Nano-antibacterial layered fabric, preparation method thereof and nano-antibacterial western-style clothes

Abstract

The invention relates to the technical field of antibacterial fabrics, in particular to a nano-antibacterial layered fabric, a preparation method thereof and nano-antibacterial western-style clothes. The nano antibacterial layered fabric comprises a middle layer, a bottom layer adhered to one side of the middle layer, and a surface layer adhered to the other side of the middle layer, wherein the bottom layer is made of nano-antibacterial cloth, the middle layer is made of a polytetrafluoroethylene garment film, and the surface layer is made of knitted fabric or woven fabric. Wherein the nano antibacterial fabric is prepared by the following steps: adding dopamine and amino-terminated polyamidoamine into a Tris-HCl solution with the pH value of 8-9, adding an activated fabric into the solution, carrying out ultrasonic treatment at 40-50 DEG C for 1-2 hours, taking out, washing and carrying out vacuum drying. According to the fabric, a multi-layer structure is adopted, the bottom layer is made of the nano-antibacterial cloth, the nano-antibacterial particles are added into the nano-antibacterial cloth, growth of bacteria and generation of peculiar smell are effectively inhibited, and the waterproof performance and the air permeability of the fabric are effectively improved in cooperation with the PTEF thin film of the middle layer.

Description

Technical Field

[0001] The invention relates to the technical field of antibacterial fabrics, in particular to a nano antibacterial layered fabric and a preparation method thereof, and a nano antibacterial suit. Background Art

[0002] There are various bacteria, fungi and molds in the human living environment, the representative ones are Staphylococcus aureus, Escherichia coli, Candida albicans and Pseudomonas aeruginosa, etc. Textile fabrics are one of the media for microorganisms to directly or indirectly spread diseases. In order to meet people's high requirements for hygiene functions, the antibacterial and breathable properties of textiles are very necessary.

[0003] At present, most of the suits on the market are made of ordinary fabrics. Although they can meet basic wearing needs, they are not good in terms of antibacterial and breathability. After wearing for a long time, suits are prone to odor, affecting the wearing experience and health. Since suit fabrics have high requirements for comfort and safety, the human body is often easily soaked in suit fabrics due to sweating, making suit fabrics a breeding ground for bacteria and causing harm to the human body. Therefore, it is necessary to perform antibacterial treatment on suit fabrics.

[0004] There are two main methods for producing antibacterial fabrics: one is to add antibacterial agents during the preparation of fibers to form chemical fibers with antibacterial properties; the other is to attach the antibacterial agents to the fabrics through post-treatment processes such as dipping and spraying after the fabrics are prepared.

[0005] At present, fabrics are immersed in antibacterial solutions, but the fabrics cannot maintain their antibacterial function for a long time. After the fabrics are made into clothes and worn, the antibacterial components are easily washed out when they are repeatedly washed in a washing machine and soaked in water, so the antibacterial effect will decrease or even disappear. At the same time, the fabrics that have undergone antibacterial post-treatment have a protective film formed on the surface of the fabrics, and their air permeability efficiency is also low, which cannot meet the requirements of suit fabrics for air permeability.

[0006] With the development of the times, people have higher and higher requirements for fabrics. The development of fabrics that can meet consumer needs plays an increasingly important role in the production of suit fabrics. Waterproof, breathable and antibacterial suit fabrics can block the invasion of bad weather from the outside world, and even discharge sweat and moisture generated by human body during exercise, with good antibacterial and antibacterial effects, providing good comfort for the human body. Therefore, suit fabrics with long-lasting antibacterial and waterproof and breathable properties have gradually attracted widespread attention. Summary of the invention

[0007] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a nano antibacterial layered fabric and a preparation method thereof and a nano antibacterial suit.

[0008] A nano antibacterial layered fabric, such asFigure 1 As shown, it includes: a middle layer and a bottom layer adhered to one side of the middle layer, and a surface layer adhered to the other side of the middle layer; wherein the bottom layer is made of nano antibacterial fabric, the middle layer is made of polytetrafluoroethylene clothing film, and the surface layer is knitted fabric or woven fabric.

[0009] Preferably, the nano antibacterial fabric is prepared by the following steps: adding dopamine and amino-terminated polyamidoamine to a Tris-HCl solution with a pH of 8-9, adding activated fabric thereto, ultrasonically treating at 40-50° C. for 1-2 h, taking out, washing, and vacuum drying.

[0010] Preferably, the mass ratio of dopamine, amino-terminated polyamidoamine and activated fabric is 1-2:0.1-1:35-70.

[0011] Preferably, the ultrasound frequency is 5-12 kHz.

[0012] Preferably, the activated fabric is prepared by the following steps: blending tourmaline powder, stearic acid and poly(trimethylene terephthalate) and extruding, granulating, melt spinning, laying a mesh, hot rolling reinforcement, and activating with ammonia plasma for 10-20 minutes.

[0013] Preferably, the mass ratio of tourmaline powder, stearic acid and poly(trimethylene terephthalate) is 1-3:0.1-1:50-100.

[0014] Preferably, the extrusion temperature is 220-250°C.

[0015] Preferably, during the melt spinning process, the diameter of the spinneret hole is 0.2 mm and the aspect ratio is 2.5.

[0016] Preferably, the plasma activation power is 220-260W, and the plasma activation pressure is 100-150Pa.

[0017] Preferably, the tourmaline powder is pretreated tourmaline powder, which is specifically prepared by the following steps: mixing graphene oxide and tourmaline powder and ball-milling them evenly, adding cerium nitrate and water for ultrasonic treatment for 10-20 minutes, adjusting the pH value of the system to 8-9, continuing the ultrasonic treatment for 1-2 hours, filtering, washing, vacuum drying, and crushing.

[0018] Preferably, the mass ratio of graphene oxide, tourmaline powder and cerium nitrate is 0.1-0.5:1-3:0.01-0.1.

[0019] The preparation method of the nano antibacterial layered fabric comprises the following steps: laying the nano antibacterial fabric flat, adhering a polytetrafluoroethylene clothing film on one side of the fabric, and then adhering a knitted fabric or a woven fabric on the surface of the polytetrafluoroethylene clothing film.

[0020] A nano antibacterial suit, such as Figure 1As shown, the fabric comprises: the above-mentioned nano antibacterial layered fabric and inner lining fabric sewn together, wherein the bottom layer of the nano antibacterial layered fabric is attached to the surface of the inner lining fabric.

[0021] Beneficial effects:

[0022] The present invention provides a nano antibacterial layered fabric, which adopts a multi-layer structure, including a bottom layer, a middle layer and a surface layer. The bottom layer adopts nano antibacterial cloth, and nano antibacterial particles are added to the nano antibacterial cloth to effectively inhibit the growth of bacteria and the generation of odor; the middle layer selects a PTEF film to improve the waterproofness and breathability of the fabric, and the surface layer adopts high-quality knitted fabric or woven fabric, so as to ensure the comfort and appearance of wearing.

[0023] The present invention adopts graphene oxide and tourmaline powder for compound grinding, and the dispersion uniformity between them is extremely good. By depositing nano rare earth on the surface of both, and then blending with polytrimethylene terephthalate for spinning, the obtained spinning fiber not only has excellent antibacterial performance, but also has extremely long antibacterial effect, and also has deodorizing effect, and has high removal rate of ammonia, acetic acid, and isovaleric acid. Through experiments, it is found that the present invention adopts rare earth for coordination, which greatly enhances the antibacterial performance of the spinning fiber, and has significant deodorizing effect and high fabric comfort.

[0024] The present invention further uses dopamine and amino-terminated polyamidoamine to enter the activated fabric network and combine with the amino groups on the surface of the activated fabric to effectively enhance the mechanical strength of the resulting fabric. The present invention uses nano antibacterial particles, nano antibacterial fabrics and multi-layered fabrics to make the resulting nano antibacterial layered fabric have good antibacterial properties and excellent comfort and durability.

[0025] The present invention also provides a nano-antibacterial suit with excellent antibacterial performance, comfort and durability. The nano-antibacterial layered fabric and the inner lining fabric are sewn together to effectively inhibit the growth of bacteria and prevent the suit from having odor after being worn for a long time, thereby improving the comfort and health of wearing. At the same time, the addition of nano-antibacterial particles does not affect the comfort and durability of the fabric, so that the suit has a better wearing experience and service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 Schematic diagram of the structure of nano antibacterial suit fabric; 1 is the nano antibacterial layered fabric, 2 is the inner lining, 11 is the surface layer of the nano antibacterial layered fabric, 12 is the middle layer of the nano antibacterial layered fabric, and 13 is the bottom layer of the nano antibacterial layered fabric.

[0027] Figure 2 Schematic diagram of the structure of the nano antibacterial suit.

[0028] Figure 3 This is a real photo of the nano antibacterial suit.

[0029] Figure 4 This is a comparison chart of the breaking strength and tearing strength of the nano antibacterial fabrics obtained in Example 5, Example 6, Comparative Example 1, and Comparative Example 2.

[0030] Figure 5 This is a graph showing the change in antibacterial rate of the nano antibacterial fabrics obtained in Example 5, Example 6, Comparative Example 1, and Comparative Example 2 against Staphylococcus aureus.

[0031] Figure 6 This is a graph showing the change in antibacterial rate of the nano antibacterial fabrics obtained in Example 5, Example 6, Comparative Example 1, and Comparative Example 2 against Escherichia coli.

[0032] Figure 7 This is a graph showing the change in antibacterial rate of the nano antibacterial fabrics obtained in Example 5, Example 6, Comparative Example 1, and Comparative Example 2 against Candida albicans.

[0033] Figure 8 This is a comparison chart of the removal rates of ammonia, acetic acid, and isovaleric acid by the nano antibacterial fabrics obtained in Example 5, Example 6, Comparative Example 1, and Comparative Example 2.

[0034] Fig. 9 It is a comparison chart of the moisture permeability and water pressure resistance of the nano antibacterial layered fabrics obtained in Example 5, Example 6, Comparative Example 1, and Comparative Example 2. DETAILED DESCRIPTION

[0035] The present invention will be further explained below in conjunction with specific embodiments.

[0036] Example 1

[0037] A nano antibacterial layered fabric comprises a polytetrafluoroethylene clothing film and a bottom layer adhered to one side of the polytetrafluoroethylene clothing film and a wool woven fabric adhered to the other side of the polytetrafluoroethylene clothing film; wherein the bottom layer is made of nano antibacterial cloth.

[0038] The nano antibacterial fabric is prepared by the following steps: 10 g dopamine and 1 g amino-terminated polyamidoamine are added to 500 g Tris-HCl solution with a pH value of 8-9, 350 g activated fabric is added thereto, ultrasonic treatment is carried out at a temperature of 40°C for 1 hour, the ultrasonic frequency is 5 kHz, the fabric is taken out, washed with deionized water, and vacuum dried.

[0039] The activated fabric is prepared by the following steps: 10g tourmaline powder, 1g stearic acid and 500g poly(trimethylene terephthalate) are mixed, and the mixture is extruded through a twin-screw extruder at a temperature of 220°C, followed by granulation and melt spinning, wherein the spinneret hole diameter of the spinneret is 0.2mm and the aspect ratio is 2.5, mesh laying and hot rolling reinforcement are performed, and ammonia is used as the activation gas for plasma activation treatment for 10 minutes, the treatment power is 220W, and the treatment pressure is 100Pa.

[0040] The preparation method of the nano antibacterial layered fabric comprises the following steps: laying the nano antibacterial fabric flat, adhering a polytetrafluoroethylene clothing film on one side of the fabric, and then adhering a wool woven fabric on the surface of the polytetrafluoroethylene clothing film.

[0041] Example 2

[0042] A nano antibacterial layered fabric comprises a polytetrafluoroethylene clothing film and a bottom layer adhered to one side of the polytetrafluoroethylene clothing film and a wool woven fabric adhered to the other side of the polytetrafluoroethylene clothing film; wherein the bottom layer is made of nano antibacterial cloth.

[0043] The nano antibacterial fabric is prepared by the following steps: 20g dopamine and 10g amino-terminated polyamidoamine are added to 1000g Tris-HCl solution with a pH value of 8-9, 700g activated fabric is added thereto, ultrasonic treatment is carried out at a temperature of 50°C for 2h and an ultrasonic frequency of 12kHz, the fabric is taken out, washed with deionized water, and vacuum dried.

[0044] The activated fabric is prepared by the following steps: 30g tourmaline powder, 10g stearic acid and 1000g poly(trimethylene terephthalate) are mixed, and the mixture is extruded through a twin-screw extruder at a temperature of 250°C, followed by granulation and melt spinning, wherein the spinneret hole diameter of the spinneret is 0.2mm and the aspect ratio is 2.5, mesh laying and hot rolling reinforcement are performed, and ammonia is used as the activation gas for plasma activation treatment for 20 minutes, the treatment power is 260W, and the treatment pressure is 150Pa.

[0045] The preparation method of the nano antibacterial layered fabric comprises the following steps: laying the nano antibacterial fabric flat, adhering a polytetrafluoroethylene clothing film on one side of the fabric, and then adhering a wool woven fabric on the surface of the polytetrafluoroethylene clothing film.

[0046] Example 3

[0047] A nano antibacterial layered fabric comprises a polytetrafluoroethylene clothing film and a bottom layer adhered to one side of the polytetrafluoroethylene clothing film and a wool woven fabric adhered to the other side of the polytetrafluoroethylene clothing film; wherein the bottom layer is made of nano antibacterial cloth.

[0048] The nano antibacterial fabric is prepared by the following steps: 12 g dopamine and 7 g amino-terminated polyamidoamine are added to 700 g Tris-HCl solution with a pH value of 8-9, 400 g activated fabric is added thereto, ultrasonic treatment is performed at a temperature of 48°C for 80 min, the ultrasonic frequency is 9 kHz, the fabric is taken out, washed with deionized water, and vacuum dried.

[0049] The activated fabric is prepared by the following steps: 15g pretreated tourmaline powder, 7g stearic acid and 700g poly(trimethylene terephthalate) are mixed, and the mixture is extruded through a twin-screw extruder at a temperature of 240°C, followed by granulation and melt spinning, wherein the spinneret hole diameter of the spinneret is 0.2mm and the aspect ratio is 2.5; the mesh is laid, hot-rolled for reinforcement, and ammonia is used as the activation gas for plasma activation treatment for 12 minutes, the processing power is 250W, and the processing pressure is 110Pa.

[0050] The pretreated tourmaline powder is prepared by the following steps: 5g of graphene oxide and 10g of tourmaline powder are mixed and ball-milled evenly, 1g of cerium nitrate and 200g of water are added, ultrasonic treatment is performed at a frequency of 12kHz for 10min, the pH value of the system is adjusted to 8-9 with ammonia water, ultrasonic treatment is continued for 2h, filtration, washing, vacuum drying, and crushing are performed.

[0051] The preparation method of the nano antibacterial layered fabric comprises the following steps: laying the nano antibacterial fabric flat, adhering a polytetrafluoroethylene clothing film on one side of the fabric, and then adhering a wool woven fabric on the surface of the polytetrafluoroethylene clothing film.

[0052] Example 4

[0053] A nano antibacterial layered fabric comprises a polytetrafluoroethylene clothing film and a bottom layer adhered to one side of the polytetrafluoroethylene clothing film and a wool woven fabric adhered to the other side of the polytetrafluoroethylene clothing film; wherein the bottom layer is made of nano antibacterial cloth.

[0054] The nano antibacterial fabric is prepared by the following steps: 18 g dopamine and 3 g amino-terminated polyamidoamine are added to 900 g Tris-HCl solution with a pH value of 8-9, 600 g activated fabric is added thereto, ultrasonic treatment is performed at a temperature of 42°C for 100 min and an ultrasonic frequency of 6 kHz, the fabric is taken out, washed with deionized water, and vacuum dried.

[0055] The activated fabric is prepared by the following steps: 25g pretreated tourmaline powder, 3g stearic acid and 900g polytrimethylene terephthalate are mixed, and the mixture is extruded through a twin-screw extruder at a temperature of 230°C, followed by granulation and melt spinning, wherein the spinneret hole diameter of the spinneret is 0.2mm and the aspect ratio is 2.5; the mesh is laid, hot-rolled for reinforcement, and ammonia is used as the activation gas for plasma activation treatment for 18 minutes, with a processing power of 230W and a processing pressure of 130Pa.

[0056] The pretreated tourmaline powder is prepared by the following steps: 1 g of graphene oxide and 30 g of tourmaline powder are mixed and ball-milled evenly, 0.1 g of cerium nitrate and 400 g of water are added, ultrasonic treatment is performed at a frequency of 5-12 kHz for 10 minutes, the pH value of the system is adjusted to 8-9 with ammonia water, ultrasonic treatment is continued for 2 hours, filtration, washing, vacuum drying, and crushing.

[0057] The preparation method of the nano antibacterial layered fabric comprises the following steps: laying the nano antibacterial fabric flat, adhering a polytetrafluoroethylene clothing film on one side of the fabric, and then adhering a wool woven fabric on the surface of the polytetrafluoroethylene clothing film.

[0058] Example 5

[0059] A nano antibacterial layered fabric comprises a polytetrafluoroethylene clothing film and a bottom layer adhered to one side of the polytetrafluoroethylene clothing film and a wool woven fabric adhered to the other side of the polytetrafluoroethylene clothing film; wherein the bottom layer is made of nano antibacterial cloth.

[0060] The nano antibacterial fabric is prepared by the following steps: 15 g dopamine and 5 g amino-terminated polyamidoamine are added to 800 g Tris-HCl solution with a pH value of 8-9, 500 g activated fabric is added thereto, ultrasonic treatment is performed at a temperature of 45°C for 90 minutes, the ultrasonic frequency is 7.5 kHz, the fabric is taken out, washed with deionized water, and vacuum dried.

[0061] The activated fabric is prepared by the following steps: 20g pretreated tourmaline powder, 5g stearic acid and 800g polytrimethylene terephthalate are mixed, and the mixture is extruded through a twin-screw extruder at a temperature of 235°C, followed by granulation and melt spinning, wherein the spinneret hole diameter of the spinneret is 0.2mm and the aspect ratio is 2.5; the mesh is laid, hot-rolled for reinforcement, and ammonia is used as the activation gas for plasma activation treatment for 15 minutes, the processing power is 240W, and the processing pressure is 120Pa.

[0062] The pre-treated tourmaline powder is prepared by the following steps: 3g of graphene oxide and 15g of tourmaline powder are mixed and ball-milled evenly, 0.5g of cerium nitrate and 300g of water are added, ultrasonic treatment is performed at a frequency of 9kHz for 15min, the pH value of the system is adjusted to 8-9 with ammonia water, ultrasonic treatment is continued for 1.5h, filtration, washing, vacuum drying, and crushing.

[0063] The preparation method of the nano antibacterial layered fabric comprises the following steps: laying the nano antibacterial fabric flat, adhering a polytetrafluoroethylene clothing film on one side of the fabric, and then adhering a wool woven fabric on the surface of the polytetrafluoroethylene clothing film.

[0064] Example 6

[0065] A nano antibacterial layered fabric comprises a polytetrafluoroethylene clothing film and a bottom layer adhered to one side of the polytetrafluoroethylene clothing film and a wool woven fabric adhered to the other side of the polytetrafluoroethylene clothing film; wherein the bottom layer is made of nano antibacterial cloth.

[0066] The nano antibacterial fabric is prepared by the following steps: 15 g dopamine and 5 g amino-terminated polyamidoamine are added to 800 g Tris-HCl solution with a pH value of 8-9, 500 g activated fabric is added thereto, ultrasonic treatment is performed at a temperature of 45°C for 90 minutes, the ultrasonic frequency is 7.5 kHz, the fabric is taken out, washed with deionized water, and vacuum dried.

[0067] The activated fabric is prepared by the following steps: 20g tourmaline powder, 5g stearic acid and 800g polytrimethylene terephthalate are mixed, and the mixture is extruded through a twin-screw extruder at a temperature of 235°C, followed by granulation and melt spinning, wherein the spinneret hole diameter of the spinneret is 0.2mm and the aspect ratio is 2.5; the mesh is laid, hot-rolled for reinforcement, and ammonia is used as the activation gas for plasma activation treatment for 15 minutes, the processing power is 240W, and the processing pressure is 120Pa.

[0068] The preparation method of the nano antibacterial layered fabric comprises the following steps: laying the nano antibacterial fabric flat, adhering a polytetrafluoroethylene clothing film on one side of the fabric, and then adhering a wool woven fabric on the surface of the polytetrafluoroethylene clothing film.

[0069] Comparative Example 1

[0070] A nano antibacterial layered fabric comprises a polytetrafluoroethylene clothing film and a bottom layer adhered to one side of the polytetrafluoroethylene clothing film and a wool woven fabric adhered to the other side of the polytetrafluoroethylene clothing film; wherein the bottom layer is made of nano antibacterial cloth.

[0071] The nano antibacterial fabric is prepared by the following steps: 15 g dopamine and 5 g amino-terminated polyamidoamine are added to 800 g Tris-HCl solution with a pH value of 8-9, 500 g activated fabric is added thereto, ultrasonic treatment is performed at a temperature of 45°C for 90 minutes, the ultrasonic frequency is 7.5 kHz, the fabric is taken out, washed with deionized water, and vacuum dried.

[0072] The activated fabric is prepared by the following steps: 20g pretreated tourmaline powder, 5g stearic acid and 800g polytrimethylene terephthalate are mixed, and the mixture is extruded through a twin-screw extruder at a temperature of 235°C, followed by granulation and melt spinning, wherein the spinneret hole diameter is 0.2mm and the aspect ratio is 2.5; the mesh is laid and hot-rolled for reinforcement.

[0073] The pre-treated tourmaline powder is prepared by the following steps: 3g of graphene oxide and 15g of tourmaline powder are mixed and ball-milled evenly, 0.5g of cerium nitrate and 300g of water are added, ultrasonic treatment is performed at a frequency of 9kHz for 15min, the pH value of the system is adjusted to 8-9 with ammonia water, ultrasonic treatment is continued for 1.5h, filtration, washing, vacuum drying, and crushing.

[0074] The preparation method of the nano antibacterial layered fabric comprises the following steps: laying the nano antibacterial fabric flat, adhering a polytetrafluoroethylene clothing film on one side of the fabric, and then adhering a wool woven fabric on the surface of the polytetrafluoroethylene clothing film.

[0075] Comparative Example 2

[0076] A nano antibacterial layered fabric comprises a polytetrafluoroethylene clothing film and a bottom layer adhered to one side of the polytetrafluoroethylene clothing film and a wool woven fabric adhered to the other side of the polytetrafluoroethylene clothing film; wherein the bottom layer is made of nano antibacterial cloth.

[0077] The nano antibacterial fabric was prepared by the following steps: 15 g of dopamine was added to 800 g of Tris-HCl solution with a pH value of 8-9, 500 g of activated fabric was added thereto, ultrasonic treatment was performed at a temperature of 45°C for 90 min, the ultrasonic frequency was 7.5 kHz, the fabric was taken out, washed with deionized water, and vacuum dried.

[0078] The activated fabric is prepared by the following steps: 20g pretreated tourmaline powder, 5g stearic acid and 800g polytrimethylene terephthalate are mixed, and the mixture is extruded through a twin-screw extruder at a temperature of 235°C, followed by granulation and melt spinning, wherein the spinneret hole diameter of the spinneret is 0.2mm and the aspect ratio is 2.5; the mesh is laid, hot-rolled for reinforcement, and ammonia is used as the activation gas for plasma activation treatment for 15 minutes, the processing power is 240W, and the processing pressure is 120Pa.

[0079] The pre-treated tourmaline powder is prepared by the following steps: 3g of graphene oxide and 15g of tourmaline powder are mixed and ball-milled evenly, 0.5g of cerium nitrate and 300g of water are added, ultrasonic treatment is performed at a frequency of 9kHz for 15min, the pH value of the system is adjusted to 8-9 with ammonia water, ultrasonic treatment is continued for 1.5h, filtration, washing, vacuum drying, and crushing.

[0080] The preparation method of the nano antibacterial layered fabric comprises the following steps: laying the nano antibacterial fabric flat, adhering a polytetrafluoroethylene clothing film on one side of the fabric, and then adhering a wool woven fabric on the surface of the polytetrafluoroethylene clothing film.

[0081] With reference to GB / T 24218.3-2010 "Test methods for textile nonwovens Part 3: Determination of breaking strength and breaking elongation (strip method)", the breaking strength of the nano antibacterial fabrics obtained in Example 5, Example 6, Comparative Example 1 and Comparative Example 2 was measured.

[0082] With reference to GB / T 3917.3-2009 “Tear properties of textile fabrics Part 3: Determination of tear strength of trapezoidal test specimens”, the tear strength of the nano antibacterial fabrics obtained in Example 5, Example 6, Comparative Example 1 and Comparative Example 2 was measured.

[0083] like Figure 4 As shown, the breaking strength and tearing strength of the nano antibacterial fabric obtained in Example 5 are higher than those in Example 6, but there is no significant difference (P>0.05); while the breaking strength and tearing strength of the nano antibacterial fabrics obtained in Example 5 and Example 6 are much better than those in Comparative Examples 1-2 (P<0.01), which proves that the nano antibacterial fabric obtained in the present invention has excellent mechanical strength.

[0084] The applicant believes that this is because the present invention uses ammonia for plasma activation, so that the surface of the activated fabric contains a large number of amino groups, and further uses dopamine and amino-terminated polyamide amine to compound into the activated fabric network and combine with the amino groups on the surface of the activated fabric, effectively enhancing the mechanical strength of the resulting fabric.

[0085] The antibacterial properties of the nano antibacterial fabrics obtained in Example 5, Example 6, Comparative Example 1, and Comparative Example 2 were quantitatively tested with reference to GB / T 20944.3-2008 "Evaluation of Antibacterial Properties of Textiles Part 3: Oscillation Method", and each group of samples was washed using the washing method of 10.1.1 Washing Color Fastness Tester in the standard, and the antibacterial properties were tested again after washing for a corresponding number of times. Staphylococcus aureus (ATCC 6538), Escherichia coli (ATCC 11229), and Candida albicans (ATCC10231) were used as test strains.

[0086] like Figure 5-Figure 7 As shown, the initial antibacterial properties of the nano antibacterial fabrics obtained in Example 5, Example 6, Comparative Example 1, and Comparative Example 2 were all higher than 95%. As the number of washings increased, the antibacterial properties of the fabrics in each group decreased, while the antibacterial properties of the nano antibacterial fabric obtained in Example 5 were always the highest at the same number of washings (P < 0.05).

[0087] The deodorizing properties of the nano antibacterial fabrics obtained in Example 5, Example 6, Comparative Example 1, and Comparative Example 2 were determined with reference to GB / T 33610.3-2019 "Determination of Deodorizing Properties of Textiles Part 3: Gas Chromatography", using ammonia, acetic acid, and isovaleric acid as test gases.

[0088] like Figure 8 As shown, the removal rates of ammonia, acetic acid and isovaleric acid by the nano antibacterial fabrics obtained in Example 5, Comparative Example 1 and Comparative Example 2 are similar (P>0.05), and are all better than Example 6 (P<0.05).

[0089] The applicant believes that this is because the present invention uses graphene oxide and tourmaline powder for compound grinding, and the dispersion uniformity between them is extremely good. By depositing nano rare earth on the surface of both, and then blending and spinning with polytrimethylene terephthalate, the resulting spun fiber not only has excellent antibacterial properties, but also has a very long antibacterial effect, and also has a deodorizing effect, and has a high removal rate for ammonia, acetic acid, and isovaleric acid. At the same time, the present invention further uses ammonia for plasma activation, so that the surface of the activated fabric contains a large amount of amino groups, further improving the antibacterial properties of the resulting fabric, and increasing the bonding strength between dopamine, amino-terminated polyamide amine and the activated fabric, and prolonging the antibacterial effect.

[0090] With reference to GB / T 12704.1-2009 "Test method for moisture permeability of textile fabrics Part 1: Moisture absorption method", the moisture permeability of the nano antibacterial layered fabrics obtained in Example 5, Example 6, Comparative Example 1, and Comparative Example 2 was measured; with reference to JIS L1092 B "Test method for water resistance of fabrics", the water pressure resistance of the nano antibacterial layered fabrics obtained in Example 5, Example 6, Comparative Example 1, and Comparative Example 2 was measured.

[0091] like Fig. 9 As shown, the moisture permeability and water pressure resistance of each group were similar, with no significant difference (P>0.05), and all groups showed excellent waterproof and moisture permeability.

[0092] The applicant believes that this is because the present invention adopts a multi-layer structure, including a bottom layer, a middle layer and a surface layer. The bottom layer is made of nano-antibacterial fabric, and nano-antibacterial particles are added to the nano-antibacterial fabric to effectively inhibit the growth of bacteria and the generation of odor; the middle layer selects PTEF film to improve the waterproof and breathable properties of the fabric, and the surface layer uses high-quality knitted fabric or woven fabric, which can ensure the comfort and appearance of wearing.

[0093] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A nano antibacterial layered fabric, characterized in that: include: A middle layer, a bottom layer adhered to one side of the middle layer, and a surface layer adhered to the other side of the middle layer; Among them, the bottom layer is made of nano antibacterial fabric, the middle layer is made of polytetrafluoroethylene clothing film, and the surface layer is knitted fabric or woven fabric.

2. The nano antibacterial layered fabric according to claim 1, characterized in that: The nano antibacterial fabric is prepared by the following steps: dopamine and amino-terminated polyamidoamine are added to a Tris-HCl solution with a pH of 8-9, activated fabric is added thereto, ultrasonically treated at 40-50° C. for 1-2 hours, taken out, washed, and vacuum dried.

3. The nano antibacterial layered fabric according to claim 2, characterized in that: The mass ratio of dopamine, amino-terminated polyamidoamine and activated fabric is 1-2:0.1-1:35-70.

4. The nano antibacterial layered fabric according to claim 2, characterized in that: The activated fabric is prepared by the following steps: mixing tourmaline powder, stearic acid and poly(trimethylene terephthalate), extruding, granulating, melt spinning, laying, hot rolling reinforcement, and activating by ammonia plasma for 10-20 minutes.

5. The nano antibacterial layered fabric according to claim 4, characterized in that: The mass ratio of tourmaline powder, stearic acid and poly(trimethylene terephthalate) is 1-3:0.1-1:50-100.

6. The nano antibacterial layered fabric according to claim 4, characterized in that: The extrusion temperature is 220-250° C.; during the melt spinning process, the spinneret hole diameter is 0.2 mm, and the aspect ratio is 2.5; the plasma activation power is 220-260 W, and the plasma activation pressure is 100-150 Pa.

7. The nano antibacterial layered fabric according to claim 4, characterized in that: The tourmaline powder is pretreated tourmaline powder, which is specifically prepared by the following steps: mixing graphene oxide and tourmaline powder and ball-milling them evenly, adding cerium nitrate and water for ultrasonic treatment for 10-20 minutes, adjusting the pH value of the system to 8-9, continuing the ultrasonic treatment for 1-2 hours, filtering, washing, vacuum drying, and crushing.

8. The nano antibacterial layered fabric according to claim 7, characterized in that: The mass ratio of graphene oxide, tourmaline powder and cerium nitrate is 0.1-0.5:1-3:0.01-0.

1.

9. A method for preparing the nano antibacterial layered fabric according to any one of claims 1 to 8, characterized in that: The nano antibacterial fabric is laid flat, a polytetrafluoroethylene clothing film is adhered on one side of the fabric, and then a knitted fabric or a woven fabric is adhered on the surface of the polytetrafluoroethylene clothing film.

10. A nano antibacterial suit, characterized in that: include: The nano antibacterial layered fabric and the inner lining fabric according to any one of claims 1 to 8 are sewn together, and the bottom layer of the nano antibacterial layered fabric is attached to the surface of the inner lining fabric.

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