Nanometer antibacterial layered fabric, preparation method thereof and nanometer antibacterial suit

Abstract

The application relates to the technical field of antibacterial fabrics, in particular to a nano-antibacterial layered fabric, a preparation method thereof and a nano-antibacterial suit. 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 fabric, the middle layer is made of a polytetrafluoroethylene clothing film, and the surface layer is a knitted fabric or a woven fabric. The nano-antibacterial fabric is prepared by the following steps: adding dopamine and an amino-terminated polyamide amine into a Tris-HCl solution with pH=8-9, adding an activated fabric into the solution, ultrasonic treatment at 40-50 DEG C for 1-2 hours, taking out, washing and vacuum drying. The application adopts a multi-layer structure, the bottom layer is made of nano-antibacterial fabric, nano-antibacterial particles are added into the nano-antibacterial fabric, the growth of bacteria and the generation of peculiar smell are effectively inhibited, and the waterproofness and air permeability of the fabric are effectively improved in cooperation with the middle layer PTEF film.

Description

Technical Field

[0001] This invention relates to the field of antibacterial fabric technology, and in particular to a nano-antibacterial layered fabric, its preparation method, and a nano-antibacterial suit. Background Technology

[0002] The human environment contains a wide variety of bacteria, fungi, and molds, including representative species such as Staphylococcus aureus, Escherichia coli, Candida albicans, and Pseudomonas aeruginosa. Textile fabrics are one of the mediums through which microorganisms directly or indirectly transmit diseases. To meet people's high demands for hygiene, the antibacterial and breathable properties of textiles are essential.

[0003] Currently, most commercially available suits are made of ordinary fabrics, which, while meeting basic wearing needs, are insufficient in terms of antibacterial properties and breathability. After prolonged wear, suits are prone to developing odors, affecting the wearing experience and health. Because suit fabrics have high requirements for comfort and safety, but the human body often soaks the fabric with sweat, creating a breeding ground for bacteria and posing a health hazard, it is necessary to treat suit fabrics with antibacterial agents.

[0004] There are two main methods for producing antibacterial fabrics: one is to add antibacterial agents during the fiber preparation process to form chemical fibers with antibacterial properties; the other is to attach antibacterial agents to the fabric through post-processing techniques such as impregnation and spraying after the fabric is prepared.

[0005] Currently, fabrics are immersed in antibacterial solutions, but this method cannot guarantee that the fabric will have a stable antibacterial function for a long time. After the fabric is made into clothing, repeated washing and soaking in water in a washing machine can easily wash away the antibacterial components, resulting in a decrease or even disappearance of the antibacterial effect. At the same time, the fabric treated with antibacterial agents has a lower breathability because a protective film is formed on the surface of the fabric, which cannot meet the breathability requirements of suit fabrics.

[0006] With the development of the times, people have increasingly higher requirements for fabrics. Developing fabrics that meet consumer needs plays an increasingly important role in suit fabric production. Waterproof, breathable, and antibacterial suit fabrics block the harmful effects of harsh weather while allowing sweat and moisture produced by the body during exercise to escape. They also offer good antibacterial and antimicrobial effects, providing excellent comfort. Therefore, suit fabrics with durable antibacterial and waterproof / breathable properties are gradually gaining widespread attention. Summary of the Invention

[0007] The purpose of this invention is to address the shortcomings of existing technologies by proposing a nano-antibacterial layered fabric, its preparation method, and a nano-antibacterial suit.

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

[0009] Preferably, the nano antibacterial fabric is prepared by the following steps: adding dopamine and terminal amino polyamide amine to a Tris-HCl solution with pH=8-9, adding activated fabric to the solution, ultrasonically treating at 40-50℃ for 1-2 hours, removing, washing, and vacuum drying.

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

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

[0012] Preferably, the activated fabric is prepared by the following steps: tourmaline powder, stearic acid, and polypropylene terephthalate are blended and extruded, granulated, melt-spun, web-laid, hot-rolled and reinforced, and activated with ammonia plasma for 10-20 minutes.

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

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

[0015] Preferably, during the molten spinning process, the diameter of the spinneret orifice is 0.2 mm and the length-to-diameter 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 prepared by the following steps: mixing and ball milling graphene oxide and tourmaline powder evenly, adding cerium nitrate and water, ultrasonically treating for 10-20 minutes, adjusting the pH of the system to 8-9, continuing ultrasonic treatment for 1-2 hours, filtering, washing, vacuum drying, and pulverizing.

[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 above-mentioned method for preparing nano-antibacterial layered fabric involves laying the nano-antibacterial fabric flat, attaching a polytetrafluoroethylene (PTFE) garment film to one side of it, and then attaching a knitted or woven fabric to the surface of the PTFE garment film.

[0020] A nano-antibacterial suit, such as Figure 1As shown, its fabric includes: the above-mentioned nano-antibacterial layered fabric and inner lining fabric stitched 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] This invention provides a nano-antibacterial layered fabric with a multi-layer structure, including a bottom layer, a middle layer, and a top layer. The bottom layer is made of nano-antibacterial fabric with added nano-antibacterial particles to effectively inhibit bacterial growth and odor production. The middle layer uses a PTEF film to improve the fabric's waterproofness and breathability. The top layer uses high-quality knitted or woven fabric to ensure wearing comfort and aesthetic appearance.

[0023] This invention utilizes a compound grinding process involving graphene oxide and tourmaline powder, resulting in excellent dispersion uniformity. By depositing nano-rare earth elements on the surfaces of both materials, and then blending and spinning them with polypropylene terephthalate (PPD), the resulting spun fibers not only possess excellent antibacterial properties but also exhibit extremely long-lasting antibacterial effects and deodorization, demonstrating high removal rates for ammonia, acetic acid, and isovaleric acid. Experiments have shown that the use of rare earth elements in this invention significantly enhances the antibacterial properties of the spun fibers, while also providing remarkable deodorization and high fabric comfort.

[0024] This invention further employs a combination of dopamine and terminal amino-terminated polyamide amines incorporated into the activated fabric network, which then binds to the amino groups on the activated fabric surface, effectively enhancing the mechanical strength of the resulting fabric. This invention utilizes nano-antibacterial particles, nano-antibacterial fabric, and a multi-layered fabric structure, resulting in a nano-antibacterial layered fabric with excellent antibacterial properties, as well as superior comfort and durability.

[0025] This invention also provides a nano-antibacterial suit with excellent antibacterial properties, comfort, and durability. It utilizes the aforementioned nano-antibacterial layered fabric and inner lining sewn together, effectively inhibiting bacterial growth and preventing odors after prolonged wear, thus improving comfort and health. Furthermore, the addition of nano-antibacterial particles does not affect the fabric's comfort and durability, resulting in a better wearing experience and longer lifespan for the suit. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of a nano-antibacterial suit fabric; where 1 is the nano-antibacterial layered fabric, 2 is the inner lining fabric, 11 is the outer 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 This is a schematic diagram of the structure of a nano-antibacterial suit.

[0028] Figure 3 A photo of the actual nano-antibacterial suit.

[0029] Figure 4 Comparison charts showing the tensile strength and tear strength of the nano-antibacterial fabrics obtained in Examples 5, 6, 1, and 2.

[0030] Figure 5 The graph shows the changes in the antibacterial rate of the nano-antibacterial fabrics obtained in Examples 5, 6, 1, and 2 against Staphylococcus aureus.

[0031] Figure 6 The graph shows the changes in the antibacterial rate of the nano-antibacterial fabrics against Escherichia coli obtained in Examples 5, 6, 1, and 2.

[0032] Figure 7 The graph shows the changes in the antibacterial rate of the nano-antibacterial fabrics obtained in Examples 5, 6, 1, and 2 against Candida albicans.

[0033] Figure 8 The graph shows a comparison of the removal rates of ammonia, acetic acid, and isovaleric acid by the nano-antibacterial fabrics obtained in Examples 5, 6, 1, and 2.

[0034] Figure 9 The graph shows a comparison of the moisture permeability and water pressure resistance of the nano-antibacterial layered fabrics obtained in Examples 5, 6, 1, and 2. Detailed Implementation

[0035] The present invention will be further explained below with reference to specific embodiments.

[0036] Example 1

[0037] A nano-antibacterial layered fabric includes: a polytetrafluoroethylene (PTFE) garment film and a bottom layer adhered to one side of the PTFE garment film, and a wool woven fabric adhered to the other side of the PTFE garment film; wherein the bottom layer is made of nano-antibacterial fabric.

[0038] The nano antibacterial fabric is prepared by the following steps: 10g of dopamine and 1g of terminal amino polyamide amine are added to 500g of Tris-HCl solution with a pH of 8-9, 350g of activated fabric is added, and the fabric is ultrasonically treated at 40℃ for 1h at an ultrasonic frequency of 5kHz. The fabric is then removed, washed with deionized water, and vacuum dried.

[0039] The activated fabric is prepared using the following steps: 10g of tourmaline powder, 1g of stearic acid, and 500g of polypropylene terephthalate are mixed and extruded through a twin-screw extruder at an extrusion temperature of 220℃. The mixture is then granulated, melt-spun into filaments with a spinneret orifice diameter of 0.2mm and an aspect ratio of 2.5. The filaments are then laid into a web, hot-rolled for reinforcement, and plasma-activated using ammonia as the activation gas for 10 minutes at a power of 220W and a pressure of 100Pa.

[0040] The above-mentioned method for preparing nano-antibacterial layered fabric involves laying the nano-antibacterial fabric flat, attaching a polytetrafluoroethylene (PTFE) garment film to one side of it, and then attaching a wool woven fabric to the surface of the PTFE garment film.

[0041] Example 2

[0042] A nano-antibacterial layered fabric includes: a polytetrafluoroethylene (PTFE) garment film and a bottom layer adhered to one side of the PTFE garment film, and a wool woven fabric adhered to the other side of the PTFE garment film; wherein the bottom layer is made of nano-antibacterial fabric.

[0043] The nano antibacterial fabric is prepared by the following steps: 20g of dopamine and 10g of terminal amino polyamide amine are added to 1000g of Tris-HCl solution with a pH of 8-9, 700g of activated fabric is added, and the fabric is ultrasonically treated at 50℃ for 2h at an ultrasonic frequency of 12kHz. The fabric is then removed, washed with deionized water, and vacuum dried.

[0044] The activated fabric is prepared using the following steps: 30g of tourmaline powder, 10g of stearic acid, and 1000g of polypropylene terephthalate are mixed and extruded through a twin-screw extruder at an extrusion temperature of 250℃. The mixture is then granulated, melt-spun into filaments with a spinneret orifice diameter of 0.2mm and an aspect ratio of 2.5. The filaments are then web-laid, hot-rolled for reinforcement, and plasma-activated using ammonia as the activation gas for 20 minutes at a power of 260W and a pressure of 150Pa.

[0045] The above-mentioned method for preparing nano-antibacterial layered fabric involves laying the nano-antibacterial fabric flat, attaching a polytetrafluoroethylene (PTFE) garment film to one side of it, and then attaching a wool woven fabric to the surface of the PTFE garment film.

[0046] Example 3

[0047] A nano-antibacterial layered fabric includes: a polytetrafluoroethylene (PTFE) garment film and a bottom layer adhered to one side of the PTFE garment film, and a wool woven fabric adhered to the other side of the PTFE garment film; wherein the bottom layer is made of nano-antibacterial fabric.

[0048] The nano antibacterial fabric is prepared by the following steps: 12g of dopamine and 7g of terminal amino polyamide amine are added to 700g of Tris-HCl solution with a pH of 8-9, 400g of activated fabric is added, and the fabric is ultrasonically treated at 48℃ for 80min at an ultrasonic frequency of 9kHz. The fabric is then removed, washed with deionized water, and vacuum dried.

[0049] The activated fabric is prepared using the following steps: 15g of pretreated tourmaline powder, 7g of stearic acid, and 700g of polypropylene terephthalate are mixed and extruded using a twin-screw extruder at an extrusion temperature of 240℃. The mixture is then granulated, melt-spun, and the spinneret has a spinneret orifice diameter of 0.2mm and an aspect ratio of 2.5. The fabric is then laid into a web, hot-rolled for reinforcement, and plasma activated for 12 minutes using ammonia as the activation gas at a power of 250W and a pressure of 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, and ultrasonic treatment is carried out at a frequency of 12kHz for 10min. The pH value of the system is adjusted to 8-9 with ammonia water, and ultrasonic treatment is continued for 2h. The mixture is then filtered, washed, vacuum dried, and pulverized.

[0051] The above-mentioned method for preparing nano-antibacterial layered fabric involves laying the nano-antibacterial fabric flat, attaching a polytetrafluoroethylene (PTFE) garment film to one side of it, and then attaching a wool woven fabric to the surface of the PTFE garment film.

[0052] Example 4

[0053] A nano-antibacterial layered fabric includes: a polytetrafluoroethylene (PTFE) garment film and a bottom layer adhered to one side of the PTFE garment film, and a wool woven fabric adhered to the other side of the PTFE garment film; wherein the bottom layer is made of nano-antibacterial fabric.

[0054] The nano antibacterial fabric is prepared by the following steps: 18g of dopamine and 3g of terminal amino polyamide amine are added to 900g of Tris-HCl solution with a pH of 8-9, 600g of activated fabric is added, and the fabric is ultrasonically treated at 42℃ for 100min at an ultrasonic frequency of 6kHz. The fabric is then removed, washed with deionized water, and vacuum dried.

[0055] The activated fabric is prepared using the following steps: 25g of pretreated tourmaline powder, 3g of stearic acid, and 900g of polypropylene terephthalate are mixed and extruded using a twin-screw extruder at an extrusion temperature of 230℃. The mixture is then granulated, melt-spun, and the spinneret has a spinneret orifice diameter of 0.2mm and an aspect ratio of 2.5. The fabric is then web-laid, hot-rolled for reinforcement, and plasma-activated using ammonia as the activation gas for 18 minutes at a power of 230W and a pressure of 130Pa.

[0056] The pretreated tourmaline powder is prepared by the following steps: 1g of graphene oxide and 30g of tourmaline powder are mixed and ball-milled evenly, 0.1g of cerium nitrate and 400g of water are added, and ultrasonic treatment is carried out at a frequency of 5-12kHz for 10min. The pH value of the system is adjusted to 8-9 with ammonia water, and ultrasonic treatment is continued for 2h. The mixture is then filtered, washed, vacuum dried, and pulverized.

[0057] The above-mentioned method for preparing nano-antibacterial layered fabric involves laying the nano-antibacterial fabric flat, attaching a polytetrafluoroethylene (PTFE) garment film to one side of it, and then attaching a wool woven fabric to the surface of the PTFE garment film.

[0058] Example 5

[0059] A nano-antibacterial layered fabric includes: a polytetrafluoroethylene (PTFE) garment film and a bottom layer adhered to one side of the PTFE garment film, and a wool woven fabric adhered to the other side of the PTFE garment film; wherein the bottom layer is made of nano-antibacterial fabric.

[0060] The nano antibacterial fabric is prepared by the following steps: 15g of dopamine and 5g of terminal amino polyamide amine are added to 800g of Tris-HCl solution with a pH of 8-9, 500g of activated fabric is added, and the fabric is ultrasonically treated at 45℃ for 90min at an ultrasonic frequency of 7.5kHz. The fabric is then removed, washed with deionized water, and vacuum dried.

[0061] The activated fabric is prepared using the following steps: 20g of pretreated tourmaline powder, 5g of stearic acid, and 800g of polypropylene terephthalate are mixed and extruded using a twin-screw extruder at an extrusion temperature of 235℃. The mixture is then granulated, melt-spun, and the spinneret has a spinneret orifice diameter of 0.2mm and an aspect ratio of 2.5. The fabric is then laid into a web, hot-rolled for reinforcement, and plasma activated for 15 minutes using ammonia as the activation gas at a power of 240W and a pressure of 120Pa.

[0062] The pretreated 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, and the mixture is ultrasonically treated at a frequency of 9kHz for 15min. The pH of the system is adjusted to 8-9 with ammonia water, and ultrasonic treatment is continued for 1.5h. The mixture is then filtered, washed, vacuum dried, and pulverized.

[0063] The above-mentioned method for preparing nano-antibacterial layered fabric involves laying the nano-antibacterial fabric flat, attaching a polytetrafluoroethylene (PTFE) garment film to one side of it, and then attaching a wool woven fabric to the surface of the PTFE garment film.

[0064] Example 6

[0065] A nano-antibacterial layered fabric includes: a polytetrafluoroethylene (PTFE) garment film and a bottom layer adhered to one side of the PTFE garment film, and a wool woven fabric adhered to the other side of the PTFE garment film; wherein the bottom layer is made of nano-antibacterial fabric.

[0066] The nano antibacterial fabric is prepared by the following steps: 15g of dopamine and 5g of terminal amino polyamide amine are added to 800g of Tris-HCl solution with a pH of 8-9, 500g of activated fabric is added, and the fabric is ultrasonically treated at 45℃ for 90min at an ultrasonic frequency of 7.5kHz. The fabric is then removed, washed with deionized water, and vacuum dried.

[0067] The activated fabric is prepared using the following steps: 20g of tourmaline powder, 5g of stearic acid, and 800g of polypropylene terephthalate are mixed and extruded using a twin-screw extruder at an extrusion temperature of 235℃. The mixture is then granulated, melt-spun, and the spinneret has a spinneret orifice diameter of 0.2mm and an aspect ratio of 2.5. The fabric is then web-laid, hot-rolled for reinforcement, and plasma activated for 15 minutes using ammonia as the activation gas at a power of 240W and a pressure of 120Pa.

[0068] The above-mentioned method for preparing nano-antibacterial layered fabric involves laying the nano-antibacterial fabric flat, attaching a polytetrafluoroethylene (PTFE) garment film to one side of it, and then attaching a wool woven fabric to the surface of the PTFE garment film.

[0069] Comparative Example 1

[0070] A nano-antibacterial layered fabric includes: a polytetrafluoroethylene (PTFE) garment film and a bottom layer adhered to one side of the PTFE garment film, and a wool woven fabric adhered to the other side of the PTFE garment film; wherein the bottom layer is made of nano-antibacterial fabric.

[0071] The nano antibacterial fabric is prepared by the following steps: 15g of dopamine and 5g of terminal amino polyamide amine are added to 800g of Tris-HCl solution with a pH of 8-9, 500g of activated fabric is added, and the fabric is ultrasonically treated at 45℃ for 90min at an ultrasonic frequency of 7.5kHz. The fabric is then removed, washed with deionized water, and vacuum dried.

[0072] The activated fabric is prepared by the following steps: 20g of pretreated tourmaline powder, 5g of stearic acid, and 800g of polypropylene terephthalate are mixed and extruded through a twin-screw extruder at an extrusion temperature of 235℃, granulated, melt-spun into filaments, wherein the diameter of the spinneret orifice is 0.2mm and the aspect ratio is 2.5; web is laid and hot-rolled for reinforcement.

[0073] The pretreated 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, and the mixture is ultrasonically treated at a frequency of 9kHz for 15min. The pH of the system is adjusted to 8-9 with ammonia water, and ultrasonic treatment is continued for 1.5h. The mixture is then filtered, washed, vacuum dried, and pulverized.

[0074] The above-mentioned method for preparing nano-antibacterial layered fabric involves laying the nano-antibacterial fabric flat, attaching a polytetrafluoroethylene (PTFE) garment film to one side of it, and then attaching a wool woven fabric to the surface of the PTFE garment film.

[0075] Comparative Example 2

[0076] A nano-antibacterial layered fabric includes: a polytetrafluoroethylene (PTFE) garment film and a bottom layer adhered to one side of the PTFE garment film, and a wool woven fabric adhered to the other side of the PTFE garment film; wherein the bottom layer is made of nano-antibacterial fabric.

[0077] The nano antibacterial fabric is prepared by the following steps: 15g of dopamine is added to 800g of Tris-HCl solution with a pH of 8-9, 500g of activated fabric is added, and the fabric is ultrasonically treated at 45℃ for 90min at an ultrasonic frequency of 7.5kHz. The fabric is then removed, washed with deionized water, and vacuum dried.

[0078] The activated fabric is prepared using the following steps: 20g of pretreated tourmaline powder, 5g of stearic acid, and 800g of polypropylene terephthalate are mixed and extruded using a twin-screw extruder at an extrusion temperature of 235℃. The mixture is then granulated, melt-spun, and the spinneret has a spinneret orifice diameter of 0.2mm and an aspect ratio of 2.5. The fabric is then laid into a web, hot-rolled for reinforcement, and plasma activated for 15 minutes using ammonia as the activation gas at a power of 240W and a pressure of 120Pa.

[0079] The pretreated 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, and the mixture is ultrasonically treated at a frequency of 9kHz for 15min. The pH of the system is adjusted to 8-9 with ammonia water, and ultrasonic treatment is continued for 1.5h. The mixture is then filtered, washed, vacuum dried, and pulverized.

[0080] The above-mentioned method for preparing nano-antibacterial layered fabric involves laying the nano-antibacterial fabric flat, attaching a polytetrafluoroethylene (PTFE) garment film to one side of it, and then attaching a wool woven fabric to the surface of the PTFE garment film.

[0081] The tensile strength of the nano antibacterial fabrics obtained in Examples 5, 6, Comparative Example 1, and Comparative Example 2 was determined in accordance with GB / T 24218.3-2010 "Textiles - Test Methods - Part 3: Determination of breaking strength and elongation at break (strip method)".

[0082] The tear strength of the nano antibacterial fabrics obtained in Examples 5, 6, Comparative Example 1, and Comparative Example 2 was determined in accordance with GB / T 3917.3-2009 "Textiles - Tear Properties of Fabrics - Part 3: Determination of Tear Strength of Trapezoidal Specimens".

[0083] like Figure 4 As shown, the tensile strength and tear strength of the nano-antibacterial fabric obtained in Example 5 are higher than those in Example 6, but the difference is not significant (P>0.05); while the tensile strength and tear strength of the nano-antibacterial fabrics obtained in Examples 5 and 6 are much better than those in Comparative Examples 1-2 (P<0.01), which confirms that the nano-antibacterial fabric obtained in this invention has excellent mechanical strength.

[0084] The applicant believes that this is because the present invention uses ammonia gas for plasma activation, thereby making the surface of the activated fabric contain a large number of amino groups. Furthermore, dopamine and terminal amino polyamide amine are compounded and introduced 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 Examples 5, 6, Comparative Example 1, and Comparative Example 2 were quantitatively tested according to GB / T 20944.3-2008 "Evaluation of antibacterial properties of textiles - Part 3: Vibration method". The washing method of the color fastness-to-wash test machine in section 10.1.1 of the standard was used to wash each group of samples, and the antibacterial properties were tested again after the corresponding number of washes. Staphylococcus aureus (ATCC 6538), Escherichia coli (ATCC 11229), and Candida albicans (ATCC 10231) were used as test bacteria.

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

[0087] The deodorizing properties of the nano antibacterial fabrics obtained in Examples 5, 6, Comparative Example 1, and Comparative Example 2 were determined in accordance with GB / T 33610.3-2019 "Determination of deodorizing properties of textiles - Part 3: Gas chromatography". Ammonia, acetic acid, and isovaleric acid were used as test gases.

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

[0089] The applicant believes that this invention achieves its effect because it uses a compound grinding process of graphene oxide and tourmaline powder, resulting in excellent dispersion uniformity. By depositing nano-rare earth elements on the surfaces of both materials, and then blending and spinning them with polypropylene terephthalate, the resulting spun fibers not only possess excellent antibacterial properties but also have an extremely long-lasting antibacterial effect and deodorizing properties, exhibiting high removal rates for ammonia, acetic acid, and isovaleric acid. Furthermore, this invention utilizes ammonia for plasma activation, thereby imbuing the activated fabric surface with a large amount of amino groups, further enhancing the antibacterial properties of the resulting fabric and increasing the binding strength of dopamine, terminal amino-terminated polyamide amines, and the activated fabric, thus prolonging the antibacterial duration.

[0090] The moisture permeability of the nano-antibacterial layered fabrics obtained in Examples 5, 6, Comparative Example 1, and Comparative Example 2 was determined with reference to GB / T 12704.1-2009 "Textiles - Test Methods for Moisture Permeability of Fabrics - Part 1: Moisture Absorption Method"; the water pressure resistance of the nano-antibacterial layered fabrics obtained in Examples 5, 6, Comparative Example 1, and Comparative Example 2 was determined with reference to JIS L1092 B "Test Methods for Water Resistance of Fabrics".

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

[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 top layer. The bottom layer uses a nano antibacterial fabric, in which nano antibacterial particles are added to effectively inhibit the growth of bacteria and the generation of odors. The middle layer uses a PTEF film to improve the waterproofness and breathability of the fabric, and the top layer uses a high-quality knitted or woven fabric to ensure the comfort and appearance of the garment.

[0093] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A nano-antibacterial layered fabric, characterized in that, include: The intermediate layer and the bottom layer adhered to one side of the intermediate layer, and the top layer adhered to the other side of the intermediate layer; The bottom layer uses nano antibacterial fabric, the middle layer uses polytetrafluoroethylene clothing film, and the top layer is knitted or woven fabric. The nano antibacterial fabric is prepared by the following steps: dopamine and terminal amino polyamide amine are added to a Tris-HCl solution with pH=8-9, the activated fabric is added, ultrasonic treatment is carried out at 40-50℃ for 1-2 hours, the fabric is removed, washed, and vacuum dried. The activated fabric is prepared by the following steps: tourmaline powder, stearic acid, and polypropylene terephthalate are blended and extruded, granulated, melt-spun into fibers, laid into a web, hot-rolled for reinforcement, and activated with ammonia plasma for 10-20 minutes.

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

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

4. The nano-antibacterial layered fabric according to claim 1, characterized in that, The extrusion temperature is 220-250℃; during the melt spinning process, the diameter of the spinneret orifice is 0.2mm and the length-to-diameter ratio is 2.5; the plasma activation power is 220-260W and the plasma activation pressure is 100-150Pa.

5. The nano-antibacterial layered fabric according to claim 1, characterized in that, Tourmaline powder is pretreated tourmaline powder, which is prepared by the following steps: Graphene oxide and tourmaline powder are mixed and ball-milled evenly, cerium nitrate and water are added and ultrasonically treated for 10-20 minutes, the pH value of the system is adjusted to 8-9, ultrasonic treatment is continued for 1-2 hours, filtered, washed, vacuum dried, and pulverized.

6. The nano-antibacterial layered fabric according to claim 1, 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.

7. A method for preparing a nano-antibacterial layered fabric as described in any one of claims 1-6, characterized in that, Lay the nano antibacterial fabric flat, attach a polytetrafluoroethylene (PTFE) garment film to one side, and then attach a knitted or woven fabric to the surface of the PTFE garment film.

8. A nano-antibacterial suit, characterized in that, include: The nano-antibacterial layered fabric and the inner lining fabric are stitched together, with the bottom layer of the nano-antibacterial layered fabric adhered to the surface of the inner lining fabric.

Images