A composite nitrile glove and its preparation method and application

Abstract

The present invention relates to the field of medical protection technologies, and particularly relates to a composite nitrile glove, a preparation method thereof, and an application thereof. The composite nitrile glove comprises an antibacterial inner lining layer and an anti-slip and wear-resistant layer. Among them, the antibacterial inner lining layer comprises the following raw material components: an antibacterial material, nitrile rubber, a stabilizer, a cross-linking agent, an accelerator, and a vulcanizing agent; wherein, the antibacterial material comprises water bamboo extract and bamboo fibers with lignin nanoparticles attached to the surface; the anti-slip and wear-resistant layer comprises the following raw material components: a wear-resistant filler, nitrile rubber, high-cis polybutadiene rubber, carbon fibers coated with chlorinated ether rubber, a stabilizer, a cross-linking agent, an accelerator, and a vulcanizing agent. By utilizing the synergistic effect of each raw material, the present invention prepares a composite nitrile glove with good surface wear resistance and anti-slip performance, and excellent antibacterial performance, effectively solving the problem that existing medical antibacterial nitrile gloves cannot balance wear resistance, anti-slip performance, and antibacterial performance.

Description

Technical Field

[0001] The present invention relates to the technical field of medical protection, and particularly relates to a composite nitrile glove, a preparation method thereof and an application thereof. Background Art

[0002] Medical gloves are indispensable protective articles in medical operations. Their main function is to prevent cross-infection between medical staff and patients. Due to its good elasticity, wear resistance and chemical stability, nitrile rubber has become a commonly used material for medical gloves. However, traditional medical nitrile gloves do not have antibacterial properties themselves. During use, the gloves are easily contaminated with various bacteria, such as Staphylococcus aureus, Escherichia coli, etc. These bacteria may reproduce on the surface of the gloves, increasing the risk of cross-infection, and may also erode the hands of medical workers through the gloves, endangering the physical health of medical workers. Therefore, developing medical nitrile gloves with antibacterial properties has important clinical significance.

[0003] Currently, it has been reported that adding bacteriostatic agents during the glove preparation process can improve the antibacterial effect of nitrile gloves. However, the compatibility between the bacteriostatic agent and nitrile latex is poor, and a large amount of bacteriostatic agent needs to be added, which results in a greater impact on the wear resistance and anti-slip performance of nitrile rubber gloves, and it is impossible to balance the antibacterial performance and mechanical properties of the gloves.

[0004] Based on this, it is of great significance for the development of medical materials to develop a medical nitrile glove with good wear resistance, excellent anti-slip performance and good antibacterial performance. Summary of the Invention

[0005] Aiming at the problem that the existing medical antibacterial nitrile gloves cannot balance wear resistance, anti-slip performance and antibacterial performance, the present invention provides a composite nitrile glove, a preparation method thereof and an application thereof. The composite nitrile glove includes an antibacterial lining layer and an anti-slip and wear-resistant layer. Among them, the antibacterial lining layer includes the following raw material components: an antibacterial material, nitrile rubber, a stabilizer, a cross-linking agent, an accelerator and a vulcanizing agent; wherein, the antibacterial material includes water bamboo extract and bamboo fiber with lignin nanoparticles attached to the surface; the anti-slip and wear-resistant layer includes the following raw material components: a wear-resistant filler, nitrile rubber, high-cis polybutadiene rubber, carbon fiber coated with chlorinated ether rubber, a stabilizer, a cross-linking agent, an accelerator and a vulcanizing agent. The present invention utilizes the synergistic effect of each raw material to prepare a composite nitrile glove with good surface wear resistance and anti-slip performance, and excellent antibacterial performance, which can effectively protect the hand health of medical workers.

[0006] In order to achieve the above invention purpose, the present invention provides the following technical solutions:

[0007] The first aspect of the present invention provides a composite nitrile glove, which comprises an antibacterial lining layer and an anti-slip and wear-resistant layer. Among them, the antibacterial lining layer comprises the following raw material components in parts by mass: 5-10 parts of antibacterial material, 60-70 parts of nitrile rubber, 1-5 parts of stabilizer, 1-5 parts of accelerator, and 1-5 parts of vulcanizing agent; among them, the antibacterial material comprises water bamboo extract and bamboo fiber with lignin nanoparticles attached to the surface.

[0008] The anti-slip and wear-resistant layer comprises the following raw material components in parts by mass: 10-20 parts of wear-resistant filler, 40-60 parts of nitrile rubber, 5-10 parts of high-cis polybutadiene rubber, 5-15 parts of chlorinated ether rubber-coated carbon fiber, 1-5 parts of stabilizer, 1-5 parts of accelerator, and 1-5 parts of vulcanizing agent; among them, the wear-resistant filler is a mixture of nano-silica and carbon black.

[0009] The present invention provides a composite nitrile glove with a double-layer structure, whose internal material adopts an antibacterial nitrile rubber composite material, and the outer surface adopts an anti-slip and wear-resistant nitrile rubber composite material. Among them, water bamboo extract and bamboo fiber with lignin nanoparticles attached to the surface are added as antibacterial materials in the antibacterial lining layer. Water bamboo extract is rich in tricin and phenolic acids. Tricin has good antioxidant and anti-inflammatory effects; while phenolic acids have good antibacterial effects, interfering with the activity of key enzymes in the process of bacterial cell wall synthesis, making the bacterial cell wall unable to be assembled normally, and causing bacterial cell inactivation under the action of osmotic pressure to achieve the antibacterial purpose. And water bamboo extract can reduce the decomposition of water retention factors, increase skin water content, repair the skin barrier, and avoid skin sensitivity and redness caused by bacteria. The bamboo fiber with lignin nanoparticles attached to the surface can serve as a physical barrier, and the lignin nanoparticles on the surface of the bamboo fiber can form a physical barrier. These nanoparticles can cover the surface of the bamboo fiber, making it difficult for bacteria to directly contact the bamboo fiber and adhere to it, reducing the chance of bacteria colonizing on the fiber surface. And lignin itself has a variety of active functional groups, such as phenolic hydroxyl groups. These active groups can be slowly released from the nanoparticles and enter the surrounding environment to contact bacteria. Phenolic hydroxyl groups have good antibacterial properties, and they can destroy the cell membrane structure of bacteria. The cell membrane is the key structure for bacteria to maintain the stability of the intracellular environment and carry out material exchange. When active ingredients such as phenolic hydroxyl groups contact the cell membrane, it will cause a change in the permeability of the cell membrane, allowing important substances in the bacterial cell to leak, thereby affecting the normal metabolism and physiological functions of bacteria, and ultimately leading to the death of bacteria to achieve the antibacterial purpose.

[0010] Most of the double bonds in the high-cis polybutadiene rubber molecular chain are in cis configuration. This structure gives the molecular chain a high degree of regularity, enabling the molecular chains to be closely arranged. The closely arranged molecular chains endow the rubber with high elasticity and tensile strength. When subjected to external forces, the molecular chains can quickly stretch and recover, effectively buffering and dispersing pressure, making the gloves have good elasticity and anti-slip performance. The nano-silica and carbon black in the wear-resistant filler can interact with the high-cis polybutadiene rubber and nitrile rubber, not only enhancing the hardness and rigidity of the rubber material, but also adsorbing the rubber molecular chains to prevent the molecular chains from slipping during friction, thereby improving the wear resistance of the rubber material. The addition of chlorinated ether rubber-coated carbon fiber can form a microscopic rough surface. This microscopic rough structure can increase the contact area and friction force with the contacting object, increasing the anti-slip performance. The carbon fiber can effectively disperse these stresses with its high strength, avoiding stress concentration at a certain point and causing material damage, and enhancing the overall wear resistance of the material.

[0011] Preferably, the mass ratio of the water bamboo extract to the bamboo fiber with lignin nanoparticles attached to its surface in the antibacterial material is 1:5 - 1:8.

[0012] Preferably, the thickness of the antibacterial lining layer is 100 - 200 μm.

[0013] Preferably, the thickness of the anti-slip and wear-resistant layer is 150 - 250 μm.

[0014] Preferably, the preparation method of the water bamboo extract includes the following steps: pulverize the water bamboo and perform vacuum freeze-drying to obtain water bamboo powder; disperse the water bamboo powder in a low-boiling-point organic mixed solvent, perform ultrasonic treatment, carry out solid-liquid separation, concentrate the filtrate, purify it, and dry it to obtain the water bamboo extract.

[0015] More preferably, the low-boiling-point organic mixed solvent is ethyl acetate and ethanol with a volume ratio of 1:1 - 1:3.

[0016] More preferably, the temperature of the ultrasonic treatment is 40 - 50 °C, and the time of the ultrasonic treatment is 30 - 50 min.

[0017] More preferably, column chromatography separation is used for purification, and the eluent is dichloromethane and petroleum ether with a volume ratio of 1:2 - 1:2.5.

[0018] More preferably, the temperature of the drying is 70 - 80 °C, and the time of the drying is 6 - 10 h.

[0019] Preferably, the preparation method of the bamboo fiber with lignin nanoparticles attached to its surface includes the following steps:

[0020] S1. Dissolve lignin in a good solvent to obtain a lignin solution; slowly add the lignin solution to an anti-solvent, mix evenly, filter, wash, and dry to obtain lignin nanoparticles;

[0021] S2. Disperse bamboo fibers in an alkali solution for activation treatment to obtain pretreated bamboo fibers;

[0022] S3. Disperse the lignin nanoparticles in an alcohol solution of a coupling agent, mix evenly, add the pretreated bamboo fibers, and carry out an attachment reaction at 60 - 75 °C, filter, wash, and dry to obtain the bamboo fibers with lignin nanoparticles attached to the surface.

[0023] Further preferably, in S1, the good solvent is dimethyl sulfoxide or tetrahydrofuran; the anti-solvent is water.

[0024] Further preferably, in S1, the mass-volume ratio of lignin to the good solvent is 1 g: 2 mL - 1 g: 4 mL.

[0025] Further preferably, in S1, the rotation speed of the high-speed stirring is 1500 rpm - 1800 rpm, and the time of the high-speed stirring is 10 - 15 min.

[0026] Further preferably, in S1, the drying temperature is 80 - 90 °C, and the drying time is 3 - 5 h.

[0027] Further preferably, in S2, the mass-volume ratio of bamboo fibers to the alkali solution is 1 g: 4 mL - 1 g: 6 mL.

[0028] Further preferably, in S2, the alkali solution is a sodium hydroxide solution with a concentration of 0.5 mol / L - 1 mol / L.

[0029] Further preferably, in S2, the activation treatment temperature is 50 - 60 °C, and the activation treatment time is 20 - 30 min.

[0030] Further preferably, in S3, the mass-volume ratio of lignin nanoparticles to the alcohol solution of the coupling agent is 1 g: 5 mL - 1 g: 10 mL; wherein, the mass percentage content of the coupling agent in the alcohol solution of the coupling agent is 50% - 60%.

[0031] Further preferably, in S3, the attachment reaction time is 2 - 5 h.

[0032] Preferably, the preparation method of the chlorinated ether rubber-coated carbon fiber includes the following steps: dissolve chlorinated ether rubber in an organic solvent to obtain a chlorinated ether rubber solution; immerse short carbon fibers in the chlorinated ether rubber solution, carry out solid-liquid separation, and dry to obtain chlorinated ether rubber-coated carbon fibers.

[0033] Further preferably, the mass-volume ratio of the chlorinated ether rubber to the organic solvent is 1 g: 3 mL - 1 g: 5 mL.

[0034] Further preferably, the organic solvent is dichloromethane.

[0035] Further preferably, the length of the short carbon fiber is 0.5 mm - 1.5 mm.

[0036] Further preferably, the mass ratio of the short carbon fiber to the chlorinated ether rubber is 1: 1 - 1: 2.

[0037] Further preferably, the drying temperature is 110 - 130 °C and the drying time is 30 - 50 min.

[0038] Preferably, the wear-resistant filler is nano-silica and carbon black with a mass ratio of 1: 1 - 1: 2.

[0039] Preferably, the stabilizer is 2,6-di-tert-butyl-p-cresol.

[0040] Preferably, the accelerator is accelerator DM.

[0041] Preferably, the vulcanizing agent is dicumyl peroxide or benzoyl peroxide.

[0042] The second aspect of the present invention provides a method for preparing the composite nitrile gloves, comprising the following steps:

[0043] Step 1: Weigh the raw materials of each component of the antibacterial inner lining layer according to the designed ratio, mix them evenly, and vulcanize to obtain the antibacterial inner lining layer rubber compound;

[0044] Weigh the raw materials of each component of the anti-slip and wear-resistant layer according to the designed ratio, mix them evenly, and vulcanize to obtain the anti-slip and wear-resistant layer rubber compound;

[0045] Step 2: Stack the antibacterial inner lining layer rubber compound and the anti-slip and wear-resistant layer rubber compound, and perform compression molding to obtain the composite nitrile gloves.

[0046] Preferably, in Step 1, the vulcanizing temperature is 160 - 180 °C and the vulcanizing time is 16 - 22 h.

[0047] The third aspect of the present invention provides the application of the composite nitrile gloves in the field of medical protection.

[0048] In summary, the present invention utilizes the synergistic effect of each raw material component to obtain a composite nitrile glove with good surface wear resistance, anti-slip performance, and antibacterial performance. The technical solution of the present invention effectively solves the problem that existing medical antibacterial nitrile gloves cannot take into account wear resistance, anti-slip performance, and antibacterial performance, effectively protects the hand health of medical workers, and provides a new idea for the research and development of medical protective materials. Detailed Embodiments

[0049] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0050] Example 1

[0051] This example provides a composite nitrile glove and its preparation method, which specifically includes the following contents:

[0052] The composite nitrile glove includes an antibacterial inner lining layer and an anti-slip wear-resistant layer. Among them, the antibacterial inner lining layer includes the following raw material components in parts by mass: 8 parts of antibacterial material, 65 parts of nitrile rubber, 3 parts of 2,6-di-tert-butyl-p-cresol, 3 parts of accelerator DM, and 3 parts of dicumyl peroxide; among them, the antibacterial material includes water bamboo extract and bamboo fiber with lignin nanoparticles attached to the surface in a mass ratio of 1:6.

[0053] The anti-slip wear-resistant layer includes the following raw material components in parts by mass: 15 parts of wear-resistant filler, 50 parts of nitrile rubber, 8 parts of high-cis polybutadiene rubber, 10 parts of chlorinated ether rubber-coated carbon fiber, 3 parts of 2,6-di-tert-butyl-p-cresol, 3 parts of accelerator DM, and 3 parts of dicumyl peroxide; among them, the wear-resistant filler is a mixture of nano-silica and carbon black in a mass ratio of 1:1.5.

[0054] The preparation method of the composite nitrile glove includes the following steps:

[0055] Step 1: Weigh the raw material components of the antibacterial inner lining layer according to the designed ratio, mix them evenly, vulcanize at 170 °C for 18 h, and cool to room temperature to obtain the antibacterial inner lining layer rubber compound;

[0056] Weigh the raw material components of the anti-slip wear-resistant layer according to the designed ratio, mix them evenly, vulcanize at 175 °C for 20 h, and cool to room temperature to obtain the anti-slip wear-resistant layer rubber compound;

[0057] Step 2: Stack the antibacterial inner lining compound and the anti-slip and wear-resistant layer compound in the order from the inside out. Among them, the thickness of the antibacterial inner lining is 150 μm; the thickness of the anti-slip and wear-resistant layer is 200 μm, and then carry out molding by pressing to obtain a composite nitrile glove.

[0058] Among them, the preparation method of the water bamboo extract includes the following steps: Crush 1000 g of water bamboo and carry out vacuum freeze-drying to obtain water bamboo powder; Disperse the water bamboo powder in 2000 mL of ethyl acetate and ethanol with a volume ratio of 1:1, carry out ultrasonic treatment at 45°C for 40 min, carry out solid-liquid separation, concentrate the filtrate, and carry out purification treatment by column chromatography separation. The eluent is dichloromethane and petroleum ether with a volume ratio of 1:2, remove the solvent, and dry at 75°C for 8 h to obtain the water bamboo extract.

[0059] The preparation method of the bamboo fiber with lignin nanoparticles attached to the surface includes the following steps:

[0060] S1: Dissolve 500 g of lignin in 1500 mL of dimethyl sulfoxide to obtain a lignin solution; Slowly add the lignin solution to water, and at the same time carry out high-speed stirring at a speed of 1600 rpm for 12 min, filter, wash with water 3 times, and dry at 85°C for 4 h to obtain lignin nanoparticles;

[0061] S2: Disperse 500 g of bamboo fiber in a sodium hydroxide solution with a concentration of 0.6 mol / L, and carry out activation treatment at 55°C for 25 min to obtain pretreated bamboo fiber;

[0062] S3: Disperse the lignin nanoparticles in 3000 mL of an alcohol solution of a coupling agent, mix evenly, add the pretreated bamboo fiber, carry out an attachment reaction at 75°C for 3 h, filter, wash with ethanol 3 times, and dry to obtain the bamboo fiber with lignin nanoparticles attached to the surface.

[0063] The preparation method of the chlorinated ether rubber-coated carbon fiber includes the following steps: Dissolve 500 g of chlorinated ether rubber in 2000 mL of dichloromethane to obtain a chlorinated ether rubber solution; Immerse short carbon fibers with a length of 1 mm in the chlorinated ether rubber solution, let stand for 12 h, carry out solid-liquid separation, and dry at 120°C for 40 min to obtain the chlorinated ether rubber-coated carbon fiber.

[0064] Example 2

[0065] This example provides a composite nitrile glove and its preparation method, which specifically includes the following content:

[0066] The composite nitrile glove includes an antibacterial inner lining layer and an anti-slip and wear-resistant layer. Among them, the antibacterial inner lining layer includes the following raw material components in parts by mass: 5 parts of antibacterial material, 70 parts of nitrile rubber, 3 parts of 2,6-di-tert-butyl-p-cresol, 3 parts of accelerator DM, and 3 parts of dicumyl peroxide; among them, the antibacterial material includes water bamboo extract and bamboo fiber with lignin nanoparticles attached to the surface in a mass ratio of 1:8;

[0067] The anti-slip and wear-resistant layer includes the following raw material components in parts by mass: 15 parts of wear-resistant filler, 50 parts of nitrile rubber, 8 parts of high-cis polybutadiene rubber, 10 parts of chlorinated ether rubber-coated carbon fiber, 3 parts of 2,6-di-tert-butyl-p-cresol, 3 parts of accelerator DM, and 3 parts of dicumyl peroxide; among them, the wear-resistant filler is a mixture of nano-silica and carbon black in a mass ratio of 1:2.

[0068] The preparation method of the composite nitrile glove includes the following steps:

[0069] Step 1: Weigh the raw material components of the antibacterial inner lining layer according to the designed ratio, mix them evenly, vulcanize at 170 °C for 18 h, and cool to room temperature to obtain the antibacterial inner lining layer rubber compound;

[0070] Weigh the raw material components of the anti-slip and wear-resistant layer according to the designed ratio, mix them evenly, vulcanize at 175 °C for 20 h, and cool to room temperature to obtain the anti-slip and wear-resistant layer rubber compound;

[0071] Step 2: Stack the antibacterial inner lining layer rubber compound and the anti-slip and wear-resistant layer rubber compound in the order from the inside to the outside. Among them, the thickness of the antibacterial inner lining layer is 150 μm; the thickness of the anti-slip and wear-resistant layer is 200 μm, and it is molded by pressing to obtain the composite nitrile glove.

[0072] Among them, the preparation method of the water bamboo extract includes the following steps: Crush 1000 g of water bamboo and perform vacuum freeze-drying to obtain water bamboo powder; Disperse the water bamboo powder in 2000 mL of ethyl acetate and ethanol with a volume ratio of 1:1, perform ultrasonic treatment at 45 °C for 40 min, perform solid-liquid separation, concentrate the filtrate, and perform purification treatment by column chromatography separation. The eluent is dichloromethane and petroleum ether with a volume ratio of 1:2. Remove the solvent and dry at 75 °C for 8 h to obtain the water bamboo extract.

[0073] The preparation method of the bamboo fiber with lignin nanoparticles attached to the surface includes the following steps:

[0074] S1: Dissolve 500 g of lignin in 1500 mL of dimethyl sulfoxide to obtain a lignin solution; Slowly add the lignin solution to water, and at the same time, perform high-speed stirring at a speed of 1600 rpm for 12 min, filter, wash with water 3 times, and dry at 85 °C for 4 h to obtain lignin nanoparticles;

[0075] S2. Disperse 500 g of bamboo fiber in a sodium hydroxide solution with a concentration of 0.6 mol / L, and carry out activation treatment at 55 °C for 25 min to obtain pretreated bamboo fiber;

[0076] S3. Disperse the lignin nanoparticles in 3000 mL of an alcohol solution of the coupling agent, mix evenly, add the pretreated bamboo fiber, carry out an attachment reaction at 75 °C for 3 h, filter, wash 3 times with ethanol, and dry to obtain the bamboo fiber with lignin nanoparticles attached to the surface.

[0077] The preparation method of the chlorinated ether rubber-coated carbon fiber includes the following steps: Dissolve 500 g of chlorinated ether rubber in 2000 mL of dichloromethane to obtain a chlorinated ether rubber solution; Immerse short carbon fibers with a length of 1 mm in the chlorinated ether rubber solution, let stand for 12 h, separate the solid and liquid, and dry at 120 °C for 40 min to obtain the chlorinated ether rubber-coated carbon fiber.

[0078] Example 3

[0079] This example provides a composite nitrile glove and its preparation method, which specifically includes the following content:

[0080] The composite nitrile glove includes an antibacterial inner lining layer and an anti-slip and wear-resistant layer. Among them, the antibacterial inner lining layer includes the following raw material components in parts by mass: 10 parts of antibacterial material, 60 parts of nitrile rubber, 5 parts of 2,6-di-tert-butyl-p-cresol, 3 parts of accelerator DM, and 4 parts of dicumyl peroxide; Among them, the antibacterial material includes the water bamboo extract and the bamboo fiber with lignin nanoparticles attached to the surface in a mass ratio of 1:5;

[0081] The anti-slip and wear-resistant layer includes the following raw material components in parts by mass: 15 parts of wear-resistant filler, 50 parts of nitrile rubber, 8 parts of high-cis polybutadiene rubber, 10 parts of chlorinated ether rubber-coated carbon fiber, 3 parts of 2,6-di-tert-butyl-p-cresol, 3 parts of accelerator DM, and 3 parts of dicumyl peroxide; Among them, the wear-resistant filler is a mixture of nano-silica and carbon black in a mass ratio of 1:1.

[0082] The preparation method of the composite nitrile glove includes the following steps:

[0083] Step 1. Weigh the raw material components of the antibacterial inner lining layer according to the designed ratio, mix evenly, vulcanize at 170 °C for 18 h, and cool to room temperature to obtain the antibacterial inner lining layer rubber compound;

[0084] Weigh the raw material components of the anti-slip and wear-resistant layer according to the designed ratio, mix evenly, vulcanize at 175 °C for 20 h, and cool to room temperature to obtain the anti-slip and wear-resistant layer rubber compound;

[0085] Step 2: stack the antibacterial lining rubber material and the anti-skid and wear-resistant layer rubber material in order from inside to outside, wherein the thickness of the antibacterial lining layer is 150 μm; the thickness of the anti-skid and wear-resistant layer is 200 μm, and perform compression molding to obtain a composite nitrile glove.

[0086] The preparation method of the wild rice stem extract comprises the following steps: crushing 1000g of wild rice stem and performing vacuum freeze drying to obtain wild rice stem powder; dispersing the wild rice stem powder in 2000mL of ethyl acetate and ethanol in a volume ratio of 1:1, performing ultrasonic treatment at 45°C for 40min, performing solid-liquid separation, concentrating the filtrate, and performing purification treatment by column chromatography. The eluent is dichloromethane and petroleum ether in a volume ratio of 1:2, removing the solvent, and drying at 75°C for 8h to obtain the wild rice stem extract.

[0087] The method for preparing the bamboo fiber with lignin nanoparticles attached to the surface comprises the following steps:

[0088] S1. Dissolve 500 g of lignin in 1500 mL of dimethyl sulfoxide to obtain a lignin solution; slowly add the lignin solution into water while stirring at a speed of 1600 rpm for 12 min, filter, wash with water 3 times, and dry at 85° C. for 4 h to obtain lignin nanoparticles;

[0089] S2, dispersing 500g of bamboo fiber in a sodium hydroxide solution with a concentration of 0.6mol / L, and performing activation treatment at 55°C for 25min to obtain pretreated bamboo fiber;

[0090] S3, dispersing the lignin nanoparticles in 3000 mL of an alcohol solution of a coupling agent, mixing evenly, adding the pretreated bamboo fiber, performing an attachment reaction at 75° C. for 3 h, filtering, washing with ethanol for 3 times, and drying to obtain the bamboo fiber with lignin nanoparticles attached to the surface.

[0091] The preparation method of the chloroprene rubber coated carbon fiber comprises the following steps: dissolving 500 g of chloroprene rubber in 2000 mL of dichloromethane to obtain a chloroprene rubber solution; immersing short carbon fibers with a length of 1 mm in the chloroprene rubber solution, standing for 12 hours, separating the solid from the liquid, and drying at 120° C. for 40 minutes to obtain the chloroprene rubber coated carbon fiber.

[0092] Comparative Example 1

[0093] This comparative example provides a composite nitrile glove, which is different from Example 1 in that the antibacterial material is bamboo fiber with lignin nanoparticles attached to the surface, and other components and processes remain unchanged and will not be described again here.

[0094] Comparative Example 2

[0095] This comparative example provides a composite nitrile glove, which is different from Example 1 in that the water bamboo extract is replaced with an equal amount of konjac extract, and other components and processes remain unchanged, which will not be elaborated here.

[0096] The preparation method of the konjac extract includes the following steps: 1000 g of konjac is pulverized and then subjected to vacuum freeze-drying to obtain konjac powder; the konjac powder is dispersed in 2000 mL of ethyl acetate and ethanol with a volume ratio of 1:1, and ultrasonic treatment is carried out at 45 °C for 40 min, followed by solid-liquid separation. The filtrate is concentrated and purified by column chromatography separation. The eluent is dichloromethane and petroleum ether with a volume ratio of 1:2. The solvent is removed and dried at 75 °C for 8 h to obtain the konjac extract.

[0097] Comparative Example 3

[0098] This comparative example provides a composite nitrile glove, which is different from Example 1 in that the high-cis polybutadiene rubber is replaced with an equal amount of ethylene-propylene-diene monomer rubber, and other components and processes remain unchanged, which will not be elaborated here.

[0099] Comparative Example 4

[0100] This comparative example provides a composite nitrile glove, which is different from Example 1 in that the chlorinated ether rubber-coated carbon fiber is replaced with an equal amount of carbon fiber, and other components and processes remain unchanged, which will not be elaborated here.

[0101] In order to further demonstrate the technical effects of the present invention, the present invention conducted the following tests on the laminated rubber materials obtained in Examples 1-3 and Comparative Examples 1-4: (1) Referring to the standard of GB / T 528-2009 "Determination of tensile stress-strain properties of vulcanized rubber or thermoplastic rubber", a universal material testing machine was used to test the tensile strength and elongation at break of the gloves; (2) The anti-slip performance was tested by a portable anti-slip tester with reference to ASTM F1677-2016; (3) The wear resistance was tested with reference to GB / T 1689-2014; (4) The antibacterial performance of the gloves was tested with reference to the standard of GB 15979-2002, and the test results are shown in Table 1.

[0102] Table 1 Performance test results of each laminated rubber material

[0103]

[0104] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, or improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A composite nitrile glove, characterized in that: The composite nitrile gloves include an antibacterial lining layer and an anti-slip wear-resistant layer, wherein the antibacterial lining layer includes the following raw material components in parts by weight: 5-10 parts of antibacterial material, 60-70 parts of nitrile rubber, 1-5 parts of stabilizer, 1-5 parts of accelerator and 1-5 parts of vulcanizer; wherein the antibacterial material includes wild rice stem extract and bamboo fiber with lignin nanoparticles attached to the surface; The anti-skid and wear-resistant layer comprises the following raw material components in parts by weight: 10-20 parts of wear-resistant filler, 40-60 parts of nitrile rubber, 5-10 parts of high-cis polybutadiene rubber, 5-15 parts of chloroether rubber-coated carbon fiber, 1-5 parts of stabilizer, 1-5 parts of accelerator and 1-5 parts of vulcanizer; wherein the wear-resistant filler is a mixture of nano-silicon dioxide and carbon black; The method for preparing the wild rice stem extract comprises the following steps: crushing the wild rice stem and performing vacuum freeze drying to obtain wild rice stem powder; dispersing the wild rice stem powder in a low-boiling point organic mixed solvent, performing ultrasound, performing solid-liquid separation, concentrating the filtrate, purifying, and drying to obtain the wild rice stem extract; The method for preparing the bamboo fiber with lignin nanoparticles attached to the surface comprises the following steps: S1, dissolving lignin in a good solvent to obtain a lignin solution; slowly adding the lignin solution to an anti-solvent, mixing evenly, filtering, washing, and drying to obtain lignin nanoparticles; S2, dispersing the bamboo fibers in an alkaline solution for activation treatment to obtain pretreated bamboo fibers; S3, dispersing the lignin nanoparticles in an alcohol solution of a coupling agent, mixing evenly, adding the pretreated bamboo fiber, performing an attachment reaction at 60-75° C., filtering, washing, and drying to obtain the bamboo fiber with lignin nanoparticles attached to the surface.

2. The composite nitrile glove according to claim 1, characterized in that: The mass ratio of the wild rice stem extract in the antibacterial material to the bamboo fiber with lignin nanoparticles attached to the surface is 1:5-1:8; and / or The thickness of the antibacterial lining layer is 100-200 μm; and / or The thickness of the anti-skid and wear-resistant layer is 150-250 μm.

3. The composite nitrile glove according to claim 1, characterized in that: The low boiling point organic mixed solvent is ethyl acetate and ethanol in a volume ratio of 1:1-1:3; and / or The ultrasonic temperature is 40-50°C and the ultrasonic time is 30-50min; and / or The product is purified by column chromatography, and the eluent is dichloromethane and petroleum ether in a volume ratio of 1:2-1:2.

5.

4. The composite nitrile glove according to claim 1, characterized in that: In S1, the good solvent is dimethyl sulfoxide or tetrahydrofuran; the anti-solvent is water; and / or In S1, the mass volume ratio of the lignin to the good solvent is 1g:2mL-1g:4mL; and / or In S2, the mass volume ratio of the bamboo fiber to the alkaline solution is 1g:4mL-1g:6mL; and / or In S2, the temperature of the activation treatment is 50-60°C, and the time of the activation treatment is 20-30 minutes.

5. The composite nitrile glove according to claim 1, characterized in that: In S3, the mass volume ratio of the lignin nanoparticles to the alcohol solution of the coupling agent is 1g:5mL-1g:10mL; wherein the mass percentage of the coupling agent in the alcohol solution of the coupling agent is 50%-60%; and / or In S3, the attachment reaction time is 2-5 hours.

6. The composite nitrile glove according to claim 1, characterized in that: The preparation method of the chloroprene rubber coated carbon fiber comprises the following steps: dissolving chloroprene rubber in an organic solvent to obtain a chloroprene rubber solution; immersing short carbon fibers in the chloroprene rubber solution, separating the solid from the liquid, and drying to obtain the chloroprene rubber coated carbon fiber; and / or The wear-resistant filler is nano silicon dioxide and carbon black in a mass ratio of 1:1-1:

2.

7. The method for preparing the composite nitrile gloves according to any one of claims 1 to 6, characterized in that: The steps include: Step 1: weigh the raw materials of each component of the antibacterial lining layer according to the designed ratio, mix them evenly, and vulcanize them to obtain the antibacterial lining layer rubber material; Weigh the raw materials of various components of the anti-skid and wear-resistant layer according to the designed ratio, mix them evenly, and vulcanize them to obtain the anti-skid and wear-resistant layer rubber material; Step 2: stacking the antibacterial lining rubber material and the anti-skid and wear-resistant layer rubber material, and compression molding them to obtain composite nitrile gloves.

8. Use of the composite nitrile gloves according to any one of claims 1 to 7 in the field of medical protection.

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