Environment-friendly method for extracting natural dye from gypsophila oldhamiana to color wool green or yellow

Abstract

The invention relates to an environment-friendly method for coloring wool green or yellow by extracting natural dye from gypsophila oldhamiana. The method comprises the following steps: firstly, cutting three pieces of wool cloth with the same size; secondly, collecting fresh gypsophila oldhamiana, and cleaning and airing the gypsophila oldhamiana; weighing medicago sativa linn, cutting the medicago sativa linn into pieces, mashing the medicago sativa linn pieces with a mortar, heating the medicago sativa linn pieces in a beaker containing experimental water in a water bath, and filtering to obtain Then, two pieces of wool are soaked in beakers containing dye liquor respectively, water bath heating is conducted, stirring is conducted continuously, and NaOH and NaCl are added into one beaker after a period of time; and finally, taking out the fabric from the dye liquor, and fully airing to obtain the colored wool fabric with bright color. The dye provided by the invention is from natural plants, avoids environmental pollution and potential harm to human bodies caused by traditional chemical dyes, has a good dyeing effect, and is suitable for dyeing modern clothes.

Description

Technical Field

[0001] The invention relates to the technical field of textile dyeing, in particular to an environmentally friendly method for extracting natural dyes from hawthorn to color wool green or yellow. Background Art

[0002] Traditional clothing is often dyed with chemical dyes. Although these chemical dyes are brightly colored and have good dyeing stability, their production and use processes are often accompanied by the emission of large amounts of harmful chemicals, posing a potential threat to the environment and human health.

[0003] In the prior art, the production process of chemical dyes usually requires the use of a large amount of water and energy, and discharges a large amount of wastewater and toxic byproducts. For example, the patent document number CN117820539B discloses an aldehyde-free color fixative for dyeing nylon acid dyes, and its preparation method and application, and the patent document number CN113462190A discloses an azo dye compound with high water fastness, preparation method and application. This deficiency also causes harmful chemicals remaining in textiles to cause harm to the human body through skin contact.

[0004] This patent aims to solve the above technical problems and provide an environmentally friendly method for extracting natural dyes from hawthorn to color wool green or yellow, which has a better dyeing effect. Summary of the invention

[0005] The purpose of the present invention is to provide an environmentally friendly method for extracting natural dyes from hawthorn to color wool green or yellow, so as to solve the problems proposed in the above background technology that other existing materials containing chemical dyes contain harmful chemicals and are harmful to the human body.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] S1. Fabric preparation: (1) Cut the wool fabric into three square samples with a side length of 6 cm. (2) Remove the remaining impurities and fibers on the fabric.

[0008] S2. Preparation of dye solution: (1) Collect fresh alfalfa, clean and dry. (2) Weigh the required weight of alfalfa with a weighing instrument. (3) Cut the alfalfa into pieces with scissors and crush them with a mortar. Put them in a beaker filled with experimental water and heat them in a water bath for 60 to 120 minutes and stir them continuously with a glass rod. (4) Filter the dye solution to remove the solid residue to obtain pure alfalfa dye solution.

[0009] S3, dyeing process: (1) Place two of the cut wool fabrics in beakers containing dye solution and heat them in a water bath for 20 to 40 minutes, then add the required amount of NaOH and NaCl to one of the beakers and continue stirring for 20 to 40 minutes. (2) Take the fabric out of the beaker, hang it with a thread, and dry it thoroughly.

[0010] Preferably, the water bath heating temperature in S3 is maintained at 80-90°C.

[0011] Furthermore, in S3, the water bath heating temperature is maintained at 90°C.

[0012] Preferably, in S3, the alfalfa dyeing liquid and the wool fabric are measured at a bath ratio of 1:60 and put into a beaker.

[0013] Preferably, the concentrations of NaOH and NaCl in S3 are 3 g / L and 10 g / L, respectively.

[0014] Preferably, the water bath heating temperature in S2 is 80-90°C.

[0015] Furthermore, in S2, the water bath heating temperature is maintained at 90°C.

[0016] Preferably, the mass ratio of the hawthorn fruit in S2 to the experimental water is 1:2.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] (1) The present invention utilizes natural dyes from clover to replace chemical dyes, thereby achieving an environmentally friendly and pollution-free dyeing process.

[0019] (2) The hawthorn raw material used in the present invention is widely available, low in cost, and has a simple dyeing process, and can be effectively used to dye wool fabrics, thus providing a new and environmentally friendly solution in the field of dye technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the process for preparing the fabric in the present invention;

[0021] Figure 2 Schematic diagram of the process of dye solution preparation;

[0022] Figure 3 Schematic diagram of the dyeing process;

[0023] Figure 4 is the color test data table in the present invention;

[0024] Figure 5 This is a physical picture of the sample prepared in the experiment in Example 1. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] Embodiment 1:

[0027] See also Figure 1-3 , an environmentally friendly method for extracting natural dyes from hawthorn to color wool green or yellow, comprising the following steps:

[0028] Step 1: Cut the wool fabric into 3 square samples with a side length of 6 cm, and remove the remaining impurities and fibers on the fabric.

[0029] Step 2: Collect fresh hawthorn, clean and dry it, weigh 100g hawthorn with a weighing instrument, cut it into pieces with scissors and crush it with a mortar, put it in a beaker filled with 200ml of experimental water, heat it in a water bath at 90℃ for 60-120min and stir it continuously with a glass rod. Filter the dye solution to remove the solid residue to obtain pure hawthorn dye solution.

[0030] Step 3: Place the two cut wool fabrics in a beaker with 54 ml dye solution at a bath ratio of 1:60 and heat in a water bath at 90°C. After 20 to 40 minutes, add 3 g / L NaOH and 10 g / L NaCl to one of the beakers and continue stirring for 20 to 40 minutes. Finally, take the fabric out of the beaker, hang it with a thread and dry it naturally to obtain colored wool without adding alkali and salt and with adding alkali and salt. Figure 5 shown.

[0031] Comparative Example 1:

[0032] The blank control group was set to be untreated 6cm×6cm wool cloth.

[0033] Experimental results:

[0034] As shown in Table 4, according to the samples in Example 1 and Comparative Example 1, their color parameters were tested to obtain parameters such as CIE L, CIE a, and K / S values ​​of wool cloth dyed with hawthorn natural dye, which confirmed the good dyeing effect of the natural dye extracted from hawthorn on wool cloth.

Claims

1. An environmentally friendly method for extracting natural dyes from hawthorn to color wool green or yellow, characterized in that: The steps include: S1. Prepare the fabric: Cut the wool fabric into three square samples with a side length of 6 cm, and remove the remaining impurities and fibers on the fabric. S2. Prepare dye solution: Collect fresh alfalfa, clean and dry it, weigh the required weight of alfalfa, cut it into pieces with scissors and crush it with a mortar, put it in a beaker filled with experimental water, heat it in a water bath for 60 to 120 minutes and stir it continuously with a glass rod. Filter the dye solution to remove the solid residue to obtain pure alfalfa dye solution. S3. Dyeing: Place two pieces of cut woolen cloth in a beaker with dye solution and heat in a water bath for 20 to 40 minutes, then add the required amount of NaOH and NaCl to one of the beakers and continue stirring for 20 to 40 minutes. Finally, take out the cloth from the beaker, hang it with a thread, and dry it thoroughly.

2. The environmentally friendly method for extracting natural dyes from hawthorn to color wool green or yellow according to claim 1, characterized in that: In S3, the water bath heating temperature is maintained at 80-90°C.

3. The environmentally friendly method for extracting natural dyes from hawthorn to color wool green or yellow according to claim 2, characterized in that: In S3, the water bath heating temperature is maintained at 90°C.

4. The environmentally friendly method for extracting natural dyes from hawthorn to color wool green or yellow according to claim 1, characterized in that: In the S3, the alfalfa dyeing liquid and the wool cloth are measured at a bath ratio of 1:60 and put into a beaker.

5. The environmentally friendly method for extracting natural dyes from hawthorn to color wool green or yellow according to claim 1, characterized in that: The concentrations of NaOH and NaCl in the S3 are 3 g / L and 10 g / L respectively.

6. The environmentally friendly method for extracting natural dyes from hawthorn to color wool green or yellow according to claim 1, characterized in that: The water bath heating temperature in S2 is 80-90°C.

7. The environmentally friendly method for extracting natural dyes from hawthorn to color wool green or yellow according to claim 6, characterized in that: In S2, the water bath heating temperature is maintained at 90°C.

8. The environmentally friendly method for extracting natural dyes from hawthorn to color wool green or yellow according to claim 1, characterized in that: The mass ratio of the alpinia cerasifera to the experimental water in S2 is 1:

2.

9. An environmentally friendly method for extracting natural dyes from hawthorn to color wool green or yellow, obtained by the preparation method according to any one of claims 1 to 8.

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