Preparation method of disinfecting and antibacterial dust-free cloth

Abstract

The invention relates to a preparation method of disinfection antibacterial dust-free cloth, and belongs to the technical field of dust-free cloth preparation. The non-woven fabric is pretreated and soaked with deionized water to remove impurities and oil stains on the surface of the non-woven fabric, a clean surface is provided for follow-up treatment, then glutaraldehyde treatment is conducted, so that the disinfection performance of the base material is improved, and then the disinfected base material is soaked in the antibacterial agent. Finally, the antibacterial agent is rapidly cured through UV curing, so that the antibacterial effect of the dust-free cloth is further improved; chitosan is used for modifying cetyltrimethylammonium bromide (CTAB) in a formula of the antibacterial agent, and the modified CTAB has higher antibacterial activity and can generate a better synergistic effect with tetrapod-like zinc oxide whiskers and tebuconazole in the antibacterial agent, so that the overall antibacterial performance of the antibacterial agent is jointly improved.

Description

Technical Field

[0001] The invention belongs to the technical field of dust-free cloth preparation, and relates to a method for preparing a disinfected and antibacterial dust-free cloth. Background Art

[0002] In the field of dust-free cloth preparation technology, with the continuous advancement of science and technology and people's increasing requirements for cleaning and disinfection, the development of dust-free cloth with disinfection and antibacterial functions has become an important market demand. Traditional dust-free cloths mainly focus on removing dust and particles, but have obvious deficiencies in disinfection and antibacterial properties. Especially in the fields of medical care, hygiene, precision manufacturing, etc., higher requirements are placed on the disinfection and antibacterial properties of dust-free cloths.

[0003] Therefore, it is an urgent problem to develop a disinfectant and antibacterial dust-free cloth with a simple preparation process, significant and lasting disinfection and antibacterial effect, and harmless to the human body and the environment. It is based on this background that the present invention aims to provide a new method for preparing a disinfectant and antibacterial dust-free cloth. By precisely controlling each step of chemical treatment and physical processing, the disinfection and antibacterial properties of the dust-free cloth are improved, ensuring the safety of the product and the sustainability of the environment. The method pays special attention to the use of environmentally friendly materials and processes in the preparation process, as well as improving the effect and stability of the antibacterial agent by optimizing the formula and process parameters. Through these innovations, the present invention provides a disinfectant and antibacterial dust-free cloth with superior performance, safety and reliability to meet the needs of modern industry for high standards of cleaning and hygiene. Summary of the invention

[0004] The purpose of the present invention is to provide a method for preparing a disinfecting and antibacterial dust-free cloth, which has the characteristics of good antibacterial effect.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] A method for preparing a disinfectant and antibacterial dust-free cloth, the specific preparation process of the disinfectant and antibacterial dust-free cloth is as follows:

[0007] S1: A non-woven fabric is selected as the substrate, and the substrate is immersed in deionized water at 60°C for 1 hour. After being taken out, it is dried by hot air to obtain a dry substrate A;

[0008] S2: dissolving glutaraldehyde in deionized water to prepare a glutaraldehyde solution with a mass fraction of 2-5%, immersing substrate A in the glutaraldehyde solution, heating to 50° C., ultrasonicating for 1-2 hours, and drying to obtain substrate B;

[0009] S3: immersing substrate B in an antibacterial agent and ultrasonically immersing it for 8 to 12 hours, taking it out after the immersion is completed, laying it flat, and drying it with hot air to obtain substrate C;

[0010] The formula of the antibacterial agent is, by mass percentage, 30-50% of tebuconazole, 2-3% of tetrapod-shaped zinc oxide whiskers, 1-2% of rare earth oxides, 5-10% of modified hexadecyltrimethylammonium bromide CTAB, 5-10% of silane coupling agent, and 40-55% of deionized water.

[0011] The preparation method of modified hexadecyltrimethylammonium bromide is as follows,

[0012] Disperse CTAB in deionized water to obtain a CTAB solution with a mass fraction of 5%, disperse chitosan in deionized water to obtain a chitosan solution with a mass fraction of 5-10%, slowly drop the chitosan solution into the CTAB solution, the volume ratio of the two being 1:1, stir at a speed of 150r / min while dropping, continue stirring after the dropwise addition is completed, slowly heat up to 40°C at 2°C / min, react at a constant temperature of 40°C for 2h, then slowly cool to room temperature, filter after crystals are precipitated, and dry at 80°C for 12h to obtain modified hexadecyltrimethylammonium bromide;

[0013] The preparation method of the antibacterial agent is as follows,

[0014] S3.1: Tetrapod-shaped zinc oxide whiskers, rare earth oxides and modified hexadecyltrimethylammonium bromide are mixed according to the formula ratio, and the mixture is put into a ball mill for grinding at a speed of 800 r / min for 2 h to obtain a mixture I;

[0015] S3.2: adding tebuconazole to deionized water, stirring at a speed of 120 r / min, raising the temperature to 40° C. while stirring, stirring at a constant temperature until tebuconazole is completely dissolved, then adding mixture I and a silane coupling agent, and increasing the speed to 200 r / min, stirring for 6 hours, to obtain the antibacterial agent;

[0016] S4: Perform UV curing treatment on substrate C to obtain substrate D after the treatment is completed. Rinse substrate D in deionized water for 10 to 15 minutes, take out after rinsing, blow dry under a nitrogen atmosphere at 70° C., and complete the preparation of the disinfectant and antibacterial dust-free cloth.

[0017] Furthermore, the parameters of the hot air drying process in S1 are a drying temperature of 80° C. and a drying time of 1 to 2 hours.

[0018] Furthermore, the parameters of the hot air drying process in S3 are a drying temperature of 70° C. and a drying time of 1 to 2 hours.

[0019] Furthermore, the rare earth oxide in S3 is one of cerium oxide and lanthanum oxide.

[0020] Furthermore, the silane coupling agent in S3 is one of silane coupling agent KH-560 and silane coupling agent KH-550.

[0021] Furthermore, the chitosan solution in S3 is slowly added dropwise into the CTAB solution at a rate of 2 s / drop.

[0022] Furthermore, the rate of slowly cooling from 40° C. to room temperature in S3 is 1° C. / min.

[0023] Furthermore, the particle size of the mixture I obtained by grinding in S3.1 is 1000 mesh.

[0024] Furthermore, the parameters of the UV curing in S4 are ultraviolet wavelength of 355 to 365 nm and curing time of 5 to 7 seconds.

[0025] Furthermore, the purge flow rate of nitrogen in S4 is 20 m / s.

[0026] The present invention first pre-treats the non-woven fabric. Soaking in deionized water can remove impurities and oil stains on the surface of the non-woven fabric, providing a clean surface for subsequent processing. Hot air drying can quickly evaporate water to prevent residual water from causing incomplete subsequent chemical reactions. Glutaraldehyde is a broad-spectrum disinfectant that can effectively kill a variety of microorganisms and improve the disinfection performance of dust-free cloths. The cavitation effect generated by ultrasound can destroy the cell walls of microorganisms and enhance the bactericidal effect of the disinfectant. The substrate after disinfection is then immersed in an antibacterial agent. The various components in the antibacterial agent of the present invention work together to provide a lasting antibacterial effect. The antibacterial agent is then quickly cured by UV curing to improve the durability and antibacterial effect of the dust-free cloth. Nitrogen purge drying can quickly remove moisture and prevent bacterial growth. At the same time, nitrogen protection can avoid oxidation.

[0027] Tebuconazole is a broad-spectrum fungicide with significant inhibitory and killing effects on a variety of bacteria and fungi. It achieves the antibacterial purpose by interfering with the cell wall synthesis or cell membrane function of pathogens. As the main active ingredient in the formula, the high content of tebuconazole ensures that the antibacterial agent has a strong bactericidal ability; tetrapod-shaped zinc oxide whiskers have excellent antibacterial properties and photocatalytic activity, and can produce free radicals under light to further kill bacteria. The tetrapod-shaped zinc oxide whiskers release zinc ions and free radicals to destroy the cell structure of bacteria to achieve an antibacterial effect, and can act synergistically with tebuconazole. When the tetrapod-shaped zinc oxide whiskers are compounded with tebuconazole, the two can complement each other and jointly improve the bactericidal ability of the antibacterial agent. The tetrapod-shaped zinc oxide whiskers destroy the bacterial cell membrane by releasing zinc ions and photocatalysis, while tebuconazole kills the bacteria by inhibiting the formation of the bacterial cell membrane. This synergistic effect not only enhances the broad-spectrum bactericidal ability of the antimicrobial agent, but also improves its bactericidal efficiency and durability. Rare earth oxides have excellent catalytic properties and stability, which can enhance the effects of other antimicrobial ingredients. Through catalysis, they accelerate the reaction rate of active ingredients in antimicrobial agents and improve bactericidal efficiency. As an auxiliary ingredient, rare earth oxides can enhance the stability and reactivity of the entire antimicrobial system. The modified CTAB has better dispersibility and stability, which can enhance the adhesion and durability of the antimicrobial agent on the dust-free cloth. Through the action of cationic surfactants, it destroys the cell membrane of bacteria to achieve bactericidal results. effect, and as a surfactant, modified CTAB can ensure that the antibacterial agent is evenly distributed on the dust-free cloth, thereby improving the durability of the antibacterial effect; the silane coupling agent can improve the compatibility between the inorganic antibacterial agent and the dust-free cloth, improve the adhesion and durability of the antibacterial agent, and firmly fix the inorganic antibacterial agent on the dust-free cloth substrate through chemical bonding. As a bridge, the silane coupling agent can ensure a close bond between the antibacterial agent and the dust-free cloth, thereby improving the durability and stability of the antibacterial effect; deionized water can ensure the uniform distribution of the antibacterial agent on the dust-free cloth, thereby improving the uniformity and consistency of the antibacterial effect.

[0028] In the formulation of the antimicrobial agent, hexadecyltrimethylammonium bromide (CTAB) is modified. The modified CTAB has stronger antimicrobial activity and can produce better synergistic effects with tetrapod-shaped zinc oxide whiskers and tebuconazole in the antimicrobial agent, thereby jointly improving the overall antimicrobial performance of the antimicrobial agent. The dispersibility of CTAB in the antimicrobial agent is improved by reacting CTAB with chitosan. As a polymer compound, chitosan has good dispersibility and stability. By reacting with CTAB, chitosan is wrapped around the CTAB molecules to form a protective layer to prevent agglomeration and precipitation between CTAB molecules. At the same time, this modification may also improve the stability of CTAB in the antimicrobial agent, so that it maintains effective antimicrobial activity for a long time. The modified CTAB also has better affinity, more active groups and reaction sites, and can more effectively produce stronger chemical bonding and physical adsorption with other components in the antimicrobial agent and the substrate, thereby improving the adhesion and durability of the antimicrobial agent on the substrate.

[0029] Beneficial effects of the present invention:

[0030] (1) The present invention first pre-treats the non-woven fabric, soaks it in deionized water to remove impurities and oil stains on the surface of the non-woven fabric, and provides a clean surface for subsequent treatment. The non-woven fabric is then treated with glutaraldehyde to improve the disinfection performance of the substrate. The substrate after disinfection is then immersed in an antibacterial agent. The various components in the antibacterial agent of the present invention work together to provide a long-lasting antibacterial effect. Finally, the antibacterial agent is quickly cured by UV curing to further improve the antibacterial effect of the dust-free cloth.

[0031] (2) The present invention uses chitosan to modify cetyltrimethylammonium bromide (CTAB) in the antibacterial agent formula. The modified CTAB has stronger antibacterial activity and can produce better synergistic effects with tetrapod-shaped zinc oxide whiskers and tebuconazole in the antibacterial agent, thereby jointly improving the overall antibacterial performance of the antibacterial agent. DETAILED DESCRIPTION

[0032] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation methods, structures, features and effects of the present invention are described in detail below in combination with the embodiments.

[0033] Example 1

[0034] A method for preparing a disinfectant and antibacterial dust-free cloth, the specific preparation process of the disinfectant and antibacterial dust-free cloth is as follows:

[0035] S1: A non-woven fabric is selected as a substrate, and the substrate is immersed in deionized water at 60°C for 1 hour. After being taken out, the substrate is subjected to hot air drying treatment. The parameters of the hot air drying treatment are a drying temperature of 80°C and a drying time of 1 to 2 hours to obtain a dry substrate A;

[0036] S2: dissolving glutaraldehyde in deionized water to prepare a glutaraldehyde solution with a mass fraction of 5%, immersing substrate A in the glutaraldehyde solution, heating to 50° C., ultrasonicating for 2 h, and drying to obtain substrate B;

[0037] S3: Substrate B is immersed in an antibacterial agent and ultrasonically immersed for 12 hours. After the immersion is completed, the substrate is taken out, laid flat, and dried using hot air. The parameters of the hot air drying treatment are a drying temperature of 70° C. and a drying time of 2 hours to obtain substrate C.

[0038] The formula of the antibacterial agent is, by mass percentage, 40% of tebuconazole, 3% of tetrapod-shaped zinc oxide whisker, 2% of cerium oxide, 10% of modified hexadecyltrimethylammonium bromide CTAB, 5% of silane coupling agent KH-550, and 40% of deionized water.

[0039] The preparation method of modified hexadecyltrimethylammonium bromide is as follows,

[0040] CTAB was dispersed in deionized water to obtain a CTAB solution with a mass fraction of 5%, chitosan was dispersed in deionized water to obtain a chitosan solution with a mass fraction of 7%, the chitosan solution was slowly added to the CTAB solution at a rate of 2s / drop, the volume ratio of the two was 1:1, and the solution was stirred at a speed of 150r / min while dropping. After the dropwise addition was completed, the solution was continuously stirred and the temperature was slowly raised to 40°C at a rate of 2°C / min, and the solution was kept at a constant temperature for 2h at 40°C, and then the temperature was slowly lowered to room temperature at a rate of 1°C / min, and the crystals were filtered after precipitation, and dried at 80°C for 12h to obtain modified hexadecyltrimethylammonium bromide;

[0041] The preparation method of the antibacterial agent is as follows,

[0042] S3.1: Tetrapod-shaped zinc oxide whiskers, rare earth oxides and modified hexadecyltrimethylammonium bromide are mixed according to the formula ratio, and the mixture is put into a ball mill for grinding. The speed of the ball mill is 800 r / min, and the grinding time is 2 h to obtain a mixture I. The particle size of the mixture I is 1000 mesh;

[0043] S3.2: adding tebuconazole to deionized water, stirring at a speed of 120 r / min, raising the temperature to 40° C. while stirring, stirring at a constant temperature until tebuconazole is completely dissolved, then adding mixture I and a silane coupling agent, and increasing the speed to 200 r / min, stirring for 6 hours, to obtain the antibacterial agent;

[0044] S4: Perform UV curing treatment on substrate C, the UV curing parameters are ultraviolet wavelength of 365nm, curing time of 5s, and obtain substrate D after the treatment. Rinse substrate D in deionized water for 10min, take out after rinsing, blow dry in nitrogen atmosphere at 70°C, and the blowing flow rate of nitrogen is 20m / s, thereby completing the preparation of the disinfection and antibacterial dust-free cloth.

[0045] Example 2

[0046] A method for preparing a disinfectant and antibacterial dust-free cloth, the specific preparation process of the disinfectant and antibacterial dust-free cloth is as follows:

[0047] S1: A non-woven fabric is selected as the substrate, and the substrate is immersed in deionized water at 60°C for 1 hour. After being taken out, the substrate is subjected to hot air drying treatment. The parameters of the hot air drying treatment are a drying temperature of 80°C and a drying time of 1 hour to obtain a dry substrate A;

[0048] S2: dissolving glutaraldehyde in deionized water to prepare a glutaraldehyde solution with a mass fraction of 2%, immersing substrate A in the glutaraldehyde solution, heating to 50° C., ultrasonicating for 1 h, and drying to obtain substrate B;

[0049] S3: immersing substrate B in an antibacterial agent and ultrasonically immersing it for 12 hours, taking it out after the immersion is completed, laying it flat, and drying it with hot air. The parameters of the hot air drying treatment are a drying temperature of 70° C. and a drying time of 1 hour, to obtain substrate C;

[0050] The formula of the antibacterial agent is, by mass percentage, 37% of tebuconazole, 2% of tetrapod-shaped zinc oxide whisker, 1% of lanthanum oxide, 5% of modified hexadecyltrimethylammonium bromide CTAB, 5% of silane coupling agent KH-560, and 50% of deionized water.

[0051] The preparation method of modified hexadecyltrimethylammonium bromide is as follows,

[0052] Disperse CTAB in deionized water to obtain a CTAB solution with a mass fraction of 5%, disperse chitosan in deionized water to obtain a chitosan solution with a mass fraction of 5%, slowly drop the chitosan solution into the CTAB solution at a rate of 2s / drop, the volume ratio of the two is 1:1, stir at a speed of 150r / min while dropping, continue stirring after the dropwise addition is completed, slowly heat to 40°C at a rate of 2°C / min, react at a constant temperature at 40°C for 2h, then slowly cool to room temperature at a rate of 1°C / min, filter after crystals are precipitated, and dry at 80°C for 12h to obtain modified hexadecyltrimethylammonium bromide;

[0053] The preparation method of the antibacterial agent is as follows,

[0054] S3.1: Tetrapod-shaped zinc oxide whiskers, rare earth oxides and modified hexadecyltrimethylammonium bromide are mixed according to the formula ratio, and the mixture is put into a ball mill for grinding. The speed of the ball mill is 800 r / min, and the grinding time is 2 h to obtain a mixture I. The particle size of the mixture I is 1000 mesh;

[0055] S3.2: adding tebuconazole to deionized water, stirring at a speed of 120 r / min, raising the temperature to 40° C. while stirring, stirring at a constant temperature until tebuconazole is completely dissolved, then adding mixture I and a silane coupling agent, and increasing the speed to 200 r / min, stirring for 6 hours, to obtain the antibacterial agent;

[0056] S4: Perform UV curing treatment on substrate C, the UV curing parameters are ultraviolet wavelength of 355nm, curing time of 7s, and obtain substrate D after the treatment. Rinse substrate D in deionized water for 15min, take out after rinsing, blow dry in nitrogen atmosphere at 70°C, and the blowing flow rate of nitrogen is 20m / s, thereby completing the preparation of the disinfection and antibacterial dust-free cloth.

[0057] Example 3

[0058] A method for preparing a disinfectant and antibacterial dust-free cloth, the specific preparation process of the disinfectant and antibacterial dust-free cloth is as follows:

[0059] S1: A non-woven fabric is selected as the substrate, and the substrate is immersed in deionized water at 60°C for 1 hour. After being taken out, the substrate is subjected to hot air drying treatment. The parameters of the hot air drying treatment are a drying temperature of 80°C and a drying time of 2 hours to obtain a dry substrate A;

[0060] S2: dissolving glutaraldehyde in deionized water to prepare a glutaraldehyde solution with a mass fraction of 5%, immersing substrate A in the glutaraldehyde solution, heating to 50° C., ultrasonicating for 1 h, and drying to obtain substrate B;

[0061] S3: immersing substrate B in an antibacterial agent and ultrasonically immersing it for 8 hours, taking it out after the immersion is completed, laying it flat, and drying it with hot air. The parameters of the hot air drying treatment are a drying temperature of 70° C. and a drying time of 1 hour, to obtain substrate C;

[0062] The formula of the antibacterial agent is, by mass percentage, 30% of tebuconazole, 3% of tetrapod-shaped zinc oxide whisker, 2% of cerium oxide, 5% of modified hexadecyltrimethylammonium bromide CTAB, 5% of silane coupling agent KH-560, and 55% of deionized water.

[0063] The preparation method of modified hexadecyltrimethylammonium bromide is as follows,

[0064] CTAB was dispersed in deionized water to obtain a CTAB solution with a mass fraction of 5%, chitosan was dispersed in deionized water to obtain a chitosan solution with a mass fraction of 10%, the chitosan solution was slowly added to the CTAB solution at a rate of 2s / drop, the volume ratio of the two was 1:1, and the solution was stirred at a speed of 150r / min while dropping. After the dropwise addition was completed, the solution was continuously stirred and the temperature was slowly raised to 40°C at a rate of 2°C / min, and the solution was kept at a constant temperature for 2h at 40°C, and then the temperature was slowly lowered to room temperature at a rate of 1°C / min, and the crystals were filtered after precipitation, and dried at 80°C for 12h to obtain modified hexadecyltrimethylammonium bromide;

[0065] The preparation method of the antibacterial agent is as follows,

[0066] S3.1: Tetrapod-shaped zinc oxide whiskers, rare earth oxides and modified hexadecyltrimethylammonium bromide are mixed according to the formula ratio, and the mixture is put into a ball mill for grinding. The speed of the ball mill is 800 r / min, and the grinding time is 2 h to obtain a mixture I. The particle size of the mixture I is 1000 mesh;

[0067] S3.2: adding tebuconazole to deionized water, stirring at a speed of 120 r / min, raising the temperature to 40° C. while stirring, stirring at a constant temperature until tebuconazole is completely dissolved, then adding mixture I and a silane coupling agent, and increasing the speed to 200 r / min, stirring for 6 hours, to obtain the antibacterial agent;

[0068] S4: Perform UV curing treatment on substrate C, the UV curing parameters are ultraviolet wavelength of 365nm, curing time of 5s, and obtain substrate D after the treatment. Rinse substrate D in deionized water for 15min, take out after rinsing, blow dry in nitrogen atmosphere at 70°C, and the blowing flow rate of nitrogen is 20m / s, thereby completing the preparation of the disinfection and antibacterial dust-free cloth.

[0069] Comparative Example 1

[0070] In the antibacterial agent of this comparative example, chitosan is not used to modify CTAB, and the remaining steps are consistent with those of Example 1.

[0071] Comparative Example 2

[0072] No tetrapod-shaped zinc oxide whiskers were added to the antibacterial agent of this comparative example, and the remaining steps were consistent with those of Example 1.

[0073] Comparative Example 3

[0074] No rare earth oxide is added to the antibacterial agent of this comparative example, and the remaining steps are consistent with those of Example 1.

[0075] Comparative Example 4

[0076] In this comparative example, step S2 is not performed, and the remaining steps are consistent with those in Example 1.

[0077] Comparative Example 5

[0078] In this comparative example, UV curing treatment is not performed, and the remaining steps are consistent with those in Example 1.

[0079] The performance of the embodiments and comparative examples was tested, and the antibacterial rate (%) was tested with reference to GB / T 20944.3-2008 as the standard. The experimental results are summarized in the following table:

[0080]

[0081] From the above data, it can be seen that the modification of CTAB and the four-needle zinc oxide whiskers significantly improved the antibacterial rate of the dust-free cloth. The addition of rare earth oxides also improved the antibacterial rate of the dust-free cloth to a certain extent. The glutaraldehyde treatment and UV curing treatment in the preparation process also improved the antibacterial rate of the dust-free cloth.

[0082] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A method for preparing a disinfected and antibacterial dust-free cloth, characterized in that: The specific preparation process of the disinfection and antibacterial dust-free cloth is as follows: S1: A non-woven fabric is selected as the substrate, and the substrate is immersed in deionized water at 60°C for 1 hour. After being taken out, it is dried by hot air to obtain a dry substrate A; S2: dissolving glutaraldehyde in deionized water to prepare a glutaraldehyde solution with a mass fraction of 2-5%, immersing substrate A in the glutaraldehyde solution, heating to 50° C., ultrasonicating for 1-2 hours, and drying to obtain substrate B; S3: immersing substrate B in an antibacterial agent and ultrasonically immersing it for 8 to 12 hours, taking it out after the immersion is completed, laying it flat, and drying it with hot air to obtain substrate C; The formula of the antibacterial agent is, by mass percentage, 30-50% of tebuconazole, 2-3% of tetrapod-shaped zinc oxide whiskers, 1-2% of rare earth oxides, 5-10% of modified hexadecyltrimethylammonium bromide CTAB, 5-10% of silane coupling agent, and 40-55% of deionized water. The preparation method of modified hexadecyltrimethylammonium bromide is as follows, Disperse CTAB in deionized water to obtain a CTAB solution with a mass fraction of 5%, disperse chitosan in deionized water to obtain a chitosan solution with a mass fraction of 5-10%, slowly drop the chitosan solution into the CTAB solution, the volume ratio of the two being 1:1, stir at a speed of 150r / min while dropping, continue stirring after the dropwise addition is completed, slowly heat up to 40°C at 2°C / min, react at a constant temperature of 40°C for 2h, then slowly cool to room temperature, filter after crystals are precipitated, and dry at 80°C for 12h to obtain modified hexadecyltrimethylammonium bromide; The preparation method of the antibacterial agent is as follows, S3.1: Tetrapod-shaped zinc oxide whiskers, rare earth oxides and modified hexadecyltrimethylammonium bromide are mixed according to the formula ratio, and the mixture is put into a ball mill for grinding at a speed of 800 r / min for 2 h to obtain a mixture I; S3.2: adding tebuconazole to deionized water, stirring at a speed of 120 r / min, raising the temperature to 40° C. while stirring, stirring at a constant temperature until tebuconazole is completely dissolved, then adding mixture I and a silane coupling agent, and increasing the speed to 200 r / min, stirring for 6 hours, to obtain the antibacterial agent; S4: Perform UV curing treatment on substrate C to obtain substrate D after the treatment is completed. Rinse substrate D in deionized water for 10 to 15 minutes, take out after rinsing, blow dry under a nitrogen atmosphere at 70° C., and complete the preparation of the disinfectant and antibacterial dust-free cloth.

2. The method for preparing a disinfectant and antibacterial dust-free cloth according to claim 1, characterized in that: The parameters of the hot air drying process in S1 are a drying temperature of 80° C. and a drying time of 1 to 2 hours.

3. The method for preparing a disinfectant and antibacterial dust-free cloth according to claim 1, characterized in that: The parameters of the hot air drying process in S3 are a drying temperature of 70° C. and a drying time of 1 to 2 hours.

4. The method for preparing a disinfected and antibacterial dust-free cloth according to claim 1, characterized in that: The rare earth oxide in S3 is one of cerium oxide and lanthanum oxide.

5. The method for preparing a disinfectant and antibacterial dust-free cloth according to claim 1, characterized in that: The silane coupling agent in S3 is one of silane coupling agent KH-560 and silane coupling agent KH-550.

6. The method for preparing a disinfectant and antibacterial dust-free cloth according to claim 1, characterized in that: The chitosan solution in S3 is slowly added dropwise into the CTAB solution at a rate of 2 s / drop.

7. The method for preparing a disinfectant and antibacterial dust-free cloth according to claim 1, characterized in that: The rate of slowly cooling from 40°C to room temperature in S3 is 1°C / min.

8. The method for preparing a disinfecting and antibacterial dust-free cloth according to claim 1, characterized in that: The particle size of the mixture I obtained by grinding in S3.1 is 1000 mesh.

9. The method for preparing a disinfected and antibacterial dust-free cloth according to claim 1, characterized in that: The parameters of the UV curing in S4 are that the ultraviolet wavelength is 355 to 365 nm and the curing time is 5 to 7 seconds.

10. The method for preparing a disinfected and antibacterial dust-free cloth according to claim 1, characterized in that: The purge flow rate of nitrogen in S4 is 20 m / s.

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