A fabric with antibacterial function

Abstract

The present invention discloses a fabric with antibacterial function. It belongs to the technical field of functional fabrics and is obtained by blending polyester fiber, lyocell fiber and linen fiber. The mass ratio of the three is 100:55 - 65:20 - 30. Among them, the polyester fiber is prepared by melt spinning from PET chips and additives; the mass ratio of PET chips to additives is 50:3 - 5. The fabric of the present invention is blended from polyester fiber, lyocell fiber and linen fiber. Lyocell fiber and linen fiber can endow the fabric with better comfort and breathability. Due to the addition of additives in the polyester fiber, it has a high antibacterial rate against Escherichia coli, Staphylococcus aureus and Candida albicans, and the antibacterial effect is still good after multiple washings, with a persistent and stable antibacterial effect, having important application significance.

Description

Technical Field

[0001] The present invention belongs to the technical field of functional fabrics, and specifically relates to a fabric with antibacterial function. Background Art

[0002] Currently, commonly used antibacterial fabrics are usually treated with organic antibacterial agents, inorganic antibacterial agents, and natural antibacterial substances to obtain antibacterial effects. Among them, the aseptic antibacterial agent is expensive, easily oxidized, resulting in a decline in antibacterial performance, and easy to discolor, which limits its wide application. Although natural antibacterial substances have good safety, they also have the problem of poor antibacterial persistence. Organic antibacterial agents have a fast bactericidal speed, obvious effects, and good stability. Among them, quaternary phosphonium salts have developed rapidly in recent years, but the antibacterial ability of a single group is limited, and after long-term use or multiple washes, the antibacterial performance is severely reduced. Summary of the Invention

[0003] The purpose of the present invention is to overcome the defects of the prior art and provide a fabric with antibacterial function.

[0004] The purpose of the present invention can be achieved by the following technical solutions:

[0005] A fabric with antibacterial function is obtained by blending polyester fiber, lyocell fiber, and linen fiber, and the mass ratio of the three is 100:55 - 65:20 - 30.

[0006] Further, the polyester fiber is prepared by melt spinning PET chips and additives; the mass ratio of PET chips to additives is 50:3 - 5.

[0007] Further, the additive is prepared by the following steps:

[0008] S1. Dissolve triphenylphosphine (PPh3) in ethanol, slowly add 2-bromoethanol dropwise, and then heat to 45°C for reaction for 1 h. After the reaction is completed, vacuum dry at 80°C to obtain intermediate 1; the dosage ratio of triphenylphosphine, ethanol, and 2-bromoethanol is 10 g:100 mL:4.8 g;

[0009] Triphenylphosphine reacts with the -Br of 2-bromoethanol to obtain intermediate 1; the specific reaction process is as follows:

[0010]

[0011] S2. Add intermediate 1 and ruthenium(III) chloride into acetonitrile, slowly dropwise add 30% hydrogen peroxide solution, react for another 2 h. After the reaction is completed, add sodium thiosulfate to quench the reaction. Filter the reaction solution by suction, collect the filtrate and rotary evaporate it under reduced pressure to obtain intermediate 2. The dosage ratio of intermediate 1, ruthenium(III) chloride, acetonitrile, 30% hydrogen peroxide solution, and sodium thiosulfate is 10 g:0.14 g:100 mL:7.4 g:5 g;

[0012] The hydroxyl group on intermediate 1 undergoes catalytic oxidation with hydrogen peroxide under the catalysis of ruthenium(III) chloride to obtain intermediate 2. The specific reaction process is as follows:

[0013]

[0014] S3. Add 8-hydroxy-6-aminoquinoline and intermediate 2 into ethanol, reflux under heating for 4 h. After the reaction is completed, rotary evaporate under reduced pressure to remove the solvent to obtain the auxiliary agent. The dosage ratio of 8-hydroxy-6-aminoquinoline, intermediate 2, and ethanol is 5.25 g:10 g:100 mL;

[0015] The amino group on 8-hydroxy-6-aminoquinoline and the aldehyde group on intermediate 2 undergo a condensation reaction to form a Schiff base, obtaining the auxiliary agent. The specific reaction process is as follows:

[0016]

[0017] The auxiliary agent contains a quaternary phosphonium salt functional group, in which the positively charged phosphonium ion adsorbs on the surface of the bacterial cells, can interact with the negatively charged cell membrane of the bacteria, penetrate the cell wall, combine with the cell membrane, destroy the surface structure of the cell, cause the substances inside the cell to flow out, and the respiratory function of the bacterial cells stops, resulting in cell death.

[0018] In addition, the imino group of the Schiff base introduced by the condensation of the auxiliary agent molecule can improve the biological activity of the auxiliary agent and enhance the antibacterial effect of the auxiliary agent. The large molecular skeleton of the quinoline ring can provide a higher positive charge density to promote the interaction with the negatively charged bacterial surface and more effectively damage the cell membrane. Among them, the quinoline ring will increase its lipophilicity, enabling its movement on the lipid barrier to be faster. At the same time, the 8-hydroxyquinoline (8HQ) skeleton can reduce the water solubility of the quaternary phosphonium salt functional group and avoid the decline of the antibacterial function of the fabric after multiple washes.

[0019] Advantages of the present invention:

[0020] The fabric of the present invention is made by blending polyester fiber, lyocell fiber and linen fiber. Lyocell fiber and linen fiber can endow the fabric with better comfort and breathability. In the polyester fiber, due to the addition of an additive, the quaternary phosphonium salt functional group in the additive can damage the surface structure of cells, having a good antibacterial effect. Introducing the imino group of Schiff base and the 8-hydroxyquinoline (8HQ) skeleton can improve the biological activity of the additive, further enhancing the antibacterial effect of the additive, and reducing the water solubility of the additive to avoid the decline of the antibacterial function of the fabric after multiple washings. Detailed implementation mode

[0021] The following will combine 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 a part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0022] Embodiment 1

[0023] Preparation of additive

[0024] S1. Dissolve 10 g of triphenylphosphine (PPh3) in 100 mL of ethanol, slowly add dropwise 4.8 g of 2-bromoethanol, and then heat to 45 °C for reaction for 1 h. After the reaction is completed, vacuum dry at 80 °C to obtain intermediate 1;

[0025] S2. Add 10 g of intermediate 1 and 0.14 g of ruthenium trichloride to 100 mL of acetonitrile, slowly add dropwise 7.4 g of 30% hydrogen peroxide solution, react for another 2 h, add 5 g of sodium thiosulfate to quench the reaction after the reaction is completed, filter the reaction solution by suction, and collect the filtrate for rotary evaporation under reduced pressure to obtain intermediate 2;

[0026] S3. Add 5.25 g of 8-hydroxy-6-aminoquinoline and 10 g of intermediate 2 to 100 mL of ethanol, heat to reflux for 4 h, and remove the solvent by rotary evaporation under reduced pressure after the reaction is completed to obtain the additive.

[0027] Embodiment 2

[0028] Preparation of additive

[0029] S1. Dissolve 20 g of triphenylphosphine (PPh3) in 200 mL of ethanol, slowly add dropwise 9.6 g of 2-bromoethanol, and then heat to 45 °C for reaction for 1 h. After the reaction is completed, vacuum dry at 80 °C to obtain intermediate 1;

[0030] S2. Add 20 g of Intermediate 1 and 0.28 g of ruthenium trichloride to 200 mL of acetonitrile. Slowly add 14.8 g of 30% hydrogen peroxide solution dropwise, and then react for 2 h. After the reaction is completed, add 10 g of sodium thiosulfate to quench the reaction. Filter the reaction solution by suction, and collect the filtrate for rotary evaporation under reduced pressure to obtain Intermediate 2;

[0031] S3. Add 10.5 g of 8-hydroxy-6-aminoquinoline and 20 g of Intermediate 2 to 200 mL of ethanol, heat under reflux for 4 h. After the reaction is completed, remove the solvent by rotary evaporation under reduced pressure to obtain the additive.

[0032] Example 3

[0033] Prepare polyester fibers by melt spinning 500 g of PET chips and 30 g of the additive prepared in Example 2.

[0034] Example 4

[0035] Prepare polyester fibers by melt spinning 500 g of PET chips and 40 g of the additive prepared in Example 3.

[0036] Example 5

[0037] Prepare polyester fibers by melt spinning 500 g of PET chips and 50 g of the additive prepared in Example 2.

[0038] Example 6

[0039] A fabric with antibacterial function is obtained by blending the polyester fibers, lyocell fibers, and linen fibers prepared in Example 3, and the mass ratio of the three is 100:55:20;

[0040] Combine the fibers on a drawframe to make a sliver, perform drafting and twisting on a roving frame, and finally perform further drafting and twisting on a spinning frame to make a blended yarn; then weave the blended yarn into a fabric by the weft knitting method of a circular knitting machine.

[0041] Example 7

[0042] A fabric with antibacterial function is obtained by blending the polyester fibers, lyocell fibers, and linen fibers prepared in Example 4, and the mass ratio of the three is 100:60:25;

[0043] Combine the fibers on a drawframe to make a sliver, perform drafting and twisting on a roving frame, and finally perform further drafting and twisting on a spinning frame to make a blended yarn; then weave the blended yarn into a fabric by the weft knitting method of a circular knitting machine.

[0044] Example 8

[0045] A fabric with antibacterial function is obtained by blending polyester fiber, lyocell fiber and linen fiber prepared in Example 5, and the mass ratio of the three is 100:65:30;

[0046] Merge the fibers on a drawing frame to make a sliver, perform drafting and twisting on a roving frame, and finally perform further drafting and twisting on a spinning frame to make a blended yarn; then use the weft knitting method of a circular knitting machine to knit the blended yarn into a fabric.

[0047] For the fabrics obtained in Examples 6-8, cut them into test samples and conduct the following performance tests:

[0048] Adopt the national standard GB / T20944.3-2008 "Evaluation of antibacterial properties of textiles - Part 3: Oscillation method" for quantitative antibacterial test, and use the washing method of a color fastness to washing tester to test the antibacterial rate of the fabric after 30 washes.

[0049] The measured results are shown in the following table:

[0050] Antibacterial rate test table after 30 washes (%)

[0051]

[0052]

[0053] It can be seen from the data in the above table that the fabric obtained by the present invention has a high antibacterial rate against Escherichia coli, Staphylococcus aureus and Candida albicans, and has a persistent and stable antibacterial effect.

[0054] In the description of the specification, the description with reference to terms such as "an embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0055] The above content is only an example and illustration of the present invention. Those skilled in the art of the present technology make various modifications or supplements to the described specific embodiments or use similar methods to replace them. As long as they do not deviate from the invention or exceed the scope defined by the claims of the present invention, they should fall within the protection scope of the present invention.

Claims

1. A fabric with antibacterial function, which is obtained by blending polyester fiber, lyocell fiber and linen fiber, and is characterized in that, The polyester fiber is prepared by melt spinning from PET chips and additives; Among them, the additive is prepared by the following steps: S1. Dissolve triphenylphosphine in ethanol, slowly add 2-bromoethanol dropwise, then heat to 45 °C and react for 1 h. After the reaction is completed, dry in vacuum at 80 °C to obtain intermediate 1; S2. Add intermediate 1 and ruthenium trichloride to acetonitrile, slowly add 30% hydrogen peroxide solution dropwise, react for another 2 h. After the reaction is completed, add sodium thiosulfate to quench the reaction, filter the reaction solution by suction, and collect the filtrate for rotary evaporation under reduced pressure to obtain intermediate 2; S3. Add 8-hydroxy-6-aminoquinoline and intermediate 2 to ethanol, reflux under heating for 4 h. After the reaction is completed, remove the solvent by rotary evaporation under reduced pressure to obtain the additive, and the molecular structure of the additive is shown as follows:

2. The antibacterial fabric according to claim 1, wherein In step S1, the dosage ratio of triphenylphosphine, ethanol, and 2-bromoethanol is 10 g: 100 mL: 4.8 g.

3. The fabric with antibacterial function according to claim 1, wherein, In step S2, the dosage ratio of intermediate 1, ruthenium trichloride, acetonitrile, 30% hydrogen peroxide solution, and sodium thiosulfate is 10 g: 0.14 g: 100 mL: 7.4 g: 5 g.

4. The fabric with antibacterial function according to claim 1, characterized in that, In step S3, the dosage ratio of 8-hydroxy-6-aminoquinoline, intermediate 2, and ethanol is 5.25 g: 10 g: 100 mL.

5. A fabric with antibacterial function according to claim 1, characterized in that, It is obtained by blending polyester fiber, lyocell fiber, and linen fiber, and the mass ratio of the three is 100: 55-65: 20-30.

6. The fabric with antibacterial function according to claim 1 is characterized in that, The mass ratio of PET chips and additives in the polyester fiber is 50: 3-5.

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