An antibacterial medical nonwoven fabric

Abstract

This invention relates to an antibacterial medical nonwoven fabric, comprising a nonwoven layer and an antibacterial layer. The nonwoven layer, by weight, comprises: 100 parts polypropylene, 3-8 parts antibacterial powder, and 2-5 parts nanoparticles. The antibacterial layer is formed by electrospinning with an electrospinning solution and covers the surface of the nonwoven layer. The nanoparticles include modified nano-silica and an antibacterial core shell, with a mass ratio of 1:(2-5). The antibacterial core shell is prepared from cerium nitrate, lanthanum nitrate, sodium tungstate, magnesium nitrate, and carboxymethyl chitosan. The added antibacterial powder is an organic material, which can be better dispersed in the polypropylene material. The modified nano-silica is less prone to agglomeration, improving its dispersibility in the nonwoven layer and its binding ability with the antibacterial powder. The antibacterial core shell has excellent antibacterial properties, and the antibacterial layer also enhances the antibacterial ability of the antibacterial layer, thus giving the nonwoven fabric excellent antibacterial properties.

Description

Technical Field

[0001] This invention relates to the field of nonwoven fabric production technology, specifically to an antibacterial medical nonwoven fabric. Background Technology

[0002] Non-woven fabric, also known as non-woven cloth, is a type of fabric that can be formed without the spinning and weaving process. It is made by orienting or randomly arranging short textile fibers or filaments into a web structure, then reinforcing it through hydroentangling, needle punching, or thermal bonding, and finally finishing to create a non-woven fabric. Non-woven fabric is a soft, breathable, planar fiber product that does not easily produce fiber lint and is characterized by moisture resistance, breathability, flexibility, lightness, flame retardancy, non-toxicity, odorlessness, low price, and recyclability.

[0003] Nonwoven fabrics have historically been more widely used in the medical field, and the specific requirements of this field place high demands on the antibacterial properties of nonwoven fabrics. To improve the antibacterial properties of nonwoven fabrics, silver-containing antibacterial materials are often added, which increases the cost. For example, Chinese patent CN1346905A discloses a method for manufacturing silver-loaded antibacterial composite nonwoven fabric. This method adds 25-50% by weight of silver-loaded antibacterial material, which is then granulated, spun into a web, and then hydroentangled with cotton fiber web or wood pulp fiber web. This method improves the antibacterial properties of the nonwoven fabric by adding a large amount of silver-loaded antibacterial material, inevitably increasing the cost of raw materials. Summary of the Invention

[0004] This invention provides an antibacterial medical nonwoven fabric to solve the above-mentioned problems.

[0005] The technical solution adopted in this invention is: an antibacterial medical nonwoven fabric, which includes a nonwoven fabric layer and an antibacterial layer. The nonwoven fabric layer comprises the following components by weight: 100 parts polypropylene, 3-8 parts antibacterial powder, and 2-5 parts nanoparticles. The antibacterial powder has the structural formula shown in Formula 1.

[0006]

[0007] The antibacterial layer is formed by electrospinning with an electrospinning solution and covers the surface of the nonwoven fabric layer.

[0008] Preferably, the nanoparticles comprise modified nano-silica and an antibacterial core shell, with a mass ratio of 1:(2-5), wherein the antibacterial core shell comprises the following components: cerium nitrate, lanthanum nitrate, sodium tungstate, magnesium nitrate, and carboxymethyl chitosan.

[0009] Preferably, the preparation method of modified nano-silica includes: activating nano-silica in a drying oven at 120°C for 3 hours, adding it to toluene, stirring, adding 15% by mass of γ-aminopropyltriethoxysilane to the nano-silica, reacting at 75°C for 10 hours, and obtaining modified nano-silica after cooling, centrifugation, washing, and drying.

[0010] Preferably, the method for preparing the antibacterial core shell includes: dissolving cerium nitrate, lanthanum nitrate, sodium tungstate, and magnesium nitrate in water, adjusting the pH to 7-8, adding hexadecyltrimethylammonium bromide, reacting at 80°C for 6 hours, then adding γ-aminopropyltriethoxysilane and carboxymethyl chitosan to the water, continuing the reaction at 80°C for 5 hours, and obtaining the product after post-treatment; the mass ratio of cerium nitrate, lanthanum nitrate, sodium tungstate, magnesium nitrate, hexadecyltrimethylammonium bromide, γ-aminopropyltriethoxysilane, and carboxymethyl chitosan is 1:0.3:10:0.4:0.8:0.1:2.

[0011] Preferably, the electrospinning solution of the antibacterial layer comprises the following components by weight: 10 parts polyacrylamide, 30-80 parts water, 0.1-0.5 parts carboxylated carbon nanotubes, 1 part magnesium chloride, and 10-20 parts acetone. The above components are dissolved at 40-70°C for 2 hours to obtain the solution. The electrospinning solution is then spun by an electrospinning machine and applied to the surface of the nonwoven fabric layer.

[0012] Preferably, the DC voltage of the electrospinning machine is 10-30kV, the extrusion rate of the electrospinning solution is 1ml / h, the distance between the needle and the surface of the nonwoven fabric layer is 15cm, and the spinning time is 20 minutes.

[0013] Preferably, the preparation method of the nonwoven fabric includes the following steps: (1) mixing antibacterial powder, nanoparticles and 6% by weight of polyethylene in the raw materials, extruding and granulating to obtain antibacterial masterbatch;

[0014] (2) The antibacterial masterbatch is mixed with the remaining weight of polyethylene to obtain uniformly mixed particles, and the obtained particles are melt extruded, spun and laid into a web to obtain a non-woven fabric layer.

[0015] (3) Use an electrospinning machine to spin on the surface of the nonwoven fabric layer obtained in step (2), and after curing, obtain a nonwoven fabric covered with an antibacterial layer.

[0016] Compared with the prior art, the present invention has the following advantages: (1) The non-woven fabric layer of the present invention contains antibacterial powder. The added antibacterial powder has antioxidant properties, which can destroy the cell membrane of bacteria, inhibit the biosynthesis of bacteria, and kill bacteria. At the same time, the antibacterial powder can also inhibit the adhesion of bacteria and the formation of biofilm, thereby improving the antibacterial properties of the non-woven fabric layer.

[0017] (2) Nanoparticles are also added to the nonwoven fabric layer. These nanoparticles include modified nano-silica and antibacterial core shell. The modified silica is not prone to agglomeration and the resulting modified nano-silica is aminated, which improves its dispersibility in the nonwoven fabric layer and its binding ability with antibacterial powder, thus ensuring the durability of the antibacterial performance of the nonwoven fabric layer. At the same time, the nanoparticles also include an antibacterial core shell, which is a product obtained by reacting cerium nitrate, lanthanum nitrate, magnesium nitrate, sodium tungstate, γ-aminopropyltriethoxysilane and carboxymethyl chitosan at a certain temperature. The product has cerium tungstate as the core, which is doped with elements such as magnesium and lanthanum, and the core is wrapped with carboxymethyl chitosan. Carboxymethyl chitosan, as well as cerium tungstate, magnesium and lanthanum, all have antibacterial properties, which makes the antibacterial core shell have excellent antibacterial properties. At the same time, the carboxymethyl chitosan shell also makes the antibacterial core shell easy to disperse and reduces the agglomeration of the antibacterial core shell.

[0018] (3) Electrospinning liquid is sprayed onto the surface of the nonwoven fabric layer by an electrospinning machine. After washing with water, the hydrophilicity of the antibacterial layer surface is improved, thereby improving the antibacterial ability of the antibacterial layer to a certain extent. Detailed Implementation

[0019] To better illustrate the present invention, it will now be further described in conjunction with examples.

[0020] An antibacterial medical nonwoven fabric includes a nonwoven layer and an antibacterial layer. The nonwoven layer comprises, by weight, the following components: 100 parts polypropylene, 3-8 parts antibacterial powder, and 2-5 parts nanoparticles. The antibacterial powder has the structural formula shown in Formula 1.

[0021]

[0022] The antibacterial layer is formed by electrospinning with an electrospinning solution and covers the surface of the nonwoven fabric layer.

[0023] Preferably, the nanoparticles comprise modified nano-silica and an antibacterial core shell, with a mass ratio of 1:(2-5), wherein the antibacterial core shell is prepared by comprising the following components: cerium nitrate, lanthanum nitrate, sodium tungstate, magnesium nitrate, and carboxymethyl chitosan.

[0024] Preferably, the preparation method of modified nano-silica includes: activating nano-silica in a drying oven at 120°C for 3 hours, adding it to toluene, stirring, adding 15% by mass of γ-aminopropyltriethoxysilane to the nano-silica, reacting at 75°C for 10 hours, and obtaining modified nano-silica after cooling, centrifugation, washing, and drying.

[0025] Preferably, the method for preparing the antibacterial core shell includes: dissolving cerium nitrate, lanthanum nitrate, sodium tungstate, and magnesium nitrate in water, adjusting the pH to 7-8, adding hexadecyltrimethylammonium bromide, reacting at 80°C for 6 hours, then adding γ-aminopropyltriethoxysilane and carboxymethyl chitosan to the water, continuing the reaction at 80°C for 5 hours, and obtaining the product after post-treatment; the mass ratio of cerium nitrate, lanthanum nitrate, sodium tungstate, magnesium nitrate, hexadecyltrimethylammonium bromide, γ-aminopropyltriethoxysilane, and carboxymethyl chitosan is 1:0.3:10:0.4:0.8:0.1:2.

[0026] Preferably, the electrospinning solution of the antibacterial layer comprises the following components by weight: 10 parts polyacrylamide, 30-80 parts water, 0.1-0.5 parts carboxylated carbon nanotubes, 1 part magnesium chloride, and 10-20 parts acetone. The above components are dissolved at 40-70°C for 2 hours to obtain the solution. The electrospinning solution is then spun by an electrospinning machine and applied to the surface of the nonwoven fabric layer.

[0027] Preferably, the DC voltage of the electrospinning machine is 10-30kV, the extrusion rate of the electrospinning solution is 1ml / h, the distance between the needle and the surface of the nonwoven fabric layer is 15cm, and the spinning time is 20 minutes.

[0028] Preferably, the preparation method of the nonwoven fabric includes the following steps: (1) mixing antibacterial powder, nanoparticles and 6% by weight of polyethylene in the raw materials, extruding and granulating to obtain antibacterial masterbatch;

[0029] (2) The antibacterial masterbatch is mixed with the remaining weight of polyethylene to obtain uniformly mixed particles, and the obtained particles are melt extruded, spun and laid into a web to obtain a non-woven fabric layer.

[0030] (3) Use an electrospinning machine to spin on the surface of the nonwoven fabric layer obtained in step (2), and after curing, obtain a nonwoven fabric covered with an antibacterial layer.

[0031] Example 1

[0032] An antibacterial medical nonwoven fabric is prepared by the following steps: (1) mixing 7 parts of antibacterial powder, 5 parts of nanoparticles and 6 parts of polyethylene, extruding and granulating to obtain antibacterial masterbatch; (2) mixing the antibacterial masterbatch with 94 parts of polyethylene to obtain uniformly mixed particles, and then melting, extruding, spinning and web-laying the obtained particles to obtain a nonwoven fabric layer; (3) using an electrospinning machine to spin on the surface of the nonwoven fabric layer obtained in step (2), and then curing to obtain a nonwoven fabric covered with an antibacterial layer. The structure of the antibacterial powder is shown in Formula 1. The nanoparticles include modified nano-silica in a mass ratio of 1:3 and an antibacterial core shell. The modified nano-silica is prepared by: activating the nano-silica in a drying oven at 120°C for 3 hours, adding it to toluene, stirring, and then adding 15% (by mass) of γ-aminopropyltriethoxysilane to the nano-silica. The reaction is carried out at 75°C for 10 hours. After cooling, centrifugation, washing, and drying, the modified nano-silica is obtained. The antibacterial core shell is prepared by: [The text abruptly ends here, so the translation stops as well.] Cerium nitrate, lanthanum nitrate, sodium tungstate, and magnesium nitrate are dissolved in water, and the pH is adjusted to 7-8. Then, hexadecyltrimethylammonium bromide is added, and the mixture is reacted at 80°C for 6 hours. Next, γ-aminopropyltriethoxysilane and carboxymethyl chitosan are added to the water, and the mixture is reacted at 80°C for another 5 hours. After post-treatment, the product is obtained. The mass ratio of cerium nitrate, lanthanum nitrate, sodium tungstate, magnesium nitrate, hexadecyltrimethylammonium bromide, γ-aminopropyltriethoxysilane, and carboxymethyl chitosan is 1:0.3:10:0.4:0.8:0.1:2. The electrospinning solution for the antibacterial layer comprises the following components by weight: 10 parts polyacrylamide, 60 parts water, 0.4 parts carboxylated carbon nanotubes, 1 part magnesium chloride, and 15 parts acetone. The above components are dissolved at 60°C for 2 hours to obtain the solution. The electrospinning solution is then spun on an electrospinning machine and applied to the surface of the nonwoven fabric layer. The DC voltage of the electrospinning machine is 20kV, the extrusion rate of the electrospinning solution is 1ml / h, the distance between the needle and the surface of the nonwoven fabric layer is 15cm, and the spinning time is 20 minutes.

[0033] Example 2

[0034] An antibacterial medical nonwoven fabric is prepared by the following steps: (1) mixing 3 parts of antibacterial powder, 2 parts of nanoparticles and 6 parts of polyethylene, extruding and granulating to obtain an antibacterial masterbatch; (2) mixing the antibacterial masterbatch with 94 parts of polyethylene to obtain uniformly mixed particles, and then melt-extruding, spinning and web-laying the obtained particles to obtain a nonwoven fabric layer; (3) using an electrospinning machine to spin on the surface of the nonwoven fabric layer obtained in step (2), and then curing to obtain a nonwoven fabric covered with an antibacterial layer. The structure of the antibacterial powder is shown in Formula 1. The nanoparticles include modified nano-silica in a mass ratio of 1:5 and an antibacterial core shell. The preparation method of the modified nano-silica is the same as in Example 1, and the preparation method of the antibacterial core shell is also the same as in Example 1. The electrospinning solution for the antibacterial layer comprises the following components by weight: 10 parts polyacrylamide, 80 parts water, 0.5 parts carboxylated carbon nanotubes, 1 part magnesium chloride, and 20 parts acetone. The above components are dissolved at 70°C for 2 hours to obtain the solution. The electrospinning solution is then spun by an electrospinning machine and applied to the surface of the nonwoven fabric layer. The DC voltage of the electrospinning machine is 30kV, the extrusion rate of the electrospinning solution is 1ml / h, the distance between the needle and the surface of the nonwoven fabric layer is 15cm, and the spinning time is 20 minutes.

[0035] Example 3

[0036] An antibacterial medical nonwoven fabric is prepared by the following steps: (1) mixing 8 parts of antibacterial powder, 3 parts of nanoparticles and 6 parts of polyethylene, extruding and granulating to obtain an antibacterial masterbatch; (2) mixing the antibacterial masterbatch with 94 parts of polyethylene to obtain uniformly mixed particles, and then melting, extruding, spinning and web-laying the obtained particles to obtain a nonwoven fabric layer; (3) spinning the surface of the nonwoven fabric layer obtained in step (2) using an electrospinning machine, and then curing to obtain a nonwoven fabric covered with an antibacterial layer. The structure of the antibacterial powder is shown in Formula 1. The nanoparticles include modified nano-silica in a mass ratio of 1:2 and an antibacterial core shell. The preparation method of the modified nano-silica is the same as in Example 1, and the preparation method of the antibacterial core shell is also the same as in Example 1. The electrospinning solution for the antibacterial layer comprises the following components by weight: 10 parts polyacrylamide, 30 parts water, 0.1 parts carboxylated carbon nanotubes, 1 part magnesium chloride, and 10 parts acetone. The above components are dissolved at 40°C for 2 hours to obtain the solution. The electrospinning solution is then spun by an electrospinning machine and applied to the surface of the nonwoven fabric layer. The DC voltage of the electrospinning machine is 10kV, the extrusion rate of the electrospinning solution is 1ml / h, the distance between the needle and the surface of the nonwoven fabric layer is 15cm, and the spinning time is 20 minutes.

[0037] Comparative Example 1

[0038] An antibacterial medical nonwoven fabric is prepared by the following steps: (1) mixing 7 parts of antibacterial powder, 5 parts of nanoparticles and 6 parts of polyethylene, extruding and granulating to obtain antibacterial masterbatch; (2) mixing the antibacterial masterbatch with 94 parts of polyethylene to obtain uniformly mixed particles, and then melting, spinning and web-laying the obtained particles to obtain a nonwoven fabric layer. The structure of the antibacterial powder is shown in Formula 1. The nanoparticles include modified nano-silica and antibacterial core shell in a mass ratio of 1:3. The modified nano-silica is prepared by: activating the nano-silica in a drying oven at 120°C for 3 hours, adding it to toluene, stirring and then adding γ-aminopropyltriethoxysilane with a mass fraction of 15% of nano-silica. The reaction is carried out at 75°C for 10 hours. After cooling, centrifugation, washing and drying, the modified nano-silica is obtained. The antibacterial core shell is prepared by: adding nitrocellulose to the nano-silica. Cerium nitrate, lanthanum nitrate, sodium tungstate, and magnesium nitrate are dissolved in water, and the pH is adjusted to 7-8. Then, hexadecyltrimethylammonium bromide is added, and the mixture is reacted at 80°C for 6 hours. Next, γ-aminopropyltriethoxysilane and carboxymethyl chitosan are added to the water, and the mixture is reacted at 80°C for another 5 hours. After post-treatment, the product is obtained. The mass ratio of cerium nitrate, lanthanum nitrate, sodium tungstate, magnesium nitrate, hexadecyltrimethylammonium bromide, γ-aminopropyltriethoxysilane, and carboxymethyl chitosan is 1:0.3:10:0.4:0.8:0.1:2.

[0039] Comparative Example 2

[0040] An antibacterial medical nonwoven fabric is prepared by the following steps: (1) mixing 7 parts of antibacterial powder, 5 parts of nanoparticles and 6 parts of polyethylene, extruding and granulating to obtain antibacterial masterbatch; (2) mixing the antibacterial masterbatch with 94 parts of polyethylene to obtain uniformly mixed particles, and then melting, extruding, spinning and web-laying the obtained particles to obtain a nonwoven fabric layer; (3) using an electrospinning machine to spin on the surface of the nonwoven fabric layer obtained in step (2), and then curing to obtain a nonwoven fabric covered with an antibacterial layer. The structure of the antibacterial powder is shown in Formula 1. The nanoparticles include nano-silica in a mass ratio of 1:3 and an antibacterial core shell. The antibacterial core shell is prepared by dissolving cerium nitrate, lanthanum nitrate, sodium tungstate, and magnesium nitrate in water, adjusting the pH to 7-8, adding hexadecyltrimethylammonium bromide, and reacting at 80°C for 6 hours. Then, γ-aminopropyltriethoxysilane and carboxymethyl chitosan are added to the water, and the reaction is continued at 80°C for 5 hours. After post-treatment, the powder is obtained. The mass ratio of cerium nitrate, lanthanum nitrate, sodium tungstate, magnesium nitrate, hexadecyltrimethylammonium bromide, γ-aminopropyltriethoxysilane, and carboxymethyl chitosan is 1:0.3:10:0.4:0.8:0.1:2. The electrospinning solution for the antibacterial layer comprises the following components by weight: 10 parts polyacrylamide, 60 parts water, 0.4 parts carboxylated carbon nanotubes, 1 part magnesium chloride, and 15 parts acetone. The above components are dissolved at 60°C for 2 hours to obtain the solution. The electrospinning solution is then spun on an electrospinning machine and applied to the surface of the nonwoven fabric layer. The DC voltage of the electrospinning machine is 20kV, the extrusion rate of the electrospinning solution is 1ml / h, the distance between the needle and the surface of the nonwoven fabric layer is 15cm, and the spinning time is 20 minutes.

[0041] Comparative Example 3

[0042] An antibacterial medical nonwoven fabric is prepared by the following steps: (1) mixing 7 parts of antibacterial powder, 5 parts of nanoparticles and 6 parts of polyethylene, extruding and granulating to obtain an antibacterial masterbatch; (2) mixing the antibacterial masterbatch with 94 parts of polyethylene to obtain uniformly mixed particles, and then melting, extruding, spinning and web-laying the obtained particles to obtain a nonwoven fabric layer; (3) spinning the surface of the nonwoven fabric layer obtained in step (2) using an electrospinning machine, and then curing to obtain a nonwoven fabric covered with an antibacterial layer. The structure of the antibacterial powder is shown in Formula 1. The nanoparticles include modified nano-silica. The modified nano-silica is prepared by: activating the nano-silica in a drying oven at 120°C for 3 hours, adding it to toluene, stirring and then adding 15% by mass of γ-aminopropyltriethoxysilane to the nano-silica, reacting at 75°C for 10 hours, and then cooling, centrifuging, washing and drying to obtain the modified nano-silica. The electrospinning solution for the antibacterial layer comprises the following components by weight: 10 parts polyacrylamide, 60 parts water, 0.4 parts carboxylated carbon nanotubes, 1 part magnesium chloride, and 15 parts acetone. The above components are dissolved at 60°C for 2 hours to obtain the solution. The electrospinning solution is then spun on an electrospinning machine and applied to the surface of the nonwoven fabric layer. The DC voltage of the electrospinning machine is 20kV, the extrusion rate of the electrospinning solution is 1ml / h, the distance between the needle and the surface of the nonwoven fabric layer is 15cm, and the spinning time is 20 minutes.

[0043] Comparative Example 4

[0044] An antibacterial medical nonwoven fabric is prepared by the following steps: (1) mixing 5 parts of nanoparticles with 6 parts of polyethylene, extruding and granulating to obtain an antibacterial masterbatch; (2) mixing the antibacterial masterbatch with 94 parts of polyethylene to obtain uniformly mixed particles, and then melting, extruding, spinning and web-laying the obtained particles to obtain a nonwoven fabric layer; (3) using an electrospinning machine to spin on the surface of the nonwoven fabric layer obtained in step (2), and then curing to obtain a nonwoven fabric covered with an antibacterial layer. The nanoparticles consist of modified nano-silica in a mass ratio of 1:3 and an antibacterial core shell. The modified nano-silica is prepared by activating it in a drying oven at 120°C for 3 hours, then adding it to toluene, stirring, and finally adding 15% (by mass) of γ-aminopropyltriethoxysilane. The reaction is carried out at 75°C for 10 hours. After cooling, centrifugation, washing, and drying, the modified nano-silica is obtained. The antibacterial core shell is prepared by adding cerium nitrate, lanthanum nitrate, and... Sodium tungstate and magnesium nitrate are dissolved in water, and the pH is adjusted to 7-8. Then, hexadecyltrimethylammonium bromide is added, and the mixture is reacted at 80°C for 6 hours. Next, γ-aminopropyltriethoxysilane and carboxymethyl chitosan are added to the water, and the mixture is reacted at 80°C for another 5 hours. After post-treatment, the product is obtained. The mass ratio of cerium nitrate, lanthanum nitrate, sodium tungstate, magnesium nitrate, hexadecyltrimethylammonium bromide, γ-aminopropyltriethoxysilane, and carboxymethyl chitosan is 1:0.3:10:0.4:0.8:0.1:2. The electrospinning solution for the antibacterial layer comprises the following components by weight: 10 parts polyacrylamide, 60 parts water, 0.4 parts carboxylated carbon nanotubes, 1 part magnesium chloride, and 15 parts acetone. The above components are dissolved at 60°C for 2 hours to obtain the solution. The electrospinning solution is then spun on an electrospinning machine and applied to the surface of the nonwoven fabric layer. The DC voltage of the electrospinning machine is 20kV, the extrusion rate of the electrospinning solution is 1ml / h, the distance between the needle and the surface of the nonwoven fabric layer is 15cm, and the spinning time is 20 minutes.

[0045] The nonwoven fabrics prepared in Examples 1-3 and Comparative Examples 1-4 were subjected to antibacterial tests according to GB / T21510-2008. The specific data are shown in Table 1.

[0046] Table 1. Test results of antibacterial properties of nonwoven fabrics

[0047]

[0048]

[0049] The above description is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art can make several changes and improvements without departing from the overall concept of the present invention, and these should also be considered within the scope of protection of the present invention.

Claims

1. An antibacterial medical nonwoven fabric, characterized by: The non-woven fabric comprises a non-woven fabric layer and an antibacterial layer, the non-woven fabric layer comprises the following components in weight components: 100 parts of polyethylene, 3-8 parts of antibacterial powder, and 2-5 parts of nanoparticles, the antibacterial powder has a structural formula as shown in formula 1, Formula 1; The antibacterial layer is formed after electrostatic spinning of a spinning solution, and the antibacterial layer covers the surface of the non-woven fabric layer. The nanoparticles comprise modified nanosilica and bacteriostatic core-shell bodies, and the mass ratio of the two is 1:(2-5). The preparation method of the modified nanosilica comprises the following steps: activating nanosilica in a drying box at 120 DEG C for 3 hours, adding the nanosilica into toluene, stirring, adding 15% of γ-aminopropyl triethoxysilane by mass fraction, and reacting at 75 DEG C for 10 hours, and then cooling, centrifuging, washing, and drying to obtain the modified nanosilica. The preparation method of the bacteriostatic core-shell bodies comprises the following steps: dissolving cerium nitrate, lanthanum nitrate, sodium tungstate, and magnesium nitrate in water, adjusting the pH to 7-8, adding cetyltrimethylammonium bromide, and reacting at 80 DEG C for 6 hours, then adding γ-aminopropyl triethoxysilane and carboxymethyl chitosan into the water, and continuing to react at 80 DEG C for 5 hours, and then post-treating to obtain the bacteriostatic core-shell bodies; the mass ratio of the cerium nitrate, the lanthanum nitrate, the sodium tungstate, the magnesium nitrate, the cetyltrimethylammonium bromide, the γ-aminopropyl triethoxysilane, and the carboxymethyl chitosan is 1:0.3:10:0.4:0.8:0.1:

2. The electrostatic spinning solution of the antibacterial layer comprises the following components in weight components: 10 parts of polyacrylamide, 30-80 parts of water, 0.1-0.5 parts of carboxylated carbon nanotubes, 1 part of magnesium chloride, and 10-20 parts of acetone, the components are dissolved at 40-70 DEG C for 2 hours to obtain the electrostatic spinning solution, and the electrostatic spinning solution is spun by an electrostatic spinning machine to cover the surface of the non-woven fabric layer.

2. The antibacterial nonwoven fabric according to claim 1, wherein: The direct current voltage of the electrostatic spinning machine is 10-30 kV, the extrusion rate of the electrostatic spinning solution is 1 ml / h, the distance between the needle and the surface of the non-woven fabric layer is 15 cm, and the spinning time is 20 minutes.

3. The antibacterial nonwoven fabric according to claim 1, wherein: The preparation method of the non-woven fabric comprises the following steps: (1) mixing the antibacterial powder and the nanoparticles with 6% of the polyethylene by weight components, extruding, and granulating to obtain antibacterial master batches; (2) mixing the antibacterial master batches with the remaining polyethylene by weight components to obtain uniformly mixed particles, and melt-extruding, spinning, and webbing the particles to obtain a non-woven fabric layer; and (3) spinning on the surface of the non-woven fabric layer obtained in step (2) by using an electrostatic spinning machine, and solidifying to obtain a non-woven fabric covered with an antibacterial layer. ​ ​

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