High color fastness turmeric dyed antibacterial yarn and preparation method thereof

Abstract

The application belongs to the technical field of yarns, and particularly relates to high-color-fastness turmeric-dyed antibacterial yarn and a preparation method thereof. The preparation method of the high-color-fastness turmeric-dyed antibacterial yarn comprises the following steps: S1, uniformly stirring hydrochloric acid dopamine, Tris-HCl buffer solution and yarn, and performing self-polymerization reaction to obtain polydopamine modified yarn; S2, uniformly stirring the polydopamine modified yarn in a magnesium chloride solution to obtain a magnesium-polydopamine modified yarn solution, and filtering, washing and drying the magnesium-polydopamine modified yarn solution to obtain the magnesium-polydopamine modified yarn; and S3, fully dissolving curcumin in ethanol, adding the magnesium-polydopamine modified yarn into the ethanol, and uniformly mixing to obtain curcumin-magnesium-polydopamine modified yarn. The yarn can realize efficient antibacterial effect and has high color fastness.

Description

Technical Field

[0001] This invention belongs to the field of yarn technology, specifically relating to a high color fastness turmeric-dyed antibacterial yarn and its preparation method. Background Technology

[0002] Yarn is an important raw material for my country's textile industry. When yarn is used to make spring and summer clothing fabrics, it has insufficient antibacterial properties. Silver antibacterial agents can usually be used to improve the antibacterial properties of yarn.

[0003] Wastewater discharged from chemical dyeing and printing has caused serious damage to the ecological environment. Turmeric dye is a natural plant dye, the main component of which is curcumin, which has antibacterial properties. However, turmeric dye has a small molecular weight and low color fastness. Its wash and rubbing color fastness is generally no more than grade 3, which is difficult to meet people's daily use needs. Moreover, its antibacterial properties are limited, which restricts its application.

[0004] Therefore, there is an urgent need for a high-colorfastness turmeric-dyed antibacterial yarn. By designing the antibacterial components, the interfacial interaction between curcumin and yarn can be improved, achieving high colorfastness and good antibacterial properties. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the present invention aims to provide a high-colorfastness turmeric-dyed antibacterial yarn and its preparation method. The invention first prepares a polydopamine solution-modified yarn, then mixes it evenly with a magnesium chloride solution, filters it using a nylon filter cloth and a glass funnel, washes and dries it to obtain a magnesium-polydopamine modified yarn. Finally, curcumin is added and mixed evenly to obtain a curcumin-magnesium-polydopamine modified yarn. After washing, it is dried in an oven to obtain a high-colorfastness turmeric-dyed antibacterial yarn. The yarn achieves high colorfastness and effectively improves the antibacterial rate.

[0006] In a first aspect, the present invention provides a method for preparing a high-colorfastness turmeric-dyed antibacterial yarn, comprising the following steps: S1. First, dissolve Tris powder in ultrapure water to obtain a weak alkaline solution. Then, add dilute HCl dropwise to adjust the pH to 8.5. Prepare a Tris-HCl buffer solution. Mix dopamine hydrochloride with the Tris-HCl buffer solution and yarn evenly to carry out a self-polymerization reaction and obtain polydopamine modified yarn. S2. Add the polydopamine modified yarn to the magnesium chloride solution and stir evenly. Filter the solution using a nylon filter cloth and a glass funnel. Wash the yarn three times with deionized water at room temperature, then wash it once with ethanol, and finally dry it to obtain magnesium-polydopamine modified yarn. S3. Dissolve curcumin in ethanol, then add magnesium-polydopamine modified yarn and mix well to obtain curcumin-magnesium-polydopamine modified yarn. Wash with anhydrous ethanol and deionized water alternately, and then dry in an oven to obtain high color fastness turmeric-dyed antibacterial yarn.

[0007] As a preferred embodiment of the present invention, the concentration of the Tris-HCl buffer solution in S1 is 1.2 g / L, and the ratio of dopamine hydrochloride to Tris-HCl buffer solution is (20-50) g: (30-90) L.

[0008] As a preferred embodiment of the present invention, the ratio of magnesium chloride solution to polydopamine modified yarn in S2 is (40-50) mL:(5-10) g.

[0009] As a preferred embodiment of the present invention, the ratio of curcumin to ethanol in S3 is (20-110)g:(10-50)L.

[0010] As a preferred technical solution of the present invention, the preparation method of the high color fastness turmeric-dyed antibacterial yarn is as follows: the yarn is modified with polydopamine, and then reacted with magnesium ions to prepare magnesium-polydopamine modified yarn. The magnesium-polydopamine modified yarn is complexed with curcumin to obtain curcumin-magnesium-polydopamine modified yarn. The curcumin-magnesium-polydopamine modified yarn is washed and dried to obtain high color fastness turmeric-dyed antibacterial yarn. Polydopamine has abundant hydroxyl and phenolic groups, which interact with the hydroxyl groups on the yarn to form a simple and ordered intermediate. Polydopamine is physically adsorbed on the surface of the yarn, and the catechol structure in polydopamine has a complexing effect with magnesium ions. In addition, the phenolic hydroxyl groups on curcumin also have a complexing effect with magnesium ions.

[0011] As a preferred embodiment of the present invention, the stirring speed in S1 is 50~100r / min, the stirring time is 6~24h, and the concentration of the Tris-HCl buffer solution is 1.2g / L.

[0012] As a preferred embodiment of the present invention, the concentration of magnesium chloride solution in S2 is 9.5 g / L, the stirring speed is 50~120 r / min, and the stirring time is 20~60 min.

[0013] As a preferred embodiment of the present invention, the stirring temperature in step S2 is 40~60℃.

[0014] As a preferred embodiment of the present invention, the mesh size of the nylon filter cloth in S2 is 100-200 mesh.

[0015] As a preferred embodiment of the present invention, in step S2, each washing and soaking process lasts 5-10 minutes, and the drying conditions are 40-60℃ forced-air drying for 2-4 hours.

[0016] As a preferred embodiment of the present invention, the mixing temperature in step S3 is 50~70℃.

[0017] As a preferred embodiment of the present invention, the oven temperature in step S3 is 40~60℃ and the drying time is 2~4h.

[0018] A second aspect of the present invention provides a high color fastness turmeric-dyed antibacterial yarn prepared by the preparation method described in the first aspect.

[0019] Compared with the prior art, the present invention has the following beneficial effects: (1) The high color fastness turmeric-dyed antibacterial yarn of the present invention has polydopamine forming a uniform coating on the yarn surface, which enhances the binding force between the fiber and curcumin, reduces color fading during washing, and increases soap fastness.

[0020] (2) The high color fastness turmeric-dyed antibacterial yarn of the present invention, Mg² + It forms a stable chelate with the phenolic hydroxyl group of PDA and the β-diketone structure of curcumin, which significantly improves sweat fastness.

[0021] (3) The high color fastness turmeric-dyed antibacterial yarn of the present invention, the polydopamine modified yarn and curcumin are complexed with magnesium ions to form a whole. Curcumin and magnesium ions have a synergistic effect to improve the antibacterial rate. The phenolic hydroxyl and carbonyl groups of curcumin are combined with the phenolic hydroxyl, amino and imino groups of polydopamine through hydrogen bonds. Both contain benzene rings and conjugated structures to form Π-Π stacking, which will ensure that the antibacterial yarn can achieve high color fastness. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the preparation process of the antibacterial yarn material in Embodiment 1 of the present invention.

[0024] Figure 2 This is a SEM image of the antibacterial yarn material in Example 1 of the present invention. Detailed Implementation

[0025] To facilitate understanding of the present invention, the following embodiments are provided. Those skilled in the art should understand that these embodiments are merely illustrative and should not be construed as limiting the scope of the invention.

[0026] The sources of some components in the examples and comparative examples are as follows: Dopamine hydrochloride, CAS No. 62-31-7, purchased from Nantong Zhonghe Chemical New Materials Co., Ltd. Tris-HCl buffer solution, CAS No. 77-86-1, was purchased from Nantong Zhonghe Chemical New Materials Co., Ltd. Magnesium chloride solution, CAS No. 14989-29-8, was purchased from Shanghai Maclean Biochemical Technology Co., Ltd. Curcumin, CAS No. 458-37-7, was purchased from Shanghai Maclean Biochemical Technology Co., Ltd. Ethanol, CAS No. 64-17-5, was purchased from Shanghai Maclean Biochemical Technology Co., Ltd. Example

[0027] This embodiment provides a method for preparing high color fastness turmeric-dyed antibacterial yarn, including the following steps: S1. First, dissolve Tris powder in ultrapure water to obtain a weak alkaline solution. Then, adjust the pH to 8.5 by adding dilute HCl dropwise. Prepare a Tris-HCl buffer solution. Mix 20g of dopamine hydrochloride with 30L of Tris-HCl buffer solution with a concentration of 1.2g / L and the yarn evenly to carry out a self-polymerization reaction. The stirring speed is 50r / min and the stirring time is 6h to obtain polydopamine modified yarn. S2. Add 5g of polydopamine modified yarn to 40mL of magnesium chloride solution with a concentration of 9.5g / L and stir evenly. The stirring speed is 50r / min, the stirring time is 30min, and the stirring temperature is 40℃ to obtain magnesium-polydopamine modified yarn solution. Select 100 mesh nylon filter cloth and filter it with nylon filter cloth and glass funnel. Under room temperature conditions, wash it three times with deionized water, and then wash it once with ethanol. Each wash is soaked for 5 minutes. Finally, dry it under the drying conditions of 40℃ forced air drying for 2 hours to obtain magnesium-polydopamine modified yarn. S3. Dissolve 20g of curcumin in 10L of ethanol, then add 40g of magnesium-polydopamine modified yarn and mix well at 50℃ for 30min to obtain curcumin-magnesium-polydopamine modified yarn. Wash the yarn three times alternately with anhydrous ethanol and deionized water, and then dry it in an oven at 40℃ for 2h to obtain high color fastness turmeric-dyed antibacterial yarn. Example

[0028] This embodiment provides a method for preparing high color fastness turmeric-dyed antibacterial yarn, including the following steps: S1. First, dissolve Tris powder in ultrapure water to obtain a weak alkaline solution. Then, adjust the pH to 8.5 by adding dilute HCl dropwise. Prepare a Tris-HCl buffer solution. Mix 25g of dopamine hydrochloride with 35L of Tris-HCl buffer solution with a concentration of 1.2g / L and the yarn. Stir at 80r / min for 8h to obtain polydopamine modified yarn. S2. Add 6g of polydopamine modified yarn to 42mL of magnesium chloride solution with a concentration of 9.5g / L and stir evenly. The stirring speed is 80r / min, the stirring time is 40min, and the stirring temperature is 50℃ to obtain magnesium-polydopamine modified yarn solution. Select 120 mesh nylon filter cloth and filter it with nylon filter cloth and glass funnel. Under room temperature conditions, wash three times with deionized water, and then wash once with ethanol. Each wash is soaked for 6 minutes. Finally, dry it under the drying conditions of 45℃ forced air drying for 2.5 hours to obtain magnesium-polydopamine modified yarn. S3. Dissolve 40g of curcumin in 20L of ethanol, then add 50g of magnesium-polydopamine modified yarn and mix well at 55℃ for 40 minutes to obtain curcumin-magnesium-polydopamine modified yarn. Wash the yarn four times alternately with anhydrous ethanol and deionized water, and then dry it in an oven at 50℃ for 2.5 hours to obtain high color fastness turmeric-dyed antibacterial yarn. Example

[0029] This embodiment provides a method for preparing high color fastness turmeric-dyed antibacterial yarn, including the following steps: S1. First, dissolve Tris powder in ultrapure water to obtain a weak alkaline solution. Then, adjust the pH to 8.5 by adding dilute HCl dropwise. Prepare a Tris-HCl buffer solution. Mix 30g of dopamine hydrochloride with 60L of Tris-HCl buffer solution with a concentration of 1.2g / L and the yarn. Stir at 90r / min for 14h to obtain polydopamine modified yarn. S2. Add 8g of polydopamine modified yarn to 45mL of magnesium chloride solution with a concentration of 9.5g / L and stir evenly. The stirring speed is 100r / min, the stirring time is 50min, and the stirring temperature is 50℃ to obtain magnesium-polydopamine modified yarn solution. Select 150 mesh nylon filter cloth and filter it with nylon filter cloth and glass funnel. At room temperature, wash it three times with deionized water, and then wash it once with ethanol. Each wash is soaked for 8 minutes. Finally, dry it under the condition of 50℃ forced air drying for 3 hours to obtain magnesium-polydopamine modified yarn. S3. Dissolve 70g of curcumin in 40L of ethanol, then add 60g of magnesium-polydopamine modified yarn and mix evenly at 60℃ for 60min to obtain curcumin-magnesium-polydopamine modified yarn. Wash the yarn 4 times alternately with anhydrous ethanol and deionized water, and then dry it in an oven at 50℃ for 3h to obtain high color fastness turmeric-dyed antibacterial yarn. Example

[0030] This embodiment provides a method for preparing high color fastness turmeric-dyed antibacterial yarn, including the following steps: S1. First, dissolve Tris powder in ultrapure water to obtain a weak alkaline solution. Then, adjust the pH to 8.5 by adding dilute HCl dropwise. Prepare a Tris-HCl buffer solution. Mix 50g of dopamine hydrochloride with 100L of Tris-HCl buffer solution with a concentration of 1.2g / L and carry out a self-polymerization reaction to obtain a polydopamine solution. Add the yarn to the polydopamine solution and stir evenly at a stirring speed of 100r / min for 24h to obtain polydopamine modified yarn. S2. Add 10g of polydopamine modified yarn to 50mL of magnesium chloride solution with a concentration of 9.5g / L and stir evenly. The stirring speed is 120r / min, the stirring time is 60min, and the stirring temperature is 60℃ to obtain magnesium-polydopamine modified yarn solution. Select 200 mesh nylon filter cloth and filter it with nylon filter cloth and glass funnel. Under room temperature conditions, wash it three times with deionized water, and then wash it once with ethanol. Each wash is soaked for 10 minutes. Finally, dry it under the drying conditions of 60℃ forced air drying for 4 hours to obtain magnesium-polydopamine modified yarn. S3. Dissolve 110g of curcumin in 50L of ethanol, then add 80g of magnesium-polydopamine modified yarn and mix evenly at 70℃ for 70min to obtain curcumin-magnesium-polydopamine modified yarn. Wash the yarn 5 times alternately with anhydrous ethanol and deionized water, and then dry it in an oven at 60℃ for 4h to obtain high color fastness turmeric-dyed antibacterial yarn.

[0031] Comparative Example 1 This embodiment provides a method for preparing high color fastness turmeric-dyed antibacterial yarn, including the following steps: S1. First, dissolve Tris powder in ultrapure water to obtain a weak alkaline solution. Then, adjust the pH to 8.5 by adding dilute HCl dropwise. Prepare a Tris-HCl buffer solution. Mix 20g of dopamine hydrochloride with 30L of Tris-HCl buffer solution with a concentration of 1.2g / L and the yarn evenly to carry out a self-polymerization reaction. The stirring speed is 50r / min and the stirring time is 6h to obtain polydopamine modified yarn. S2. Dissolve 20g of curcumin in 10L of ethanol, then add polydopamine-modified yarn and mix well. The mixing temperature is 50℃ and the mixing time is 30min. Wash the yarn three times alternately with anhydrous ethanol and deionized water, and then dry it in an oven at 40℃ for 2h to obtain high color fastness turmeric-dyed antibacterial yarn.

[0032] Comparative Example 2 This embodiment provides a method for preparing high color fastness turmeric-dyed antibacterial yarn, including the following steps: S1. Add 5g of yarn to 40mL of magnesium chloride solution with a concentration of 9.5g / L and stir evenly. The stirring speed is 50r / min, the stirring time is 30min, and the stirring temperature is 40℃. Filter the yarn using nylon filter cloth and glass funnel. Select 100 mesh nylon filter cloth. Wash the yarn three times with deionized water at room temperature, and then wash it once with ethanol. Soak the yarn for 5 minutes each time. Finally, dry the yarn at 40℃ with forced air drying for 2 hours to obtain magnesium modified yarn. S2. Dissolve 20g of curcumin in 10L of ethanol, then add 40g of magnesium-modified yarn and mix well at 50℃ for 30 minutes to obtain curcumin-magnesium modified yarn. Wash the yarn three times with anhydrous ethanol and deionized water alternately, and then dry it in an oven at 40℃ for 2 hours to obtain high color fastness turmeric-dyed antibacterial yarn.

[0033] The properties of the yarns provided in the above embodiments and comparative examples were tested. The method for determining the antibacterial rate was as follows: the antibacterial rate of silk fabrics against Escherichia coli and Staphylococcus aureus was tested according to GB / T 20944.3-2008 "Evaluation of antibacterial properties of textiles - Part 3: Oscillation method".

[0034] Color fastness testing of the yarn: 1. Color fastness to washing: GB / T 26382-2024 "Combed Wool Fabrics" standard; 2. Wash fastness: GB / T 26382-2011 "Combed Wool Fabrics" standard; 3. Dry and wet rubbing fastness: GB / T 26382-2011 "Combed Wool Fabrics" standard; 4. Perspiration fastness: GB / T26382-2011 "Combed Wool Fabrics" standard.

[0035] The performance test data above are shown in Table 1.

[0036] Table 1 Performance Test Results Example 1 96 3 4 3 3 4 Example 2 97 3 4 4 3 4 Example 3 98 4 4 4 4 4 Example 4 99 4 4 4 4 4 Comparative Example 1 91 2 2 2 1 2 Comparative Example 2 90 1 1 1 1 1 As described above, the yarn of the present invention is first modified with polydopamine, and then reacted with magnesium ions to prepare magnesium-polydopamine modified yarn. The magnesium-polydopamine modified yarn is then complexed with curcumin to obtain curcumin-magnesium-polydopamine modified yarn. The curcumin-magnesium-polydopamine modified yarn is then washed and dried to obtain high-colorfastness turmeric-dyed antibacterial yarn (Examples 1-4). Comparative Example 1, compared to Example 1, did not introduce magnesium ions; Comparative Example 2, compared to Example 1, did not introduce polydopamine, and both the antibacterial rate and colorfastness decreased.

Claims

1. A method for preparing a high-colorfastness turmeric-dyed antibacterial yarn, characterized in that, The yarn is modified with polydopamine and then reacted with magnesium ions to prepare magnesium-polydopamine modified yarn. The magnesium-polydopamine modified yarn is complexed with curcumin to obtain curcumin-magnesium-polydopamine modified yarn. The curcumin-magnesium-polydopamine modified yarn is then washed and dried to obtain high color fastness turmeric-dyed antibacterial yarn.

2. The method for preparing a high color fastness turmeric-dyed antibacterial yarn according to claim 1, characterized in that, Includes the following steps: S1. First, dissolve Tris powder in ultrapure water to obtain a weak alkaline solution. Then, add dilute HCl dropwise to adjust the pH to 8.

5. Prepare a Tris-HCl buffer solution. Mix dopamine hydrochloride with the Tris-HCl buffer solution and yarn evenly. Carry out a self-polymerization reaction at room temperature to obtain polydopamine modified yarn. S2. Add the polydopamine modified yarn to the magnesium chloride solution and stir evenly. Filter the solution using a nylon filter cloth and a glass funnel. Wash the yarn three times with deionized water at room temperature, then wash it once with ethanol, and finally dry it to obtain magnesium-polydopamine modified yarn. S3. Dissolve curcumin in ethanol, then add magnesium-polydopamine modified yarn and mix well to obtain curcumin-magnesium-polydopamine modified yarn. Wash with anhydrous ethanol and deionized water alternately, and then dry in an oven to obtain high color fastness turmeric-dyed antibacterial yarn.

3. The method for preparing a high color fastness turmeric-dyed antibacterial yarn according to claim 2, characterized in that, The stirring speed in S1 is 50-100 r / min, the stirring time is 6-24 h, the concentration of Tris-HCl buffer solution is 1.2 g / L, and the ratio of dopamine hydrochloride to Tris-HCl buffer solution is (20-50) g: (30-90) L.

4. The method for preparing a high color fastness turmeric-dyed antibacterial yarn according to claim 2, characterized in that, The concentration of magnesium chloride solution in S2 is 9.5 g / L, the ratio of magnesium chloride solution to polydopamine modified yarn is (40-50) mL:(5-10) g, the stirring speed is 50~120 r / min, and the stirring time is 20~60 min.

5. The method for preparing a high color fastness turmeric-dyed antibacterial yarn according to claim 2, characterized in that, The stirring temperature in S2 is 40~60℃.

6. The method for preparing a high color fastness turmeric-dyed antibacterial yarn according to claim 2, characterized in that, The nylon filter cloth in S2 has a mesh size of 100-200.

7. The method for preparing a high color fastness turmeric-dyed antibacterial yarn according to claim 2, characterized in that, In step S2, each washing process involves soaking for 5-10 minutes, followed by drying at 40-60℃ with forced air for 2-4 hours.

8. The method for preparing a high color fastness turmeric-dyed antibacterial yarn according to claim 2, characterized in that, The ratio of curcumin to ethanol in S3 is (20-110)g:(10-50)L, the mixing temperature is 50~70℃, and the mixing time is 30~70min.

9. The method for preparing a high color fastness turmeric-dyed antibacterial yarn according to claim 2, characterized in that, The oven temperature in S3 is 40~60℃, and the drying time is 2~4h.

10. A high-colorfastness turmeric-dyed antibacterial yarn, characterized in that, It is prepared by the preparation method according to any one of claims 1 to 9.

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