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Method for dyeing cotton fabric with colocasia esculenta dye

A dyeing method and cotton fabric technology, which is applied in the field of natural dye dyeing, can solve the problems of difficult collection of raw materials, high cost, and low output, and achieve the effects of improving dyeing depth and color fastness, being conducive to stability, and low price

Inactive Publication Date: 2017-11-28
陈值英
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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
Taro leaf dyes have been tested to prove that their color fastness to direct dyeing of cotton fabrics is not high and the dyeing is uneven

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A method for dyeing cotton fabric with taro dye, comprising the following steps:

[0024] Extraction of taro dye: pick fresh taro leaves from ripe taro, wash away other impurities such as sediment, and then expose to the sun for browning. The temperature is 30°C and the relative air humidity is 70%. After 8 hours, the browning area is detected. It has reached 90%, and the browned taro leaves are obtained; the browned taro leaves are soaked in 3% hydrogen peroxide for 15 minutes, then filtered, the taro leaves are dried or air-dried, and added to the dried browned taro leaves after powdering by a powder machine. In an ethanol solution containing 2% NaOH by mass fraction and 30% volume fraction by 8 times the weight of taro leaves, ultrasonic extraction was carried out at a temperature of 90°C for 180 minutes, and the filtrate was obtained by filtration. After centrifugation, dry at 50°C in a dryer to obtain brown dye powder;

[0025] Modification of cotton fabric: Make ...

Embodiment 2

[0029] A method for dyeing cotton fabric with taro dye, comprising the following steps:

[0030] Extraction of taro dye: pick fresh taro leaves from mature taro, wash away other impurities such as sediment, and then expose to the sun for browning. The temperature is 32°C, and the relative air humidity is 60%. After 10 hours, the browning area is detected. It has reached 93%, and the browned taro leaves are obtained; the browned taro leaves are placed in 3% volume fraction of hydrogen peroxide and soaked for 20min, then filtered, the taro leaves are dried, and added to the dried browned taro leaves after powdering by a powder machine. In an ethanol solution with a mass fraction of 2% NaOH and a volume fraction of 25% by twice the weight, ultrasonic extraction was carried out at a temperature of 60°C for 350 min, and the filtrate was obtained by filtration. Dried at 50°C in a dryer to obtain brown dye powder;

[0031] Modification of cotton fabric: Make cationic modifier into a...

Embodiment 3

[0035] A method for dyeing cotton fabric with taro dye, comprising the following steps:

[0036] Extraction of taro dye: pick fresh taro leaves from ripe taro, wash away other impurities such as sediment, and then expose to the sun for browning. The temperature is 25°C and the relative air humidity is 80%. After 6 hours, the browning area is detected. It has reached 85%, and the browned taro leaves are obtained; the browned taro leaves are soaked in 3% hydrogen peroxide for 15 minutes, then filtered, the taro leaves are dried, and then added to the dried browned taro leaves 8 times In an ethanol solution with a mass fraction of 2% NaOH and a volume fraction of 45%, ultrasonic extraction was performed for 300 min at a temperature of 70°C, and the filtrate was obtained by filtration. After standing for 12 h, the filtrate was centrifuged at 4000r / min and dried. Dry in the machine at 50°C to obtain brown dye powder;

[0037] Modification of cotton fabric: Make cationic modifier i...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Abstract

The invention discloses a method for dyeing a cotton fabric with a colocasia esculenta dye, and relates to the field of natural dye application. The method comprises the following steps: extracting a colocasia esculenta dye; modifying a cotton fabric, namely preparing a 2-10g / L solution from a cation modifier; further adding 2-4g / L NaOH, uniformly stirring; putting the cotton fabric in a bath ratio of 1:(10-40); putting into an ultrasonic vibrator; heating to 60 DEG C at a speed of 2 DEG C / minute; performing a heat-preservation reaction for 30-50 minutes; putting into an oven to bake for 20-30 minutes at 60 DEG C, and taking out; and preparing a dye solution, and dyeing the cotton fabric. The dye is extracted from browned colocasia esculenta, and tests show that the problem that a conventional natural dye is poor in color fastness is overcome after the cotton fabric is modified with the dye; and the raw materials are low in price and wide in source, the dye production cost is lowered, the environment is protected, and pollution is reduced.

Description

technical field [0001] The invention relates to the application field of natural dye dyeing, in particular to a method for dyeing cotton fabric with taro leaf 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 once again attracted people's...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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IPC IPC(8): D06P1/34D06P1/00D06P3/60D06M15/285D06M101/06
CPCD06M15/285D06M2101/06D06P1/0032D06P1/34D06P3/60
Inventor 陈值英蓝海洋
Owner 陈值英
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