Ultrahigh molecular weight polyethylene antibacterial fabric and preparation method thereof

Abstract

The invention relates to the technical field of fabric preparation, in particular to an ultra-high molecular weight polyethylene antibacterial fabric and a preparation method thereof. The preparation method of the antibacterial fabric comprises the following steps: heating and dissolving ultra-high molecular weight polyethylene in a solvent to form a uniform polymer solution; adding an antibacterial agent into the polymer solution, carrying out ultrasonic treatment or stirring for uniform dispersion, and filtering to remove impurities to obtain a spinning solution; a dry gel spinning method is adopted, a spinning solution is extruded into airflow from a spinning nozzle, a solvent is volatilized to obtain dry gel collagen filaments, and the ultra-high molecular weight polyethylene antibacterial fibers are obtained through high-power hot stretching. The ultra-high molecular weight polyethylene antibacterial fibers are spun into yarns, and the ultra-high molecular weight polyethylene antibacterial yarn is prepared through a weaving process. The antibacterial agent is directly added into the spinning solution, so that the antibacterial agent is uniformly distributed inside and on the surface of the fiber, the overall antibacterial effect of the fabric is improved, the antibacterial effect is still remarkable and lasting even after multiple times of washing, and the problem that the antibacterial performance is reduced after washing is solved.

Description

Technical Field

[0001] The invention relates to the technical field of fabric preparation, and in particular to an ultra-high molecular weight polyethylene antibacterial fabric and a preparation method thereof. Background Art

[0002] With the improvement of living standards and people's health awareness, consumers have put forward higher requirements for the hygiene and health performance of household products. Especially in hot and humid environments, textiles that come into contact with the human body, such as mats and mattresses, are very likely to become breeding grounds for bacteria, mold and mites, among which Staphylococcus aureus, Escherichia coli and dust mites are the most common and numerous. This not only causes bad odors, but also easily causes skin allergies, asthma, bronchitis, nephritis, allergic rhinitis and other diseases in users, endangering human sleep quality and human health.

[0003] At present, polyester fabrics are used for cooling mats and mattresses, but polyester fabrics have poor moisture absorption and poor air permeability. As summer bedding, they are hot and airtight. In addition, most of the current antibacterial fabrics are prepared by coating with antibacterial agents. The binding force between the antibacterial agent and the fabric is weak, resulting in the fabric's washing fastness failing to meet the requirements, and the antibacterial performance is not long-lasting, and it is unable to effectively inhibit the growth of bacteria and mold in the long term. Traditional organic antibacterial agents containing chlorine, bromine, and phosphorus may also have potential hazards to the environment and human body, and cannot meet the requirements of environmental protection and safety.

[0004] Therefore, the present invention conducts in-depth research on the preparation method of antibacterial fabrics to obtain multifunctional textiles with long-lasting antibacterial properties and good comfort. Summary of the invention

[0005] The purpose of the present invention is to solve the above-mentioned deficiencies in the prior art and to provide an ultra-high molecular weight polyethylene antibacterial fabric and a preparation method thereof.

[0006] The purpose of the present invention is achieved by the following technical solution: A method for preparing an ultra-high molecular weight polyethylene antibacterial fabric, comprising the following preparation steps:

[0007] A1. Heat and dissolve ultra-high molecular weight polyethylene in a solvent to form a uniform polymer solution;

[0008] A2, adding the antibacterial agent into the polymer solution, dispersing it evenly by ultrasonic or stirring, and filtering and removing impurities to obtain a spinning solution;

[0009] A3, using dry gel spinning method, the spinning solution is extruded from the spinneret into the air flow, the solvent evaporates to obtain dry gel precursor, and then high-power heat stretching is performed to obtain ultra-high molecular weight polyethylene antibacterial fiber;

[0010] A4. Spinning the ultra-high molecular weight polyethylene antibacterial fiber into yarn, and preparing the ultra-high molecular weight polyethylene antibacterial fabric through a weaving process.

[0011] Furthermore, in step A1, the solvent is at least one of decahydronaphthalene, paraffin oil, white oil, cyclohexane, and toluene.

[0012] Furthermore, in step A2, the antibacterial agent is at least one of nano silver antibacterial agent, nano zinc oxide antibacterial agent, and nano copper oxide antibacterial agent, and the added amount of the antibacterial agent is 0.1-1wt%.

[0013] Furthermore, the preparation method of the nano silver antibacterial agent comprises the following steps: dissolving urea in anhydrous ethanol and stirring evenly, adding butyl titanate thereto, adjusting the pH of the system to 3-4, continuing to stir evenly, then adding a silver nitrate aqueous solution thereto, continuing to stir until the solution system shows a Tyndall effect, stopping, coating the obtained transparent gel on a substrate and drying it, collecting and grinding to obtain the nano silver antibacterial agent.

[0014] Furthermore, the molar ratio of urea, butyl titanate and silver nitrate is 1:1:0.01-0.03 respectively.

[0015] Furthermore, the nano zinc oxide antibacterial agent is modified nano zinc oxide coated with ethylene-ethyl acetate copolymer.

[0016] Furthermore, the preparation method of the modified nano zinc oxide comprises the following steps:

[0017] B1. Dissolve zinc salt and citric acid in deionized water, heat and stir evenly, then add ethylene glycol, adjust the pH of the system to neutral, continue stirring until evenly distributed, dry in an oven, grind, and calcine at high temperature to obtain nano zinc oxide powder;

[0018] B2. The nano zinc oxide powder obtained in step B1 is dispersed in anhydrous ethanol and stirred, and then ultrasonically dispersed to obtain a dispersion, to which an aluminum-titanium composite coupling agent is added and heated and stirred, and then stearic acid is added and stirred evenly, and finally the modified nano zinc oxide is obtained by centrifugation, washing and drying.

[0019] Furthermore, step A2 also includes adding the plant pigment into the polymer solution and fully dispersing it before filtering.

[0020] Further, in step A4, the fineness of the ultra-high molecular weight polyethylene antibacterial fiber spun into yarn ranges from 200 to 500D, and the antibacterial fabric is woven using a mountain-shaped structure. Preferably, the warp density of the antibacterial fabric is 130-140 strands / 10cm, the weft density is 100-110 strands / 10cm, and the surface density is 200-250g / m 2 , thickness is 0.4-0.6mm.

[0021] The invention prepares an ultra-high molecular weight polyethylene antibacterial fabric through the preparation method, which has significant antibacterial effect and good washability. After multiple washings, the fabric still maintains a high antibacterial rate and has long-lasting antibacterial, antibacterial, deodorizing and anti-mite effects.

[0022] The beneficial effects of the present invention are:

[0023] (1) The present invention proposes a method for preparing an ultra-high molecular weight polyethylene antibacterial fabric, which comprises adding an antibacterial agent to a spinning solution for spinning, and then using a weaving process to prepare a fabric with a long-lasting antibacterial function, which can significantly improve the antibacterial performance, durability and comfort of such ultra-high molecular weight polyethylene fabric, while maintaining its aesthetic and environmental characteristics;

[0024] (2) The antibacterial fabric prepared by the present invention by adding an antibacterial agent to a polyethylene polymer solution for spinning has a significant antibacterial effect, and the inhibition rate against Escherichia coli and Staphylococcus aureus reaches more than 99%; and it essentially solves the problem that the antibacterial agent in the antibacterial agent coating process is easy to fall off, resulting in unsatisfactory antibacterial effect and obvious decrease in antibacterial performance after washing. After washing 50 times, the antibacterial fabric prepared by the present invention can still achieve an inhibition rate of more than 98% against Escherichia coli and Staphylococcus aureus;

[0025] (3) The present invention uses ultra-high molecular weight polyethylene fiber to prepare antibacterial fabrics. Ultra-high molecular weight polyethylene fiber has an ultra-cool feeling and can produce an instantaneous cool temperature of 4-5°C when in contact with the skin. It is used in the production of ice-cooling mats and has good antibacterial, antibacterial, deodorizing and anti-mite effects, and is not prone to moisture and mold growth during the rainy season.

[0026] (4) The present invention directly adds the antibacterial agent into the spinning solution, so that the antibacterial component is evenly distributed inside and on the surface of the fiber, thereby improving the overall antibacterial effect of the fabric. Even after multiple washings, the antibacterial effect is still significant and lasting, thus solving the problem of decreased antibacterial performance after washing;

[0027] (5) The present invention can significantly reduce the amount of antibacterial agent added by making the antibacterial agent in-house, thereby solving the problem of reduced fiber mechanical properties due to excessive addition of antibacterial agent. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a picture of the warp mountain twill weave of the fabric described in Example 3 on a machine (left) and a simulation effect picture (right). DETAILED DESCRIPTION

[0029] In order to facilitate the understanding of those skilled in the art, the present invention is further described below in conjunction with embodiments, and the contents mentioned in the implementation modes are not intended to limit the present invention.

[0030] As a classic embodiment of the present invention, the present invention provides a method for preparing an ultra-high molecular weight polyethylene antibacterial fabric, comprising the following preparation steps:

[0031] A1. Heat and dissolve ultra-high molecular weight polyethylene in a solvent to form a uniform polymer solution;

[0032] A2, adding the antibacterial agent into the polymer solution, dispersing it evenly by ultrasonic or stirring, and filtering and removing impurities to obtain a spinning solution;

[0033] A3, using dry gel spinning method, the spinning solution is extruded from the spinneret into the air flow, the solvent evaporates to obtain dry gel precursor, and then high-power heat stretching is performed to obtain ultra-high molecular weight polyethylene antibacterial fiber;

[0034] A4. Spinning the ultra-high molecular weight polyethylene antibacterial fiber into yarn, and preparing the ultra-high molecular weight polyethylene antibacterial fabric through a weaving process.

[0035] Furthermore, in step A1, the solvent is at least one of decahydronaphthalene, paraffin oil, white oil, cyclohexane, and toluene.

[0036] Furthermore, in step A2, the antibacterial agent is at least one of a nano-silver antibacterial agent, a nano-zinc oxide antibacterial agent, and a nano-copper oxide antibacterial agent. Preferably, in order to improve the antibacterial properties of the fabric, the antibacterial agent of the present invention is compounded with a nano-silver antibacterial agent and a nano-zinc oxide antibacterial agent in a mass ratio of 1:1-3, and the added amount of the antibacterial agent is 0.1-1wt%.

[0037] Furthermore, the preparation method of the nano silver antibacterial agent comprises the following steps: dissolving urea in anhydrous ethanol and stirring evenly, adding butyl titanate thereto, adjusting the pH of the system to 3-4, continuing to stir evenly, then adding a silver nitrate aqueous solution thereto, continuing to stir until the solution system shows a Tyndall effect, stopping, coating the obtained transparent gel on a substrate and drying it, collecting and grinding to obtain the nano silver antibacterial agent.

[0038] Furthermore, the molar ratio of urea, butyl titanate and silver nitrate is 1:1:0.01-0.03 respectively.

[0039] In the present invention, the nano silver antibacterial agent has high antibacterial efficiency, excellent chemical stability, good biocompatibility and environmental friendliness, and is safe to use. Among them, nano silver has a broad-spectrum antibacterial property and can effectively fight against a variety of bacteria, fungi and viruses; by introducing titanium dioxide with photocatalytic properties and nano silver to play a synergistic antibacterial role, it can play an active sterilization and self-cleaning role under ultraviolet or visible light irradiation environment, provide long-term antibacterial protection for fabrics, inhibit bacterial growth and reduce odor generation.

[0040] Furthermore, the nano zinc oxide antibacterial agent is a modified nano zinc oxide coated by ethylene-vinyl acetate copolymer, and the specific preparation method is: dissolving ethylene-vinyl acetate copolymer in toluene to form a 10-15wt% uniform solution, then adding modified nano zinc oxide to it and stirring rapidly, and then dispersing by ultrasonic to obtain the nano zinc oxide antibacterial agent. Wherein, the mass ratio of the modified nano zinc oxide to the ethylene-vinyl acetate copolymer is 1:4-4.5.

[0041] Furthermore, the preparation method of the modified nano zinc oxide comprises the following steps:

[0042] B1. Dissolve zinc salt and citric acid in deionized water at a molar ratio of 1:1.5, heat and stir evenly, add ethylene glycol, adjust the pH of the system to neutral, continue stirring until uniform, dry in an oven at 90-95°C, grind, and calcine at a high temperature of 500-550°C to obtain nano zinc oxide powder;

[0043] B2. The nano zinc oxide powder obtained in step B1 is dispersed in anhydrous ethanol and stirred, and then ultrasonically dispersed to obtain a dispersion, to which 10-13wt% of an aluminum-titanium composite coupling agent is added and heated to 75-80°C and stirred for 30-50min, and then 12-16wt% of stearic acid is added and stirred for 30-60min, and finally the modified nano zinc oxide is obtained by centrifugation, washing and drying.

[0044] In the present invention, step B1 regulates and controls the nano zinc oxide particles to obtain nano zinc oxide particles with a particle size of 10-30nm to improve their antibacterial activity, and step B2 improves the agglomeration and poor stability of small-size nano zinc oxide particles by surface modification of the nano zinc oxide, and effectively improves the dispersibility of the zinc oxide particles in the system. Furthermore, the nano zinc oxide antibacterial agent is further uniformly coated on the surface of the modified zinc oxide particles by ethylene-vinyl acetate copolymer, and the binding force between the modified zinc oxide particles and ultra-high molecular weight polyethylene is significantly promoted by adding it to the spinning solution, so that it is uniformly dispersed in the polyethylene fiber. The nano zinc oxide antibacterial agent thus obtained has high antibacterial activity and high binding strength with the ultra-high molecular weight polyethylene fiber, so that the antibacterial fabric achieves the effect of long-lasting antibacterial and good water washability.

[0045] Furthermore, step A2 also includes adding plant pigments to the polymer solution for full dispersion before filtering. Specifically, the plant pigments are preferably pigments extracted from natural plants, such as hematoxylin (red) extracted from sappan wood, polyphenol pigments (mostly brownish yellow to reddish brown) extracted from pomegranate peel, berberine pigments (yellow) extracted from Phellodendron amurense, etc.

[0046] In the present invention, ultra-high molecular weight polyethylene fibers of different colors are directly prepared by adding plant pigments to the spinning solution, which solves the problems of difficult fiber coloring, complicated procedures and heavy pollution in the subsequent dyeing process. Furthermore, the plant pigment particles are added to the spinning solution for spinning. The plant pigment has natural antibacterial and antioxidant properties, which can effectively inhibit the growth of bacteria and microorganisms, thereby improving the hygienic properties of the fabric. Secondly, these pigments are usually environmentally friendly and renewable, which can reduce the dependence on synthetic dyes and help reduce environmental pollution. In addition, plant pigments can also provide soft natural tones for fabrics, improving the aesthetics and market appeal of the product. This innovative combination not only improves the functionality of the fabric, but also responds to the needs of sustainable development.

[0047] Furthermore, in step A4, the fineness of the ultra-high molecular weight polyethylene antibacterial fiber spun yarn ranges from 200 to 500D, and the antibacterial fabric is woven with a mountain-shaped weave structure. Specifically, the antibacterial fabric is woven with a warp mountain twill weave structure, and the weaving structure of the warp mountain twill weave usually has larger pores, allowing air to circulate more easily. This design helps to reduce the accumulation of heat and moisture, and improve the air permeability and comfort of the fabric. Preferably, the warp density of the antibacterial fabric is 130-140 strands / 10cm, the weft density is 100-110 strands / 10cm, and the surface density is 200-250g / m 2 , thickness is 0.4-0.6mm.

[0048] Example 1

[0049] This embodiment provides a method for preparing an ultra-high molecular weight polyethylene antibacterial fabric, comprising the following preparation steps:

[0050] A1. Dissolve ultra-high molecular weight polyethylene in a solvent under heating conditions at 150°C to form a uniform polymer solution;

[0051] A2, adding the antibacterial agent into the polymer solution, performing ultrasonic dispersion to uniformly disperse the polymer solution, and filtering and removing impurities to obtain a spinning solution;

[0052] A3, using dry gel spinning method, the spinning solution is extruded from the spinneret into the air flow, the solvent evaporates to obtain dry gel precursor, and then high-power heat stretching is performed to obtain ultra-high molecular weight polyethylene antibacterial fiber;

[0053] A4. Spinning the ultra-high molecular weight polyethylene antibacterial fiber into yarn, and preparing the ultra-high molecular weight polyethylene antibacterial fabric through a weaving process.

[0054] Furthermore, in step A1, the solvent is decalin.

[0055] Furthermore, in step A2, the antibacterial agent is a nano-silver antibacterial agent, and the amount of the antibacterial agent added is 0.7 wt %.

[0056] Furthermore, the preparation method of the nano silver antibacterial agent comprises the following steps: dissolving urea in anhydrous ethanol and stirring evenly, adding butyl titanate thereto, and adjusting the pH of the system to 3.5 with 5wt% dilute nitric acid, continuing to stir evenly, then adding a silver nitrate aqueous solution thereto, continuing to stir until the solution system shows a Tyndall effect, stopping, coating the obtained transparent gel on a substrate, drying it, and collecting and grinding it to obtain the nano silver antibacterial agent.

[0057] Furthermore, the molar ratios of urea, butyl titanate and silver nitrate are 1:1:0.02 respectively.

[0058] Further, in step A4, the fineness of the ultra-high molecular weight polyethylene antibacterial fiber spun yarn is 400D, the antibacterial fabric is woven with a mountain-shaped structure, the warp density of the antibacterial fabric is 135 strands / 10cm, the weft density is 105 strands / 10cm, and the surface density is 225g / m 2 , thickness is 0.5mm.

[0059] Example 2

[0060] This embodiment provides a method for preparing an ultra-high molecular weight polyethylene antibacterial fabric, comprising the following preparation steps:

[0061] A1. Dissolve ultra-high molecular weight polyethylene in a solvent under heating conditions at 150°C to form a uniform polymer solution;

[0062] A2, adding the antibacterial agent into the polymer solution, dispersing it evenly by ultrasonic or stirring, and filtering and removing impurities to obtain a spinning solution;

[0063] A3, using dry gel spinning method, the spinning solution is extruded from the spinneret into the air flow, the solvent evaporates to obtain dry gel precursor, and then high-power heat stretching is performed to obtain ultra-high molecular weight polyethylene antibacterial fiber;

[0064] A4. Spinning the ultra-high molecular weight polyethylene antibacterial fiber into yarn, and preparing the ultra-high molecular weight polyethylene antibacterial fabric through a weaving process.

[0065] Furthermore, in step A1, the solvent is decalin.

[0066] Furthermore, in step A2, the antibacterial agent is a nano zinc oxide antibacterial agent, and the amount of the antibacterial agent added is 1 wt %.

[0067] Furthermore, the nano zinc oxide antibacterial agent is a modified nano zinc oxide coated by ethylene-vinyl acetate copolymer, and the specific preparation method is: dissolving ethylene-vinyl acetate copolymer in toluene to form a 12wt% uniform solution, then adding modified nano zinc oxide to it and stirring rapidly, and then dispersing by ultrasonic to obtain the nano zinc oxide antibacterial agent. Wherein, the mass ratio of the modified nano zinc oxide to the ethylene-vinyl acetate copolymer is 1:4.2.

[0068] Furthermore, the preparation method of the modified nano zinc oxide comprises the following steps:

[0069] B1. Dissolve zinc acetate dihydrate and citric acid in deionized water at a molar ratio of 1:1.5, heat and stir evenly, add ethylene glycol, adjust the pH of the system to neutral, continue stirring until uniform, dry in an oven at 90°C, grind, and calcine at a high temperature of 500°C to obtain nano zinc oxide powder;

[0070] B2. The nano zinc oxide powder obtained in step B1 is dispersed in anhydrous ethanol and stirred, and then ultrasonically dispersed to obtain a dispersion, to which 12 wt % of an aluminum-titanium composite coupling agent is added and heated to 80° C. and stirred for 40 min, and then 14 wt % of stearic acid is added and stirred for 45 min. Finally, the modified nano zinc oxide is obtained by centrifugation, washing and drying.

[0071] Furthermore, the fineness of the ultra-high molecular weight polyethylene antibacterial fiber spun yarn is 400D, the antibacterial fabric is woven with a mountain-shaped structure, the warp density of the antibacterial fabric is 135 strands / 10cm, the weft density is 105 strands / 10cm, and the surface density is 225g / m 2 , thickness is 0.5mm.

[0072] Example 3

[0073] This embodiment provides a method for preparing an ultra-high molecular weight polyethylene antibacterial fabric, comprising the following preparation steps:

[0074] A1. Dissolve ultra-high molecular weight polyethylene in a solvent under heating conditions at 150°C to form a uniform polymer solution;

[0075] A2, adding the antibacterial agent into the polymer solution, dispersing it evenly by ultrasonic or stirring, and filtering and removing impurities to obtain a spinning solution;

[0076] A3, using dry gel spinning method, the spinning solution is extruded from the spinneret into the air flow, the solvent evaporates to obtain dry gel precursor, and then high-power heat stretching is performed to obtain ultra-high molecular weight polyethylene antibacterial fiber;

[0077] A4. Spinning the ultra-high molecular weight polyethylene antibacterial fiber into yarn, and preparing the ultra-high molecular weight polyethylene antibacterial fabric through a weaving process.

[0078] Furthermore, in step A1, the solvent is decalin.

[0079] Furthermore, in step A2, the antibacterial agent is compounded by a nano-silver antibacterial agent and a nano-zinc oxide antibacterial agent in a mass ratio of 1:3, and the total amount of the antibacterial agent added is 0.4wt%.

[0080] Furthermore, the preparation method of the nano silver antibacterial agent comprises the following steps: dissolving urea in anhydrous ethanol and stirring evenly, adding butyl titanate thereto, and adjusting the pH of the system to 3.5 with 5wt% dilute nitric acid, continuing to stir evenly, then adding a silver nitrate aqueous solution thereto, continuing to stir until the solution system shows a Tyndall effect, stopping, coating the obtained transparent gel on a substrate, drying it, and collecting and grinding it to obtain the nano silver antibacterial agent.

[0081] Furthermore, the molar ratios of urea, butyl titanate and silver nitrate are 1:1:0.02 respectively.

[0082] Furthermore, the nano zinc oxide antibacterial agent is a modified nano zinc oxide coated by ethylene-vinyl acetate copolymer, and the specific preparation method is: dissolving ethylene-vinyl acetate copolymer in toluene to form a 13wt% uniform solution, then adding modified nano zinc oxide to it and stirring rapidly, and then dispersing by ultrasonic to obtain the nano zinc oxide antibacterial agent. Wherein, the mass ratio of the modified nano zinc oxide to the ethylene-vinyl acetate copolymer is 1:4.

[0083] Furthermore, the preparation method of the modified nano zinc oxide comprises the following steps:

[0084] B1. Dissolve zinc salt and citric acid in deionized water at a molar ratio of 1:1.5, heat and stir evenly, add ethylene glycol, adjust the pH of the system to neutral, continue stirring until uniform, dry in an oven at 95°C, grind, and calcine at a high temperature of 550°C to obtain nano zinc oxide powder;

[0085] B2. The nano zinc oxide powder obtained in step B1 is dispersed in anhydrous ethanol and stirred, and then ultrasonically dispersed to obtain a dispersion, to which 12 wt % of an aluminum-titanium composite coupling agent is added and heated to 78° C. and stirred for 40 min, and then 15 wt % of stearic acid is added and stirred for 50 min. Finally, the modified nano zinc oxide is obtained by centrifugation, washing and drying.

[0086] Furthermore, step A2 also includes adding plant pigments to the polymer solution for full dispersion before filtering. The plant pigments are polyphenol pigments extracted from pomegranate peels, which are brownish yellow (Xi'an Huilin Biology).

[0087] Furthermore, the fineness of the ultra-high molecular weight polyethylene antibacterial fiber spun yarn is 400D, the antibacterial fabric is woven with a mountain-shaped structure, the warp density of the antibacterial fabric is 135 strands / 10cm, the weft density is 105 strands / 10cm, and the surface density is 225g / m 2 , thickness is 0.5mm.

[0088] Comparative Example 1

[0089] The difference between this comparative example and Example 1 is that a commercially available nano-silver antibacterial agent (Lanfeng additive, LFS-8801) is used to replace the nano-silver antibacterial agent in Example 1.

[0090] Comparative Example 2

[0091] The difference between this comparative example and Example 2 is that the preparation method of the antibacterial agent adopted in this comparative example is: zinc acetate dihydrate and citric acid are dissolved in deionized water at a molar ratio of 1:1.5, heated and stirred evenly, ethylene glycol is added thereto, and the pH of the system is adjusted to neutral, stirring is continued until uniform, and the mixture is dried in an oven at 90°C, then ground, and calcined at a high temperature of 500°C to obtain a nano zinc oxide antibacterial agent.

[0092] Comparative Example 3

[0093] The difference between this comparative example and Example 3 is that the antibacterial agent used in this comparative example is compounded by a commercially available nano silver antibacterial agent (Lanfeng additive, LFS-8801) and a nano zinc oxide antibacterial agent used in Comparative Example 2 in a mass ratio of 1:3.

[0094] Example 4

[0095] This example tests the performance of the antibacterial fabrics prepared in the above examples 1-3 and comparative examples 1-3:

[0096] (1) Antibacterial performance test: The antibacterial performance of antibacterial fabrics was evaluated by the inhibition zone method. First, Escherichia coli and Staphylococcus aureus were inoculated on nutrient agar medium and cultured for 24 hours to obtain uniform colonies. Then, a circular sample of antibacterial fabric with a diameter of 1 cm was cut and placed in the center of the culture medium inoculated with the bacterial species. After continuing to culture for 24 hours, the size of the inhibition zone was observed and measured. The size of the inhibition zone directly reflects the inhibitory effect of the antibacterial fabric on microorganisms. The larger the inhibition zone, the better the antibacterial effect. In order to ensure the accuracy and reliability of the data, at least 3 independent experiments were conducted for each bacterial species and statistical analysis was performed.

[0097] The antimicrobial properties of the fabrics were evaluated using standard test methods to determine their inhibitory effects on common bacteria. The results are shown in Table 1 below.

[0098] Table 1 Antibacterial rate of antibacterial fabrics against Escherichia coli and Staphylococcus aureus

[0099] Group Escherichia coli inhibition rate / % Staphylococcus aureus inhibition rate / % Example 1 96.71 97.32 Example 2 95.28 93.96 Example 3 99.98 99.90 Comparative Example 1 90.55 89.64 Comparative Example 2 87.96 86.27 Comparative Example 3 90.78 91.29

[0100] (2) Antibacterial durability test: According to the washing standard in standard FZ / T 73023-2006 "Antibacterial Textiles: Oscillation Method", the antibacterial sample to be tested is subjected to multiple standard washes to examine its antibacterial performance after multiple washes, i.e., antibacterial durability.

[0101] The experimental process is as follows: prepare a washing solution with a soap concentration of 0.2% and a temperature of 40°C, wash the sample to be washed under the condition of 10 steel balls for 45 minutes, take out the sample and wash it with deionized water for 1 minute, and repeat twice. Repeating the above operation once is equivalent to 5 washes. After completing the required number of washes, rinse the sample thoroughly with deionized water to prevent the residual detergent from affecting subsequent tests, and finally dry it for later use. After washing 10 times, 15 times, 20 times and 50 times, the changes in its antibacterial properties are measured, as shown in Table 2.

[0102] Table 2 Antibacterial fabric washing fastness (Example 3)

[0103] Washing times 0 10 15 20 50 Escherichia coli inhibition rate % 99.98 99.86 99.01 98.56 98.37 Staphylococcus aureus inhibition rate % 99.90 99.84 98.98 98.42 98.25

[0104] It can be seen from Table 1 that the antibacterial fabrics prepared in Examples 1-3 of the present invention have a high antibacterial rate against Escherichia coli and Staphylococcus aureus, especially after the nano-silver antibacterial agent and the nano-zinc oxide antibacterial agent are compounded for use in Example 3, the effect is more obvious, and the antibacterial rate against Escherichia coli and Staphylococcus aureus is greater than 99%, showing excellent antibacterial performance.

[0105] Furthermore, it can be seen from Table 2 that the antibacterial rate of the antibacterial fabric prepared in Example 3 is still maintained at more than 98% after 50 washings, which shows that the antibacterial rate of the antibacterial fabric is high and long-lasting. This is mainly because the antibacterial agent used in the present invention is firmly combined with the fiber, ensuring that the antibacterial agent will not be easily lost after repeated washing and can continue to play a role. This long-lasting and stable antibacterial effect not only provides users with a more hygienic and healthy use environment, but also prolongs the service life of the fabric and maintains its functionality and comfort. Furthermore, the amount of antibacterial agent added in the present invention is low, and will not have a negative impact on the mechanical properties of the ultra-high molecular weight polyethylene fiber.

[0106] The above specific embodiments are further explanations of the technical solutions and beneficial effects of the present invention, and are not limitations of the implementation methods. For those skilled in the art, any obvious replacements that do not depart from the concept of the present invention are within the protection scope of the present invention.

Claims

1. A method for preparing an ultra-high molecular weight polyethylene antibacterial fabric, characterized in that: The method comprises the following preparation steps: A1. Heat and dissolve ultra-high molecular weight polyethylene in a solvent to form a uniform polymer solution; A2, adding the antibacterial agent into the polymer solution, dispersing it evenly by ultrasonic or stirring, and filtering and removing impurities to obtain a spinning solution; A3, using dry gel spinning method, the spinning solution is extruded from the spinneret into the air flow, the solvent evaporates to obtain dry gel precursor, and then high-power heat stretching is performed to obtain ultra-high molecular weight polyethylene antibacterial fiber; A4. Spinning the ultra-high molecular weight polyethylene antibacterial fiber into yarn, and preparing the ultra-high molecular weight polyethylene antibacterial fabric through a weaving process.

2. The method for preparing an ultra-high molecular weight polyethylene antibacterial fabric according to claim 1, characterized in that: In step A1, the solvent is at least one of decahydronaphthalene, paraffin oil, white oil, cyclohexane, and toluene.

3. The method for preparing an ultra-high molecular weight polyethylene antibacterial fabric according to claim 1, characterized in that: In step A2, the antibacterial agent is at least one of a nano-silver antibacterial agent, a nano-zinc oxide antibacterial agent, and a nano-copper oxide antibacterial agent.

4. The method for preparing an ultra-high molecular weight polyethylene antibacterial fabric according to claim 3, characterized in that: The preparation method of the nano silver antibacterial agent comprises the following steps: dissolving urea in anhydrous ethanol and stirring evenly, adding butyl titanate thereto, adjusting the pH value of the system to 3-4, continuing to stir evenly, then adding a silver nitrate aqueous solution thereto, continuing to stir until the solution system shows a Tyndall effect, stopping, coating the obtained transparent gel on a substrate, drying it, collecting and grinding it to obtain the nano silver antibacterial agent.

5. The method for preparing an ultra-high molecular weight polyethylene antibacterial fabric according to claim 4, characterized in that: The molar ratio of urea, butyl titanate and silver nitrate is 1:1:0.01-0.03 respectively.

6. The method for preparing an ultra-high molecular weight polyethylene antibacterial fabric according to claim 3, characterized in that: The nano zinc oxide antibacterial agent is modified nano zinc oxide coated with ethylene-ethyl acetate copolymer.

7. The method for preparing an ultra-high molecular weight polyethylene antibacterial fabric according to claim 6, characterized in that: The preparation method of the modified nano zinc oxide comprises the following steps: B1. Dissolve zinc salt and citric acid in deionized water, heat and stir evenly, then add ethylene glycol, adjust the pH of the system to neutral, continue stirring until evenly distributed, dry in an oven, grind, and calcine at high temperature to obtain nano zinc oxide powder; B2. The nano zinc oxide powder obtained in step B1 is dispersed in anhydrous ethanol and stirred, and then ultrasonically dispersed to obtain a dispersion, to which an aluminum-titanium composite coupling agent is added and heated and stirred, and then stearic acid is added and stirred evenly, and finally the modified nano zinc oxide is obtained by centrifugation, washing and drying.

8. The method for preparing an ultra-high molecular weight polyethylene antibacterial fabric according to claim 1, characterized in that: Step A2 also includes adding the plant pigment into the polymer solution and fully dispersing it before filtering.

9. The method for preparing an ultra-high molecular weight polyethylene antibacterial fabric according to claim 1, characterized in that: In step A4, the antibacterial fabric is woven using a mountain-shaped weave structure.

10. An ultra-high molecular weight polyethylene antibacterial fabric, characterized in that: The method is prepared according to any one of claims 1 to 9.

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