Fabric antibacterial finishing agent containing flavonoid compounds and preparation method of fabric antibacterial finishing agent

Abstract

The invention relates to the technical field of finishing agents, in particular to a fabric antibacterial finishing agent containing flavonoid compounds and a preparation method of the fabric antibacterial finishing agent. Licoflavone and cacumen biotae flavone are added into the antibacterial finishing agent, flavone has a good inhibitory activity effect on tyrosinase and can inhibit synthesis of melanin and reduce formation of color spots, and therefore the antibacterial finishing agent has a good whitening effect. Flavonoid compounds can destroy integrity of cell walls and cell membranes of microorganisms and inhibit growth of the microorganisms and have good antibacterial performance, and rutin is a natural flavonoid compound, contains a large amount of polyphenols and has excellent antibacterial performance. Chrysin is also a flavonoid compound which has an antibacterial effect and contains phenolic hydroxyl groups, and modified polyurethane is prepared from chrysin, so that the antibacterial performance of the antibacterial finishing agent is enhanced.

Description

Technical Field

[0001] The invention relates to the technical field of finishing agents, in particular to an antibacterial fabric finishing agent containing flavonoid compounds and a preparation method thereof. Background Art

[0002] In the textile industry, antimicrobial finishing agents for fabrics are widely used in various fiber products to improve their antimicrobial properties and service life. With the improvement of quality of life and health and safety requirements, especially in the fields of medical care, sportswear and daily household items, the demand for antimicrobial properties of textiles is increasing.

[0003] Flavonoids have gradually become one of the research hotspots of textile antibacterial finishing agents due to their unique chemical structure and good antioxidant and antibacterial properties. Flavonoids are widely found in natural plants, such as citrus fruits, tea, grapes, apples, etc. They have good biological activity and environmental friendliness, and are therefore regarded as natural textile antibacterial agents. Current research shows that flavonoids can not only effectively inhibit the growth of bacteria and fungi, but also reduce textile deterioration and odor problems caused by microorganisms. However, how to further improve the antibacterial effect of fabric antibacterial finishing agents containing flavonoids and improve the antibacterial rate of fabrics after washing remains a key research issue.

[0004] In order to solve the above problems and improve the antibacterial performance, the present invention provides a fabric antibacterial finishing agent containing flavonoid compounds and a preparation method thereof. Summary of the invention

[0005] The object of the present invention is to provide a fabric antibacterial finishing agent containing flavonoid compounds and a preparation method thereof, so as to solve the problems raised in the above background technology.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: A method for preparing a fabric antibacterial finishing agent containing flavonoid compounds comprises the following steps: Step 1: adding sodium hydroxide dropwise to rutin, adjusting the pH value to 10-10.5, adding silver nitrate solution and modified copper-based metal organic framework material, heating to 60-70°C, reacting for 7-8h, centrifuging, washing and drying to obtain rutin-nanosilver complex; Step 2: Take rutin-nanosilver complex, surfactant, polyhexamethylene guanidine, chitosan, polyethylene glycol, hydroxypropyl methylcellulose, betaine, polyurethane, chrysin modified polyurethane, organic solvent, and deionized water, stir for 2-3 hours, and obtain an antibacterial finishing agent.

[0007] More optimally, the antibacterial finishing agent includes the following ingredients, calculated by weight percentage: 0.5-1.5% rutin-nanosilver complex, 1-2% surfactant, 1-1.5% polyhexamethylene guanidine, 1-3% chitosan, 1-2% polyethylene glycol, 2-4% hydroxypropyl methylcellulose, 5-7% betaine, 0.5-1% polyurethane, 1-2% chrysin modified polyurethane, 0.5-1.5% glycyrrhizin, 0.5-1.5% orientalis leaf flavonoids, 5-10% organic solvent, and the balance is deionized water.

[0008] More optimally, the preparation method of the chrysin-modified polyurethane comprises the following steps: S1: Take N,N-dimethylformamide and chrysin, stir evenly to obtain a chrysin solution; S2: Take polytetrahydrofuran diol, hexamethylene diisocyanate, dibutyltin dilaurate, and N,N-dimethylformamide, heat to 60-65°C, react for 9-10 hours to obtain a polyurethane prepolymer, add 1,6-hexanediol, react at 40-45°C for 10-12 hours to obtain a polyurethane prepolymer, add chrysin solution, react at 30-35°C for 10-12 hours to obtain a chrysin-modified polyurethane.

[0009] More optimally, the preparation method of the modified copper-based metal-organic framework material is: take deionized water and amination copper-based metal-organic framework material, stir evenly, add tannic acid solution, and continue stirring for 3-4 hours to obtain the modified copper-based metal-organic framework material.

[0010] More optimally, the preparation method of the amination copper-based metal-organic framework material is: take ethanol, add the copper-based metal-organic framework material, stir evenly, add 3-aminopropyltriethoxysilane, stir at 75-80°C for 1-2h, dialyze for 11-12h, and dry to obtain the amination copper-based metal-organic framework material.

[0011] More optimally, the preparation method of the copper-based metal organic framework material is: take N, N-dimethylformamide and ethanol, stir evenly, add copper acetate monohydrate to obtain a copper acetate monohydrate solution; take trimesic acid and N, N-dimethylformamide, stir evenly to obtain a trimesic acid solution; take N, N-dimethylformamide and ethanol, stir evenly, and simultaneously drop a copper acetate monohydrate solution and a trimesic acid solution, centrifuge, wash, dry, and grind to obtain a copper-based metal organic framework material.

[0012] Preferably, the organic solvent is a mixture of ethanol and acetone, and the volume ratio of ethanol to acetone is 1:1.

[0013] More optimally, the surfactant is any one of nonylphenol polyoxyethylene ether and lauryl alcohol polyoxyethylene ether.

[0014] Compared with the prior art, the beneficial effects achieved by the present invention are: (1) The present invention adds licorice flavonoids and Platycladus orientalis leaf flavonoids to the antibacterial finishing agent. Licorice flavonoids and Platycladus orientalis leaf flavonoids are both natural plant extracts. Flavonoids have a good inhibitory activity on tyrosinase, can inhibit the synthesis of melanin, and reduce the formation of spots, so that the antibacterial finishing agent has a good whitening effect.

[0015] (2) The present invention prepares a modified copper-based metal organic framework material. The copper metal ions in the copper-based metal organic framework material will be gradually released, so it has good antibacterial properties. Flavonoid compounds can destroy the integrity of microbial cell walls and cell membranes, inhibit microbial growth, and have good antibacterial properties. Rutin is a natural flavonoid compound. Rutin contains a large amount of polyphenols and has excellent antibacterial properties. Polyphenols can also complex with metal ions.

[0016] The present invention uses tannic acid to modify the copper-based metal organic framework material. The hydroxyl group and carboxyl group in the tannic acid can react with the polyphenol group in rutin to form a chemical bond, so that the nano silver is tightly combined with the modified copper-based metal organic framework material, and the dispersibility of the modified copper-based metal organic framework material in the finishing agent is improved. The rutin-nano silver composite prepared by the present invention has a good antibacterial effect.

[0017] (3) Chrysin is also a flavonoid compound containing phenolic hydroxyl groups with antibacterial effects. A modified polyurethane was prepared using chrysin, which enhanced the antibacterial properties of the polyurethane. At the same time, it also enhanced the compatibility of rutin-nanosilver composites in antibacterial finishing agents, thereby enhancing the antibacterial properties of the antibacterial finishing agents. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. 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.

[0019] There is no particular restriction on the purchase manufacturers of the raw materials involved in the present invention, and exemplary examples include: rutin: model: B20771, which can be purchased from Shanghai Yuanye Biotechnology Co., Ltd.; polytetrahydrofuran diol: model: XK4681, which can be purchased from Hubei Xinkang Pharmaceutical Chemical Co., Ltd.; chrysin: model: S17127, which can be purchased from Shanghai Yuanye Biotechnology Co., Ltd.; polyurethane: model: Covestro 2593-1, which can be purchased from Covestro; polyethylene glycol: model: S30184, which can be purchased from Shanghai Yuanye Biotechnology Co., Ltd.

[0020] Embodiment 1: A method for preparing a fabric antibacterial finishing agent containing flavonoid compounds, comprising the following steps: Step 1: Preparation of copper-based metal-organic framework materials: Take 50 mL of N, N-dimethylformamide and 50 mL of ethanol, stir evenly, add 0.3 g of copper acetate monohydrate to obtain a copper acetate monohydrate solution; take 0.2 g of trimesic acid and 100 mL of N, N-dimethylformamide, stir evenly to obtain a trimesic acid solution; take 9 mL of N, N-dimethylformamide and 1 mL of ethanol, stir evenly, and simultaneously dropwise add a copper acetate monohydrate solution and a trimesic acid solution, centrifuge, wash, dry, and grind to obtain a copper-based metal organic framework material; Step 2: Preparation of modified copper-based metal-organic framework materials: Take 100 mL of ethanol, add 1 g of copper-based metal organic framework material, stir evenly, add 0.8 mL of 3-aminopropyltriethoxysilane, stir at 78 ° C for 1.5 h, dialyze for 11.5 h, and dry to obtain an amino copper-based metal organic framework material; Take 20 mL of deionized water and 0.2 g of amine copper-based metal-organic framework material, stir evenly, add 0.4 g of tannic acid solution with a concentration of 40 mg / mL, and continue stirring for 3.5 h to obtain a modified copper-based metal-organic framework material; Step 3: Preparation of rutin-nanosilver complex: Sodium hydroxide with a concentration of 1 mol / L was added dropwise to 5 g of rutin, the pH value was adjusted to 10.2, 50 mL of silver nitrate solution and 1.5 g of modified copper-based metal organic framework material were added, the temperature was raised to 65°C, the reaction was performed for 7.5 h, centrifuged, washed, and dried to obtain a rutin-nanosilver complex; Step 4: Preparation of chrysin-modified polyurethane: Take 5g N,N-dimethylformamide and 3g chrysin, stir evenly to obtain a chrysin solution; Take 40g of polytetrahydrofuran diol, 13.4g of hexamethylene diisocyanate, 0.2g of dibutyltin dilaurate, and 40g of N,N-dimethylformamide, heat to 63°C, react for 9.5h to obtain a polyurethane prepolymer, add 2.4g of 1,6-hexanediol, react at 42°C for 11h to obtain a polyurethane prepolymer, add chrysin solution, react at 32°C for 11h to obtain a chrysin-modified polyurethane; Step 5: Preparation of antibacterial finishing agent: Take rutin-nanosilver complex, surfactant nonylphenol polyoxyethylene ether, polyhexamethylene guanidine, chitosan, polyethylene glycol, hydroxypropyl methylcellulose, betaine, polyurethane, chrysin modified polyurethane, organic solvent, deionized water, stir for 2.5 hours, and obtain an antibacterial finishing agent; The antibacterial finishing agent comprises the following ingredients, calculated by weight percentage: 1% rutin-nanosilver complex, 1.5% surfactant nonylphenol polyoxyethylene ether, 1.2% polyhexamethylene guanidine, 2% chitosan, 1.5% polyethylene glycol, 3% hydroxypropyl methylcellulose, 6% betaine, 0.8% polyurethane, 1.5% chrysin modified polyurethane, 1% glycyrrhizin flavonoids, 1% orientalis leaf flavonoids, 7% organic solvent, and the balance is deionized water; wherein the organic solvent is a mixture of ethanol and acetone, and the volume ratio of ethanol to acetone is 1:1.

[0021] Embodiment 2: A method for preparing a fabric antibacterial finishing agent containing flavonoid compounds, comprising the following steps: Step 1: Preparation of copper-based metal-organic framework materials: Take 50 mL of N, N-dimethylformamide and 50 mL of ethanol, stir evenly, add 0.3 g of copper acetate monohydrate to obtain a copper acetate monohydrate solution; take 0.2 g of trimesic acid and 100 mL of N, N-dimethylformamide, stir evenly to obtain a trimesic acid solution; take 9 mL of N, N-dimethylformamide and 1 mL of ethanol, stir evenly, and simultaneously dropwise add a copper acetate monohydrate solution and a trimesic acid solution, centrifuge, wash, dry, and grind to obtain a copper-based metal organic framework material; Step 2: Preparation of modified copper-based metal-organic framework materials: Take 100 mL of ethanol, add 1 g of copper-based metal organic framework material, stir evenly, add 0.8 mL of 3-aminopropyltriethoxysilane, stir at 75 ° C for 1 h, dialyze for 11 h, and dry to obtain an amino copper-based metal organic framework material; Take 20 mL of deionized water and 0.2 g of amide copper-based metal-organic framework material, stir evenly, add 0.4 g of tannic acid solution with a concentration of 40 mg / mL, and continue stirring for 3 h to obtain a modified copper-based metal-organic framework material; Step 3: Preparation of rutin-nanosilver complex: Sodium hydroxide with a concentration of 1 mol / L was added dropwise to 5 g of rutin, the pH value was adjusted to 10, 50 mL of silver nitrate solution and 1.5 g of modified copper-based metal organic framework material were added, the temperature was raised to 60°C, the reaction was performed for 7 h, centrifuged, washed, and dried to obtain a rutin-nanosilver complex; Step 4: Preparation of chrysin-modified polyurethane: Take 5g N,N-dimethylformamide and 3g chrysin, stir evenly to obtain a chrysin solution; Take 40g of polytetrahydrofuran diol, 13.4g of hexamethylene diisocyanate, 0.2g of dibutyltin dilaurate, and 40g of N,N-dimethylformamide, heat to 60°C, react for 9h to obtain a polyurethane prepolymer, add 2.4g of 1,6-hexanediol, react for 10h at 40°C to obtain a polyurethane prepolymer, add chrysin solution, react for 10h at 30°C to obtain a chrysin-modified polyurethane; Step 5: Preparation of antibacterial finishing agent: Take rutin-nanosilver complex, surfactant lauryl alcohol polyoxyethylene ether, polyhexamethylene guanidine, chitosan, polyethylene glycol, hydroxypropyl methylcellulose, betaine, polyurethane, chrysin modified polyurethane, organic solvent, deionized water, stir for 2 hours to obtain an antibacterial finishing agent; The antibacterial finishing agent comprises the following ingredients, calculated by weight percentage: 0.5% rutin-nanosilver complex, 1% surfactant lauryl alcohol polyoxyethylene ether, 1% polyhexamethylene guanidine, 1% chitosan, 1% polyethylene glycol, 2% hydroxypropyl methylcellulose, 5% betaine, 0.5% polyurethane, 1% chrysin modified polyurethane, 0.5% glycyrrhizin flavonoids, 0.5% orientalis leaf flavonoids, 5% organic solvent, and the balance is deionized water; wherein the organic solvent is a mixture of ethanol and acetone, and the volume ratio of ethanol to acetone is 1:1.

[0022] Embodiment 3: A method for preparing a fabric antibacterial finishing agent containing flavonoid compounds, comprising the following steps: Step 1: Preparation of copper-based metal-organic framework materials: Take 50 mL of N, N-dimethylformamide and 50 mL of ethanol, stir evenly, add 0.3 g of copper acetate monohydrate to obtain a copper acetate monohydrate solution; take 0.2 g of trimesic acid and 100 mL of N, N-dimethylformamide, stir evenly to obtain a trimesic acid solution; take 9 mL of N, N-dimethylformamide and 1 mL of ethanol, stir evenly, and simultaneously dropwise add a copper acetate monohydrate solution and a trimesic acid solution, centrifuge, wash, dry, and grind to obtain a copper-based metal organic framework material; Step 2: Preparation of modified copper-based metal-organic framework materials: Take 100 mL of ethanol, add 1 g of copper-based metal organic framework material, stir evenly, add 0.8 mL of 3-aminopropyltriethoxysilane, stir at 80 ° C for 2 h, dialyze for 12 h, and dry to obtain an amino copper-based metal organic framework material; Take 20 mL of deionized water and 0.2 g of amide copper-based metal-organic framework material, stir evenly, add 0.4 g of tannic acid solution with a concentration of 40 mg / mL, and continue stirring for 4 h to obtain a modified copper-based metal-organic framework material; Step 3: Preparation of rutin-nanosilver complex: Sodium hydroxide with a concentration of 1 mol / L was added dropwise to 5 g of rutin, the pH value was adjusted to 10.5, 50 mL of silver nitrate solution and 1.5 g of modified copper-based metal organic framework material were added, the temperature was raised to 70°C, the reaction was performed for 8 h, centrifuged, washed, and dried to obtain a rutin-nanosilver complex; Step 4: Preparation of chrysin-modified polyurethane: Take 5g N,N-dimethylformamide and 3g chrysin, stir evenly to obtain a chrysin solution; Take 40g of polytetrahydrofuran diol, 13.4g of hexamethylene diisocyanate, 0.2g of dibutyltin dilaurate, and 40g of N,N-dimethylformamide, heat to 65°C, react for 10h to obtain a polyurethane prepolymer, add 2.4g of 1,6-hexanediol, react at 45°C for 12h to obtain a polyurethane prepolymer, add chrysin solution, react at 35°C for 12h to obtain a chrysin-modified polyurethane; Step 5: Preparation of antibacterial finishing agent: Take rutin-nanosilver complex, surfactant nonylphenol polyoxyethylene ether, polyhexamethylene guanidine, chitosan, polyethylene glycol, hydroxypropyl methylcellulose, betaine, polyurethane, chrysin modified polyurethane, organic solvent, deionized water, stir for 3 hours to obtain an antibacterial finishing agent; The antibacterial finishing agent comprises the following ingredients, calculated by weight percentage: 1.5% rutin-nanosilver complex, 2% surfactant nonylphenol polyoxyethylene ether, 1.5% polyhexamethylene guanidine, 3% chitosan, 2% polyethylene glycol, 4% hydroxypropyl methylcellulose, 7% betaine, 1% polyurethane, 2% chrysin modified polyurethane, 1.5% glycyrrhizin flavonoids, 1.5% orientalis leaf flavonoids, 10% organic solvent, and the balance is deionized water; wherein the organic solvent is a mixture of ethanol and acetone, and the volume ratio of ethanol to acetone is 1:1.

[0023] Comparative Example 1: The copper-based metal organic framework material is not modified by using tannic acid, and the rest is the same as Example 1: Step 1: Preparation of copper-based metal-organic framework materials: Take 50 mL of N, N-dimethylformamide and 50 mL of ethanol, stir evenly, add 0.3 g of copper acetate monohydrate to obtain a copper acetate monohydrate solution; take 0.2 g of trimesic acid and 100 mL of N, N-dimethylformamide, stir evenly to obtain a trimesic acid solution; take 9 mL of N, N-dimethylformamide and 1 mL of ethanol, stir evenly, and simultaneously dropwise add a copper acetate monohydrate solution and a trimesic acid solution, centrifuge, wash, dry, and grind to obtain a copper-based metal organic framework material; Step 2: Preparation of rutin-nanosilver complex: Sodium hydroxide with a concentration of 1 mol / L was added dropwise to 5 g of rutin, the pH value was adjusted to 10.2, 50 mL of silver nitrate solution and 1.5 g of copper-based metal organic framework material were added, the temperature was raised to 65°C, the reaction was performed for 7.5 h, centrifuged, washed, and dried to obtain a rutin-nanosilver complex; Step 3: Preparation of chrysin-modified polyurethane: Take 5g N,N-dimethylformamide and 3g chrysin, stir evenly to obtain a chrysin solution; Take 40g of polytetrahydrofuran diol, 13.4g of hexamethylene diisocyanate, 0.2g of dibutyltin dilaurate, and 40g of N,N-dimethylformamide, heat to 63°C, react for 9.5h to obtain a polyurethane prepolymer, add 2.4g of 1,6-hexanediol, react at 42°C for 11h to obtain a polyurethane prepolymer, add chrysin solution, react at 32°C for 11h to obtain a chrysin-modified polyurethane; Step 4: Preparation of antibacterial finishing agent: Take rutin-nanosilver complex, surfactant nonylphenol polyoxyethylene ether, polyhexamethylene guanidine, chitosan, polyethylene glycol, hydroxypropyl methylcellulose, betaine, polyurethane, chrysin modified polyurethane, organic solvent, deionized water, stir for 2.5 hours, and obtain an antibacterial finishing agent; The antibacterial finishing agent comprises the following ingredients, calculated by weight percentage: 1% rutin-nanosilver complex, 1.5% surfactant nonylphenol polyoxyethylene ether, 1.2% polyhexamethylene guanidine, 2% chitosan, 1.5% polyethylene glycol, 3% hydroxypropyl methylcellulose, 6% betaine, 0.8% polyurethane, 1.5% chrysin modified polyurethane, 1% glycyrrhizin flavonoids, 1% orientalis leaf flavonoids, 7% organic solvent, and the balance is deionized water; wherein the organic solvent is a mixture of ethanol and acetone, and the volume ratio of ethanol to acetone is 1:1.

[0024] Comparative Example 2: No modified copper-based metal organic framework material is added, and the rest is the same as Example 1: Step 1: Preparation of rutin-nanosilver complex: 1 mol / L sodium hydroxide was added dropwise to 5 g of rutin, the pH value was adjusted to 10.2, 50 mL of silver nitrate solution was added, the temperature was raised to 65°C, the reaction was performed for 7.5 h, centrifuged, washed, and dried to obtain a rutin-nanosilver complex; Step 2: Preparation of chrysin-modified polyurethane: Take 5g N,N-dimethylformamide and 3g chrysin, stir evenly to obtain a chrysin solution; Take 40g of polytetrahydrofuran diol, 13.4g of hexamethylene diisocyanate, 0.2g of dibutyltin dilaurate, and 40g of N,N-dimethylformamide, heat to 63°C, react for 9.5h to obtain a polyurethane prepolymer, add 2.4g of 1,6-hexanediol, react at 42°C for 11h to obtain a polyurethane prepolymer, add chrysin solution, react at 32°C for 11h to obtain a chrysin-modified polyurethane; Step 3: Preparation of antibacterial finishing agent: Take rutin-nanosilver complex, surfactant nonylphenol polyoxyethylene ether, polyhexamethylene guanidine, chitosan, polyethylene glycol, hydroxypropyl methylcellulose, betaine, polyurethane, chrysin modified polyurethane, organic solvent, deionized water, stir for 2.5 hours, and obtain an antibacterial finishing agent; The antibacterial finishing agent comprises the following ingredients, calculated by weight percentage: 1% rutin-nanosilver complex, 1.5% surfactant nonylphenol polyoxyethylene ether, 1.2% polyhexamethylene guanidine, 2% chitosan, 1.5% polyethylene glycol, 3% hydroxypropyl methylcellulose, 6% betaine, 0.8% polyurethane, 1.5% chrysin modified polyurethane, 1% glycyrrhizin flavonoids, 1% orientalis leaf flavonoids, 7% organic solvent, and the balance is deionized water; wherein the organic solvent is a mixture of ethanol and acetone, and the volume ratio of ethanol to acetone is 1:1.

[0025] Comparative Example 3: Chrysin-modified polyurethane is not added, and the rest is the same as Example 1: Step 1: Preparation of copper-based metal-organic framework materials: Take 50 mL of N, N-dimethylformamide and 50 mL of ethanol, stir evenly, add 0.3 g of copper acetate monohydrate to obtain a copper acetate monohydrate solution; take 0.2 g of trimesic acid and 100 mL of N, N-dimethylformamide, stir evenly to obtain a trimesic acid solution; take 9 mL of N, N-dimethylformamide and 1 mL of ethanol, stir evenly, and simultaneously dropwise add a copper acetate monohydrate solution and a trimesic acid solution, centrifuge, wash, dry, and grind to obtain a copper-based metal organic framework material; Step 2: Preparation of modified copper-based metal-organic framework materials: Take 100 mL of ethanol, add 1 g of copper-based metal organic framework material, stir evenly, add 0.8 mL of 3-aminopropyltriethoxysilane, stir at 78 ° C for 1.5 h, dialyze for 11.5 h, and dry to obtain an amino copper-based metal organic framework material; Take 20 mL of deionized water and 0.2 g of amine copper-based metal-organic framework material, stir evenly, add 0.4 g of tannic acid solution with a concentration of 40 mg / mL, and continue stirring for 3.5 h to obtain a modified copper-based metal-organic framework material; Step 3: Preparation of rutin-nanosilver complex: Sodium hydroxide with a concentration of 1 mol / L was added dropwise to 5 g of rutin, the pH value was adjusted to 10.2, 50 mL of silver nitrate solution and 1.5 g of modified copper-based metal organic framework material were added, the temperature was raised to 65°C, the reaction was performed for 7.5 h, centrifuged, washed, and dried to obtain a rutin-nanosilver complex; Step 4: Preparation of antibacterial finishing agent: Take rutin-nanosilver complex, surfactant nonylphenol polyoxyethylene ether, polyhexamethylene guanidine, chitosan, polyethylene glycol, hydroxypropyl methylcellulose, betaine, polyurethane, organic solvent, deionized water, stir for 2.5 hours to obtain an antibacterial finishing agent; The antibacterial finishing agent comprises the following ingredients, calculated by weight percentage: 1% rutin-nanosilver complex, 1.5% surfactant nonylphenol polyoxyethylene ether, 1.2% polyhexamethylene guanidine, 2% chitosan, 1.5% polyethylene glycol, 3% hydroxypropyl methylcellulose, 6% betaine, 2.3% polyurethane, 1% glycyrrhizin, 1% orientalis leaf flavonoids, 7% organic solvent, and the balance is deionized water; wherein the organic solvent is a mixture of ethanol and acetone, and the volume ratio of ethanol to acetone is 1:1.

[0026] experiment: Take 105g / m 2 The pure cotton knitted fabric was cut into six equal parts according to the specification of 100g / piece, and then immersed in the antibacterial finishing agent prepared in Examples 1-3 and Comparative Examples 1-3 for rolling, with a rolling rate of 95%. After drying and finalization, the antibacterial cloth samples were obtained. Referring to GB / T 8629-2017, a B-type stirring washing machine was used, and the washing program was 8B. The antibacterial cloth samples were washed 50 times, and the antibacterial properties of the washed antibacterial cloth samples were tested by the absorption method in FA / T 73023-2006; the breaking strength of the antibacterial cloth samples was tested, the tensile rate was 20mm / min, and the chuck spacing was 10mm. The data obtained are shown in the following table:

[0027] Conclusion: From the data in the table, it can be seen that in Comparative Example 1 of the present invention, tannic acid is not used to modify the copper-based metal organic framework material, the binding force between nanosilver and the modified copper-based metal organic framework material decreases, the loaded nanosilver decreases, and the antibacterial performance deteriorates. Comparative Example 2 does not add modified copper-based metal organic framework materials, and the antibacterial performance deteriorates. Comparative Example 3 does not add modified polyurethane, the compatibility of rutin-nanosilver composite in the antibacterial finishing agent deteriorates, the antibacterial performance of polyurethane also decreases, and the antibacterial performance of the finishing agent deteriorates. Examples 1-3 of the present invention prepare a modified copper-based metal organic framework material. The copper metal ions in the copper-based metal organic framework material will be gradually released, so it has good antibacterial performance. Tannic acid was used to modify the copper-based metal-organic framework material. The hydroxyl and carboxyl groups in the tannic acid could react with the polyphenol groups in rutin to form chemical bonds, so that the nanosilver was tightly combined with the modified copper-based metal-organic framework material. A modified polyurethane was prepared using chrysin, which enhanced the antibacterial properties of the polyurethane. At the same time, the compatibility of the rutin-nanosilver complex in the antibacterial finishing agent was enhanced, thereby enhancing the antibacterial properties of the antibacterial finishing agent.

[0028] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for preparing a fabric antibacterial finishing agent containing flavonoid compounds, Features: The following steps are involved: Step 1: adding sodium hydroxide dropwise to rutin, adjusting the pH value to 10-10.5, adding silver nitrate solution and modified copper-based metal organic framework material, heating to 60-70°C, reacting for 7-8h, centrifuging, washing and drying to obtain rutin-nanosilver complex; Step 2: Take rutin-nanosilver complex, surfactant, polyhexamethylene guanidine, chitosan, polyethylene glycol, hydroxypropyl methylcellulose, betaine, polyurethane, chrysin modified polyurethane, organic solvent, and deionized water, stir for 2-3 hours, and obtain an antibacterial finishing agent.

2. A method for preparing a fabric antibacterial finishing agent containing flavonoid compounds according to claim 1, Features: The antibacterial finishing agent comprises the following components, calculated by weight percentage: 0.5-1.5% rutin-nanosilver complex, 1-2% surfactant, 1-1.5% polyhexamethylene guanidine, 1-3% chitosan, 1-2% polyethylene glycol, 2-4% hydroxypropyl methylcellulose, 5-7% betaine, 0.5-1% polyurethane, 1-2% chrysin modified polyurethane, 0.5-1.5% glycyrrhizin flavonoids, 0.5-1.5% orientalis leaf flavonoids, 5-10% organic solvent, and the balance is deionized water.

3. A method for preparing a fabric antibacterial finishing agent containing flavonoid compounds according to claim 2, Features: The preparation method of the chrysin modified polyurethane is: The following steps are involved: S1: Take N,N-dimethylformamide and chrysin, stir evenly to obtain a chrysin solution; S2: Take polytetrahydrofuran diol, hexamethylene diisocyanate, dibutyltin dilaurate, and N,N-dimethylformamide, heat to 60-65°C, react for 9-10 hours to obtain a polyurethane prepolymer, add 1,6-hexanediol, react at 40-45°C for 10-12 hours to obtain a polyurethane prepolymer, add chrysin solution, react at 30-35°C for 10-12 hours to obtain a chrysin-modified polyurethane.

4. The method for preparing a fabric antibacterial finishing agent containing flavonoid compounds according to claim 1, Features: The preparation method of the modified copper-based metal organic framework material is as follows: taking deionized water and the amination copper-based metal organic framework material, stirring evenly, adding tannic acid solution, and continuing stirring for 3-4 hours to obtain the modified copper-based metal organic framework material.

5. A method for preparing a fabric antibacterial finishing agent containing flavonoid compounds according to claim 4, Features: The preparation method of the amination copper-based metal organic framework material is as follows: take ethanol, add the copper-based metal organic framework material, stir evenly, add 3-aminopropyltriethoxysilane, stir at 75-80° C. for 1-2 hours, dialyze for 11-12 hours, and dry to obtain the amination copper-based metal organic framework material.

6. A method for preparing a fabric antibacterial finishing agent containing flavonoid compounds according to claim 5, Features: The preparation method of the copper-based metal organic framework material is as follows: taking N, N-dimethylformamide and ethanol, stirring evenly, adding copper acetate monohydrate to obtain a copper acetate monohydrate solution; taking trimesic acid and N, N-dimethylformamide, stirring evenly to obtain a trimesic acid solution; taking N, N-dimethylformamide and ethanol, stirring evenly, and simultaneously dropping a copper acetate monohydrate solution and a trimesic acid solution, centrifuging, washing, drying, and grinding to obtain the copper-based metal organic framework material.

7. The method for preparing a fabric antibacterial finishing agent containing flavonoid compounds according to claim 1, Features: The organic solvent is a mixture of ethanol and acetone, and the volume ratio of ethanol to acetone is 1:

1.

8. The method for preparing a fabric antibacterial finishing agent containing flavonoid compounds according to claim 1, Features: The surfactant is any one of nonylphenol polyoxyethylene ether and lauryl alcohol polyoxyethylene ether.

9. The antibacterial finishing agent prepared according to the method for preparing an antibacterial finishing agent for fabrics containing flavonoid compounds according to any one of claims 1 to 8.

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