Multi-effect-in-one antibacterial mildew-proof formaldehyde-removing odor-removing auxiliary agent as well as preparation method and application thereof

Abstract

The invention provides a multiple-effect-in-one antibacterial, mildew-proof, formaldehyde-removing and odor-removing auxiliary agent as well as a preparation method and application thereof. The auxiliary agent comprises 10-20 parts of modified nano titanium dioxide, 5-15 parts of a nano silver ion antibacterial agent, 3-8 parts of a natural plant extracted formaldehyde-removing agent, 2-5 parts of a mildew-proof agent, 22-28 parts of modified activated carbon, 5-8 parts of a surfactant and 30-50 parts of deionized water. Wherein the modified nano titanium dioxide is obtained through specific dispersion, surface modification and heat treatment processes; the modified activated carbon is formed by activating high-temperature water vapor. The natural plant extracted formaldehyde cleaning agent is composed of chlorophytum comosum, eucalyptus leaf extract and mustard extract according to a specific ratio, and the mildew preventive contains zinc sulfate, chitosan and lysozyme. The preparation method comprises multi-step material mixing and treatment operation. Through the synergistic effect of all the components, the additive has multiple effects of resisting bacteria, preventing mildew, removing formaldehyde, removing odor, resisting viruses and the like, is applied to the field of indoor household products, and meets the requirements of improving the environment and guaranteeing the product quality.

Description

Technical Field

[0001] The invention relates to the field of home improvement care, and in particular to a multi-effect all-in-one antibacterial, mildew-proof, formaldehyde-removing and odor-removing auxiliary agent, and a preparation method and application thereof. Background Art

[0002] In modern life, people spend most of their time indoors, and the quality and performance of indoor home furnishing products, as objects that are in close contact with people, directly affect people's quality of life and health. Home furnishing products such as furniture panels, sofa fabrics, curtain fabrics and carpets, while adding comfort and beauty to life, also face many environmental health challenges.

[0003] At present, although there are some antibacterial, anti-mildew or odor-removing products on the market, their functions are often relatively simple and it is difficult to meet people's various needs for indoor air quality. Some antibacterial agents can only effectively kill bacteria, but cannot remove harmful gases such as formaldehyde; for the anti-mildew function, the existing anti-mildew treatment mostly uses chemical anti-mildew agents. Although these anti-mildew agents can inhibit the growth of mold in the short term, they often have environmental risks and may release harmful chemicals, which endangers human health. At the same time, their anti-mildew long-term effectiveness needs to be improved and is prone to failure in humid environments; in terms of formaldehyde removal technology, some formaldehyde removal products have low formaldehyde removal efficiency and can only adsorb but not effectively decompose formaldehyde, resulting in formaldehyde being released again after adsorption saturation, and the effect of continuous air purification cannot be achieved. It is difficult to truly reduce the long-term formaldehyde content in the room and ensure air quality. In addition, the existing various functional additives often have single functions, and multiple products need to be used to deal with different problems separately, which not only increases the cost and operational complexity, but also may affect the overall use effect due to compatibility issues between different products. Summary of the invention

[0004] In view of this, the present invention proposes a multi-effect antibacterial, anti-mildew, formaldehyde-removing and odor-removing auxiliary agent and a preparation method and application thereof to solve the above problems.

[0005] The technical solution of the present invention is achieved as follows: a multi-effect all-in-one antibacterial, anti-mildew, formaldehyde-removing and odor-removing auxiliary agent comprises the following raw materials in parts by weight: 10-20 parts of modified nano titanium dioxide, 5-15 parts of nano silver ion antibacterial agent, 3-8 parts of natural plant extract formaldehyde-removing agent, 2-5 parts of mildew-proof agent, 22-28 parts of modified activated carbon, 5-8 parts of surfactant, and 30-50 parts of deionized water; the natural plant extract formaldehyde-removing agent is a spider plant extract, a eucalyptus leaf extract and a mustard extract in a mass ratio of (3-8):(12-15):(6-10), and the mildew-proof agent is zinc sulfate, chitosan and lysozyme in a mass ratio of (5-8):(2-5):(1-3), and the enzyme activity is greater than 2000U / mL.

[0006] Preferably, the spider plant extract is prepared by collecting the whole plant of spider plant, including leaves and stems, adding the whole plant to an ethanol solution with a mass concentration of 70% at a solid-liquid ratio of 1:5-10 and soaking the solution for 2 hours. The soaked spider plant is ultrasonically treated for 30 minutes using a 120W, 40kHz ultrasonic cleaner, and the mixed solution after ultrasonic treatment is centrifuged at 5000rpm for 5 minutes. The ethanol is evaporated and removed at 75°C, and the spider plant extract is obtained by filtration.

[0007] Preferably, the eucalyptus leaf extract is prepared by carefully washing the collected eucalyptus leaves with running water to remove dust, dirt and impurities attached to the surface, and then quickly washing them with distilled water, drying and crushing them, with the size of the fragments controlled to be 0.5-2 cm, adding distilled water at a solid-liquid ratio of 1:8, adjusting the temperature to 100° C. by steam distillation, and extracting for 0.5-1 hour under standard atmospheric pressure.

[0008] Preferably, the mustard extract is made from mustard seeds rich in active ingredients, which are cleaned, dried, and crushed, and extracted using supercritical CO2 with a critical temperature of 31.1°C and a critical pressure of 7.38MPa. The temperature during extraction is set at 35-60°C, the pressure is set at 15-40MPa, the extraction time is 1-3 hours, and the mustard extract is separated and collected.

[0009] Furthermore, a multi-effect antibacterial, anti-mildew, formaldehyde-removing and odor-removing auxiliary agent includes the following raw materials in parts by weight: 15 parts of modified nano titanium dioxide, 10 parts of nano silver ion antibacterial agent, 5 parts of natural plant extract formaldehyde-removing agent, 3 parts of mildew inhibitor, 25 parts of modified activated carbon, 7 parts of surfactant, and 40 parts of deionized water.

[0010] Furthermore, a multi-effect antibacterial, anti-mildew, formaldehyde-removing and odor-removing auxiliary agent is provided, wherein the modified nano titanium dioxide is prepared by dispersing nano titanium dioxide particles in an ethanol solution with a mass concentration of 35-50%, dispersing the particles using an ultrasonic disperser or a high-speed stirrer, adding a photosensitive coupling agent with a mass concentration of 2.5-5.5% of the particles for surface modification, and then heat-treating the particles to remove the solvent and solidify the modified layer to obtain modified nano titanium dioxide with a particle size range of 1-10 nm; the mass volume ratio of the nano titanium dioxide particles to the ethanol solution is 8-15:80-100 g / mL.

[0011] Furthermore, the ultrasonic frequency of the ultrasonic disperser is 20-25kHz, the ultrasonic power is 150-300W, the ultrasonic time is 40-60min, the stirring rate of the high-speed stirrer is 500-1500rpm, and the stirring time is 1-1.5h.

[0012] Furthermore, the photosensitive coupling agent is selected from any one of KH-570 silane coupling agent, vinyl trimethoxysilane, and vinyl tri-tert-butyl peroxysilane.

[0013] Furthermore, the modified activated carbon is obtained by activating the activated carbon raw material with water vapor at 700-1000°C, and the specific surface area thereof is greater than 1500m 2 / g, pore volume greater than 0.8cm 3 / g, and a modified activated carbon with a pore size less than 2nm was obtained.

[0014] Furthermore, the surfactant is a non-ionic surfactant, specifically one or more of fatty alcohol polyoxyethylene ether and alkylphenol polyoxyethylene ether.

[0015] Furthermore, a method for preparing a multi-effect antibacterial, anti-mildew, formaldehyde-removing and odor-removing auxiliary agent comprises the following steps:

[0016] S1, placing the weighed modified activated carbon and nano silver ion antibacterial agent in a high-energy ball mill, adding half the volume of deionized water, ball milling at a speed of 800-1200rpm for 60-90min, then adding modified nano titanium dioxide, and continuing ball milling for 40-60min to obtain a first mixed material;

[0017] S2, mixing the natural plant extract formaldehyde-removing agent and mildew-preventing agent with the remaining deionized water, stirring them at 50-60° C. with the aid of ultrasonic oscillation to fully dissolve them, then adding a surfactant, stirring at a speed of 1000-1500 rpm for 40-60 min, to form a second mixed solution;

[0018] S3. Slowly add the first mixed material into the second mixed liquid, and stir and mix at a speed of 600-800 rpm for 120-180 minutes under a vacuum environment. After testing various performance indicators to be qualified, the multi-effect antibacterial, anti-mildew, formaldehyde-removing and odor-removing auxiliary agent is obtained.

[0019] Furthermore, the ultrasonic oscillation temperature of S2 is 20-25°C, the ultrasonic power is 100-500W, and the ultrasonic frequency is 20-80kHz.

[0020] Furthermore, an all-in-one antibacterial, anti-mildew, formaldehyde-removing and odor-removing auxiliary agent is used in indoor household products, and the indoor household products include but are not limited to furniture panels, sofa fabrics, curtain fabrics, and carpets.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] (1) Multiple effects in one: The additive of the present invention integrates multiple functions such as antibacterial, mildew-proof, formaldehyde-free, odor-free and antiviral, and can simultaneously address multiple environmental health issues faced by indoor home furnishing products. When applied to furniture panels, it can not only effectively inhibit the growth of common bacteria such as Escherichia coli and Staphylococcus aureus, and fungi such as Candida albicans, but also prevent the panels from mildewing in a humid environment, and reduce problems such as damage and discoloration of panels caused by microbial reproduction. For soft furnishings such as sofa fabrics, curtain fabrics and carpets, it can also play a multi-faceted protective role, avoiding the spread of germs contaminated by frequent use and contact, and eliminating the growth of odors.

[0023] (2) Excellent antibacterial performance: The nano silver ion antibacterial agent it contains has a broad-spectrum antibacterial property and can produce a strong inhibitory effect on a variety of pathogens. Combined with the antibacterial active substances produced by modified nano titanium dioxide under light conditions, the overall antibacterial ability is further enhanced. This synergistic antibacterial mechanism enables the surface of household products to maintain a good antibacterial state for a long time.

[0024] (3) Highly effective mildew prevention: The mildew inhibitor, which is composed of zinc sulfate, chitosan and lysozyme in a specific proportion, works synergistically through multiple mechanisms to inhibit the growth of mold from multiple aspects, such as destroying the mold cell structure, interfering with mold metabolism and inhibiting the germination of mold spores.

[0025] (4) Powerful formaldehyde removal: In the natural plant extract formaldehyde removal agent, spider plant extract, eucalyptus leaf extract and mustard extract are compounded in a specific mass ratio. These plant ingredients are rich in active substances that can react chemically with formaldehyde, which can decompose formaldehyde into harmless substances such as carbon dioxide and water. At the same time, the photocatalytic effect of modified nano-titanium dioxide also helps to decompose formaldehyde. The synergistic effect of the two greatly improves the formaldehyde removal efficiency. After the additive is applied to indoor household products, it can continuously purify formaldehyde in the air and effectively reduce the indoor formaldehyde concentration.

[0026] (5) Effective antiviral: The nano silver ion antibacterial agent and modified nano titanium dioxide contained in it work synergistically with influenza virus H1N1, H3N2 and enterovirus EV71 to effectively inhibit the activity of the virus. When applied to home products such as furniture panels and sofa fabrics, it can reduce the risk of virus transmission in the home environment. DETAILED DESCRIPTION

[0027] In order to better understand the technical content of the present invention, specific embodiments are provided below to further illustrate the present invention.

[0028] Unless otherwise specified, the experimental methods used in the embodiments of the present invention are all conventional methods.

[0029] Unless otherwise specified, the materials, reagents, etc. used in the embodiments of the present invention can be obtained from commercial sources.

[0030] Example 1

[0031] A multi-effect antibacterial, anti-mildew, formaldehyde-removing and odor-removing auxiliary agent, comprising the following raw materials in parts by weight: 10 parts of modified nano titanium dioxide, 5 parts of nano silver ion antibacterial agent, 3 parts of natural plant extract formaldehyde-removing agent, 2 parts of mildew inhibitor, 22 parts of modified activated carbon, 5 parts of surfactant, and 30 parts of deionized water;

[0032] The modified nano titanium dioxide is prepared by dispersing nano titanium dioxide particles in an ethanol solution with a mass concentration of 35%, using an ultrasonic disperser for dispersion, with an ultrasonic frequency of 20 kHz, an ultrasonic power of 150 W, and ultrasonication for 40 minutes, adding a KH-570 silane coupling agent with a mass percentage of 2.5% of the particles for surface modification, and then performing a heat treatment to remove the solvent and solidify the modified layer to obtain a modified nano titanium dioxide with a particle size range of 1 nm; the mass volume ratio of the nano titanium dioxide particles to the ethanol solution is 8:80 g / mL;

[0033] The natural plant extract formaldehyde-removing agent is a mixture of Chlorophytum comosum extract, Eucalyptus leaf extract and Mustard extract in a mass ratio of 3:12:6;

[0034] The mildew inhibitor is zinc sulfate, chitosan and lysozyme in a mass ratio of 5:2:1, and the enzyme activity is greater than 2000U / mL;

[0035] The modified activated carbon is made by activating the activated carbon raw material with water vapor at 700°C, and its specific surface area is greater than 1500m 2 / g, pore volume greater than 0.8cm 3 / g, and a modified activated carbon with a pore size less than 2nm was obtained;

[0036] The surfactant is a nonionic surfactant, specifically fatty alcohol polyoxyethylene ether.

[0037] Example 2

[0038] A multi-effect antibacterial, anti-mildew, formaldehyde-removing and odor-removing auxiliary agent, comprising the following raw materials in parts by weight: 20 parts of modified nano titanium dioxide, 15 parts of nano silver ion antibacterial agent, 8 parts of natural plant extract formaldehyde-removing agent, 5 parts of mildew inhibitor, 28 parts of modified activated carbon, 8 parts of surfactant, and 50 parts of deionized water;

[0039] The modified nano titanium dioxide is prepared by dispersing nano titanium dioxide particles in an ethanol solution with a mass concentration of 50%, using a high-speed stirrer for dispersion, with a stirring rate of 500-1500 rpm, stirring for 1-1.5 hours, adding a KH-570 silane coupling agent with a mass concentration of 5.5% of the particles for surface modification, and then performing a heat treatment to remove the solvent and solidify the modified layer to obtain a modified nano titanium dioxide with a particle size range of 10 nm; the mass volume ratio of the nano titanium dioxide particles to the ethanol solution is 15:100 g / mL;

[0040] The natural plant extract formaldehyde removal agent is a mixture of Chlorophytum comosum extract, Eucalyptus leaf extract and Mustard extract in a mass ratio of 8:15:10;

[0041] The mildew inhibitor is zinc sulfate, chitosan and lysozyme in a mass ratio of 8:5:3, and the enzyme activity is greater than 2000U / mL;

[0042] The modified activated carbon is made by activating the activated carbon raw material with water vapor at 1000°C, and its specific surface area is greater than 1500m 2 / g, pore volume greater than 0.8cm 3 / g, and a modified activated carbon with a pore size less than 2nm was obtained;

[0043] The surfactant is a nonionic surfactant, specifically alkylphenol polyoxyethylene ether.

[0044] Example 3

[0045] A multi-effect antibacterial, anti-mildew, formaldehyde-removing and odor-removing auxiliary agent, comprising the following raw materials in parts by weight: 15 parts of modified nano titanium dioxide, 10 parts of nano silver ion antibacterial agent, 5 parts of natural plant extract formaldehyde-removing agent, 3 parts of mildew inhibitor, 25 parts of modified activated carbon, 7 parts of surfactant, and 40 parts of deionized water;

[0046] The modified nano titanium dioxide is prepared by dispersing nano titanium dioxide particles in an ethanol solution with a mass concentration of 45%, using an ultrasonic disperser for dispersion, with an ultrasonic frequency of 23kHz, an ultrasonic power of 200W, and ultrasonication for 50 minutes, adding a KH-570 silane coupling agent with a mass percentage of 4% of the particles for surface modification, and then performing a heat treatment to remove the solvent and solidify the modified layer to obtain a modified nano titanium dioxide with a particle size range of 5nm; the mass volume ratio of the nano titanium dioxide particles to the ethanol solution is 12:90 g / mL;

[0047] The natural plant extract formaldehyde-removing agent is a mixture of Chlorophytum comosum extract, Eucalyptus leaf extract and Mustard extract in a mass ratio of 5:13:8;

[0048] The mildew inhibitor is zinc sulfate, chitosan and lysozyme in a mass ratio of 7:3:2, and the enzyme activity is greater than 2000U / mL;

[0049] The modified activated carbon is made by activating the activated carbon raw material with water vapor at 800°C, and its specific surface area is greater than 1500m 2 / g, pore volume greater than 0.8cm 3 / g, and a modified activated carbon with a pore size less than 2nm was obtained;

[0050] The surfactant is a nonionic surfactant, specifically fatty alcohol polyoxyethylene ether;

[0051] The above examples 1-3 adopt the following preparation method:

[0052] S1, placing the weighed modified activated carbon and nano silver ion antibacterial agent in a high-energy ball mill, adding half the volume of deionized water, ball milling at a speed of 800-1200rpm for 60-90min, then adding modified nano titanium dioxide, and continuing ball milling for 40-60min to obtain a first mixed material;

[0053] S2, mixing the natural plant extract formaldehyde-removing agent and mildew-preventing agent with the remaining deionized water, and fully dissolving them by ultrasonic oscillation-assisted stirring at 50-60°C, the ultrasonic oscillation temperature is 20-25°C, the ultrasonic power is 100-500W, and the ultrasonic frequency is 20-80kHz, and then adding a surfactant, stirring at a speed of 1000-1500rpm for 40-60min to form a second mixed solution;

[0054] S3. Slowly add the first mixed material into the second mixed liquid, and stir and mix at a speed of 600-800 rpm for 120-180 minutes under a vacuum environment. After testing various performance indicators to be qualified, the multi-effect antibacterial, anti-mildew, formaldehyde-removing and odor-removing auxiliary agent is obtained.

[0055] Example 4

[0056] A multi-effect antibacterial, anti-mildew, formaldehyde-removing and odor-removing auxiliary agent, comprising the following raw materials in parts by weight: 15 parts of modified nano titanium dioxide, 10 parts of nano silver ion antibacterial agent, 5 parts of natural plant extract formaldehyde-removing agent, 3 parts of mildew inhibitor, 25 parts of modified activated carbon, 7 parts of surfactant, and 40 parts of deionized water;

[0057] The modified nano titanium dioxide is prepared by dispersing nano titanium dioxide particles in an ethanol solution with a mass concentration of 45%, using an ultrasonic disperser for dispersion, with an ultrasonic frequency of 23kHz, an ultrasonic power of 200W, and ultrasonication for 50 minutes, adding a KH-570 silane coupling agent with a mass percentage of 4% of the particles for surface modification, and then performing a heat treatment to remove the solvent and solidify the modified layer to obtain a modified nano titanium dioxide with a particle size range of 5nm; the mass volume ratio of the nano titanium dioxide particles to the ethanol solution is 12:90 g / mL;

[0058] The natural plant extract formaldehyde-removing agent is a mixture of Chlorophytum comosum extract, Eucalyptus leaf extract and Mustard extract in a mass ratio of 5:13:8;

[0059] The mildew inhibitor is zinc sulfate, chitosan and lysozyme in a mass ratio of 7:3:2, and the enzyme activity is greater than 2000U / mL;

[0060] The modified activated carbon is made by activating the activated carbon raw material with water vapor at 800°C, and its specific surface area is greater than 1500m 2 / g, pore volume greater than 0.8cm 3 / g, and a modified activated carbon with a pore size less than 2nm was obtained;

[0061] The surfactant is a nonionic surfactant, specifically fatty alcohol polyoxyethylene ether;

[0062] The above-mentioned Example 4 adopts the following preparation method:

[0063] S1, placing the weighed modified activated carbon and nano silver ion antibacterial agent in a high-energy ball mill, adding half the volume of deionized water, ball milling at a speed of 800 rpm for 60 minutes, then adding modified nano titanium dioxide, and continuing ball milling for 40 minutes to obtain a first mixed material;

[0064] S2, mixing the natural plant extract formaldehyde-removing agent and mildew-preventing agent with the remaining deionized water, and fully dissolving them by ultrasonic oscillation-assisted stirring at 50°C, the ultrasonic oscillation temperature is 20°C, the ultrasonic power is 100W, and the ultrasonic frequency is 20kHz, and then adding a surfactant, stirring at a speed of 1000rpm for 40min to form a second mixed solution;

[0065] S3. Slowly add the first mixed material into the second mixed liquid, stir and mix at a speed of 600 rpm for 120 minutes under a vacuum environment, and after testing various performance indicators to be qualified, the multi-effect antibacterial, anti-mildew, formaldehyde-removing and odor-removing auxiliary agent is obtained.

[0066] Example 5

[0067] A multi-effect antibacterial, anti-mildew, formaldehyde-removing and odor-removing auxiliary agent, comprising the following raw materials in parts by weight: 15 parts of modified nano titanium dioxide, 10 parts of nano silver ion antibacterial agent, 5 parts of natural plant extract formaldehyde-removing agent, 3 parts of mildew inhibitor, 25 parts of modified activated carbon, 7 parts of surfactant, and 40 parts of deionized water;

[0068] The modified nano titanium dioxide is prepared by dispersing nano titanium dioxide particles in an ethanol solution with a mass concentration of 45%, using an ultrasonic disperser for dispersion, with an ultrasonic frequency of 23kHz, an ultrasonic power of 200W, and ultrasonication for 50 minutes, adding a KH-570 silane coupling agent with a mass percentage of 4% of the particles for surface modification, and then performing a heat treatment to remove the solvent and solidify the modified layer to obtain a modified nano titanium dioxide with a particle size range of 5nm; the mass volume ratio of the nano titanium dioxide particles to the ethanol solution is 12:90 g / mL;

[0069] The natural plant extract formaldehyde-removing agent is a mixture of Chlorophytum comosum extract, Eucalyptus leaf extract and Mustard extract in a mass ratio of 5:13:8;

[0070] The mildew inhibitor is zinc sulfate, chitosan and lysozyme in a mass ratio of 7:3:2, and the enzyme activity is greater than 2000U / mL;

[0071] The modified activated carbon is made by activating the activated carbon raw material with water vapor at 800°C, and its specific surface area is greater than 1500m 2 / g, pore volume greater than 0.8cm 3 / g, and a modified activated carbon with a pore size less than 2nm was obtained;

[0072] The surfactant is a nonionic surfactant, specifically fatty alcohol polyoxyethylene ether;

[0073] The above-mentioned Example 5 adopts the following preparation method:

[0074] S1, placing the weighed modified activated carbon and nano silver ion antibacterial agent in a high-energy ball mill, adding half the volume of deionized water, ball milling at a speed of 1200 rpm for 60-90 min, then adding modified nano titanium dioxide, and continuing ball milling for 60 min to obtain a first mixed material;

[0075] S2, mixing the natural plant extract formaldehyde-removing agent and mildew-preventing agent with the remaining deionized water, and fully dissolving them by stirring with the aid of ultrasonic oscillation at 60°C, the ultrasonic oscillation temperature is 25°C, the ultrasonic power is 500W, and the ultrasonic frequency is 80kHz, and then adding a surfactant, stirring at a speed of 1500rpm for 60min to form a second mixed solution;

[0076] S3. Slowly add the first mixed material into the second mixed liquid, stir and mix at a speed of 800 rpm for 180 minutes under a vacuum environment, and after testing various performance indicators to be qualified, the multi-effect antibacterial, anti-mildew, formaldehyde-removing and odor-removing auxiliary agent is obtained.

[0077] Comparative Example 1

[0078] The difference between this comparative example and Example 3 is that a multi-effect all-in-one antibacterial, antifungal, formaldehyde-removing and odor-removing auxiliary agent comprises the following raw materials in parts by weight: 30 parts of modified nano titanium dioxide, 2 parts of nano silver ion antibacterial agent, 1 part of natural plant extract formaldehyde-removing agent, 8 parts of mildew inhibitor, 10 parts of modified activated carbon, 2 parts of surfactant, and 55 parts of deionized water;

[0079] Comparative Example 2

[0080] The difference between this comparative example and Example 3 is that the raw materials of the multi-effect all-in-one antibacterial, anti-mildew, formaldehyde-removing and odor-removing auxiliary agent do not contain natural plant-extracted formaldehyde-removing agents.

[0081] Comparative Example 3

[0082] The difference between this comparative example and Example 3 is that the raw materials of the multi-effect antibacterial, anti-mildew, formaldehyde-removing and odor-removing auxiliary agent do not contain mildew inhibitors.

[0083] Comparative Example 4

[0084] The difference between this comparative example and Example 3 is that the modified nano titanium dioxide of a multi-effect antibacterial, anti-mildew, formaldehyde-removing and odor-removing auxiliary agent is not modified.

[0085] Comparative Example 5

[0086] The difference between this comparative example and Example 3 is that the raw materials of the multi-effect antibacterial, anti-mildew, formaldehyde-removing and odor-removing auxiliary agent do not contain nano silver ion antibacterial agent.

[0087] The additives prepared in the above Examples 1-5 and Comparative Examples 1-5 were tested for their antibacterial, mildew-proof, formaldehyde-removing and odor-removing properties.

[0088] Test Example 1-Antibacterial Performance

[0089] According to the standard JC / T2039-2010 "Antibacterial and Mildew-proof Wood Decorative Panels", the antibacterial rate of the above-mentioned additives was tested, and the test bacteria included Escherichia coli, Staphylococcus aureus, and Candida albicans.

[0090] Inhibition rate = (diameter of test inhibition zone - diameter of control inhibition zone) / diameter of test inhibition zone × 100%;

[0091]

[0092]

[0093] Test Example 2 - Anti-mildew performance

[0094] The anti-mildew performance of the above additives was tested according to the standard JC / T2039-2010 "Antibacterial and Anti-mildew Wood Decorative Panels", and the anti-mildew grade was evaluated according to the degree of mold growth.

[0095] The anti-mildew grade is divided according to the common 0-4 grade standard

[0096] Level 0: No growth, that is, no growth can be seen with the naked eye, and the proportion of moldy area is 0%.

[0097] Level 1: Trace growth, i.e. growth is visible to the naked eye, but the growth covers an area less than 10% of the total area of ​​the test sample.

[0098] Level 2: Slight growth, mold colonies spread intermittently or are loosely distributed on the surface of the test sample, and mold growth occupies less than 30% of the total area.

[0099] Level 3: Moderate growth, mold grows and reproduces in large quantities, accounting for less than 70% of the total area.

[0100] Level 4: Severe growth, mold grows and reproduces in large quantities, accounting for more than 70% of the total area.

[0101] The mildew resistance rate can be calculated by the following formula: mildew resistance rate = (1-mildew growth area ratio) × 100%. The following is the test result data:

[0102]

[0103]

[0104] Test Example 3-Formaldehyde Removal Performance

[0105] Two identical sealed cabins were prepared, and formaldehyde was injected into the cabins by the sealed cabin method. The formaldehyde concentration in the cabin air was 1.2 mg / m 3 , put the additives in this application into one of the sealed chambers as a sample chamber; the other sealed chamber is used as a blank control chamber, without any sample, and the formaldehyde purification rate is tested after 4 hours.

[0106] Where C0 is the formaldehyde concentration in the blank control chamber, and C is the formaldehyde concentration in the sample chamber.

[0107] Formaldehyde purification rate (%) Example 1 96.1％ Example 2 94.5％ Example 3 95.5％ Example 4 93.6％ Example 5 93.1％ Comparative Example 2 74.1％ Comparative Example 4 80.6％

[0108] Test Example 4-Antivirus Performance

[0109] According to the group standard of "Antibacterial and Antiviral Finished Wood-Based Panels" (T / CNFPIA 3033-2023), the effects of the above additives against influenza viruses H1N1 and H3N2 and enterovirus EV71 were tested.

[0110] Positive control group: Add 100 μL of virus maintenance solution without adjuvant (DMEM culture medium containing 2% fetal bovine serum and 1% double antibody), and then add 100 μL of the corresponding virus suspension, and culture normally to observe the pathological effect of the virus on cells without the intervention of adjuvants, so as to compare and evaluate the antiviral effect of the adjuvant.

[0111] Negative control group: Add 200 μL of cell maintenance medium without viruses and adjuvants and culture normally to detect the normal growth state of cells without the influence of viruses and adjuvants, and ensure that there is no abnormal interference with the experimental results by the cells themselves and the culture conditions.

[0112] The MTT method was used to determine the activity rate of cells in each well to reflect the protective effect of the adjuvant on cell damage caused by virus infection.

[0113] The cell activity rate calculation formula is:

[0114]

[0115] By comparing the cell activity rate and cytopathic conditions of the experimental group and the positive control group, the inhibitory effect of the adjuvant on different viruses was evaluated. The inhibition rate of different concentrations of adjuvant on each virus was calculated using the following formula:

[0116]

[0117]

[0118] In summary, the auxiliary agent of the present application has good antibacterial, anti-mildew, formaldehyde removal and antiviral effects. The natural plant extract formaldehyde remover of the present invention is of natural origin and does not contain harmful chemicals. The spider plant extract, eucalyptus leaf extract and mustard extract cooperate with each other to play a synergistic role, which can effectively improve the removal efficiency of formaldehyde. The active ingredients in various plant extracts can act on formaldehyde through adsorption and decomposition. In addition to purifying formaldehyde, the natural plant extract formaldehyde remover can also remove odors and odors in the air and improve indoor air quality.

[0119] The invention can produce a synergistic effect when used in combination according to a specific mass ratio of (5-8): (2-5): (1-3). They start from different action targets and mechanisms, and jointly form a multi-faceted inhibition on the growth and reproduction of molds. On the one hand, zinc ions can interfere with the activity of key enzymes involved in the metabolism of molds, thereby hindering the normal growth and reproduction of molds. On the other hand, the ions dissociated from zinc sulfate in the solution can change the osmotic pressure of the microenvironment in which the mold cells are located, causing an imbalance in the water content in the cells, leading to a disorder in the physiological function of the cells, inhibiting the germination of mold spores and the elongation of hyphae, thereby achieving a mildew-proof effect; chitosan interacts with the negative charge on the mold cell membrane, thereby changing the permeability of the cell membrane, causing leakage of cell contents, and ultimately making the mold inactive; lysozyme has a certain specificity, and targets the unique structure of the mold cell wall for targeted destruction, effectively inhibiting the growth and reproduction of molds; the three components cooperate with each other, making the mildew-proof effect more significant than using any one of the components alone, greatly enhancing the resistance of the entire additive to molds, and effectively extending the mildew-proof cycle of the product.

[0120] The organic functional groups on the surface of modified nano-titanium dioxide can adjust its energy band structure, broaden the light absorption range, enable it to utilize more wavelengths of light energy, and may enhance its absorption capacity for visible light. In practical applications, when encountering light conditions, it can more efficiently generate photogenerated carriers (electrons and holes) with strong oxidizing properties. These photogenerated carriers can react with oxygen and water molecules in the air to generate active oxygen species such as hydroxyl radicals and superoxide radicals. These active oxygen species have strong oxidizing properties and can decompose organic pollutants, kill bacteria, and oxidize harmful gases such as formaldehyde into harmless carbon dioxide and water, thereby greatly enhancing the aldehyde removal and antibacterial functions of the additive.

[0121] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A multi-effect antibacterial, anti-mildew, formaldehyde-removing and odor-removing auxiliary agent, characterized in that: The invention comprises the following raw materials in parts by weight: 10-20 parts of modified nano titanium dioxide, 5-15 parts of nano silver ion antibacterial agent, 3-8 parts of natural plant extract formaldehyde removal agent, 2-5 parts of mildew preventer, 22-28 parts of modified activated carbon, 5-8 parts of surfactant and 30-50 parts of deionized water; the natural plant extract formaldehyde removal agent is a spider plant extract, a eucalyptus leaf extract and a mustard extract in a mass ratio of (3-8):(12-15):(6-10); the mildew preventer is zinc sulfate, chitosan and lysozyme in a mass ratio of (5-8):(2-5):(1-3); the enzyme activity is greater than 2000U / mL.

2. The multi-effect antibacterial, mildew-proof, formaldehyde-removing and odor-removing auxiliary agent according to claim 1, characterized in that: The invention comprises the following raw materials in parts by weight: 15 parts of modified nano titanium dioxide, 10 parts of nano silver ion antibacterial agent, 5 parts of natural plant extract formaldehyde removal agent, 3 parts of mildew preventer, 25 parts of modified activated carbon, 7 parts of surfactant and 40 parts of deionized water.

3. The multi-effect antibacterial, mildew-proof, formaldehyde-removing and odor-removing auxiliary agent according to claim 1, characterized in that: The modified nano titanium dioxide is prepared by dispersing nano titanium dioxide particles in an ethanol solution with a mass concentration of 35-50%, using an ultrasonic disperser or a high-speed stirrer for dispersion, adding a photosensitive coupling agent with a mass concentration of 2.5-5.5% of the particles for surface modification, and then performing heat treatment to remove the solvent and solidify the modified layer to obtain modified nano titanium dioxide with a particle size range of 1-10 nm; the mass volume ratio of the nano titanium dioxide particles to the ethanol solution is 8-15 g / mL:80-100.

4. The multi-effect antibacterial, mildew-proof, formaldehyde-removing and odor-removing auxiliary agent according to claim 3, characterized in that: The ultrasonic frequency of the ultrasonic disperser is 20-25kHz, the ultrasonic power is 150-300W, the ultrasonic time is 40-60min, the stirring rate of the high-speed stirrer is 500-1500rpm, and the stirring time is 1-1.5h.

5. The multi-effect antibacterial, mildew-proof, formaldehyde-removing and odor-removing auxiliary agent according to claim 3, characterized in that: The photosensitive coupling agent is selected from any one of KH-570 silane coupling agent, vinyl trimethoxysilane and vinyl tri-tert-butyl peroxysilane.

6. The multi-effect antibacterial, anti-mildew, formaldehyde-removing and odor-removing auxiliary agent according to claim 1, characterized in that: The modified activated carbon is made by activating the activated carbon raw material with water vapor at 700-1000°C, and its specific surface area is greater than 1500m 2 / g, pore volume greater than 0.8cm 3 / g, and a modified activated carbon with a pore size less than 2nm was obtained.

7. The multi-effect antibacterial, anti-mildew, formaldehyde-removing and odor-removing auxiliary agent according to claim 1, characterized in that: The surfactant is a nonionic surfactant, specifically one or more of fatty alcohol polyoxyethylene ether and alkylphenol polyoxyethylene ether.

8. The method for preparing a multi-effect antibacterial, anti-mildew, formaldehyde-removing and odor-removing auxiliary agent according to claim 1, characterized in that: The following steps are involved: S1, placing the weighed modified activated carbon and nano silver ion antibacterial agent in a high-energy ball mill, adding half the volume of deionized water, ball milling at a speed of 800-1200rpm for 60-90min, then adding modified nano titanium dioxide, and continuing ball milling for 40-60min to obtain a first mixed material; S2, mixing the natural plant extract formaldehyde-removing agent and mildew-preventing agent with the remaining deionized water, stirring them at 50-60° C. with the aid of ultrasonic oscillation to fully dissolve them, then adding a surfactant, stirring at a speed of 1000-1500 rpm for 40-60 min, to form a second mixed solution; S3. Slowly add the first mixed material into the second mixed liquid, and stir and mix at a speed of 600-800 rpm for 120-180 minutes under a vacuum environment. After testing various performance indicators to be qualified, the multi-effect antibacterial, anti-mildew, formaldehyde-removing and odor-removing auxiliary agent is obtained.

9. The method for preparing a multi-effect antibacterial, anti-mildew, formaldehyde-removing and odor-removing auxiliary agent as claimed in claim 8, characterized in that: The ultrasonic oscillation temperature of S2 is 20-25°C, the ultrasonic power is 100-500W, and the ultrasonic frequency is 20-80kHz.

10. Application of a multi-effect antibacterial, anti-mildew, formaldehyde-removing and odor-removing auxiliary agent in indoor household products, wherein the indoor household products include but are not limited to furniture panels, sofa fabrics, curtain fabrics, and carpets.

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