Antibacterial leather fabric and preparation method thereof

Abstract

The application discloses a kind of bacteriostatic leather fabric and preparation method thereof, first animal raw hide is treated with degreasing agent solution and is degreased, and the degreasing skin is obtained;First washing, neutralization, second washing, and the second washing skin is obtained;Then the second washing skin is completely immersed in bacteriostatic solution, and the bacteriostatic treatment skin is obtained by impregnation treatment;The bacteriostatic treatment skin is retanned using retanning agent, and the retanned treatment skin is obtained;Finally, the retanned treatment skin is fatliquored using fatliquoring agent, dyed, and the bacteriostatic leather fabric is obtained by fixing.The leather fabric obtained by the application has excellent bacteriostatic effect, and prolongs the service life of leather fabric.

Description

Technical Field

[0001] This invention belongs to the field of fabric preparation technology, specifically relating to an antibacterial leather fabric and its preparation method. Background Technology

[0002] Leather fabrics are made by bonding animal hides to a base fabric after degreasing and tanning. Cowhide, pigskin, sheepskin, and other animal hides are the raw materials for making leather fabrics. They possess good strength, are durable, and retain the natural grain of the animal hides, making them aesthetically pleasing, waterproof, breathable, comfortable to use, and long-lasting, thus enjoying considerable popularity. Due to the limited resources and high price of animal hides, a large amount of synthetic leather exists on the market as a cheaper alternative. However, synthetic leather has lower strength, is not waterproof, and is not breathable, failing to meet the high-quality demands of consumers.

[0003] Compared to synthetic leather, animal leather has significant advantages, but it also presents some challenges. Antibacterial properties are a major bottleneck limiting its application. Animal leather contains oils and natural proteins. During use, sweat, sebum, and metabolic waste products secreted by human sweat and sebaceous glands become nutrients for microorganisms, leading to their growth and proliferation. Therefore, natural leather requires careful daily maintenance. Improper care can result in fungal stains and mold, damaging animal leather products and potentially affecting human health.

[0004] Currently, people usually achieve antibacterial treatment of animal leather by adding antibacterial agents such as fatty alcohol polyoxyethylene ether, N-phenyl-2-naphthylamine, and cocamidopropyl betaine. However, the antibacterial effect is generally poor, and the wash resistance is also poor. The antibacterial effect will disappear after washing. In addition, it is irritating to the skin and will also affect human health.

[0005] Patent CN108265136B discloses a leather care agent and its preparation method, which is made by mixing methylparaben, monoglycerides, white oil, stearic acid, lanolin, dimethyl silicone oil, sulfated castor oil, thyme essential oil, nano silver, deionized water, vitamin A palmitate, triethanolamine borate, and coconut oil fatty acid diethanolamide as raw materials. This patented technology improves the antibacterial effect and ensures color fastness through the synergistic effect of vitamin A palmitate, triethanolamine borate, and coconut oil fatty acid diethanolamide. However, vitamin A palmitate may trigger allergic reactions in humans; triethanolamine borate has certain hazards, and short-term exposure may cause eye and skin irritation, as well as burns and chemical scalds, while long-term exposure may lead to problems with the nervous and respiratory systems. Summary of the Invention

[0006] In view of the shortcomings of the existing technology, the purpose of this invention is to provide an antibacterial leather fabric and its preparation method.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A method for preparing an antibacterial leather fabric, the specific steps of which are as follows:

[0009] S1. First, the animal hide is degreased using a degreasing agent solution to obtain degreased hide;

[0010] S2. One wash, neutralization, a second wash, to obtain a double-washed leather;

[0011] S3 Then, the second-washed leather is completely immersed in the antibacterial solution for soaking treatment to obtain antibacterial treated leather.

[0012] S4. The antibacterial treated leather is then retanned using a retanning agent to obtain retanned leather;

[0013] S5. Finally, the retanned leather is treated with a fatliquoring agent, dyed, and color-fixed to obtain the antibacterial leather fabric.

[0014] Preferably, in step S1, the animal hide is selected from any one of cowhide, pigskin, or sheepskin.

[0015] Preferably, in step S1, after cleaning the animal hide, it is completely immersed in a degreasing agent solution of 12 to 15 times its weight, left to stand for 2 to 3 hours, and the pH is adjusted to 2 to 3 using a 20 to 30% formic acid aqueous solution. The mixture is then rotated in a drum for 2 to 3 hours, and the liquid is drained.

[0016] Preferably, in step S1, the degreasing agent solution is prepared by mixing the following components in parts by weight: 3-4 parts of 1-butyl-3-methylimidazolium chloride, 4-5 parts of 1-butyl-3-methylimidazolium hexafluorophosphate, 8-10 parts of decyl glucoside, and 100 parts of animal fur waste extract.

[0017] More preferably, the animal fur waste extract is prepared by the following method: animal fur waste is added to a 1-2 mol / L sodium hydroxide solution, heated and stirred at 95-100°C for 6-8 hours, filtered while hot, and the filtrate is naturally cooled to 60-65°C. Lauroyl chloride is added dropwise to the filtrate, and the pH is controlled at 9-10 using a 1-2 mol / L sodium hydroxide solution. After the addition is complete, the mixture is stirred for 3-4 hours to obtain the animal fur waste extract. The ratio of animal fur waste, sodium hydroxide solution, and lauroyl chloride is 3-4 kg: 2-3 kg: 0.2-0.3 mL.

[0018] Preferably, in step S2, the first wash involves washing the degreased leather 2 to 3 times with 2 to 3 times its mass of water to obtain a first-washed leather; neutralization involves adding the first-washed leather to 2 to 3 times its mass of water, then adjusting the pH to 7, stirring at 35 to 40°C for 1 to 2 hours, draining the water to obtain a neutralized washed leather; the second wash involves washing the neutralized washed leather 2 to 3 times with 2 to 3 times its mass of water to obtain a second-washed leather.

[0019] Preferably, in step S3, the mass ratio of the second-washed leather to the antibacterial solution is 1:5-6; the process conditions for the immersion treatment are: ultrasonic oscillation treatment at 300-400W for 40-50 minutes.

[0020] Preferably, in step S3, the antibacterial solution is prepared by the following method:

[0021] (A) First, dry the agave until the moisture content is less than 5 wt%, then pulverize it to 80-100 mesh to obtain agave powder;

[0022] (B) Then, stir and disperse the agave powder in 20 to 25 times its weight of water, irradiate with microwave at 600 to 750 W for 10 to 12 minutes, filter and collect the filtrate;

[0023] (C) Finally, add chitosan-modified nano-hydroxyapatite to the filtrate and treat with ultrasonic vibration at 300-400W for 30-40 minutes to obtain the antibacterial solution.

[0024] More preferably, the mass ratio of agave powder to chitosan-modified nano-hydroxyapatite is 10:5-6.

[0025] More preferably, the chitosan-modified nano-hydroxyapatite is prepared by the following method: first, hydroxypropyltrimethylammonium chloride chitosan is stirred and dispersed in deionized water to obtain a chitosan aqueous solution; then, nano-hydroxyapatite is added to the chitosan aqueous solution; the mixture is ultrasonically oscillated at 200-300W for 50-60 minutes at 5-10°C; the supernatant is collected by centrifugation at room temperature; and unbound material is removed by microporous membrane filtration to obtain the final product; wherein, the ratio of hydroxypropyltrimethylammonium chloride chitosan, nano-hydroxyapatite, and deionized water is 1 mg: 1-2 mg: 5-6 mL.

[0026] Preferably, in step S4, the specific method for retanning is as follows: soak the antibacterial treated leather in 2 to 3 times its weight of water at 40 to 50°C for 40 to 50 minutes, add the retanning agent, rotate the drum for 2 to 3 hours, and then drain the liquid; the mass ratio of the antibacterial treated leather to the retanning agent is 1:0.8 to 1.

[0027] Preferably, in step S4, the retanning agent is obtained by mixing acrylic retanning agent (RG-BR02, Weifang Jintai Materials Factory) and modified montmorillonite at a mass ratio of 1:0.2-0.3.

[0028] More preferably, the modified montmorillonite is prepared by the following method: first, sodium montmorillonite is stirred and dispersed in water, then L-tyrosine is added, the pH is adjusted to 7, the mixture is stirred and heated to 90°C, kept warm and stirred for 3 hours, naturally cooled to room temperature, the precipitate is collected by centrifugation, washed with water, and dried to obtain the product; wherein, the mass ratio of sodium montmorillonite, water, and L-tyrosine is 4-5:100:6-7.

[0029] Preferably, in step S5, the mass ratio of retanned leather to fatliquoring agent is 100:0.3-0.4; the specific method of fatliquoring treatment is as follows: soak the retanned leather in 2-3 times its weight of water at 60-65°C for 20-30 minutes, add fatliquoring agent, rotate the drum for 2-3 hours, and then drain the liquid.

[0030] Preferably, in step S5, the fatliquoring agent is obtained by mixing sulfite fish oil, cow hoof oil, and polyethylene glycol 400 dioleate in a mass ratio of 1:1:0.3-0.4.

[0031] An antibacterial leather fabric is obtained through the aforementioned preparation method.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] This invention first degreases animal hides with a degreasing agent solution to obtain degreased hides; then washes them once, neutralizes them, and washes them a second time to obtain double-washed hides; next, the double-washed hides are completely immersed in an antibacterial solution for immersion treatment to obtain antibacterial treated hides; then, the antibacterial treated hides are retanned using a retanning agent to obtain retanned hides; finally, the retanned hides are fatliquoring treated with a fatliquoring agent, dyed, and color-fixed to obtain an antibacterial leather fabric. The leather fabric obtained by this invention has excellent antibacterial effects and extends the service life of the leather fabric.

[0034] The degreasing agent solution is prepared by mixing 1-butyl-3-methylimidazolium chloride, 1-butyl-3-methylimidazolium hexafluorophosphate, decyl glucoside, and animal hide waste extract. The 1-butyl-3-methylimidazolium chloride and 1-butyl-3-methylimidazolium hexafluorophosphate in the degreasing agent solution are ionic liquids with excellent solubility for oils and fats. The animal hide waste extract has good compatibility with the protein components in animal hides, thus working synergistically with 1-butyl-3-methylimidazolium chloride, 1-butyl-3-methylimidazolium hexafluorophosphate, and decyl glucoside to improve the degreasing effect. This provides a good foundation for the full penetration of the subsequent antibacterial solution, further enhancing the antibacterial effect.

[0035] The antibacterial solution is prepared using agave and chitosan-modified nano-hydroxyapatite as raw materials. It combines the antibacterial components of agave with the antibacterial properties of chitosan and nano-hydroxyapatite. Furthermore, the nano-hydroxyapatite has good adsorption properties, which further enhances the overall antibacterial effect.

[0036] The retanning agent is obtained by mixing acrylic retanning agent with modified montmorillonite. The fatliquoring agent is obtained by mixing sulfite-treated fish oil, cow's hoof oil, and polyethylene glycol 400 dioleate. Through appropriate retanning and fatliquoring treatments, the antibacterial components are evenly distributed in the leather fabric, further improving the antibacterial effect. Detailed Implementation

[0037] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0038] Unless otherwise specified, all products in this invention were purchased through market channels.

[0039] For ease of comparison, the animal hides used in the examples and comparative examples are all from the same source of cowhide.

[0040] Example 1

[0041] A method for preparing an antibacterial leather fabric, the specific steps of which are as follows:

[0042] S1. First, the animal hide is degreased using a degreasing agent solution to obtain degreased hide;

[0043] S2. One wash, neutralization, a second wash, to obtain a double-washed leather;

[0044] S3 Then, the second-washed leather is completely immersed in the antibacterial solution for soaking treatment to obtain antibacterial treated leather.

[0045] S4. The antibacterial treated leather is then retanned using a retanning agent to obtain retanned leather;

[0046] S5. Finally, the retanned leather is fatliquored, dyed, and color-fixed to obtain antibacterial leather fabric.

[0047] In step S1, after cleaning the animal hide, it is completely immersed in a degreasing agent solution with a weight of 12 times its weight, left to stand for 2 hours, and the pH is adjusted to 2 using a 20% formic acid aqueous solution. The mixture is then rotated in a drum for 2 hours, and the liquid is drained.

[0048] In step S1, the degreasing agent solution is prepared by mixing the following components: 0.3 kg of 1-butyl-3-methylimidazolium chloride, 0.4 kg of 1-butyl-3-methylimidazolium hexafluorophosphate, 0.8 kg of decyl glucoside, and 10 kg of animal fur waste extract.

[0049] Animal fur waste extract is prepared by the following method: 30 kg of animal fur waste is added to 20 kg of 1 mol / L sodium hydroxide solution, stirred and heated at 95°C for 6 hours, filtered while hot, and the filtrate is naturally cooled to 60°C. 2 mL of lauroyl chloride is added dropwise to the filtrate, and the pH is controlled at 9 using 1 mol / L sodium hydroxide solution. After the addition is complete, the mixture is stirred for 3 hours to obtain the animal fur waste extract.

[0050] In step S2, the first wash involves washing the degreased leather twice with twice its mass of water to obtain a first-wash leather; the neutralization involves adding the first-wash leather to twice its mass of water, adjusting the pH to 7, stirring at 35°C for 1 hour, draining the water, and obtaining a neutralized washed leather; the second wash involves washing the neutralized washed leather twice with twice its mass of water to obtain a second-wash leather.

[0051] In step S3, the mass ratio of the second-washed leather to the antibacterial solution is 1:5; the process conditions for the immersion treatment are: 300W ultrasonic oscillation treatment for 40 minutes.

[0052] In step S3, the antibacterial solution is prepared by the following method:

[0053] (A) First, dry the agave until the moisture content is less than 5 wt%, then pulverize it to 80 mesh to obtain agave powder;

[0054] (B) Then, the agave powder was stirred and dispersed in 20 times its weight of water, irradiated with microwave at 600W for 10 minutes, and the filtrate was collected by filtration.

[0055] (C) Finally, add chitosan-modified nano-hydroxyapatite to the filtrate and treat with ultrasonic vibration at 300W for 30 minutes to obtain the antibacterial solution.

[0056] The mass ratio of agave powder to chitosan-modified nano-hydroxyapatite is 10:5.

[0057] Chitosan-modified nano-hydroxyapatite was prepared by the following method: 1g of hydroxypropyltrimethylammonium chloride chitosan was first dispersed in 5L of deionized water to obtain a chitosan aqueous solution. Then, 1g of nano-hydroxyapatite was added to the chitosan aqueous solution. The mixture was ultrasonically oscillated at 200W for 50 minutes at 5℃. The supernatant was collected by centrifugation at room temperature and the unbound material was removed by microporous membrane filtration.

[0058] In step S4, the specific method of retanning is as follows: soak the antibacterial treated leather in 40°C water at twice its weight for 40 minutes, add the retanning agent, rotate the drum for 2 hours, and then drain the liquid; the mass ratio of antibacterial treated leather to retanning agent is 1:0.8.

[0059] In step S4, the retanning agent is obtained by mixing acrylic retanning agent (RG-BR02, Weifang Jintai Materials Factory) and modified montmorillonite at a mass ratio of 1:0.2.

[0060] Modified montmorillonite is prepared by the following method: First, 40g of sodium montmorillonite is dispersed in 1kg of water by stirring. Then, 60g of L-tyrosine is added, the pH is adjusted to 7, the mixture is stirred and heated to 90℃, kept warm and stirred for 3 hours, cooled naturally to room temperature, the precipitate is collected by centrifugation, washed with water, and dried to obtain the product.

[0061] In step S5, the mass ratio of retanned leather to fatliquoring agent is 100:0.3. The specific method of fatliquoring treatment is as follows: soak the retanned leather in 60°C water at twice its weight for 20 minutes, add the fatliquoring agent, rotate the drum for 2 hours, and then drain the liquid.

[0062] In step S5, the fatliquoring agent is obtained by mixing sulfite fish oil, cow hoof oil, and polyethylene glycol 400 dioleate in a mass ratio of 1:1:0.3.

[0063] Example 2

[0064] A method for preparing an antibacterial leather fabric, the specific steps of which are as follows:

[0065] S1. First, the animal hide is degreased using a degreasing agent solution to obtain degreased hide;

[0066] S2. One wash, neutralization, a second wash, to obtain a double-washed leather;

[0067] S3 Then, the second-washed leather is completely immersed in the antibacterial solution for soaking treatment to obtain antibacterial treated leather.

[0068] S4. The antibacterial treated leather is then retanned using a retanning agent to obtain retanned leather;

[0069] S5. Finally, the retanned leather is fatliquored, dyed, and color-fixed to obtain antibacterial leather fabric.

[0070] In step S1, after cleaning the animal hide, it is completely immersed in a degreasing agent solution with a weight of 15 times its weight, left to stand for 3 hours, and the pH is adjusted to 3 using a 30% formic acid aqueous solution. The mixture is then rotated in a drum for 3 hours, and the liquid is drained.

[0071] In step S1, the degreasing agent solution is prepared by mixing the following components: 0.4 kg of 1-butyl-3-methylimidazolium chloride, 0.5 kg of 1-butyl-3-methylimidazolium hexafluorophosphate, 1 kg of decyl glucoside, and 10 kg of animal fur waste extract.

[0072] Animal fur waste extract is prepared by the following method: 40 kg of animal fur waste is added to 30 kg of 2 mol / L sodium hydroxide solution, stirred and heated at 100°C for 8 hours, filtered while hot, and the filtrate is naturally cooled to 65°C. 3 mL of lauroyl chloride is added dropwise to the filtrate, and the pH is controlled at 10 using 2 mol / L sodium hydroxide solution. After the addition is complete, the mixture is stirred for 4 hours to obtain the animal fur waste extract.

[0073] In step S2, the first wash involves washing the degreased leather three times with three times its mass of water to obtain a first-wash leather; the neutralization involves adding the first-wash leather to three times its mass of water, adjusting the pH to 7, stirring at 40°C for 2 hours, draining the water, and obtaining a neutralized washed leather; the second wash involves washing the neutralized washed leather three times with three times its mass of water to obtain a second-wash leather.

[0074] In step S3, the mass ratio of the second-washed leather to the antibacterial solution is 1:6; the process conditions for the immersion treatment are: 400W ultrasonic oscillation treatment for 50 minutes.

[0075] In step S3, the antibacterial solution is prepared by the following method:

[0076] (A) First, dry the agave until the moisture content is less than 5 wt%, then pulverize it to 100 mesh to obtain agave powder;

[0077] (B) Then, the agave powder was stirred and dispersed in 25 times its weight of water, microwaved at 750W for 12 minutes, and the filtrate was collected by filtration.

[0078] (C) Finally, add chitosan-modified nano-hydroxyapatite to the filtrate and treat with ultrasonic vibration at 400W for 40 minutes to obtain the antibacterial solution.

[0079] The mass ratio of agave powder to chitosan-modified nano-hydroxyapatite was 10:6.

[0080] Chitosan-modified nano-hydroxyapatite was prepared by the following method: 1g of hydroxypropyltrimethylammonium chloride chitosan was first dispersed in 6L of deionized water to obtain a chitosan aqueous solution. Then, 2g of nano-hydroxyapatite was added to the chitosan aqueous solution. The mixture was ultrasonically oscillated at 300W for 60 minutes at 10℃. The supernatant was collected by centrifugation at room temperature and filtered through a microporous membrane to remove unbound material, thus obtaining the final product.

[0081] In step S4, the specific method of retanning is as follows: soak the antibacterial treated leather in 50°C water at 3 times its weight for 50 minutes, add the retanning agent, rotate the drum for 3 hours, and then drain the liquid; the mass ratio of antibacterial treated leather to retanning agent is 1:1.

[0082] In step S4, the retanning agent is obtained by mixing acrylic retanning agent (RG-BR02, Weifang Jintai Materials Factory) and modified montmorillonite at a mass ratio of 1:0.3.

[0083] Modified montmorillonite is prepared by the following method: First, 50g of sodium montmorillonite is dispersed in 1kg of water by stirring. Then, 70g of L-tyrosine is added, the pH is adjusted to 7, the mixture is stirred and heated to 90℃, kept warm and stirred for 3 hours, cooled naturally to room temperature, the precipitate is collected by centrifugation, washed with water, and dried to obtain the product.

[0084] In step S5, the mass ratio of retanned leather to fatliquoring agent is 100:0.4. The specific method of fatliquoring treatment is as follows: soak the retanned leather in 65°C water at 3 times its weight for 30 minutes, add fatliquoring agent, rotate the drum for 3 hours, and then drain the liquid.

[0085] In step S5, the fatliquoring agent is obtained by mixing sulfite fish oil, cow hoof oil, and polyethylene glycol 400 dioleate in a mass ratio of 1:1:0.4.

[0086] Example 3

[0087] A method for preparing an antibacterial leather fabric, the specific steps of which are as follows:

[0088] S1. First, the animal hide is degreased using a degreasing agent solution to obtain degreased hide;

[0089] S2. One wash, neutralization, a second wash, to obtain a double-washed leather;

[0090] S3 Then, the second-washed leather is completely immersed in the antibacterial solution for soaking treatment to obtain antibacterial treated leather.

[0091] S4. The antibacterial treated leather is then retanned using a retanning agent to obtain retanned leather;

[0092] S5. Finally, the retanned leather is fatliquored, dyed, and color-fixed to obtain antibacterial leather fabric.

[0093] In step S1, after cleaning the animal hide, it is completely immersed in a degreasing agent solution with a weight of 13 times its weight, left to stand for 2 hours, and the pH is adjusted to 3 using a 25% formic acid aqueous solution. The mixture is then rotated in a drum for 2 hours, and the liquid is drained.

[0094] In step S1, the degreasing agent solution is prepared by mixing the following components: 0.35 kg of 1-butyl-3-methylimidazolium chloride, 0.45 kg of 1-butyl-3-methylimidazolium hexafluorophosphate, 0.9 kg of decyl glucoside, and 10 kg of animal fur waste extract.

[0095] Animal fur waste extract is prepared by the following method: 35 kg of animal fur waste is added to 25 kg of 1.5 mol / L sodium hydroxide solution, stirred and heated at 98°C for 7 hours, filtered while hot, and the filtrate is naturally cooled to 62°C. 3 mL of lauroyl chloride is added dropwise to the filtrate, and the pH is controlled at 9 using 2 mol / L sodium hydroxide solution. After the addition is complete, the mixture is stirred for 3 hours to obtain the animal fur waste extract.

[0096] In step S2, the first wash involves washing the degreased leather three times with twice its mass of water to obtain a first-wash leather; the neutralization involves adding the first-wash leather to twice its mass of water, adjusting the pH to 7, stirring at 38°C for 1.5 hours, draining the water, and obtaining a neutralized washed leather; the second wash involves washing the neutralized washed leather three times with twice its mass of water to obtain a second-wash leather.

[0097] In step S3, the mass ratio of the second-washed leather to the antibacterial solution is 1:5; the process conditions for the immersion treatment are: 400W ultrasonic oscillation treatment for 45 minutes.

[0098] In step S3, the antibacterial solution is prepared by the following method:

[0099] (A) First, dry the agave until the moisture content is less than 5 wt%, then pulverize it to 90 mesh to obtain agave powder;

[0100] (B) Then, the agave powder was stirred and dispersed in 22 times its weight of water, microwaved at 700W for 11 minutes, and the filtrate was collected by filtration.

[0101] (C) Finally, add chitosan-modified nano-hydroxyapatite to the filtrate and treat with ultrasonic oscillation at 400W for 35 minutes to obtain the antibacterial solution.

[0102] The mass ratio of agave powder to chitosan-modified nano-hydroxyapatite was 10:5.5.

[0103] Chitosan-modified nano-hydroxyapatite was prepared by the following method: 1g of hydroxypropyltrimethylammonium chloride chitosan was first dispersed in 5.5L of deionized water to obtain a chitosan aqueous solution. Then, 1.5g of nano-hydroxyapatite was added to the chitosan aqueous solution. The mixture was ultrasonically oscillated at 300W for 55 minutes at 8℃. The supernatant was collected by centrifugation at room temperature and filtered through a microporous membrane to remove unbound material, thus obtaining the final product.

[0104] In step S4, the specific method for retanning is as follows: soak the antibacterial treated leather in 45°C water at 3 times its weight for 45 minutes, add the retanning agent, rotate the drum for 2.5 hours, and then drain the liquid; the mass ratio of the antibacterial treated leather to the retanning agent is 1:0.9.

[0105] In step S4, the retanning agent is obtained by mixing acrylic retanning agent (RG-BR02, Weifang Jintai Materials Factory) and modified montmorillonite at a mass ratio of 1:0.25.

[0106] Modified montmorillonite is prepared by the following method: First, 45g of sodium montmorillonite is dispersed in 1kg of water by stirring. Then, 65g of L-tyrosine is added, the pH is adjusted to 7, the mixture is stirred and heated to 90℃, kept warm and stirred for 3 hours, cooled naturally to room temperature, the precipitate is collected by centrifugation, washed with water, and dried to obtain the product.

[0107] In step S5, the mass ratio of retanned leather to fatliquoring agent is 100:0.35. The specific method of fatliquoring treatment is as follows: soak the retanned leather in 62°C water at twice its weight for 20 to 30 minutes, add the fatliquoring agent, rotate the drum for 3 hours, and then drain the liquid.

[0108] In step S5, the fatliquoring agent is obtained by mixing sulfite fish oil, cow hoof oil, and polyethylene glycol 400 dioleate in a mass ratio of 1:1:0.35.

[0109] Comparative Example 1

[0110] A method for preparing an antibacterial leather fabric, the specific steps of which are as follows:

[0111] S1. First, the animal hide is degreased using a degreasing agent solution to obtain degreased hide;

[0112] S2. One wash, neutralization, a second wash, to obtain a double-washed leather;

[0113] S3 Then, the second-washed leather is completely immersed in the antibacterial solution for soaking treatment to obtain antibacterial treated leather.

[0114] S4. The antibacterial treated leather is then retanned using a retanning agent to obtain retanned leather;

[0115] S5. Finally, the retanned leather is fatliquored, dyed, and color-fixed to obtain antibacterial leather fabric.

[0116] In step S1, after cleaning the animal hide, it is completely immersed in a degreasing agent solution with a weight of 12 times its weight, left to stand for 2 hours, and the pH is adjusted to 2 using a 20% formic acid aqueous solution. The mixture is then rotated in a drum for 2 hours, and the liquid is drained.

[0117] In step S1, the degreasing agent solution is prepared by mixing the following components: 0.3 kg of 1-butyl-3-methylimidazolium chloride, 0.4 kg of 1-butyl-3-methylimidazolium hexafluorophosphate, 0.8 kg of decyl glucoside, and 10 kg of animal fur waste extract.

[0118] Animal fur waste extract is prepared by the following method: 30 kg of animal fur waste is added to 20 kg of 1 mol / L sodium hydroxide solution, stirred and heated at 95°C for 6 hours, filtered while hot, and the filtrate is naturally cooled to 60°C. 2 mL of lauroyl chloride is added dropwise to the filtrate, and the pH is controlled at 9 using 1 mol / L sodium hydroxide solution. After the addition is complete, the mixture is stirred for 3 hours to obtain the animal fur waste extract.

[0119] In step S2, the first wash involves washing the degreased leather twice with twice its mass of water to obtain a first-wash leather; the neutralization involves adding the first-wash leather to twice its mass of water, adjusting the pH to 7, stirring at 35°C for 1 hour, draining the water, and obtaining a neutralized washed leather; the second wash involves washing the neutralized washed leather twice with twice its mass of water to obtain a second-wash leather.

[0120] In step S3, the mass ratio of the second-washed leather to the antibacterial solution is 1:5; the process conditions for the immersion treatment are: 300W ultrasonic oscillation treatment for 40 minutes.

[0121] In step S3, the antibacterial solution is prepared by the following method:

[0122] (A) First, dry the agave until the moisture content is less than 5 wt%, then pulverize it to 80 mesh to obtain agave powder;

[0123] (B) Then, the agave powder is stirred and dispersed in 20 times its weight of water, irradiated with microwave at 600W for 10 minutes, filtered and the filtrate is obtained as the antibacterial solution.

[0124] In step S4, the specific method of retanning is as follows: soak the antibacterial treated leather in 40°C water at twice its weight for 40 minutes, add the retanning agent, rotate the drum for 2 hours, and then drain the liquid; the mass ratio of antibacterial treated leather to retanning agent is 1:0.8.

[0125] In step S4, the retanning agent is obtained by mixing acrylic retanning agent (RG-BR02, Weifang Jintai Materials Factory) and modified montmorillonite at a mass ratio of 1:0.2.

[0126] Modified montmorillonite is prepared by the following method: First, 40g of sodium montmorillonite is dispersed in 1kg of water by stirring. Then, 60g of L-tyrosine is added, the pH is adjusted to 7, the mixture is stirred and heated to 90℃, kept warm and stirred for 3 hours, cooled naturally to room temperature, the precipitate is collected by centrifugation, washed with water, and dried to obtain the product.

[0127] In step S5, the mass ratio of retanned leather to fatliquoring agent is 100:0.3. The specific method of fatliquoring treatment is as follows: soak the retanned leather in 60°C water at twice its weight for 20 minutes, add the fatliquoring agent, rotate the drum for 2 hours, and then drain the liquid.

[0128] In step S5, the fatliquoring agent is obtained by mixing sulfite fish oil, cow hoof oil, and polyethylene glycol 400 dioleate in a mass ratio of 1:1:0.3.

[0129] Comparative Example 2

[0130] A method for preparing an antibacterial leather fabric, the specific steps of which are as follows:

[0131] S1. First, the animal hide is degreased using a degreasing agent solution to obtain degreased hide;

[0132] S2. One wash, neutralization, a second wash, to obtain a double-washed leather;

[0133] S3 Then, the second-washed leather is completely immersed in the antibacterial solution for soaking treatment to obtain antibacterial treated leather.

[0134] S4. The antibacterial treated leather is then retanned using a retanning agent to obtain retanned leather;

[0135] S5. Finally, the retanned leather is fatliquored, dyed, and color-fixed to obtain antibacterial leather fabric.

[0136] In step S1, after cleaning the animal hide, it is completely immersed in a degreasing agent solution with a weight of 12 times its weight, left to stand for 2 hours, and the pH is adjusted to 2 using a 20% formic acid aqueous solution. The mixture is then rotated in a drum for 2 hours, and the liquid is drained.

[0137] In step S1, the degreasing agent solution is prepared by mixing the following components: 0.4 kg of 1-butyl-3-methylimidazolium hexafluorophosphate, 0.8 kg of decyl glucoside, and 10 kg of animal fur waste extract.

[0138] Animal fur waste extract is prepared by the following method: 30 kg of animal fur waste is added to 20 kg of 1 mol / L sodium hydroxide solution, stirred and heated at 95°C for 6 hours, filtered while hot, and the filtrate is naturally cooled to 60°C. 2 mL of lauroyl chloride is added dropwise to the filtrate, and the pH is controlled at 9 using 1 mol / L sodium hydroxide solution. After the addition is complete, the mixture is stirred for 3 hours to obtain the animal fur waste extract.

[0139] In step S2, the first wash involves washing the degreased leather twice with twice its mass of water to obtain a first-wash leather; the neutralization involves adding the first-wash leather to twice its mass of water, adjusting the pH to 7, stirring at 35°C for 1 hour, draining the water, and obtaining a neutralized washed leather; the second wash involves washing the neutralized washed leather twice with twice its mass of water to obtain a second-wash leather.

[0140] In step S3, the mass ratio of the second-washed leather to the antibacterial solution is 1:5; the process conditions for the immersion treatment are: 300W ultrasonic oscillation treatment for 40 minutes.

[0141] In step S3, the antibacterial solution is prepared by the following method:

[0142] (A) First, dry the agave until the moisture content is less than 5 wt%, then pulverize it to 80 mesh to obtain agave powder;

[0143] (B) Then, the agave powder was stirred and dispersed in 20 times its weight of water, irradiated with microwave at 600W for 10 minutes, and the filtrate was collected by filtration.

[0144] (C) Finally, add chitosan-modified nano-hydroxyapatite to the filtrate and treat with ultrasonic vibration at 300W for 30 minutes to obtain the antibacterial solution.

[0145] The mass ratio of agave powder to chitosan-modified nano-hydroxyapatite was 10:5.

[0146] Chitosan-modified nano-hydroxyapatite was prepared by the following method: 1g of hydroxypropyltrimethylammonium chloride chitosan was first dispersed in 5L of deionized water to obtain a chitosan aqueous solution. Then, 1g of nano-hydroxyapatite was added to the chitosan aqueous solution. The mixture was ultrasonically oscillated at 200W for 50 minutes at 5℃. The supernatant was collected by centrifugation at room temperature and the unbound material was removed by microporous membrane filtration.

[0147] In step S4, the specific method of retanning is as follows: soak the antibacterial treated leather in 40°C water at twice its weight for 40 minutes, add the retanning agent, rotate the drum for 2 hours, and then drain the liquid; the mass ratio of antibacterial treated leather to retanning agent is 1:0.8.

[0148] In step S4, the retanning agent is obtained by mixing acrylic retanning agent (RG-BR02, Weifang Jintai Materials Factory) and modified montmorillonite at a mass ratio of 1:0.2.

[0149] Modified montmorillonite is prepared by the following method: First, 40g of sodium montmorillonite is dispersed in 1kg of water by stirring. Then, 60g of L-tyrosine is added, the pH is adjusted to 7, the mixture is stirred and heated to 90℃, kept warm and stirred for 3 hours, cooled naturally to room temperature, the precipitate is collected by centrifugation, washed with water, and dried to obtain the product.

[0150] In step S5, the mass ratio of retanned leather to fatliquoring agent is 100:0.3. The specific method of fatliquoring treatment is as follows: soak the retanned leather in 60°C water at twice its weight for 20 minutes, add the fatliquoring agent, rotate the drum for 2 hours, and then drain the liquid.

[0151] In step S5, the fatliquoring agent is obtained by mixing sulfite fish oil, cow hoof oil, and polyethylene glycol 400 dioleate in a mass ratio of 1:1:0.3.

[0152] Comparative Example 3

[0153] A method for preparing an antibacterial leather fabric, the specific steps of which are as follows:

[0154] S1. First, the animal hide is degreased using a degreasing agent solution to obtain degreased hide;

[0155] S2. One wash, neutralization, a second wash, to obtain a double-washed leather;

[0156] S3 Then, the second-washed leather is completely immersed in the antibacterial solution for soaking treatment to obtain antibacterial treated leather.

[0157] S4. The antibacterial treated leather is then retanned using a retanning agent to obtain retanned leather;

[0158] S5. Finally, the retanned leather is fatliquored, dyed, and color-fixed to obtain antibacterial leather fabric.

[0159] In step S1, after cleaning the animal hide, it is completely immersed in a degreasing agent solution with a weight of 12 times its weight, left to stand for 2 hours, and the pH is adjusted to 2 using a 20% formic acid aqueous solution. The mixture is then rotated in a drum for 2 hours, and the liquid is drained.

[0160] In step S1, the degreasing agent solution is prepared by mixing the following components: 0.3 kg of 1-butyl-3-methylimidazolium chloride, 0.8 kg of decyl glucoside, and 10 kg of animal fur waste extract.

[0161] Animal fur waste extract is prepared by the following method: 30 kg of animal fur waste is added to 20 kg of 1 mol / L sodium hydroxide solution, stirred and heated at 95°C for 6 hours, filtered while hot, and the filtrate is naturally cooled to 60°C. 2 mL of lauroyl chloride is added dropwise to the filtrate, and the pH is controlled at 9 using 1 mol / L sodium hydroxide solution. After the addition is complete, the mixture is stirred for 3 hours to obtain the animal fur waste extract.

[0162] In step S2, the first wash involves washing the degreased leather twice with twice its mass of water to obtain a first-wash leather; the neutralization involves adding the first-wash leather to twice its mass of water, adjusting the pH to 7, stirring at 35°C for 1 hour, draining the water, and obtaining a neutralized washed leather; the second wash involves washing the neutralized washed leather twice with twice its mass of water to obtain a second-wash leather.

[0163] In step S3, the mass ratio of the second-washed leather to the antibacterial solution is 1:5; the process conditions for the immersion treatment are: 300W ultrasonic oscillation treatment for 40 minutes.

[0164] In step S3, the antibacterial solution is prepared by the following method:

[0165] (A) First, dry the agave until the moisture content is less than 5 wt%, then pulverize it to 80 mesh to obtain agave powder;

[0166] (B) Then, the agave powder was stirred and dispersed in 20 times its weight of water, irradiated with microwave at 600W for 10 minutes, and the filtrate was collected by filtration.

[0167] (C) Finally, add chitosan-modified nano-hydroxyapatite to the filtrate and treat with ultrasonic vibration at 300W for 30 minutes to obtain the antibacterial solution.

[0168] The mass ratio of agave powder to chitosan-modified nano-hydroxyapatite is 10:5.

[0169] Chitosan-modified nano-hydroxyapatite was prepared by the following method: 1g of hydroxypropyltrimethylammonium chloride chitosan was first dispersed in 5L of deionized water to obtain a chitosan aqueous solution. Then, 1g of nano-hydroxyapatite was added to the chitosan aqueous solution. The mixture was ultrasonically oscillated at 200W for 50 minutes at 5℃. The supernatant was collected by centrifugation at room temperature and the unbound material was removed by microporous membrane filtration.

[0170] In step S4, the specific method of retanning is as follows: soak the antibacterial treated leather in 40°C water at twice its weight for 40 minutes, add the retanning agent, rotate the drum for 2 hours, and then drain the liquid; the mass ratio of antibacterial treated leather to retanning agent is 1:0.8.

[0171] In step S4, the retanning agent is obtained by mixing acrylic retanning agent (RG-BR02, Weifang Jintai Materials Factory) and modified montmorillonite at a mass ratio of 1:0.2.

[0172] Modified montmorillonite is prepared by the following method: First, 40g of sodium montmorillonite is dispersed in 1kg of water by stirring. Then, 60g of L-tyrosine is added, the pH is adjusted to 7, the mixture is stirred and heated to 90℃, kept warm and stirred for 3 hours, cooled naturally to room temperature, the precipitate is collected by centrifugation, washed with water, and dried to obtain the product.

[0173] In step S5, the mass ratio of retanned leather to fatliquoring agent is 100:0.3. The specific method of fatliquoring treatment is as follows: soak the retanned leather in 60°C water at twice its weight for 20 minutes, add the fatliquoring agent, rotate the drum for 2 hours, and then drain the liquid.

[0174] In step S5, the fatliquoring agent is obtained by mixing sulfite fish oil, cow hoof oil, and polyethylene glycol 400 dioleate in a mass ratio of 1:1:0.3.

[0175] Comparative Example 4

[0176] A method for preparing an antibacterial leather fabric, the specific steps of which are as follows:

[0177] S1. First, the animal hide is degreased using a degreasing agent solution to obtain degreased hide;

[0178] S2. One wash, neutralization, a second wash, to obtain a double-washed leather;

[0179] S3 Then, the second-washed leather is completely immersed in the antibacterial solution for soaking treatment to obtain antibacterial treated leather.

[0180] S4. The antibacterial treated leather is then retanned using a retanning agent to obtain retanned leather;

[0181] S5. Finally, the retanned leather is fatliquored, dyed, and color-fixed to obtain antibacterial leather fabric.

[0182] In step S1, after cleaning the animal hide, it is completely immersed in a degreasing agent solution with a weight of 12 times its weight, left to stand for 2 hours, and the pH is adjusted to 2 using a 20% formic acid aqueous solution. The mixture is then rotated in a drum for 2 hours, and the liquid is drained.

[0183] In step S1, the degreasing agent solution is prepared by mixing the following components: 0.3 kg of 1-butyl-3-methylimidazolium chloride, 0.4 kg of 1-butyl-3-methylimidazolium hexafluorophosphate, and 10 kg of animal fur waste extract.

[0184] Animal fur waste extract is prepared by the following method: 30 kg of animal fur waste is added to 20 kg of 1 mol / L sodium hydroxide solution, stirred and heated at 95°C for 6 hours, filtered while hot, and the filtrate is naturally cooled to 60°C. 2 mL of lauroyl chloride is added dropwise to the filtrate, and the pH is controlled at 9 using 1 mol / L sodium hydroxide solution. After the addition is complete, the mixture is stirred for 3 hours to obtain the animal fur waste extract.

[0185] In step S2, the first wash involves washing the degreased leather twice with twice its mass of water to obtain a first-wash leather; the neutralization involves adding the first-wash leather to twice its mass of water, adjusting the pH to 7, stirring at 35°C for 1 hour, draining the water, and obtaining a neutralized washed leather; the second wash involves washing the neutralized washed leather twice with twice its mass of water to obtain a second-wash leather.

[0186] In step S3, the mass ratio of the second-washed leather to the antibacterial solution is 1:5; the process conditions for the immersion treatment are: 300W ultrasonic oscillation treatment for 40 minutes.

[0187] In step S3, the antibacterial solution is prepared by the following method:

[0188] (A) First, dry the agave until the moisture content is less than 5 wt%, then pulverize it to 80 mesh to obtain agave powder;

[0189] (B) Then, the agave powder was stirred and dispersed in 20 times its weight of water, irradiated with microwave at 600W for 10 minutes, and the filtrate was collected by filtration.

[0190] (C) Finally, add chitosan-modified nano-hydroxyapatite to the filtrate and treat with ultrasonic vibration at 300W for 30 minutes to obtain the antibacterial solution.

[0191] The mass ratio of agave powder to chitosan-modified nano-hydroxyapatite is 10:5.

[0192] Chitosan-modified nano-hydroxyapatite was prepared by the following method: 1g of hydroxypropyltrimethylammonium chloride chitosan was first dispersed in 5L of deionized water to obtain a chitosan aqueous solution. Then, 1g of nano-hydroxyapatite was added to the chitosan aqueous solution. The mixture was ultrasonically oscillated at 200W for 50 minutes at 5℃. The supernatant was collected by centrifugation at room temperature and the unbound material was removed by microporous membrane filtration.

[0193] In step S4, the specific method of retanning is as follows: soak the antibacterial treated leather in 40°C water at twice its weight for 40 minutes, add the retanning agent, rotate the drum for 2 hours, and then drain the liquid; the mass ratio of antibacterial treated leather to retanning agent is 1:0.8.

[0194] In step S4, the retanning agent is obtained by mixing acrylic retanning agent (RG-BR02, Weifang Jintai Materials Factory) and modified montmorillonite at a mass ratio of 1:0.2.

[0195] Modified montmorillonite is prepared by the following method: First, 40g of sodium montmorillonite is dispersed in 1kg of water by stirring. Then, 60g of L-tyrosine is added, the pH is adjusted to 7, the mixture is stirred and heated to 90℃, kept warm and stirred for 3 hours, cooled naturally to room temperature, the precipitate is collected by centrifugation, washed with water, and dried to obtain the product.

[0196] In step S5, the mass ratio of retanned leather to fatliquoring agent is 100:0.3. The specific method of fatliquoring treatment is as follows: soak the retanned leather in 60°C water at twice its weight for 20 minutes, add the fatliquoring agent, rotate the drum for 2 hours, and then drain the liquid.

[0197] In step S5, the fatliquoring agent is obtained by mixing sulfite fish oil, cow hoof oil, and polyethylene glycol 400 dioleate in a mass ratio of 1:1:0.3.

[0198] Comparative Example 5

[0199] A method for preparing an antibacterial leather fabric, the specific steps of which are as follows:

[0200] S1. First, the animal hide is degreased using a degreasing agent solution to obtain degreased hide;

[0201] S2. One wash, neutralization, a second wash, to obtain a double-washed leather;

[0202] S3 Then, the second-washed leather is completely immersed in the antibacterial solution for soaking treatment to obtain antibacterial treated leather.

[0203] S4. The antibacterial treated leather is then retanned using a retanning agent to obtain retanned leather;

[0204] S5. Finally, the retanned leather is fatliquored, dyed, and color-fixed to obtain antibacterial leather fabric.

[0205] In step S1, after cleaning the animal hide, it is completely immersed in a degreasing agent solution with a weight of 12 times its weight, left to stand for 2 hours, and the pH is adjusted to 2 using a 20% formic acid aqueous solution. The mixture is then rotated in a drum for 2 hours, and the liquid is drained.

[0206] In step S1, the degreasing agent solution is prepared by mixing the following components: 0.3 kg of 1-butyl-3-methylimidazolium chloride, 0.4 kg of 1-butyl-3-methylimidazolium hexafluorophosphate, 0.8 kg of decyl glucoside, and 10 kg of animal fur waste extract.

[0207] Animal fur waste extract is prepared by the following method: 30 kg of animal fur waste is added to 20 kg of 1 mol / L sodium hydroxide solution, stirred and heated at 95°C for 6 hours, filtered while hot, and the filtrate is naturally cooled to 60°C. 2 mL of lauroyl chloride is added dropwise to the filtrate, and the pH is controlled at 9 using 1 mol / L sodium hydroxide solution. After the addition is complete, the mixture is stirred for 3 hours to obtain the animal fur waste extract.

[0208] In step S2, the first wash involves washing the degreased leather twice with twice its mass of water to obtain a first-wash leather; the neutralization involves adding the first-wash leather to twice its mass of water, adjusting the pH to 7, stirring at 35°C for 1 hour, draining the water, and obtaining a neutralized washed leather; the second wash involves washing the neutralized washed leather twice with twice its mass of water to obtain a second-wash leather.

[0209] In step S3, the mass ratio of the second-washed leather to the antibacterial solution is 1:5; the process conditions for the immersion treatment are: 300W ultrasonic oscillation treatment for 40 minutes.

[0210] In step S3, the antibacterial solution is prepared by the following method:

[0211] (A) First, dry the agave until the moisture content is less than 5 wt%, then pulverize it to 80 mesh to obtain agave powder;

[0212] (B) Then, the agave powder was stirred and dispersed in 20 times its weight of water, irradiated with microwave at 600W for 10 minutes, and the filtrate was collected by filtration.

[0213] (C) Finally, add chitosan-modified nano-hydroxyapatite to the filtrate and treat with ultrasonic vibration at 300W for 30 minutes to obtain the antibacterial solution.

[0214] The mass ratio of agave powder to chitosan-modified nano-hydroxyapatite is 10:5.

[0215] Chitosan-modified nano-hydroxyapatite was prepared by the following method: 1g of hydroxypropyltrimethylammonium chloride chitosan was first dispersed in 5L of deionized water to obtain a chitosan aqueous solution. Then, 1g of nano-hydroxyapatite was added to the chitosan aqueous solution. The mixture was ultrasonically oscillated at 200W for 50 minutes at 5℃. The supernatant was collected by centrifugation at room temperature and the unbound material was removed by microporous membrane filtration.

[0216] In step S4, the specific method of retanning is as follows: soak the antibacterial treated leather in 40°C water at twice its weight for 40 minutes, add the retanning agent, rotate the drum for 2 hours, and then drain the liquid; the mass ratio of antibacterial treated leather to retanning agent is 1:0.8.

[0217] In step S4, the retanning agent is obtained by mixing acrylic retanning agent (RG-BR02, Weifang Jintai Materials Factory) and sodium montmorillonite at a mass ratio of 1:0.2.

[0218] In step S5, the mass ratio of retanned leather to fatliquoring agent is 100:0.3. The specific method of fatliquoring treatment is as follows: soak the retanned leather in 60°C water at twice its weight for 20 minutes, add the fatliquoring agent, rotate the drum for 2 hours, and then drain the liquid.

[0219] In step S5, the fatliquoring agent is obtained by mixing sulfite fish oil, cow hoof oil, and polyethylene glycol 400 dioleate in a mass ratio of 1:1:0.3.

[0220] The performance of the leather fabrics obtained in Examples 1-3 and Comparative Examples 1-5 was tested, specifically according to GB / T20944.3-2008 "Evaluation of antimicrobial properties of textiles - Part 3: Shaking method", to test their antimicrobial activity against Staphylococcus aureus, Escherichia coli, and Candida albicans. The results are shown in Table 1.

[0221] Table 1. Comparison of antibacterial properties

[0222]

[0223] As shown in Table 1, the leather fabrics obtained in Examples 1-3 all exhibit good antibacterial properties against Staphylococcus aureus, Escherichia coli, and Candida albicans.

[0224] Comparative Example 1 omitted chitosan-modified nano-hydroxyapatite, Comparative Example 2 omitted 1-butyl-3-methylimidazolium chloride, Comparative Example 3 omitted 1-butyl-3-methylimidazolium hexafluorophosphate, Comparative Example 4 omitted decyl glucoside, and Comparative Example 5 did not modify montmorillonite. Its antibacterial properties and water resistance were significantly worse. This indicates that the antibacterial components of agave and chitosan-modified nano-hydroxyapatite work synergistically to improve antibacterial properties. Furthermore, the chitosan-modified nano-hydroxyapatite acts as a load for the antibacterial components of agave, making it more water-resistant. Degreasing and retanning treatments further improve water resistance.

[0225] The present invention has been illustrated through the above embodiments, but the present invention is not limited to the above embodiments, that is, it does not mean that the present invention must rely on the above embodiments to be implemented. Those skilled in the art should understand that any improvements to the present invention, equivalent substitutions of individual raw materials in the product of the present invention, additions of auxiliary components, and selection of specific methods, etc., all fall within the protection scope and disclosure scope of the present invention.

Claims

1. A method for preparing an antibacterial leather fabric, characterized in that, The specific steps are as follows: S1. First, the animal hide is degreased using a degreasing agent solution to obtain degreased hide; S2. One wash, neutralization, a second wash, to obtain a double-washed leather; S3 Then, the second-washed leather is completely immersed in the antibacterial solution for soaking treatment to obtain antibacterial treated leather. S4. The antibacterial treated leather is then retanned using a retanning agent to obtain retanned leather; S5. Finally, the retanned leather is fatliquored, dyed, and fixed to obtain the antibacterial leather fabric. In step S1, the degreasing agent solution is prepared by mixing the following components in parts by weight: 3-4 parts of 1-butyl-3-methylimidazolium chloride, 4-5 parts of 1-butyl-3-methylimidazolium hexafluorophosphate, 8-10 parts of decyl glucoside, and 100 parts of animal fur waste extract. In step S3, the antibacterial solution is prepared by the following method: (A) First, dry the agave until the moisture content is less than 5 wt%, then pulverize it to 80-100 mesh to obtain agave powder; (B) Then, stir and disperse the agave powder in 20 to 25 times its weight of water, irradiate with microwave at 600 to 750 W for 10 to 12 minutes, filter and collect the filtrate; (C) Finally, add chitosan-modified nano-hydroxyapatite to the filtrate and treat with ultrasonic vibration at 300-400W for 30-40 minutes to obtain the antibacterial solution.

2. The preparation method according to claim 1, characterized in that, In step S1, the animal hide is selected from any one of cowhide, pigskin, or sheepskin.

3. The preparation method according to claim 1, characterized in that, In step S1, after cleaning the animal hide, it is completely immersed in a degreasing agent solution with a weight of 12 to 15 times its weight, left to stand for 2 to 3 hours, and the pH is adjusted to 2 to 3 using a 20 to 30% formic acid aqueous solution. The mixture is then rotated in a drum for 2 to 3 hours, and the liquid is drained.

4. The preparation method according to claim 1, characterized in that, In step S2, the first water wash involves washing the degreased leather 2-3 times with 2-3 times its mass of water to obtain the first water-washed leather; the neutralization involves adding the first water-washed leather to 2-3 times its mass of water, then adjusting the pH to 6-7 with a 1-2 mol / L sodium bicarbonate aqueous solution, stirring at 35-40℃ for 1-2 hours, draining the water to obtain the neutralized water-washed leather; the second water wash involves washing the neutralized water-washed leather 2-3 times with 2-3 times its mass of water to obtain the second water-washed leather.

5. The preparation method according to claim 1, characterized in that, In step S3, the mass ratio of the second-washed leather to the antibacterial solution is 1:5-6; the process conditions for the immersion treatment are: ultrasonic oscillation treatment at 300-400W for 40-50 minutes.

6. The preparation method according to claim 1, characterized in that, In step S4, the specific method of retanning is as follows: soak the antibacterial treated leather in 40-50°C water at 2-3 times its weight for 40-50 minutes, add the retanning agent, rotate the drum for 2-3 hours, and then drain the liquid; the mass ratio of antibacterial treated leather to retanning agent is 1:0.8-1.

7. The preparation method according to claim 1, characterized in that, In step S5, the mass ratio of retanned leather to fatliquoring agent is 100:0.3-0.

4. The specific method of fatliquoring treatment is as follows: soak the retanned leather in 2-3 times its weight of water at 60-65°C for 20-30 minutes, add fatliquoring agent, rotate the drum for 2-3 hours, and then drain the liquid.

8. An antibacterial leather fabric, obtained by the preparation method described in any one of claims 1 to 7.

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