browned taro leaves in step 1 and soak them in 3% hydrogen peroxide for 15 minutes, then filter, dry or air-dry the taro leaves, and add them to the dried browned taro leaves 8 times after powdering with a powder machine In an ethanol solution with a mass fraction of 2% NaOH and a volume fraction of 30%, ultrasonic extraction was carried out at a temperature of 90°C for 180 min, and the filtrate was obtained by filtration. Dry in a dryer at 50°C to obtain brown dye powder.

Embodiment 2

[0030] A kind of extracting method of taro leaf dye, comprises the following steps:

[0031] Step 1: After picking fresh taro leaves of mature taro and washing away other impurities such as sediment, evenly spray the soda water solution with a Ph of 11 on the taro leaves, and expose to the sun for browning, the temperature is 32°C, and the relative air humidity is 60°C %, after 10 hours, the detected browning area has reached 93%, and browned taro leaves are obtained;

[0032] Step 2: Take the browned taro leaves in step 1 and soak them in 3% hydrogen peroxide for 20 minutes, then filter, dry the taro leaves, beat them with a powder machine, and add them to the dried browned taro leaves containing 5 times the weight of the dried taro leaves. In an ethanol solution with a mass fraction of 2% and a volume fraction of 25%, ultrasonic extraction was carried out at 60°C for 350 minutes, and the filtrate was obtained by filtration. After standing for 10 hours, the filtrate was centr...

Embodiment 3

[0034] A kind of extracting method of taro leaf dye, comprises the following steps:

[0035] Step 1: After picking fresh taro leaves of mature taro and washing away other impurities such as sediment, evenly spray the soda water solution with a Ph of 9 on the taro leaves, and expose to the sun for browning, the temperature is 25 ° C, and the relative air humidity is 80 %, after 6 hours, the detected browning area has reached 85%, and browned taro leaves are obtained;

[0036] Step 2: Take the browned taro leaves in step 1 and soak them in 3% hydrogen peroxide for 15 minutes, then filter, dry the taro leaves, beat them with a powder machine, and add 8 times the weight of the dried browned taro leaves. In an ethanol solution with a mass fraction of 2% and a volume fraction of 45%, ultrasonic extraction was carried out at a temperature of 70°C for 300 min, and the filtrate was obtained by filtration. ℃ drying to obtain brown dye powder.

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Abstract

The invention provides a taro leaf dye extracting method, a dyeing method and application, and belongs to the field of natural dye extracting methods. The method comprises the steps of taking fresh taro leaves of ripe taros, washing the fresh leaves clean, browning the fresh leaves, putting the browned taro leaves into hydrogen peroxide with a volume fraction of 2 to 4%, and soaking for 10 to 30min; then filtering, airing, mechanically smashing, adding into an ethanol solution with the weight of 5 to 10 times that of dried and browned taro leaves and a volume fraction of 25 to 45%, performing ultrasonic extraction for 150 to 300min under the condition that a temperature is 60 to 90 DEG C, filtering to obtain filtrate, enabling the filtrate to stand for 6 to 12h, and concentrating and drying to obtain dye powder. The taro leaf dye extracting method disclosed by the invention has the advantages that the brown taro leaves are selected and utilized to extract dye, experiments show that the dye is good redish brown and taupe dye applied to protein fabric, the problem that existing natural dye has poor color fastness is solved, low price and wide sources of raw materials are achieved, not only is dye production cost reduced, but also environment protection is achieved, and pollution is reduced.

Description

technical field [0001] The invention relates to the extraction method and application field of natural dyes, in particular to the extraction method, dyeing method and application of taro dye. Background technique [0002] Dyes are divided into two categories: natural dyes and synthetic dyes. Natural dyes have a long history of use in China. At present, synthetic dyes are mainly used in fabrics that are cheap and easy to obtain in large quantities. With the continuous enhancement of human health awareness and environmental protection concepts, developed The country took the lead in noticing the harm of synthetic dyes to the environment and health, and listed some highly carcinogenic and toxic dyes as banned dyes. These synthetic dye compounds are worn on the body, absorbed by the human body for a long time, and after activation, the human body Changes in the structure and function of cells, thus transforming into human disease-inducing factors. Therefore, natural dyes have o...

Claims

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Application Information

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IPC IPC(8): C09B61/00D06P1/34D06P3/14D06P3/04
CPCC09B61/00D06P1/34D06P3/04D06P3/14
Inventor 陈值英蓝海洋
Owner 陈值英
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