Preparation method of antibacterial and antistatic fabric based on negative ions

Abstract

The invention belongs to the technical field of fabrics, and particularly relates to a preparation method of an antibacterial and antistatic fabric based on negative ions, polyvinyl alcohol and glycerol are dissolved, tourmaline powder is soaked and sintered to obtain polyvinyl alcohol polycondensate wrapped tourmaline powder, then the tourmaline powder is matched with waterborne polyurethane and other materials to form a composite finishing liquid, and the antibacterial and antistatic fabric based on the negative ions is prepared. And finally, carrying out oscillation padding on the polyester fabric, and carrying out pre-drying and baking to obtain the antibacterial and antistatic fabric. The problem that a negative ion material in an existing fabric is poor in stability is solved, a homogeneous electron conduction network is formed on the surface of tourmaline powder by means of solubility, adhesion and wrapping performance of polyvinyl alcohol and conductivity of polycondensation after sintering of polyvinyl alcohol, and therefore the negative ion negative ion fabric is formed. The homogeneous dispersity of the negative ion material in the fabric finishing liquid and the subsequent washing resistance of the negative ion material on the fabric are improved.

Description

Technical Field

[0001] This invention belongs to the field of fabric technology, specifically relating to a method for preparing an antibacterial and antistatic fabric based on negative ions. Background Technology

[0002] With the continuous development of science and technology, functional materials are being integrated into the traditional textile industry to realize the functionalization of textiles, ensuring that textiles develop towards high quality and multifunctionality. Furthermore, functional fabrics and products are currently the mainstream in the textile market and are increasingly popular.

[0003] With the continuous development of functional fabrics, negative ion fabrics have become one of the main products. Negative ion fabrics have many functions, such as promoting metabolism, purifying blood, and sterilizing / inhibiting bacteria. Currently, fabrics that release negative ions are generally based on negative ion mineral powder, and are mostly made by impregnating the fabric in a negative ion post-treatment solution and then drying it. The negative ion mineral powder on the surface of these fabrics is easily lost due to friction from wearing and washing, causing a decline in negative ion performance. At the same time, the static electricity of the fabric itself can also cause localized static buildup. Summary of the Invention

[0004] To address the problems in existing technologies, this invention provides a method for preparing antibacterial and antistatic fabrics based on negative ions. This method solves the problem of poor stability of negative ion materials in existing fabrics. By utilizing the solubility, adhesion, and encapsulation properties of polyvinyl alcohol, as well as the conductivity of polyvinyl alcohol after sintering and polycondensation, a homogeneous electronic conduction network is formed on the surface of tourmaline powder. This improves the homogeneous dispersion of negative ion materials in the fabric finishing solution and their subsequent water-washing resistance on the fabric.

[0005] To achieve the above technical objectives, the technical solution of the present invention is as follows: A method for preparing an antibacterial and antistatic fabric based on negative ions includes the following steps: Step 1: Tourmaline and sodium chloride are blended, and ethanol is added and stirred to form a suspension colloid. The mixture is then ground at a constant temperature for 2-4 hours to obtain a homogeneous colloidal solution. Finally, water is added for dissolution, and the solution is filtered and dried to obtain fine tourmaline powder. The mass ratio of tourmaline to sodium chloride is 3:4-5, the mass ratio of ethanol to sodium chloride is 2-3:1, and the stirring speed is 300-500 r / min. The constant temperature grinding treatment is performed at 5-10℃, the grinding pressure is 0.5-0.6 MPa, the volume ratio of water to the homogeneous colloidal solution is 5:1-2, and the drying temperature is 100-120℃. This step utilizes the solid blending of tourmaline and sodium chloride, and the small particle size of sodium chloride, to... Sodium chloride solid is dispersed around tourmaline. When ethanol is added, the ethanol and sodium chloride directly form a colloid under stirring. This colloid consists of fine sodium chloride particles and is homogeneously dispersed around the tourmaline. During the isothermal grinding process, the sodium chloride particles act as grinding stones to refine the tourmaline, greatly reducing its particle size. That is, low-particle-size tourmaline is obtained through low-temperature grinding. The obtained low-particle-size tourmaline is homogeneously dispersed in a sodium chloride-ethanol colloidal solution. With the addition of water, not only is the colloid completely dissolved, but the sodium chloride is also dissolved, resulting in a mixed suspension of tourmaline. During filtration, the low-particle-size tourmaline is directly stripped from the liquid, yielding fine tourmaline powder. Step 2: Polyvinyl alcohol is added to glycerol and stirred at a constant temperature to obtain a polyvinyl alcohol-glycerol solution. Then, tourmaline powder is added and subjected to constant temperature ultrasonic treatment for 10-20 minutes. After hot filtration, it is sprayed into a cooling box to obtain gelled tourmaline powder. The mass ratio of polyvinyl alcohol to glycerol is 1:5-8. The constant temperature stirring temperature is 120-130℃, the stirring speed is 300-500 r / min, the mass ratio of tourmaline powder to polyvinyl alcohol is 1:1.5-2, the constant temperature ultrasonic treatment temperature is 130-140℃, the ultrasonic frequency is 100-120kHz, the hot filtration temperature is 120℃, and the cooling box temperature is 10-20℃. This step utilizes the solubility characteristics of polyvinyl alcohol and glycerol to form a liquid phase solution. Then, the solute dispersion and liquid flowability of the solution ensure that a liquid film system of polyvinyl alcohol-glycerol is formed on the surface of tourmaline powder. Under the action of ultrasound, the internal air bubbles of the liquid film are squeezed out and adhered to the surface of the tourmaline powder, thereby obtaining tourmaline powder coated with a liquid film. In the cooling chamber, a polyvinyl alcohol-glycerol liquid film forms a gel structure, which coats the surface of tourmaline. At this time, the filtered liquid phase coated tourmaline powder enters the cooling chamber in a dispersed state and completes deposition during the gel formation process on the surface, thus obtaining gelled tourmaline powder. Step 3: Add gelled tourmaline powder to the reactor, then add diethyl ether until completely submerged. After standing for 20-30 minutes, filter and dry to obtain polyvinyl alcohol-coated tourmaline powder. Finally, heat treatment is performed to obtain polyvinyl alcohol condensate-coated tourmaline powder. The standing temperature is 20-40℃, the drying temperature is 40-50℃, and the heating treatment temperature is 250-260℃. During this process, the gelled tourmaline powder is placed in the reactor in granular form. Diethyl ether is slowly poured in and completely submerged. At this time, diethyl ether is soluble in glycerol but does not dissolve polyvinyl alcohol and tourmaline particles. Glycerol is also insoluble in polyvinyl alcohol at room temperature. Therefore, during the standing process at room temperature, diethyl ether dissolves and disperses the glycerol, while the polyvinyl alcohol and tourmaline powder remain in place, thus achieving the desired effect. The oil is removed non-destructively, and ether has good volatility, which can quickly remove it from the tourmaline powder coated with polyvinyl alcohol. Therefore, in the heating process, polyvinyl alcohol is converted into a polymer containing conjugated double bonds, which are coated on the surface of tourmaline powder. The conjugated double bond polymer on the surface of tourmaline powder has good conductivity, which can quickly transfer the negative ions generated by tourmaline powder. It should be noted that the polyvinyl alcohol on the tourmaline powder can be tightly adhered to the surface of tourmaline powder by utilizing the film-forming properties of glycerol, and the dispersibility of polyvinyl alcohol on glycerol can be used to ensure that polyvinyl alcohol is homogeneously dispersed and tightly adhered to the surface of tourmaline powder. As polyvinyl alcohol undergoes in-situ condensation during the heating process, a stable and uniform condensate is formed on the surface of tourmaline powder, ensuring a uniform conductive network on the surface of tourmaline powder and quickly transferring and dispersing electrons. Step 4: Add tourmaline powder coated with polyvinyl alcohol condensate to waterborne polyurethane, then add UV stabilizer, chitosan, dispersant and deionized water, and stir to obtain composite finishing solution. The mass ratio of the composite finishing solution is: 10-14 parts polyvinyl alcohol condensate, 12-15 parts waterborne polyurethane, 1-2 parts UV stabilizer, 4-6 parts chitosan, 0.1-0.8 parts dispersant and 20-25 parts deionized water. The UV stabilizer is dilauryl dibutyltin, and the dispersant is fatty acid diethanolamide. The stirring speed is 100-200 r / min. Step 5: Immerse the polyester fabric in a sodium bicarbonate solution for 20-30 minutes, then immerse it in a hydrogen peroxide solution for 1-2 hours. Next, remove the polyester fabric and immerse it in the composite finishing solution, allowing for thorough shaking and padding. Finally, pre-dry and bake the polyester fabric to obtain an antibacterial and antistatic fabric. The sodium bicarbonate solution used is a saturated sodium bicarbonate solution, with the polyester fabric concentration in the solution being 300-500 g / L. The hydrogen peroxide concentration is 0.1-0.8%. The pre-drying temperature is 100-120℃, and the baking temperature is 80-100℃. This step utilizes the sodium bicarbonate and hydrogen peroxide solutions to clarify the entire polyester fabric, completely removing surface impurities, improving the surface stability and adhesion of the polyester fabric, enhancing the adhesion of the composite finishing solution to the polyester fabric, and also improving the fabric's wash resistance.

[0006] As can be seen from the above description, the present invention has the following advantages: 1. This invention solves the problem of poor stability of negative ion materials in existing fabrics. It utilizes the solubility, adhesion and encapsulation of polyvinyl alcohol, as well as the conductivity of polyvinyl alcohol after sintering polycondensation, to form a homogeneous electronic conduction network on the surface of tourmaline powder, thereby improving the homogeneous dispersion of negative ion materials in the fabric finishing solution and the subsequent water-washing resistance of the fabric. 2. This invention utilizes the solubility of polyvinyl alcohol and glycerin, which not only improves the adhesion of polyvinyl alcohol to the surface of tourmaline powder, but also ensures a homogeneous conductive network of polyvinyl alcohol condensate on the surface of tourmaline powder, thereby improving the antistatic properties of the fabric. At the same time, the adhesiveness of polyvinyl alcohol and the film-forming properties of glycerin improve the stability of polyvinyl alcohol on the surface of tourmaline powder and reduce the difficulty of solvent removal. 3. In this invention, chitosan and polyvinyl alcohol condensate encapsulate tourmaline powder to form a charge adsorption system, which effectively improves the stability of chitosan on the entire fabric. At the same time, the stable release system of negative ions from tourmaline powder, combined with the conjugated double bond system of polyvinyl alcohol condensate, forms a negative ion conduction network, which improves the antibacterial properties of the fabric. Detailed Implementation

[0007] The present invention will be described in detail with reference to the embodiments, but the claims of the present invention are not intended to limit the scope of the invention. Example 1

[0008] A method for preparing an antibacterial and antistatic fabric based on negative ions includes the following steps: Step 1: Tourmaline and sodium chloride are mixed, and ethanol is added and stirred to form a suspension colloid. Then, the mixture is ground at a constant temperature for 4 hours to obtain a homogeneous colloidal solution. Finally, water is added for dissolution, filtered, and dried to obtain tourmaline fine powder. The mass ratio of tourmaline to sodium chloride is 3:4, the mass ratio of ethanol to sodium chloride is 2:1, and the stirring speed is 500 r / min. The temperature of the constant temperature grinding treatment is 10℃, the grinding pressure is 0.6 MPa, the volume ratio of water to the homogeneous colloidal solution is 5:1, and the drying temperature is 120℃. Step 2: Polyvinyl alcohol is added to glycerol and stirred at a constant temperature to obtain polyvinyl alcohol glycerol solution. Then, tourmaline powder is added and ultrasonically treated at a constant temperature for 20 minutes. After hot filtration, it is sprayed into a cooling box to obtain gelled tourmaline powder. The mass ratio of polyvinyl alcohol to glycerol is 1:5. The temperature of the constant temperature stirring is 130℃ and the stirring speed is 500 r / min. The mass ratio of tourmaline powder to polyvinyl alcohol is 1:1.5. The temperature of the constant temperature ultrasonic treatment is 140℃ and the ultrasonic frequency is 120 kHz. The temperature of the hot filtration is 120℃ and the temperature of the cooling box is 20℃. Step 3: Add gelled tourmaline powder to the reactor, then add diethyl ether until completely submerged, let stand for 30 minutes, filter and dry to obtain polyvinyl alcohol-coated tourmaline powder, and finally heat treatment to obtain polyvinyl alcohol condensate-coated tourmaline powder. The standing temperature is 40°C, the drying temperature is 50°C, and the heating treatment temperature is 260°C. Step 4: Polyvinyl alcohol condensate coated with tourmaline powder is added to waterborne polyurethane, followed by the addition of UV stabilizer, chitosan, dispersant, and deionized water. The mixture is stirred to obtain a composite finishing solution. The mass ratio of the composite finishing solution is: 10 parts polyvinyl alcohol condensate, 12 parts waterborne polyurethane, 1 part UV stabilizer, 4 parts chitosan, 0.1 parts dispersant, and 20 parts deionized water. The UV stabilizer is dibutyltin lauryl, and the dispersant is fatty acid diethanolamide. The stirring speed is 200 r / min. Step 5: Immerse the polyester fabric in sodium bicarbonate solution for 30 minutes, then immerse it in hydrogen peroxide solution for 2 hours. Next, remove the polyester fabric and immerse it in the composite finishing solution, where it is thoroughly shaken and rolled. Finally, pre-dry and bake the polyester fabric to obtain the antibacterial and antistatic fabric. The sodium bicarbonate solution used is a saturated sodium bicarbonate solution, and the concentration of the polyester fabric in the sodium bicarbonate solution is 300 g / L. The mass concentration of the hydrogen peroxide is 0.1%. The pre-drying temperature is 120°C, and the baking temperature is 100°C. Example 2

[0009] A method for preparing an antibacterial and antistatic fabric based on negative ions includes the following steps: Step 1: Tourmaline and sodium chloride are mixed, and ethanol is added and stirred to form a suspension colloid. Then, the mixture is ground at a constant temperature for 2 hours to obtain a homogeneous colloidal solution. Finally, water is added for dissolution, filtered, and dried to obtain tourmaline fine powder. The mass ratio of tourmaline to sodium chloride is 3:5, the mass ratio of ethanol to sodium chloride is 3:1, and the stirring speed is 300 r / min. The temperature of the constant temperature grinding treatment is 5℃, the grinding pressure is 0.5 MPa, the volume ratio of water to the homogeneous colloidal solution is 5:2, and the drying temperature is 100℃. Step 2: Polyvinyl alcohol is added to glycerol and stirred at a constant temperature to obtain polyvinyl alcohol glycerol solution. Then, tourmaline powder is added and ultrasonically treated at a constant temperature for 10 minutes. After hot filtration, it is sprayed into a cooling box to obtain gelled tourmaline powder. The mass ratio of polyvinyl alcohol to glycerol is 1:8. The constant temperature stirring temperature is 120℃ and the stirring speed is 300 r / min. The mass ratio of tourmaline powder to polyvinyl alcohol is 1:2. The constant temperature ultrasonic treatment temperature is 130℃ and the ultrasonic frequency is 100 kHz. The hot filtration temperature is 120℃ and the cooling box temperature is 10℃. Step 3: Add gelled tourmaline powder to the reactor, then add ether until completely submerged, let stand for 20 minutes, filter and dry to obtain polyvinyl alcohol-coated tourmaline powder, and finally heat treatment to obtain polyvinyl alcohol condensate-coated tourmaline powder. The standing temperature is 20°C, the drying temperature is 40°C, and the heating treatment temperature is 250°C. Step 4: Polyvinyl alcohol condensate coated with tourmaline powder is added to waterborne polyurethane, followed by the addition of UV stabilizer, chitosan, dispersant, and deionized water. The mixture is stirred to obtain a composite finishing solution. The mass ratio of the composite finishing solution is: 14 parts polyvinyl alcohol condensate, 15 parts waterborne polyurethane, 2 parts UV stabilizer, 6 parts chitosan, 0.8 parts dispersant, and 25 parts deionized water. The UV stabilizer is dibutyltin lauryl sulfate, and the dispersant is fatty acid diethanolamide. The stirring speed is 100 r / min. Step 5: Immerse the polyester fabric in sodium bicarbonate solution for 20 minutes, then immerse it in hydrogen peroxide solution for 1 hour. Next, remove the polyester fabric and immerse it in the composite finishing solution, where it is thoroughly shaken and rolled. Finally, pre-dry and bake the polyester fabric to obtain the antibacterial and antistatic fabric. The sodium bicarbonate solution used is a saturated sodium bicarbonate solution, and the concentration of the polyester fabric in the sodium bicarbonate solution is 500 g / L. The mass concentration of the hydrogen peroxide is 0.8%. The pre-drying temperature is 100℃, and the baking temperature is 80℃. Example 3

[0010] A method for preparing an antibacterial and antistatic fabric based on negative ions includes the following steps: Step 1: Tourmaline and sodium chloride are mixed, and ethanol is added and stirred to form a suspension colloid. Then, the mixture is ground at a constant temperature for 3 hours to obtain a homogeneous colloidal solution. Finally, water is added for dissolution, filtered, and dried to obtain tourmaline fine powder. The mass ratio of tourmaline to sodium chloride is 3:4, the mass ratio of ethanol to sodium chloride is 2:1, and the stirring speed is 400 r / min. The temperature of the constant temperature grinding treatment is 8℃, the grinding pressure is 0.6 MPa, the volume ratio of water to the homogeneous colloidal solution is 5:1, and the drying temperature is 110℃. Step 2: Polyvinyl alcohol is added to glycerol and stirred at a constant temperature to obtain polyvinyl alcohol glycerol solution. Then, tourmaline powder is added and ultrasonically treated at a constant temperature for 15 minutes. After hot filtration, it is sprayed into a cooling box to obtain gelled tourmaline powder. The mass ratio of polyvinyl alcohol to glycerol is 1:7. The constant temperature stirring temperature is 125℃ and the stirring speed is 400 r / min. The mass ratio of tourmaline powder to polyvinyl alcohol is 1:1.8. The constant temperature ultrasonic treatment temperature is 135℃ and the ultrasonic frequency is 110 kHz. The hot filtration temperature is 120℃ and the cooling box temperature is 15℃. Step 3: Add gelled tourmaline powder to the reactor, then add diethyl ether until completely submerged, let stand for 25 minutes, filter and dry to obtain polyvinyl alcohol-coated tourmaline powder, and finally heat treatment to obtain polyvinyl alcohol condensate-coated tourmaline powder. The standing temperature is 30°C, the drying temperature is 45°C, and the heating treatment temperature is 255°C. Step 4: Polyvinyl alcohol condensate coated with tourmaline powder is added to waterborne polyurethane, followed by the addition of UV stabilizer, chitosan, dispersant, and deionized water. The mixture is stirred to obtain a composite finishing solution. The mass ratio of the composite finishing solution is: 12 parts polyvinyl alcohol condensate, 14 parts waterborne polyurethane, 2 parts UV stabilizer, 5 parts chitosan, 0.5 parts dispersant, and 23 parts deionized water. The UV stabilizer is dibutyltin lauryl, and the dispersant is fatty acid diethanolamide. The stirring speed is 150 r / min. Step 5: Immerse the polyester fabric in sodium bicarbonate solution for 25 minutes, then immerse it in hydrogen peroxide solution for 2 hours. Next, remove the polyester fabric and immerse it in the composite finishing solution, where it is thoroughly shaken and rolled. Finally, pre-dry and bake the polyester fabric to obtain the antibacterial and antistatic fabric. The sodium bicarbonate solution used is a saturated sodium bicarbonate solution, and the concentration of the polyester fabric in the sodium bicarbonate solution is 400 g / L. The mass concentration of the hydrogen peroxide is 0.6%. The pre-drying temperature is 110℃, and the baking temperature is 90℃.

[0011] Comparative Example 1 A method for preparing a negative ion fabric includes the following steps: Step 1: Tourmaline and sodium chloride are mixed, and ethanol is added and stirred to form a suspension colloid. Then, the mixture is ground at a constant temperature for 3 hours to obtain a homogeneous colloidal solution. Finally, water is added for dissolution, filtered, and dried to obtain tourmaline fine powder. The mass ratio of tourmaline to sodium chloride is 3:4, the mass ratio of ethanol to sodium chloride is 2:1, and the stirring speed is 400 r / min. The temperature of the constant temperature grinding treatment is 8℃, the grinding pressure is 0.6 MPa, the volume ratio of water to the homogeneous colloidal solution is 5:1, and the drying temperature is 110℃. Step 2: Add tourmaline powder to waterborne polyurethane, then add UV stabilizer, chitosan, dispersant and deionized water, and stir to obtain a composite finishing solution. The mass ratio of the composite finishing solution is: 12 parts tourmaline powder, 14 parts waterborne polyurethane, 2 parts UV stabilizer, 5 parts chitosan, 0.5 parts dispersant and 23 parts deionized water. The UV stabilizer is dibutyltin lauryl, the dispersant is fatty acid diethanolamide, and the stirring speed is 150 r / min. Step 3: Immerse the polyester fabric in sodium bicarbonate solution for 25 minutes, then immerse it in hydrogen peroxide solution for 2 hours. Next, remove the polyester fabric and immerse it in the composite finishing solution, where it is thoroughly shaken and rolled. Finally, pre-dry and bake the polyester fabric to obtain the negative ion fabric. The sodium bicarbonate solution used is a saturated sodium bicarbonate solution, and the concentration of the polyester fabric in the sodium bicarbonate solution is 400 g / L. The mass concentration of the hydrogen peroxide is 0.6%. The pre-drying temperature is 110℃, and the baking temperature is 90℃.

[0012] Comparative Example 2 A method for preparing an antibacterial and antistatic fabric based on negative ions includes the following steps: Step 1: Tourmaline and sodium chloride are mixed, and ethanol is added and stirred to form a suspension colloid. Then, the mixture is ground at a constant temperature for 3 hours to obtain a homogeneous colloidal solution. Finally, water is added for dissolution, filtered, and dried to obtain tourmaline fine powder. The mass ratio of tourmaline to sodium chloride is 3:4, the mass ratio of ethanol to sodium chloride is 2:1, and the stirring speed is 400 r / min. The temperature of the constant temperature grinding treatment is 8℃, the grinding pressure is 0.6 MPa, the volume ratio of water to the homogeneous colloidal solution is 5:1, and the drying temperature is 110℃. Step 2: Polyvinyl alcohol is added to glycerol and stirred at a constant temperature to obtain polyvinyl alcohol glycerol solution. Then, tourmaline powder is added and ultrasonically treated at a constant temperature for 15 minutes. After hot filtration, it is sprayed into a cooling box to obtain gelled tourmaline powder. The mass ratio of polyvinyl alcohol to glycerol is 1:7. The constant temperature stirring temperature is 125℃ and the stirring speed is 400 r / min. The mass ratio of tourmaline powder to polyvinyl alcohol is 1:1.8. The constant temperature ultrasonic treatment temperature is 135℃ and the ultrasonic frequency is 110 kHz. The hot filtration temperature is 120℃ and the cooling box temperature is 15℃. Step 3: Add gelled tourmaline powder to the reactor, then add diethyl ether until completely submerged, let stand for 25 minutes, filter and dry to obtain polyvinyl alcohol-coated tourmaline powder, and finally heat treatment to obtain polyvinyl alcohol condensate-coated tourmaline powder. The standing temperature is 30°C, the drying temperature is 45°C, and the heating treatment temperature is 255°C. Step 4: Polyvinyl alcohol condensate coated with tourmaline powder is added to waterborne polyurethane, followed by the addition of UV stabilizer, dispersant, and deionized water. The mixture is stirred to obtain a composite finishing solution. The mass ratio of the composite finishing solution is: 12 parts polyvinyl alcohol condensate, 14 parts waterborne polyurethane, 2 parts UV stabilizer, 0.5 parts dispersant, and 23 parts deionized water. The UV stabilizer is dilauryl dibutyltin, and the dispersant is fatty acid diethanolamide. The stirring speed is 150 r / min. Step 5: Immerse the polyester fabric in sodium bicarbonate solution for 25 minutes, then immerse it in hydrogen peroxide solution for 2 hours. Next, remove the polyester fabric and immerse it in the composite finishing solution, where it is thoroughly shaken and rolled. Finally, pre-dry and bake the polyester fabric to obtain the antibacterial and antistatic fabric. The sodium bicarbonate solution used is a saturated sodium bicarbonate solution, and the concentration of the polyester fabric in the sodium bicarbonate solution is 400 g / L. The mass concentration of the hydrogen peroxide is 0.6%. The pre-drying temperature is 110℃, and the baking temperature is 90℃.

[0013] Comparative Example 3 A method for preparing an antibacterial and antistatic fabric based on negative ions includes the following steps: Step 1: Add UV stabilizer, chitosan, dispersant and deionized water to waterborne polyurethane and stir to obtain composite finishing solution. The mass ratio of the composite finishing solution is: 14 parts waterborne polyurethane, 2 parts UV stabilizer, 5 parts chitosan, 0.5 parts dispersant and 23 parts deionized water. The UV stabilizer is dilauryl dibutyltin, and the dispersant is fatty acid diethanolamide. The stirring speed is 150 r / min. Step 2: Immerse the polyester fabric in a sodium bicarbonate solution for 25 minutes, then remove it and immerse it in a hydrogen peroxide solution for 2 hours. Next, remove the polyester fabric and immerse it in a composite finishing solution, where it is thoroughly shaken and rolled. Finally, pre-dry and bake the polyester fabric to obtain an antibacterial and antistatic fabric. The sodium bicarbonate solution used is a saturated sodium bicarbonate solution, and the concentration of the polyester fabric in the sodium bicarbonate solution is 400 g / L. The mass concentration of the hydrogen peroxide is 0.6%. The pre-drying temperature is 110°C, and the baking temperature is 90°C.

[0014] Performance testing The fabrics prepared in Examples 1-3 and Comparative Examples 1-3 were used for experimental testing, and the results are shown below: Escherichia coli inhibition rate % Staphylococcus aureus inhibition rate % <![CDATA[Negative ion release amount (ions / cm 3 ).]]> Example 1 99.85 99.49 2897 Example 2 99.96 99.57 2739 Example 3 99.97 99.56 3079 Comparative Example 1 99.65 99.23 2539 Comparative Example 2 98.45 98.27 2708 Comparative Example 3 99.54 99.31 - The above-mentioned test fabric was subjected to 100 washes before the experiment was conducted, and the results are as follows: Escherichia coli inhibition rate % Staphylococcus aureus inhibition rate % <![CDATA[Negative ion release amount (ions / cm 3 )]]> Example 1 99.46 99.35 2537 Example 2 99.59 99.24 2569 Example 3 99.56 99.27 2797 Comparative Example 1 89.65 87.56 1963 Comparative Example 2 98.15 97.62 2393 Comparative Example 3 93.17 91.56 - The test standard for the negative ion release is GB / T 30128-2013, the antibacterial performance is tested using the shaking method, and the standard for water washing is GB / T 5713-2013.

[0015] The data comparison above shows that the fabric prepared by this technical solution uses polyurethane as a binder to encapsulate tourmaline powder with negative ion particles—polyvinyl alcohol condensate. The conductivity of the polyvinyl alcohol condensate enables negative ion transfer, effectively increasing the release of negative ions (comparison of Examples 1-3 and Comparative Example 1). Simultaneously, under the action of the conductive network, negative ions are uniformly distributed on the fabric surface, inhibiting bacterial deposition, especially anonymized bacteria. The comparison between Examples 1-3 and Comparative Example 1 demonstrates that the encapsulation and conductivity of tourmaline powder on the surface of the polyvinyl alcohol condensate enables rapid negative ion conduction, preventing negative ion accumulation and improving the stability of tourmaline powder on the fabric. The comparison between Example 3 and Comparative Examples 2-3 shows that the negative ion system of tourmaline powder encapsulated by polyvinyl alcohol condensate has certain antibacterial properties. Furthermore, its combination with chitosan can form a stable chitosan material, thus ensuring overall antibacterial properties.

[0016] It is understood that the above detailed description of the present invention is for illustrative purposes only and is not intended to limit the technical solutions described in the embodiments of the present invention. Those skilled in the art should understand that modifications or equivalent substitutions can still be made to the present invention to achieve the same technical effects; as long as the usage requirements are met, they are all within the protection scope of the present invention.

Claims

1. A method for preparing an anti-bacterial and anti-static fabric based on negative ions, characterized in that: It comprises the following steps: Step 1, blend tourmaline with sodium chloride, and add ethanol to stir to form a suspension colloid, then constant temperature grinding treatment for 2-4h, to obtain a homogeneous colloid liquid, finally add water to dilute, filter and dry to obtain tourmaline powder; Step 2, add polyvinyl alcohol to glycerol and constant temperature stirring to obtain polyvinyl alcohol glycerol liquid, then add tourmaline powder and constant temperature ultrasonic treatment for 10-20min, filter while hot and spray into a cooling box to obtain jelly tourmaline powder; Step 3, add jelly tourmaline powder into a reaction kettle, then add diethyl ether to completely immerse, stand for 20-30min, filter and dry to obtain polyvinyl alcohol wrapped tourmaline powder, finally heat treatment to obtain polyvinyl alcohol polycondensate wrapped tourmaline powder; Step 4, add polyvinyl alcohol polycondensate wrapped tourmaline powder into water-based polyurethane, then add ultraviolet resistant agent, chitosan, dispersing agent and deionized water, and stir to obtain a composite finishing liquid; Step 5, put polyester fabric into sodium bicarbonate solution and soak for 20-30min, take out and soak in hydrogen peroxide solution for 1-2h, then take out the polyester fabric and soak in the composite finishing liquid for sufficient oscillation padding, finally pre-dry and bake to obtain antibacterial and antistatic fabric.

2. The method of claim 1, wherein the method is characterized by: The mass ratio of tourmaline to sodium chloride in step 1 is 3:4-5, the mass ratio of ethanol to sodium chloride is 2-3:1, and the stirring speed is 300-500r / min; the temperature of constant temperature grinding treatment is 5-10℃, and the grinding pressure is 0.5-0.6MPa.

3. The method of claim 1, wherein the method is characterized by: The volume ratio of water to homogeneous colloid liquid in step 1 is 5:1-2, and the drying temperature is 100-120℃.

4. The method of claim 1, wherein the method is characterized by: The mass ratio of polyvinyl alcohol to glycerol in step 2 is 1:5-8, the temperature of constant temperature stirring is 120-130℃, and the stirring speed is 300-500r / min.

5. The method of claim 1, wherein the method is characterized by: The mass ratio of tourmaline powder to polyvinyl alcohol in step 2 is 1:1.5-2, the temperature of constant temperature ultrasonic treatment is 130-140℃, the ultrasonic frequency is 100-120kHz, the temperature of hot filtering is 120℃, and the temperature of cooling box is 10-20℃.

6. The method of claim 1, wherein the method is characterized by: The standing temperature in step 3 is 20-40℃, and the drying temperature is 40-50℃; the temperature of heat treatment is 250-260℃.

7. The method of claim 1, wherein the method further comprises the step of: 7.

1. washing the fabric with water at a temperature of 30-35°C for 10-15 minutes. The mass ratio of composite finishing liquid in step 4 is: polyvinyl alcohol polycondensate 10-14 parts, water-based polyurethane 12-15 parts, ultraviolet resistant agent 1-2 parts, chitosan 4-6 parts, dispersing agent 0.1-0.8 parts, and deionized water 20-25 parts, and the stirring speed is 100-200r / min.

8. The method of claim 7, wherein the method further comprises the step of: The ultraviolet resistant agent is dilauryl dibutyl tin, and the dispersing agent is fatty acid diethanolamide. ​ 9. The method of claim 1, wherein the method further comprises the step of: 9.

1. washing the fabric with water at a temperature of 30-40°C for 10-15 minutes. The sodium bicarbonate solution in step 5 is saturated sodium bicarbonate solution, and the concentration of polyester fabric in sodium bicarbonate solution is 300-500g / L, and the mass concentration of hydrogen peroxide is 0.1-0.8%.

10. The method of claim 1, wherein the method is characterized by: The pre-drying temperature in step 5 is 100-120℃, and the baking temperature is 80-100℃.