Medical textile material and preparation method thereof

Abstract

The invention provides a medical textile material and a preparation method thereof, the medical textile material is composed of an isolation layer, a composite salt coating, an ionized layer and an antibacterial layer, and the preparation method comprises the steps of base material preparation, coating, ionized layer manufacturing, antibacterial layer treatment and assembly testing. The fabric is excellent in the aspects of virus protection, disinfection, breathability and comfort, has wide application potential and is suitable for biological protection requirements in a high-risk environment.

Description

Technical Field

[0001] The invention relates to the technical field of medical protective clothing fabrics, and more specifically to a medical textile material that can be used for isolating and disinfecting viruses and a preparation method thereof. Background Art

[0002] With the frequent occurrence of global public health events and the increasing demand for biosafety protection in the fields of industry, medicine, etc., the development of efficient, comfortable and multifunctional medical textile materials has become a hot topic in current research. Traditional protective clothing fabrics often have problems such as poor air permeability, low comfort, and limited protective effect, which makes it difficult to meet the needs of complex and changing application scenarios.

[0003] In order to overcome these shortcomings, researchers began to explore the application of various advanced technologies in the research and development of protective clothing fabrics. Among them, the selection and structural design of the isolation layer material are crucial to improving the protective performance of the fabric. High-density and high-breathability non-woven fabrics and microporous membrane materials have attracted much attention due to their unique physical properties. They can effectively block microorganisms and chemicals while maintaining good breathability and improving the comfort of the wearer.

[0004] In addition, composite salt coating technology is also widely used in the preparation of protective clothing fabrics. By coating a layer of coating made of a specific composite salt solution on the surface of the substrate, the protective effect of the fabric can be significantly enhanced. The composite salt coating can not only adsorb and kill microorganisms it contacts, but also block the penetration of harmful chemicals to a certain extent.

[0005] In order to further improve the protective performance, ionosphere technology has been introduced into the research and development of protective clothing fabrics. The ionosphere is composed of a stainless steel filament grid and is connected to a high-voltage pulse generator. It can produce an ionization effect when needed to actively kill or inhibit microorganisms on the contact surface. This technology not only improves the active protection ability of protective clothing fabrics, but also enhances its ability to respond to public health emergencies.

[0006] Finally, the importance of the antibacterial layer as the last line of defense of protective clothing fabrics is self-evident. By evenly integrating antibacterial components into the fibers through co-spinning technology, protective clothing fabrics with long-term antibacterial properties can be prepared. This kind of fabric can continuously release antibacterial substances, effectively inhibiting the growth and reproduction of microorganisms such as bacteria and viruses, thereby protecting the health and safety of the wearer.

[0007] In summary, medical textile materials that combine multiple technologies such as isolation layer, composite salt coating, ionization layer and antibacterial layer have become the mainstream direction of current research and development. By continuously optimizing material selection and preparation process, protective clothing fabrics with excellent performance, high comfort and multifunctionality can be prepared to meet the needs of various complex application scenarios. Summary of the invention

[0008] The present invention provides a medical textile material and a preparation method thereof. The medical textile material adopts a multi-layer structure design and combines advanced nanotechnology and biomaterials to provide effective isolation and disinfection functions for viruses and ensure the safety of the wearer.

[0009] In a first aspect, the present invention provides a composition of a medical textile material, which is composed of an isolation layer, a composite salt coating, an ionosphere and an antibacterial layer.

[0010] Furthermore, the isolation layer is selected from one of high-density, high-air-permeability non-woven fabrics and microporous membrane materials.

[0011] Furthermore, the non-woven fabric is made of polyester (PET) or polypropylene (PP) fiber.

[0012] Furthermore, the microporous membrane is made of polytetrafluoroethylene (PTFE) or polyvinylidene fluoride (PVDF).

[0013] Furthermore, the pore size of the isolation layer is 0.1-1 μm, preferably 0.1-0.8 μm, and more preferably 0.1-0.3 μm, which can more effectively block the penetration of microorganisms such as viruses and bacteria while maintaining good air permeability.

[0014] Furthermore, the composite salt coating is prepared by dipping or spraying a composite salt solution onto a substrate.

[0015] Furthermore, the composite salt solution is prepared by mixing high-purity salts and environmentally friendly solvents in a certain proportion.

[0016] Furthermore, the concentration of the high-purity salt solution is controlled between 10% and 20%, preferably between 12% and 18%, preferably 15%, so as to ensure the coating effect while reducing the amount of solvent used and the cost.

[0017] Furthermore, the environmentally friendly solvent is composed of ethanol and water, wherein ethanol accounts for 30%-50%, preferably 35%-45%, and more preferably 40%, which can both ensure the volatility of the solvent and reduce the emission of harmful substances.

[0018] Furthermore, the ionosphere is made of a metal mesh and is connected to a high-voltage pulse generator.

[0019] Furthermore, the metal mesh is made of stainless steel filaments with a diameter of 0.15 mm, woven into a 1x1 mm grid, and the metal mesh is nickel-plated or copper-plated, which can ensure sufficient conductivity and reduce the impact on the air permeability of the fabric.

[0020] Furthermore, the connection uses a silicone wire with an insulation layer thickness of 0.5 mm and an IP67-rated waterproof connector to ensure the safety and stability of the circuit connection.

[0021] Furthermore, the high voltage pulse generator has a built-in intelligent control chip and a safety protection mechanism.

[0022] Furthermore, the fabric also has an antibacterial layer.

[0023] Furthermore, the antibacterial layer is made of bamboo charcoal fiber, chitosan fiber, or silver ion treated fiber in a ratio of 1-20% with ordinary polyester fiber using a blending spinning technology, which can ensure the antibacterial effect and maintain the overall performance of the fabric.

[0024] Furthermore, the antibacterial layer may also be added with a silver ion antibacterial agent, and the nano silver particles may be evenly attached to the surface of the fabric or embedded in the fiber through a water-soluble silane coupling agent to ensure the durability and effectiveness of the antibacterial agent.

[0025] In a second aspect, the present invention also provides a method for preparing the medical textile material, which comprises:

[0026] Step 1: Preparation of isolation layer;

[0027] Step 2: Preparation of composite salt coating;

[0028] Step 3: Ionosphere preparation;

[0029] Step 4: Preparation of antibacterial layer;

[0030] Step 5: Overall assembly and testing.

[0031] Step 1: Preparation of the isolation layer includes selecting a substrate, and performing cleaning and drying processes.

[0032] Furthermore, the cleaning step is to place the selected substrate into an ultrasonic cleaning machine, add an appropriate amount of deionized water, set the cleaning temperature to 40° C., and the cleaning time to 30 minutes.

[0033] Furthermore, the drying step is to take out the cleaned substrate, gently wipe off excess surface moisture with a clean cloth or paper towel, and then put it into a 60° C. constant temperature oven for drying for 12 hours until the substrate is completely dry and no moisture remains.

[0034] The composite salt coating preparation step in step 2 includes preparing a composite salt solution, and uniformly covering the composite salt solution on the substrate prepared in step 1 by dipping.

[0035] Furthermore, the composite salt solution is a mixed solution of an inorganic salt and ethanol-water.

[0036] Further, the ratio of the inorganic salt to ethanol-water in the mixed solution is 1:1-2. In some embodiments, the ratio of the inorganic salt to ethanol-water in the mixed solution is 1:1.

[0037] In some embodiments, the inorganic salt solution is selected from at least one of NaCl and KCl. In some embodiments, the inorganic salt is selected from NaCl. In some embodiments, the inorganic salt is selected from KCl. In some embodiments, the inorganic salt is selected from NaCl and KCl.

[0038] In some embodiments, the inorganic salt concentration is 10-20%. In some embodiments, the inorganic salt concentration is 15%. In some embodiments, the inorganic salt concentration is 17%.

[0039] In some embodiments, the ethanol-water mixed solution has a ratio of ethanol to water of 1-2: 1. In some embodiments, the ethanol-water ratio is 1.5:1.

[0040] In some embodiments, the composite salt is selected from a mixed solution of NaCl and ethanol-water. In some embodiments, the composite salt is selected from a mixed solution of KCl and ethanol-water. In some embodiments, the composite salt is selected from a mixed solution of NaCl and KCl and ethanol-water.

[0041] In some embodiments, the composite salt solution is a 15% NaCl solution and a 60% water + 40% ethanol mixed solution. In some embodiments, the composite salt solution is a 15% KCl solution and a 60% water + 40% ethanol solution. In some embodiments, the composite salt solution is a 17% KCl and NaCl mixed solution and a 60% water + 40% ethanol solution.

[0042] Furthermore, the dip coating is to slowly immerse the pretreated substrate into the composite salt solution, and place the coated substrate in a 65° C. constant temperature oven for drying for 6-10 hours.

[0043] The ionosphere preparation described in step 3 includes cutting of metal mesh material, circuit connection and fixing of the metal mesh.

[0044] Furthermore, the metal mesh is cut using a high-precision laser cutting machine, and the edge smoothness is checked using a microscope.

[0045] Furthermore, the circuit connection uses a silicone wire with an insulation layer thickness of 0.5 mm to connect the metal mesh and the high-voltage pulse generator, and a multimeter is used to detect circuit connectivity.

[0046] Furthermore, the metal mesh was fixed on the coating using a hot melt glue gun, and the firmness of the fixing points was checked using a pressure tester.

[0047] Furthermore, the preparation of the antibacterial layer in step 4 includes preparing an antibacterial fabric layer, spraying an antibacterial agent and curing treatment.

[0048] Furthermore, the antibacterial fabric layer is made of blended yarn.

[0049] Furthermore, the antibacterial fabric layer is heat-pressed and laminated using a heat press, with a heat press temperature of 120-150°C, a heat press pressure of 2-5MPa, and a heat press time of 10-30s. In some embodiments, the heat press temperature is 130-140°C, the heat press pressure is 3-4MPa, and the heat press time is 15-25s. In some embodiments, the heat press temperature is 135°C, the heat press pressure is 3.5MPa, and the heat press time is 20s.

[0050] Furthermore, the spraying of the antibacterial agent requires the use of a spray gun to control the spraying speed and spraying amount. In some embodiments, the spraying speed is 0.2-0.5 L / min, and the spraying amount is 3-5 g / m 2 In some embodiments, the spraying speed is 0.35 L / min and the spraying amount is 4 g / m 2 In some embodiments, the spraying speed is 0.3-0.4 L / min, and the spraying amount is 3.5-4.5 g / m 2 .

[0051] Furthermore, the curing treatment is curing in a constant temperature oven at 70-80° C. for 3-5 hours. In some embodiments, the curing treatment is curing in a constant temperature oven at 75° C. for 4 hours.

[0052] Furthermore, the overall assembly and testing described in step 4 includes assembling the isolation layer, composite salt coating, ionosphere and antibacterial layer in sequence into a complete protective clothing fabric and conducting performance tests, including virus isolation efficiency, virus disinfection ability, breathability, comfort, etc.

[0053] The medical textile material prepared by the present invention has excellent virus isolation and disinfection capabilities, is suitable for high-risk environments in the fields of medical treatment, disease control, scientific research, etc., and has the following excellent effects:

[0054] (1) Highly efficient isolation and killing of pathogenic microorganisms: The combination of the isolation layer and the composite salt coating forms a solid physical and chemical double barrier, effectively blocking and killing viruses and bacteria attached to the fabric. The addition of the ionosphere achieves instantaneous killing of microorganisms on the contact surface through high-voltage pulse discharge technology, further improving the protective effect;

[0055] (2) Long-lasting antibacterial: The introduction of the antibacterial layer uses highly effective antibacterial agents such as nano-silver composite particles to continuously release antibacterial ingredients, effectively inhibiting the growth and reproduction of microorganisms such as bacteria and fungi, thereby extending the service life and protective effect of the protective clothing;

[0056] (3) High breathability and comfort: The isolation layer uses high-density, high-breathability materials, which not only ensures protective performance, but also ensures the wearer's comfortable experience, reducing the stuffiness that may be caused by long-term wearing;

[0057] (4) Safety and environmental protection: All materials in the fabric are strictly screened to ensure that they are non-toxic and harmless and meet environmental protection requirements. After achieving its protective purpose, the composite salt coating can be naturally degraded, reducing environmental pollution.

[0058] With the continuous advancement of technology and innovation of materials, this fabric is expected to be applied and promoted in more fields in the future. DETAILED DESCRIPTION

[0059] In order to enable those skilled in the art to more clearly understand the technical solution of the present invention, the technical solution of the present invention will be described in detail below in conjunction with specific embodiments.

[0060] Other materials used in the present invention, if not otherwise stated, can be obtained through commercial channels. Other terms used in the present invention, unless otherwise specified, generally have the meanings commonly understood by those of ordinary skill in the art. The present invention is further described in detail below in conjunction with specific examples and with reference to data. The following examples are only for illustrating the present invention, and are not intended to limit the scope of the present invention in any way.

[0061] Example 1: Basic medical textile material

[0062] Isolation layer: A PTFE (polytetrafluoroethylene) microporous membrane with a pore size of 0.2 μm was selected as the substrate, an appropriate amount of deionized water was added, ultrasonic cleaning was performed at 40° C. for 30 minutes, and drying was performed in a constant temperature oven at 60° C. for 12 hours.

[0063] Preparation of composite salt coating: Prepare a mixture of 15% NaCl solution and 60% water + 40% ethanol, and form a thin and uniform coating on the surface of the substrate by spraying technology. Place the coated substrate in a 65°C constant temperature oven to dry for 8 hours.

[0064] Ionosphere preparation: Use stainless steel filaments with a diameter of 0.15 mm, weave them into a 1x1 mm grid and nickel-plated them. Use a laser cutting machine to cut the metal mesh. Use a silicone wire with an insulation layer thickness of 0.5 mm and an IP67-rated waterproof connector to connect the metal mesh to the high-voltage pulse generator and fix it on the coating.

[0065] Preparation of antibacterial layer: bamboo charcoal fiber and ordinary polyester fiber are blended and spun in a ratio of 1:9, the antibacterial fabric layer is hot pressed and composited, and the antibacterial agent is sprayed and cured. The hot pressing temperature is 135℃, the hot pressing pressure is 3.5MPa, and the hot pressing time is 20s. The antibacterial agent is nano silver particles, the spraying speed is 0.35L / min, and the spraying amount is 4g / m 2 , attached to the fiber surface through a water-soluble silane coupling agent. After spraying the nanosilver antibacterial agent, it was cured in a constant temperature oven at 75℃ for 4h.

[0066] Overall assembly and testing: Assemble each layer in the order of isolation layer - composite salt coating - ionosphere - antibacterial layer, and conduct performance tests such as virus isolation efficiency, air permeability, and comfort.

[0067] Example 2: Reinforced medical textile material

[0068] Isolation layer: A polypropylene (PP) non-woven fabric with a pore size of 0.1 μm was selected as the substrate, ultrasonically cleaned at 40° C. for 30 minutes, and dried in a constant temperature oven at 60° C. for 12 hours.

[0069] Preparation of composite salt coating: Prepare a mixture of 15% KCl solution and 50% water + 50% ethanol, and form a thin and uniform coating on the surface of the substrate by spraying technology. Place the coated substrate in a 65°C constant temperature oven to dry for 8 hours.

[0070] Ionosphere preparation: Use stainless steel filaments with a diameter of 0.15 mm, weave them into a 0.8x0.8 mm grid and nickel-plated them. Use a laser cutting machine to cut the metal mesh. Use a silicone wire with an insulation layer thickness of 0.5 mm and an IP67-rated waterproof connector to connect the metal mesh to the high-voltage pulse generator and fix it on the coating.

[0071] Preparation of antibacterial layer: chitosan fiber and silver ion treated polyester fiber were blended and spun in a ratio of 2:8, the antibacterial fabric layer was hot pressed and composited, and the antibacterial agent was sprayed and cured. The hot pressing temperature was 135°C, the hot pressing pressure was 3.5MPa, the hot pressing time was 10-30s, the antibacterial agent was nano silver particles, the spraying speed was 0.35L / min, and the spraying amount was 4g / m 2 After spraying the nanosilver antibacterial agent, it was cured in a constant temperature oven at 75°C for 4 hours.

[0072] Overall assembly and testing: Assemble each layer in the order of isolation layer - composite salt coating - ionosphere - antibacterial layer, and conduct performance tests such as virus isolation efficiency, air permeability, and comfort.

[0073] Example 3: Highly protective medical textile material

[0074] Isolation layer: PLA (polylactic acid) non-woven fabric with a pore size of 0.3 μm was selected as the substrate, ultrasonically cleaned at 40°C for 30 minutes, and dried in a constant temperature oven at 60°C for 12 hours.

[0075] Preparation of composite salt coating: Prepare a mixture of 15% NaCl solution and 60% water + 40% ethanol, and form a thin and uniform coating on the surface of the substrate by spraying technology. Place the coated substrate in a 65°C constant temperature oven to dry for 8 hours.

[0076] Ionosphere preparation: Use stainless steel filaments with a diameter of 0.15 mm, weave them into a 0.8x0.8 mm grid and nickel-plated them. Use a laser cutting machine to cut the metal mesh. Use a silicone wire with an insulation layer thickness of 0.5 mm and an IP67-rated waterproof connector to connect the metal mesh to the high-voltage pulse generator and fix it on the coating.

[0077] Preparation of antibacterial layer: Pure natural bamboo fiber and silver ion antibacterial agent are blended and spun to form an antibacterial fabric layer, which is then hot-pressed and composited, sprayed with antibacterial agent and cured. The hot-pressing temperature is 135°C, the hot-pressing pressure is 3.5MPa, the hot-pressing time is 10-30s, the antibacterial agent is nano-silver particles, the spraying speed is 0.35L / min, and the spraying amount is 4g / m 2 After spraying the nanosilver antibacterial agent, it was cured in a constant temperature oven at 75°C for 4 hours.

[0078] Overall assembly and testing: Assemble each layer in the order of isolation layer - composite salt coating - ionosphere - antibacterial layer, and conduct performance tests such as virus isolation efficiency, air permeability, and comfort.

[0079] Example 4: Multifunctional medical textile material

[0080] Isolation layer: A PVDF microporous membrane with a pore size of 0.15 μm was selected as the substrate and was strictly cleaned and dried.

[0081] Preparation of composite salt coating: Weigh 12.75g of sodium chloride and potassium chloride respectively, prepare a 17% mixed salt solution, the solvent is a 45% ethanol + 55% water mixture, and combine dip coating and spray coating to ensure that the coating is uniform and dense. The coated substrate is placed in a 65°C constant temperature oven to dry for 8 hours.

[0082] Ionosphere preparation: Use titanium alloy filaments with a diameter of 0.12mm, weave them into a 0.5x0.5mm grid, and perform gold plating to improve conductivity and antibacterial properties. Use a high-precision laser cutting machine to cut the titanium alloy metal mesh and perform gold plating. Use a laser cutting machine to cut the metal mesh, use a silicone wire with an insulation layer thickness of 0.5mm and an IP67 waterproof connector to connect the metal mesh to the high-voltage pulse generator and fix it on the coating

[0083] Preparation of antibacterial layer: Nanoparticles blended with silver ions and copper ions are used as antibacterial agents. They are evenly embedded into polyester fibers through blending spinning technology, and microcapsules containing bamboo charcoal powder are sprayed on the surface. The antibacterial fabric layer is hot-pressed and composited, sprayed with antibacterial agents and cured. The hot-pressing temperature is 135°C, the hot-pressing pressure is 3.5MPa, the hot-pressing time is 10-30s, the antibacterial agent is nanosilver particles, the spraying speed is 0.35L / min, and the spraying amount is 4g / m 2 After spraying the nanosilver antibacterial agent, it was cured in a constant temperature oven at 75°C for 4 hours.

[0084] Overall assembly and testing: Assemble the layers into a complete protective clothing fabric in the order of isolation layer-composite salt coating-ionosphere-antibacterial layer, and conduct performance tests such as virus isolation efficiency, breathability, and comfort.

[0085] Example 5: Highly breathable medical textile material

[0086] Isolation layer: High-density polyethylene non-woven fabric with a pore size of 0.5-1μm that has been specially processed is selected as the base material.

[0087] Preparation of composite salt coating: Using 10% sodium chloride solution and water as solvent, a thin and uniform coating is formed on the surface of the substrate by spraying technology. The coated substrate is placed in a constant temperature oven at 65°C and dried for 8 hours.

[0088] Preparation of antibacterial layer: Natural plant bamboo fiber and silver ion treated polyester fiber are blended and spun in proportion to form an antibacterial fabric layer. The antibacterial fabric layer is hot pressed and composited, sprayed with antibacterial agent and cured. The hot pressing temperature is 135℃, the hot pressing pressure is 3.5MPa, the hot pressing time is 10-30s, the antibacterial agent is nano silver particles, the spraying speed is 0.35L / min, and the spraying amount is 4g / m 2 After spraying the nanosilver antibacterial agent, it was cured in a constant temperature oven at 75°C for 4 hours.

[0089] Overall assembly and testing: Assemble the layers into a complete protective clothing fabric in the order of isolation layer-composite salt coating-antibacterial layer, and conduct performance tests such as virus isolation efficiency, breathability, and comfort.

[0090] Example 6: Lightweight medical textile material

[0091] Isolation layer: An ultra-lightweight nylon microporous membrane with a pore size of 0.1-0.5 μm is selected as the substrate.

[0092] Preparation of composite salt coating: Prepare a 12% potassium chloride solution and use a dip coating method to form a coating on the surface of the substrate. Place the coated substrate in a 65°C constant temperature oven to dry for 8 hours.

[0093] Ionosphere preparation: Use an ultra-thin stainless steel metal mesh with a thickness of 0.05 mm and a mesh size of 1x1 mm, and perform silver plating. Use a laser cutting machine to cut the metal mesh, and use a silicone wire with an insulation layer thickness of 0.5 mm and an IP67-rated waterproof connector to connect the metal mesh to the high-voltage pulse generator and fix it on the coating.

[0094] Preparation of antibacterial layer: Use nanosilver particle solution to directly attach to the surface of nylon microporous membrane by spraying. Hot press the antibacterial fabric layer, spray the antibacterial agent and solidify. Hot press temperature is 135℃, hot press pressure is 3.5MPa, hot press time is 10-30s, antibacterial agent is nanosilver particles, spraying speed is 0.35L / min, spraying amount is 4g / m 2 After spraying the nanosilver antibacterial agent, it was cured in a constant temperature oven at 75°C for 4 hours.

[0095] Overall assembly and testing: Assemble the layers into a complete protective clothing fabric in the order of isolation layer-composite salt coating-ionosphere-antibacterial layer, and conduct performance tests such as virus isolation efficiency, breathability, and comfort.

[0096] Example 7: Product performance test

[0097] Result test description:

[0098] Air permeability test (Gurley method): Test the air permeability of the fabric under a certain pressure. The smaller the value, the better the air permeability.

[0099] Virus filtration efficiency test: The H1N1 influenza virus (or SARS-CoV-2 virus) is used to test the filtration efficiency of the fabric. The larger the value, the higher the filtration efficiency.

[0100] Chemical protection performance test (EN 14126 level): Tests the fabric's ability to protect against chemical substances. The higher the level, the stronger the protection.

[0101] Comfort test results (subjective evaluation): The comfort of the fabric is evaluated based on the wearer's subjective feelings and is divided into four levels: excellent, good, medium, and poor.

[0102] Table 1 Performance test results of products in Examples 1-6

[0103]

[0104]

[0105] The results show that the biological protection fabrics prepared in the above Examples 1-6 all meet the relevant standards. According to the comparative data in the table, it can be seen that Example 1, Example 4 and Example 6 all show good performance in terms of air permeability, virus filtration efficiency, chemical protection performance and comfort. Among them, Example 4 has the highest virus filtration efficiency, reaching 99.99%; Example 1 has excellent air permeability and comfort; Example 6 has excellent chemical protection performance. Therefore, in practical applications, the appropriate embodiment can be selected for production according to specific needs.

[0106] The above embodiments all demonstrate the diversity and customizability of the medical textile materials provided by the present invention. Different embodiments have different focuses on isolation performance, antibacterial performance, comfort and durability, and can be selected according to specific application scenarios and needs.

Claims

1. A medical textile material, characterized in that: The material consists of an isolation layer, a composite salt coating, an ionosphere and an antibacterial layer.

2. The medical textile material according to claim 1, characterized in that: The isolation layer is one of a non-woven fabric and a microporous membrane material; preferably, the pore size of the isolation layer is 0.1-1 μm, preferably 0.1-0.8 μm, and more preferably 0.1-0.3 μm.

3. The medical textile material according to claim 1 or 2, characterized in that: The composite salt coating is prepared by dipping and / or spraying a composite salt solution on a substrate; the composite salt solution is prepared by mixing high-purity salts and environmentally friendly solvents in a certain proportion; the concentration of the high-purity salt solution is controlled between 10% and 20%, preferably 15%; the environmentally friendly solvent is a mixture of ethanol and water, in which ethanol accounts for 30% to 50%, preferably 40%.

4. The medical textile material according to any one of claims 1 to 3, characterized in that: The ionosphere is made of stainless steel filaments with a diameter of 0.15 mm woven into a 1x1 mm grid, and the metal grid is nickel-plated or copper-plated, and then connected to a high-voltage pulse generator using a silicone wire with an insulation layer thickness of 0.5 mm and an IP67-level waterproof connector.

5. The medical textile material according to any one of claims 1 to 4, characterized in that: The antibacterial layer is made by blending bamboo charcoal fiber, chitosan fiber or synthetic fiber treated with silver ions at a ratio of 1-20% with common polyester fiber by adopting a blending spinning technology.

6. A method for preparing the medical textile material according to any one of claims 1 to 5, comprising: Step 1: Preparation of isolation layer; Step 2: Preparation of composite salt coating; Step 3: Ionosphere preparation; Step 4: Preparation of antibacterial layer; Step 5: Overall assembly and testing.

7. The preparation method according to claim 6, characterized in that: The preparation of the isolation layer in step 1 includes selecting a substrate, and performing cleaning and drying processes.

8. The preparation method according to claim 6, characterized in that: The step 2 of preparing the composite salt coating comprises preparing a composite salt solution of a mixed solution of an inorganic salt and ethanol-water, and uniformly covering the composite salt solution on the substrate prepared in step 1 by dip coating; preferably, the composite salt solution is 15% NaCl solution and 60% water + 40% ethanol solution or 15% KCl solution and 60% water + 40% ethanol solution.

9. The preparation method according to claim 6, characterized in that: The step 3 ionosphere preparation includes cutting of metal mesh material, circuit connection and fixing of the metal mesh; preferably, the metal mesh is cut using a high-precision laser cutting machine, and the edge smoothness is checked using a microscope; preferably, the circuit connection uses a silicone wire with an insulating layer thickness of 0.5 mm to connect the metal mesh and a high-voltage pulse generator, and a multimeter is used to detect circuit connectivity.

10. The preparation method according to claim 7, characterized in that: The preparation of the antibacterial layer in step 4 includes hot pressing and compounding the antibacterial fabric layer, spraying the antibacterial agent and curing; preferably, the antibacterial fabric layer is hot pressed and compounded using a hot press, the hot pressing temperature is 120-150°C, the hot pressing pressure is 2-5MPa, and the hot pressing time is 10-30s; preferably, the spraying speed of the spraying antibacterial agent is 0.2-0.5L / min, and the spraying amount is 3-5g / m 2 ; Preferably, the curing treatment is to cure in a constant temperature oven at 70-80°C for 3-5h.

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