Apocynum venetum pigment staining solution and staining method thereof

Abstract

The invention discloses a preparation method of apocynum venetum pigment dye liquor and a dyeing method, and the preparation method comprises the following steps: taking apocynum venetum leaves, and grinding the apocynum venetum leaves into powder; mixing the crushed dogbane leaves with an ethanol water solution according to a weight ratio of 1: (20-30); the obtained mixed solution is placed in an ultrasonic cleaner, the ultrasonic power ranges from 200 W to 250 W, the temperature ranges from 80 DEG C to 90 DEG C, heating is conducted for 1-2 h, and the apocynum venetum pigment dye liquor is obtained. The dyeing method comprises the following steps: cotton fabric modification; the modified cotton fabric is put into the apocynum venetum pigment dye liquor prepared by the preparation method to be heated in a water bath, stirring is performed in the heating process, and finally the colored cotton fabric is taken out and naturally aired. The apocynum venetum pigment dye liquor provided by the invention has relatively good oxidation resistance, antibacterial performance and ultraviolet resistance. The dyeing method is green and environment-friendly in process, and the dyed fabric has good color fastness to rubbing and antibacterial performance.

Description

Technical Field

[0001] The present invention belongs to the technical field of textile materials, and particularly relates to a apocynum venetum pigment dyeing solution and a dyeing method. Background Art

[0002] In recent years, with the enhancement of environmental awareness, natural dyes have received increasing attention in modern dyeing processes due to their environmental friendliness, health and safety, and uniqueness.

[0003] Most natural dyes and cotton fibers carry negative charges in the dyeing solution. Therefore, the interaction between the dye and the cotton fabric is weak, and it is not easy to form stable chemical bonds, resulting in a low dye uptake rate of the cotton fabric. This repulsive interaction between charges hinders effective chemical bonding, thus affecting the dyeing effect and color fastness. Summary of the Invention

[0004] One of the technical problems to be solved by the present invention is to provide an apocynum venetum pigment dyeing solution with good antioxidant performance, antibacterial performance, and ultraviolet resistance.

[0005] Another technical problem to be solved by the present invention is to provide a dyeing method that is environmentally friendly and the dyed fabric has good rubbing fastness and antibacterial performance.

[0006] The present invention is realized as follows:

[0007] A preparation method of an apocynum venetum pigment dyeing solution includes the following steps:

[0008] Step S1: Take apocynum venetum leaves and grind them into powder.

[0009] Step S2: Mix the powdered apocynum venetum leaves and an ethanol aqueous solution in a weight ratio of 1:20 - 30.

[0010] Step S3: Place the mixture obtained in Step S2 in an ultrasonic cleaner with an ultrasonic power of 200W - 250W and a temperature of 80 - 90°C, and heat for 1 - 2h to obtain the apocynum venetum pigment dyeing solution.

[0011] Further, the concentration of the ethanol aqueous solution in Step S2 is 60% - 80%.

[0012] A dyeing method for cotton fabrics includes the following steps:

[0013] Modification of cotton fabric: The cotton fabric is put into a sodium hydroxide solution with a mass concentration of 0.5% - 3% for 10 - 30 minutes of pretreatment of the cotton fabric, then 2% - 8% of 3-chloro-2-hydroxypropyltrimethylammonium chloride is added, and the mass ratio of 3-chloro-2-hydroxypropyltrimethylammonium chloride to sodium hydroxide is 1:0.2 - 0.3. The heating temperature is set at 70 - 80 °C and lasts for 30 - 60 minutes. Stirring is carried out during the heating process. Finally, the modified cotton fabric is taken out, rinsed with a 1% - 3% acetic acid solution, rinsed with cold water, and then dried;

[0014] Dyeing of cotton fabric: The modified cotton fabric is put into the apocynum pigment dye liquor prepared by the preparation method of an apocynum pigment dye liquor described in Claim 1 or 2 for water bath heating. The bath ratio is 1:30 - 50, the heating temperature is set at 80 - 90 °C, and the time lasts for 1 - 2 hours. Stirring is carried out during the heating process. Finally, the colored cotton fabric is taken out and dried naturally.

[0015] The advantages of the present invention are as follows:

[0016] 1. The preparation method of the apocynum pigment dye liquor of the present invention extracts apocynum pigment by ultrasonic ethanol extraction, and has good antioxidant performance, antibacterial performance, and anti-ultraviolet performance.

[0017] 2. The cotton fabric dyed by the dyeing method of the present invention has bright color, showing bright yellow, and no chemical reagents are added during the dyeing process. The dyeing process is green and environmentally friendly, and the dyed fabric has good rubbing color fastness and antibacterial performance. After the cotton fabric is modified and then dyed in the present invention, it can promote the research and use of natural plant dyes on cotton fabrics. Description of the drawings

[0018] The present invention will be further described below with reference to the drawings in conjunction with the embodiments.

[0019] Figure 1 is the flow chart of the preparation method of the apocynum pigment dye liquor of the present invention.

[0020] Figure 2 is the flow chart of the dyeing method of the present invention.

[0021] Figure 3 is the comparison schematic diagram of the cotton fabric before dyeing and the cotton fabric dyed by the present invention.

[0022] Figure 4 is the relevant data of the rubbing resistance and anti-ultraviolet effect of the cotton fabric before and after being dyed by the present invention.

[0023] Figure 5 is the antibacterial effect diagram of the cotton fabric dyed by the present invention. Detailed implementation manners

[0024] Example 1:

[0025] As Figure 1 shown, a preparation method of apocynum pigment dye liquor comprises the following steps:

[0026] Step S1: Take a certain amount of apocynum leaves and grind them into powder;

[0027] Step S2: Mix the powdered apocynum leaves with an ethanol aqueous solution of 60% - 80% at a weight ratio of 1:20 - 30;

[0028] Step S3: Place the mixture obtained in Step S2 in an ultrasonic cleaner with an ultrasonic power of 200W - 250W and a temperature of 80 - 90°C, and heat for 1 - 2h to obtain the apocynum pigment dye liquor.

[0029] Example 2:

[0030] As Figure 2 shown, a dyeing method for cotton fabric comprises the following steps:

[0031] Modification of cotton fabric: Cut the cotton fabric and put it into a sodium hydroxide solution with a mass concentration of 0.5% - 3% for pretreatment of the cotton fabric for 10 - 30min, then add 2% - 8% of 3-chloro-2-hydroxypropyl trimethyl ammonium chloride with a mass ratio of sodium hydroxide to 3-chloro-2-hydroxypropyl trimethyl ammonium chloride of 1:0.2 - 0.3, set the heating temperature at 70 - 80°C, continue for 30 - 60min, stir during the heating process, finally take out the modified cotton fabric, rinse it with a 1% - 3% acetic acid solution, and dry it after rinsing with cold water;

[0032] Dyeing of cotton fabric: Cut the modified cotton fabric and put it into the apocynum pigment dye liquor prepared in Example 1 for water bath heating with a bath ratio of 1:30 - 50, set the heating temperature at 80 - 90°C, and continue for 1 - 2h, stir during the heating process, and finally take out the colored cotton fabric and dry it naturally.

[0033] Control Example 1:

[0034] Set the blank control group as the untreated cotton fabric.

[0035] Experimental results: As Figure 3 shown, according to the samples in Example 1 and Comparative Example 1, the color of the cotton fabric in Example 1 is bright.

[0036] Figure 4 are the relevant data of the rubbing fastness and anti-ultraviolet effect of the cotton fabric before and after being dyed by the present invention. It can be seen that the rubbing fastness and anti-ultraviolet effect of the cotton fabric after being dyed by the present invention are greatly improved.

[0037] Experimental results: As Figure 5As shown, the antibacterial effect diagram of ordinary cotton fabric against Escherichia coli (a 0 ), the antibacterial effect diagram of ordinary cotton fabric against Staphylococcus aureus (b 0 ), the antibacterial effect diagram of dyed fabric against Escherichia coli (a 1 ), the antibacterial effect diagram of dyed fabric against Staphylococcus aureus (b 1 ). According to the samples in Example 1 and Comparative Example 1, the cotton fabric of Example 1 has better antibacterial effect.

[0038] Apocynum venetum is a precious herbaceous plant that is salt-tolerant and drought-tolerant, and is mainly distributed in Xinjiang, Gansu, Inner Mongolia and other places in China. In the present invention, Apocynum venetum pigment is extracted by ultrasonic ethanol extraction, and the flavonoid dye isolated from Apocynum venetum has good antioxidant performance, antibacterial performance and anti-ultraviolet performance. The cotton fabric dyed by the dyeing method of the present invention has bright color, showing bright yellow, no chemical reagents are added during the dyeing process, the dyeing process is green and environmentally friendly, and the dyed fabric has good rubbing color fastness and antibacterial performance. The modification and dyeing of cotton fabric in the present invention can promote the research and use of natural plant dyes on cotton fabric.

[0039] The above embodiments and drawings do not limit the product form and style of the present invention. Any appropriate changes or modifications made by those of ordinary skill in the art shall be regarded as not departing from the patent scope of the present invention.

Claims

1. A method for preparing apocynum venetum pigment dye solution, characterized in that: The steps include: Step S1: Take the Apocynum venetum leaves and grind them into fine pieces; Step S2: mixing the ground Apocynum venetum leaves and ethanol aqueous solution at a weight ratio of 1:20-30; Step S3: placing the mixed solution obtained in step S2 in an ultrasonic cleaner, with an ultrasonic power of 200W to 250W and a temperature of 80 to 90° C., heating for 1 to 2 hours to obtain apocynum pigment dye solution.

2. The method for preparing a Lophatherum pigment dye solution as claimed in claim 1, wherein: The concentration of the ethanol aqueous solution in step S2 is 60% to 80%.

3. A dyeing method, characterized in that: For cotton fabrics, the dyeing method comprises the following steps: Cotton fabric modification: put the cotton fabric into a sodium hydroxide solution with a mass concentration of 0.5% to 3% to pretreat the cotton fabric for 10 to 30 minutes, then add 2% to 8% 3-chloro-2-hydroxypropyltrimethylammonium chloride, the mass ratio of 3-chloro-2-hydroxypropyltrimethylammonium chloride to sodium hydroxide is 1:0.2 to 0.3, set the heating temperature to 70 to 80°C, continue for 30 to 60 minutes, stir during the heating process, finally take out the modified cotton fabric, rinse with 1% to 3% acetic acid solution, rinse with cold water and then dry; Cotton fabric dyeing: the modified cotton fabric is placed in the apocynum pigment dye solution prepared by the preparation method of apocynum pigment dye solution as claimed in claim 1 or 2, and heated in a water bath, with a bath ratio of 1:30-50, and the heating temperature is set to 80-90°C for 1-2 hours, and the fabric is stirred during the heating process. Finally, the colored cotton fabric is taken out and dried naturally.

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