CN111374152A

CN111374152A - Bactericide and preparation method thereof, and air filter, mask, modified emulsion paint and modified concrete

Info

Publication number: CN111374152A
Application number: CN202010210949.XA
Authority: CN
Inventors: 余国强
Original assignee: Gordon Science Shenzhen Co ltd
Current assignee: Gordon Science Shenzhen Co ltd
Priority date: 2020-03-24
Filing date: 2020-03-24
Publication date: 2020-07-07
Anticipated expiration: 2040-03-24
Also published as: CN111374152B

Abstract

The invention relates to the field of sterilization and bacteriostasis, in particular to a bactericide and a preparation method thereof, and an air filter, a mask, modified emulsion paint and modified concrete. The bactericide comprises the following components in parts by weight: 0.1-1 part of graphene, 5-15 parts of photocatalyst, 0.1-1 part of aerogel, 60-80 parts of resin, 0.1-1 part of silver ions and 2-5 parts of copper ions. Through the cooperation of each component of graphene, photocatalyst, aerogel, resin, silver ion, copper ion, the effect of antibacterial, disinfecting is played in coordination, has high-efficient and lasting characteristics. The bactericide disclosed by the invention is applied to the air filter, so that the sterilizing effect of the filter can be improved, the mask prepared by using the air filter has no air resistance, and the sterilizing and disinfecting effects are efficient and durable; the bactericide disclosed by the invention can be applied to the emulsion paint to enhance the abrasion resistance of the emulsion paint; the bactericide of the invention is applied to concrete to enhance the impermeability strength of the concrete.

Description

Bactericide and preparation method thereof, and air filter, mask, modified emulsion paint and modified concrete

Technical Field

The invention relates to the field of sterilization and bacteriostasis, in particular to a bactericide and a preparation method thereof, and an air filter, a mask, modified emulsion paint and modified concrete.

Background

The existing masks popular in the market are of air filtration and air supply type, mainly comprise anti-virus, anti-dust, anti-smoke and the like, and are respectively medical masks, gauze masks, dust-proof masks, anti-gas masks and the like. In the aspect of epidemic prevention, the mask plays an important role. Although the existing mask has certain efficacy, the existing mask still has a plurality of defects; cannot be worn for a long time; the dust causes resistance to breathing; saliva produces an off-flavor; the untight sealing causes the infiltration of harmful substances such as viruses and the like; the belt is habitually pushed away to breathe fresh air after a period of time; the air supply type mask is inconvenient to carry and mainly used for specific people and professionals.

In view of the above, the present invention is particularly proposed.

Disclosure of Invention

According to one aspect of the invention, the invention relates to a bactericide which comprises the following components in parts by weight:

0.1-1 part of graphene, 5-15 parts of photocatalyst, 0.1-1 part of aerogel, 60-80 parts of resin, 0.1-1 part of silver ions and 2-5 parts of copper ions.

Through the cooperation of each component of graphene, photocatalyst, aerogel, resin, silver ion, copper ion, the effect of antibacterial, disinfecting is played in coordination, has high-efficient and lasting characteristics.

According to another aspect of the invention, the invention also relates to a preparation method of the bactericide, and the bactericide is obtained by mixing the components.

The method is simple and easy to implement, and the obtained bactericide can be used for efficiently sterilizing.

According to another aspect of the invention, the invention also relates to an air filter comprising a filter unit; the filtering unit comprises plant filtering layers and a mesh material filtering layer sprayed with a bactericide, which are arranged in a stacked manner;

the bactericide is as described above.

The air filter can better perform filtration sterilization and has excellent sterilization effect.

According to another aspect of the invention, the invention also relates to a mask, comprising a mask body and the air filter;

the mask body is provided with a first vent and a second vent;

a first air outlet of the air filter is connected with a first air vent of the mask body through a first air duct, and a second air inlet of the air filter is connected with a second air vent of the mask body through a second air duct;

the mask has excellent sterilization effect and can breathe smoothly.

In accordance with another aspect of the present invention, the present invention is also directed to a modified latex paint, including the germicidal agent and latex paint described above.

The overall performance of the emulsion paint obtained by adding the bactericide reaches the quality of superior products, and the hardness performance of the graphene improves the scrubbing resistance from one thousand times to more than five thousand times.

According to another aspect of the invention, the invention also relates to a modified concrete comprising the bactericide and the cement mortar as described above.

The modified concrete of the invention is used for leveling the surfaces of floors, walls and canals, not only can sterilize, inhibit algae and preserve heat, but also can solve the defects that the new concrete and the old concrete are difficult to bond, and the concrete is pulverized due to water shortage because of easy volatilization.

According to another aspect of the invention, the invention also relates to the application of the bactericide in epidemic prevention and sterilization of public places and/or public equipment.

The bactericide of the invention is used for spraying sterilization, and can achieve long-term sterilization and disinfection.

Compared with the prior art, the invention has the beneficial effects that:

(1) the bactericide disclosed by the invention has the characteristics of high efficiency and durability, and can synergistically play the antibacterial and bactericidal effects through the matching of the graphene, the photocatalyst, the aerogel, the resin, the silver ions and the copper ions.

(2) The components are mixed to obtain the bactericide, the method is simple and easy to implement, and the obtained bactericide can sterilize efficiently and durably.

(3) The air filter can better perform filtering sterilization.

(4) The mask has no air resistance, smooth breathing and high and lasting sterilizing effect.

(5) The overall performance of the emulsion paint obtained by adding the bactericide reaches the quality of superior products, and the hardness performance of the graphene improves the scrubbing resistance from one thousand times to more than five thousand times.

(6) The modified concrete obtained by adding the bactericide is used for leveling the surfaces of floors, walls and canals, and not only can sterilize, inhibit algae and preserve heat, but also solves the defects that the new concrete and the old concrete are difficult to bond and the concrete is pulverized due to water shortage because water is easy to volatilize.

(7) The bactericide of the invention is used for spraying sterilization, and can achieve long-term sterilization and disinfection.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic view of an overall structure of an air filter according to embodiments 5 to 7 of the present invention;

FIG. 2 is a schematic view of an internal structure of an air filter according to embodiments 5 to 7 of the present invention;

FIG. 3 is a schematic view of the overall structure of an air filter in embodiments 13 to 15 of the present invention;

FIG. 4 is a schematic view of an internal structure of an air filter in embodiments 13 to 15 of the present invention;

FIG. 5 is a schematic structural view of a filter unit according to example 5 of the present invention;

FIG. 6 is a schematic structural view of a filter unit according to example 6 of the present invention;

FIG. 7 is a schematic structural view of a filter unit according to example 7 of the present invention;

fig. 8 is a schematic view of a mask according to embodiments 13 to 15 of the present invention.

Reference numerals:

1-shell, 1-a-upper cover, 1-b-lower cover, 2-top cover, 3-control button, 4-a-first air inlet, 4-b-first air outlet, 5-a-second air inlet, 5-b-second air outlet, 6-filtering unit, 6-a-plant filtering layer, 6-b-net material filtering layer sprayed with bactericide, 6-c-active carbon filtering paper, 6-d-HEPA filtering net, 6-e-non-woven fabric and active carbon filtering paper composite layer, 7-exhaust fan, 8-controller, 9-a-first ultraviolet lamp, 9-b-second ultraviolet lamp, 10-isolation board, 11-mask body, 2-top cover, 3-control button, 12-a first vent of the mask body, 12-b-a second vent of the mask body, 13-a sound production unit, 14-a hanging belt of the mask body, 15-a first vent pipeline, 16-a second vent pipeline, 17-a first cavity and 17-b-a second cavity.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to examples, but it will be understood by those skilled in the art that the following examples are only illustrative of the present invention and should not be construed as limiting the scope of the present invention. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products commercially available.

Graphene has excellent bactericidal properties, but based on the possibility of diversity and variation of bacteria and viruses (e.g., novel coronaviruses), it is essential to enhance the diversity of bactericidal activity, and therefore, the combination with ions is an ideal means; the graphene has excellent electric and heat conducting properties, so that ions are accelerated to release electric ions, cell walls of bacteria and mould are adsorbed, and a microorganism transmission system is damaged, so that thalli are killed; the ions can also react with bacterial hydroxyl groups, destroying bacterial cell synthases. Under the excellent conductive and light absorption effects of graphene, ions can accelerate catalytic activity, and OH free radicals and active oxygen ions with strong oxidizing capability are generated, so that bacteria die.

The silver ions can kill colibacillus and the like, the copper ions can kill viruses and the like, the photocatalyst can kill cold germs, viruses and algae and moss inhibiting bacterial breeding, and the functions of the photocatalyst are further improved under the irradiation of sunlight. However, in the indoor environment, the illumination is not as good as the sunlight, the function of the photocatalyst is weakened, the electric conduction, the heat conduction and the light absorption performance of the graphene enable the function of the photocatalyst to be normally exerted, and an ultraviolet light source is applied, so that the effect is more obvious.

The aerogel has the capacity of adsorbing bacteria and viruses, the electric charge of graphene ions is active, the virus sedimentation is accelerated, the heat conductivity of graphene is combined with the heat insulation property of the silicon dioxide aerogel, the penetration of an external heat source is isolated, the heat insulation effect is effectively realized, and an indoor heat source can conduct heat quickly and preserve heat without leakage; the temperature is increased, and the virus propagation is more favorably inhibited. Studies have demonstrated that the new coronavirus is not viable at 56 degrees celsius for 30 minutes.

The graphene overcomes the defect of insufficient hardness of the acrylate, and the nano molecules enable the emulsion to easily permeate into micropores, so that the adhesive force is enhanced, the adhesive film can exist for a long time, the sterilization is carried out for a long time, and the waterproof and moistureproof effects are also achieved. Without water molecule leakage, the breeding of virus and bacteria, algae and moss is avoided.

Graphene, photocatalyst, silver ions, copper ions and aerogel materials are fixed in resin, so that dissociation is avoided, and the purpose of long-term sterilization is achieved.

In one embodiment, the graphene is 0.1 to 1 part, and may be 0.2 part, 0.3 part, 0.4 part, 0.5 part, 0.6 part, 0.7 part, 0.8 part, or 0.9 part.

In one embodiment, the photocatalyst is 5 to 15 parts, and may be selected from 6 parts, 7 parts, 8 parts, 9 parts, 10 parts, 11 parts, 12 parts, 13 parts, and 14 parts.

In one embodiment, the aerogel is 0.1 to 1 part, and can be selected from 0.2 part, 0.3 part, 0.4 part, 0.5 part, 0.6 part, 0.7 part, 0.8 part or 0.9 part.

In one embodiment, the resin is 60 to 80 parts, and may be selected from 61 parts, 63 parts, 65 parts, 68 parts, 70 parts, 75 parts and 78 parts.

In one embodiment, the silver ion is 0.1 to 1 part, and may be 0.2 part, 0.3 part, 0.4 part, 0.5 part, 0.6 part, 0.7 part, 0.8 part or 0.9 part.

In one embodiment, the amount of the copper ions is 2 to 5 parts, and 2.5 parts, 3 parts, 3.5 parts, 4 parts or 4.5 parts may be selected.

Preferably, the coating also comprises 0.1-1 part by weight of a dispersant;

preferably, the dispersing agent includes synthetic polymers, polyvalent carboxylic acids, coupling agents, silicates, and the like.

The dispersant can improve the dispersibility of solid or liquid materials and has high flocculation resistance. The invention is more beneficial to the stable and efficient sterilization of the bactericide by adding the dispersant with a specific dosage. BYK190 was used as the dispersant in the examples of the present invention.

Preferably, the coating also comprises 0.3-1.2 parts by weight of a defoaming agent;

preferably, the defoaming agent comprises mineral oil, alcohol, fatty acid and fatty acid ester, amide, phosphate ester, organic silicon, polyether and polyether modified polysiloxane defoaming agent.

According to the invention, the foam can be well prevented from forming by adding the defoaming agent with a specific dosage, so that the stability and excellent bactericidal effect of the obtained bactericide are facilitated. BYK028 was used as the defoamer in the examples of the invention.

Preferably, the resin comprises at least one of an acrylate, an epoxy resin and a modified epoxy resin;

preferably, the aerogel comprises a silica aerogel;

preferably, the graphene is graphene powder with ten layers or less.

In one embodiment, the bactericide comprises the following components in parts by weight: 0.1-1 part of graphene, 5-15 parts of photocatalyst, 0.1-1 part of aerogel, 60-80 parts of resin, 0.1-1 part of silver ions, 2-5 parts of copper ions, 0.1-1 part of dispersing agent and 0.3-1.2 parts of defoaming agent.

The bactericide obtained by matching the components is more beneficial to durable and efficient sterilization.

In one embodiment, the bactericide comprises the following components in parts by weight: 0.3-0.9 part of graphene, 8-12 parts of photocatalyst, 0.3-0.8 part of aerogel, 65-78 parts of resin, 0.3-0.7 part of silver ions, 2.5-4 parts of copper ions, 0.4-0.8 part of dispersing agent and 0.5-1.0 part of defoaming agent.

According to another aspect of the invention, the invention also relates to a preparation method of the bactericide, which comprises the following steps:

mixing the components to obtain the bactericide.

The method of the bactericide is simple and easy to implement, and the bactericide with excellent bactericidal effect can be obtained by mixing the components.

the bactericide is as described above.

The air filter has excellent sterilization effect by arranging the plant filter layer and the mesh material filter layer sprayed with the bactericide, has no air resistance, and is smooth in breathing.

Preferably, the air filter comprises a shell body which is formed by buckling an upper cover and a lower cover and is provided with a cavity, the upper cover is provided with a first air inlet, the lower cover is provided with a first air outlet, and a filtering unit and an exhaust fan are arranged in the cavity, so that air can reach the exhaust fan through the filtering unit;

preferably, a partition board is arranged inside the lower cover or the upper cover, the partition board divides the cavity into a first chamber and a second chamber, the second chamber surrounds and surrounds the first chamber, the first air inlet is located on the upper cover corresponding to the first chamber, the first air outlet is located on the lower cover corresponding to the first chamber, the filtering unit and the exhaust fan are arranged in the first chamber, and the second chamber is provided with a second air inlet and a second air outlet;

preferably, a controller is arranged inside the shell and electrically connected with the exhaust fan.

The controller comprises a power supply and a control circuit, wherein the power supply is electrically connected with the control circuit. The invention enables the exhaust fan to operate through the controller. The power supply can adopt a lithium battery.

Preferably, an ultraviolet light element is disposed inside the housing.

In one embodiment, the present invention provides an ultraviolet light element in both the first chamber and the second chamber;

the ultraviolet light element comprises an annular ultraviolet light and a cover which is communicated up and down; the cover surrounds and surrounds the annular ultraviolet lamp.

The axial direction of the filtering unit, the shell, the ultraviolet light element and the exhaust fan is collinear.

The ultraviolet light has a good sterilizing effect, and the ultraviolet light is matched with the sterilizing agent, so that the efficacy of the photocatalyst is further improved, and the sterilizing effect is more obvious. The ultraviolet light in the second chamber further sterilizes the gas exhaled by the body and then discharges the gas into the atmosphere.

Preferably, the shell is prepared from the following components in parts by weight:

0.1-1 part of graphene, 0.1-1 part of silver ions, 2-5 parts of copper ions, 5-15 parts of photocatalyst, 0.1-1 part of aerogel and 60-80 parts of plastic.

The shell of the air filter can be prepared from graphene, silver ions, copper ions, photocatalyst, aerogel and plastics, and has a good sterilization effect. The manufacturing process comprises extrusion, blow molding and injection molding.

Preferably, the shell shape comprises a dish, square or rectangle.

The air filter of the present invention may have a housing in the shape of a dish, square or rectangle.

Preferably, the upper cover is provided with a top cover, and a control button is arranged outside the top cover.

In one embodiment, the invention provides a first vent conduit external to the first air outlet; the other end of the air duct is provided with a film. It is matched with conventional mask to cover mouth and prevent external air.

The casing outside still is provided with the hole of charging, charges for the air purifier battery.

The control button is arranged on the top cover outside the shell to control the operation of the exhaust fan. And the ultraviolet light source is controlled by a switch.

Preferably, at least one side adjacent to the plant filter layer is provided with non-woven fabrics and/or filter paper;

the non-woven fabric adopts the static electricity treatment non-woven fabric used by the existing mask. The filter paper adopts filter paper which is used by the existing mask and is subjected to electrostatic treatment, or adopts activated carbon filter paper. Through further setting up non-woven fabrics and/or filter paper, can be better play filterable effect. Wherein the non-woven fabrics can be changed once a day.

And/or a HEPA filter screen is arranged between the plant filter layer and the mesh material filter layer sprayed with the bactericide.

HEPA (high efficiency air filter) filter screen has an effective rate of more than 99.7% for 0.1 micron and 0.3 micron, air can pass through, but fine particles can not pass through. HEPA divides five materials of PP filter paper, glass fiber, compound PP PET filter paper, melt-blown polyester non-woven fabrics and melt-blown glass fiber, has characteristics such as the windage is big, holds the dirt volume greatly, and the filter fineness is high. The HEPA filter screen can adopt an ultra-HEPA high-efficiency filter screen, can purify 99.9995 percent, can also adopt an antibacterial HEPA filter screen, and has good antibacterial effect.

Preferably, the plant of the plant filter layer comprises tea.

Preferably, the tea comprises at least one of green tea, black tea, white tea and yellow tea.

The tea contains tea polyphenol which is a plurality of raw elements beneficial to body health, and has the functions of bacteriostasis and disinfection, the color, the smell and the taste of the tea are the functions of the tea polyphenol, and in order to enable the tea fragrance containing the tea polyphenol to overflow more, the particle size of the tea cannot be crushed too much and pressed too much, so the graphene is added to enhance the air filtering capacity. The tea polyphenol and other substances enter the human body through the respiratory tract to be absorbed, and the tea fragrance can stabilize the mood of the human body, keep the spirit of the human body smooth, enhance the immunity and be beneficial to epidemic prevention. Theanine in green tea is also an anti-stress agent, and can improve learning ability and memory, and has effects of killing bacteria and stopping smoking. Furthermore, the plant filter layer has a good effect of removing arsenic, cadmium and lead which may enter respiratory tracts. Therefore, the air filter provided by the invention not only has the effects of sterilization and disinfection, but also has an excellent smoking cessation effect, so that people are stable in mood and refreshing, and the immunity is enhanced.

The plant filter layer can be replaced every 5-7 days. In one embodiment, 3 g of ordinary Tieguanyin tea leaves are taken, not crushed, wrapped by a fiber bag, placed into an air inlet of an on-board small air freshener, and started for 12 hours every day, and the tea aroma still exists after 15 days.

The plants of the plant filter layer of the invention also comprise Chinese herbal medicines, dried flowers and the like. The tea powder can be added with a proper amount of dried flowers such as jasmine and rose, and can also be added with any herbal medicine and essential oil which are beneficial to respiratory health; even drugs for preventing and treating respiratory diseases can be added.

The invention preferably selects the cheap crude tea leaves, and the filter paper is easy to replace and the price is low.

Preferably, the preparation method of the plant filter layer comprises the following steps:

mixing the dried plant, graphene and the bactericide, pressing and molding in a fiber net, and drying; the addition amount of the graphene is 0.1-0.2% of the mass of the plant drying substance, the addition amount of the bactericide is 1-5% of the mass of the plant drying substance, and the water content of the bactericide is 90-100%.

According to the invention, the plant filter layer obtained by mixing the dried plant, the graphene and the bactericide can be better used for filtering and sterilizing.

In one embodiment, the amount of the graphene added is 0.1% to 0.2% of the amount of the dried plant material, and may be 0.12%, 0.15%, or 0.17%.

In one embodiment, the amount of the fungicide added is 1% to 5% of the amount of the dried plant material, and may be 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, or 4.5%.

In one embodiment, the water content of the biocide is between 90% and 100%, and may alternatively be 92%, 95%, or 97%.

Preferably, the particle size of the plant dried substance is 1-10 mm.

In one embodiment, tea leaves prepared by a tea making process are ground into tea leaves with the particle size of 1-10mm, graphene powder with less than 10 layers is added into the tea leaves by 0.1-0.2%, the mixture is uniformly mixed, 1% -5% of the bactericide is added, the mixture is uniformly mixed, a ready-made tea bag fiber net (a net wrapping the tea leaves and putting the tea leaves in the tea pot) is placed in a mold, the tea leaves are placed in the mold to be pressed and formed, and the tea leaves are dried.

mixing the dried plant, graphene and water, carrying out extrusion forming and drying; the addition amount of the graphene is 0.1-0.2% of the mass of the plant drying substance, and the addition amount of the water is 1-8% of the mass of the plant drying substance.

In one embodiment, the amount of the graphene added is 0.1% to 0.2% of the amount of the dried plant material, and may be selected from 0.12%, 0.15%, and 0.17%.

In one embodiment, the amount of water added is 1% to 8% of the dry matter of the plant, and may be 2%, 3%, 4%, 5%, 6%, or 7%.

In a preferred embodiment, tea leaves prepared by a tea making process are ground into tea leaves with the particle size of 1-10mm, 0.1-0.2% of graphene powder with less than 10 layers is added into the tea leaves, 1% -8% of water is added into the tea leaves, the mixture is uniformly mixed, a ready-made tea bag fiber net (a net wrapping the tea leaves and putting the tea leaves into a teapot) is placed into a mold, the tea leaves are placed into the mold to be pressed and formed, and the tea leaves are dried.

preparing the plant dried substance according to the preparation method of the small bowl-shaped compressed mass of tea leaves, then carrying out extrusion forming and drying.

The plant filter layer can also be prepared into the small bowl-shaped compressed mass tea according to the preparation method of the small bowl-shaped compressed mass tea, and then the small bowl-shaped compressed mass tea is further pressed into the shape required by the invention by a mould.

The air filter of the present invention may also be used in conjunction with prior art conventional masks. Therefore, the air sucked by the human body is more beneficial to being free of germs, and the health of the human body is ensured.

The air filter of the present invention may also be applied to other types of air filtration systems.

the mask body is provided with a first vent and a second vent;

preferably, the mask body is prepared from the following components in parts by weight: 0.1-1 part of graphene, 0.1-1 part of silver ions, 2-5 parts of copper ions, 5-15 parts of photocatalyst, 0.1-1 part of aerogel and 60-80 parts of base material;

preferably, the substrate comprises at least one of plastic, rubber and silicone;

preferably, the mask body is provided with a sound production unit; the structure of the sound production unit sequentially comprises a mask body with holes, a filter layer and an inner cover from outside to inside, wherein the inner cover is provided with holes;

preferably, the filter layer comprises a non-woven fabric.

In one embodiment, the diameter of the hole of the mask body with the hole is 0.5-2 mm.

In one embodiment, the diameter of the hole of the inner cover is 3-8 mm. The shape of the inner cover of the sound generating unit of the present invention may be circular, etc.

In one embodiment, the aperture of the inner cover may also be of the barrier type.

In one embodiment, the base is 60 to 80 parts, and may be selected from 61 parts, 63 parts, 65 parts, 68 parts, 70 parts, 75 parts and 78 parts.

This application sets up sound producing unit on the gauze mask body, and then guarantees that the transmission that sound can be clear gives the person of exchanging. The non-woven fabric in the middle layer can better prevent pathogenic bacteria from entering the interior of the mask body.

When the mask is used, fresh air enters through the first air inlet of the upper cover, germs are removed through the filtering unit in the first chamber, the air flows out of the first air outlet and enters the mask body through the first air duct, the fresh air is provided for a body to ensure smooth breathing, air exhaled by the body enters the second chamber of the air filter through the second air duct under the pressure effect to be sterilized, and the sterilized air is discharged to the atmosphere through the second air outlet. The mask can be used permanently and cleaned with alcohol after use.

The mask body of the invention can be transparent, semitransparent or colored. The shape of the mask can be the shape of the N95 type mask in the prior art or other shapes, so that the mask is ensured to be tightly attached to the face, and the mask is more beneficial to sterilization and recycling the air exhaled by popular patients to a machine for repeated sterilization.

In one embodiment, the air filter and the vent on the mask body are movably connected with the vent pipeline, and the air filter and the vent can be connected through a connecting part. The diameter of the ventilation pipeline can meet the requirement that the human body breathes smoothly.

Preferably, the addition amount of the bactericide is 5-15% of the mass of the latex paint.

In one embodiment, the amount of the bactericide added is 5% to 15% of the mass of the latex paint, and may be selected from 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13% or 14%.

According to the invention, 5% -15% of bactericide stock solution is added into the emulsion paint to prepare the graphene bactericidal emulsion paint which is used for grain bin and household sterilization, heat insulation, heat preservation, water prevention, moisture prevention and the like.

According to the invention, after 10% of the bactericide is added into commercially available qualified latex paint (the latex paint is classified into qualified products, first-class products and superior products), the overall performance of the emulsion paint reaches the quality of the superior products. The hardness performance of the graphene enables the scrubbing resistance of the latex paint to be improved from one thousand times to more than five thousand times.

The modified concrete is prepared by adding the bactericide stock solution into the cement mortar, and is used for leveling the surfaces of the ground, the wall and a ditch, so that the modified concrete not only can sterilize and inhibit algae and preserve heat, but also can overcome the defects that the new concrete and the old concrete are difficult to bond and the concrete is pulverized due to water shortage because of easy volatilization of moisture, and the graphene can quickly derive the heat generated during the solidification of the concrete, thereby avoiding the cracking of the concrete, enhancing the density and the hardness of the concrete, having excellent impermeability and avoiding the breeding of bacteria and viruses due to the infiltration of sewage.

Preferably, the addition amount of the bactericide is 5-10% of the mass of the cement mortar.

In one embodiment, the addition amount of the bactericide is 5-10% of the mass of the cement mortar, and 6%, 7%, 8% or 9% can be selected.

In one embodiment, the cement mortar has an impermeability strength of 0.5MPa, and the cement mortar has an impermeability strength of 1.5MPa after the addition of 10% of the biocide.

According to another aspect, the invention also relates to the application of the bactericide in epidemic prevention and sterilization of public places and/or public equipment.

Preferably, the bactericide is mixed with water for spraying.

Preferably, the addition amount of the water is 80-150% of the mass of the bactericide.

The bactericide stock solution is used for epidemic prevention and sterilization of hospitals, vegetable market floors, ditches and the like, and after the bactericide is sprayed, the floors are covered with a layer of transparent adhesive film which is not abraded and smooth, so that bacteria and viruses are prevented from breeding due to sewage infiltration, and particularly the vegetable market is more anti-skid and easy to clean. And 80-150% of water is further added to prepare a transparent broad-spectrum bactericide which is used for long-term sterilization and disinfection of walls, ground and facilities in public places (such as stations, institutions, underground places and the like) and public equipment (such as carriages, cabins and the like), is suitable for any material and has no damage to the appearance of any material.

The present invention will be further explained with reference to specific examples and comparative examples.

Example 1

The bactericide comprises the following components in parts by weight:

0.1 part of graphene, 5 parts of photocatalyst, 0.1 part of silicon dioxide aerogel, 80 parts of modified epoxy resin, 0.1 part of silver ions, 5 parts of copper ions, 1 part of dispersing agent and 1.2 parts of defoaming agent;

the preparation method of the bactericide comprises the following steps: the components are mixed and stirred evenly to obtain the bactericide.

Example 2

The bactericide comprises the following components in parts by weight:

1 part of graphene, 15 parts of photocatalyst, 1 part of silicon dioxide aerogel, 60 parts of epoxy resin, 1 part of silver ions, 2 parts of copper ions, 0.5 part of dispersing agent and 0.8 part of defoaming agent;

Example 3

The bactericide comprises the following components in parts by weight:

0.5 part of graphene, 10 parts of photocatalyst, 0.7 part of silicon dioxide aerogel, 70 parts of acrylate, 0.8 part of silver ions, 3 parts of copper ions, 0.9 part of dispersing agent and 1.0 part of defoaming agent;

Example 4

The bactericide comprises the following components in parts by weight:

0.8 part of graphene, 8 parts of photocatalyst, 0.8 part of silicon dioxide aerogel, 75 parts of acrylate, 0.7 part of silver ions, 4 parts of copper ions, 0.7 part of dispersing agent and 0.8 part of defoaming agent;

Example 5

An air filter, as shown in fig. 1, 2 and 5, comprises a housing 1 formed by buckling an upper cover 1-a and a lower cover 1-b to form a cavity, wherein the upper cover 1-a is provided with a top cover 2, a control button 3 is arranged outside the top cover 2, the upper cover 1-a is provided with a first air inlet 4-a, the lower cover 1-b is provided with a first air outlet 4-b, and a filtering unit 6 and an exhaust fan 7 are arranged in the cavity, so that air can reach the exhaust fan 7 through the filtering unit 6; the filtering unit 6 is sequentially provided with an activated carbon filter paper 6-c, a plant filter layer 6-a and a mesh material filter layer 6-b (a metal mesh filter layer sprayed with a bactericide) sprayed with the bactericide, a controller 8 is arranged in the lower cover 1-b, and the controller 8 is electrically connected with the exhaust fan 7; the controller 8 comprises a power supply and a control circuit, and the power supply is electrically connected with the control circuit; a first ultraviolet lamp 9-a is arranged in the shell 1, so that ultraviolet light can irradiate the metal mesh filter layer sprayed with the bactericide; the shell body 1 is internally provided with a vertically through shell which surrounds and surrounds the annular ultraviolet lamp first ultraviolet lamp 9-a;

the fungicide prepared in said fungicide example 4;

the shell of the air filter is disc-shaped;

the preparation method of the plant filter layer comprises the following steps: crushing tea leaves prepared by a tea making process into tea powder with the particle size of 1-10mm, adding graphene powder with less than 0.1% and 10 layers into the tea powder, uniformly mixing, adding 3% of bactericide, uniformly mixing, placing a ready-made tea bag fiber net into a mold, placing the tea powder into the mold for compression molding, and drying; the water content of the bactericide is 90-100%.

Example 6

An air filter, as shown in fig. 1, 2 and 6, comprises a housing 1 formed by buckling an upper cover 1-a and a lower cover 1-b to form a cavity, wherein the upper cover 1-a is provided with a top cover 2, a control button 3 is arranged outside the top cover 2, the upper cover 1-a is provided with a first air inlet 4-a, the lower cover 1-b is provided with a first air outlet 4-b, and a filtering unit 6 and an exhaust fan 7 are arranged in the cavity, so that air can reach the exhaust fan 7 through the filtering unit 6; the filtering unit 6 is sequentially provided with a plant filtering layer 6-a, an HEPA filtering net 6-d and a net material filtering layer 6-b (a fiber net filtering layer sprayed with a bactericide) sprayed with the bactericide, a controller 8 is arranged in the lower cover 1-b, and the controller 8 is electrically connected with the exhaust fan 7; the controller 8 comprises a power supply and a control circuit, and the power supply is electrically connected with the control circuit; a first ultraviolet lamp 9-a is arranged in the shell 1, so that ultraviolet light can irradiate the metal mesh filter layer sprayed with the bactericide; the shell body 1 is internally provided with a vertically through shell which surrounds and surrounds the annular ultraviolet lamp first ultraviolet lamp 9-a;

the fungicide prepared in said fungicide example 4;

the shell of the air filter is disc-shaped;

the preparation method of the plant filter layer comprises the following steps: crushing tea leaves prepared by a tea making process into tea leaves with the particle size of 1-10mm, adding graphene powder with less than 0.2% and 10 layers into the tea powder according to the mass percent, adding water with the mass percent of 5%, uniformly mixing, placing a ready-made tea bag fiber net into a mold, placing the tea powder into the mold for compression molding, and drying.

Example 7

An air filter is shown in figures 1, 2 and 7 and comprises a shell 1 which is formed by buckling an upper cover 1-a and a lower cover 1-b and is provided with a cavity, wherein the upper cover 1-a is provided with a top cover 2, a control button 3 is arranged outside the top cover 2, the upper cover 1-a is provided with a first air inlet 4-a, the lower cover 1-b is provided with a first air outlet 4-b, and a filtering unit 6 and an exhaust fan 7 are arranged in the cavity, so that air can reach the exhaust fan 7 through the filtering unit 6; the filter unit 6 is sequentially provided with an electrostatic treatment non-woven fabric and active carbon filter paper 6-c, a plant filter layer 6-a, an HEPA filter screen 6-d and a mesh material filter layer 6-b (a metal mesh filter layer sprayed with a bactericide) sprayed with a bactericide, which are used by the existing mask, a controller 8 is arranged in the lower cover 1-b, and the controller 8 is electrically connected with the exhaust fan 7; the controller 8 comprises a power supply and a control circuit, and the power supply is electrically connected with the control circuit; a first ultraviolet lamp 9-a is arranged in the shell 1, so that ultraviolet light can irradiate the metal mesh filter layer sprayed with the bactericide; the shell body 1 is internally provided with a vertically through shell which surrounds and surrounds the annular ultraviolet lamp first ultraviolet lamp 9-a;

the fungicide prepared in said fungicide example 4;

the shell of the air filter is disc-shaped;

the preparation method of the plant filter layer comprises the following steps: the preparation method of the small Tuo tea is adopted to obtain the small Tuo tea, and then the small Tuo tea is extruded and formed and dried;

example 8

An air filter, compared with the embodiment 5, is not provided with a first ultraviolet lamp 9-a, and the preparation method of the plant filter layer comprises the following steps: crushing tea leaves prepared by a tea making process into tea powder with the particle size of 1-10mm, adding graphene powder with less than 0.2% and 10 layers into the tea powder, uniformly mixing, adding 5% of bactericide, uniformly mixing, placing a ready-made tea bag fiber net into a mold, placing the tea powder into the mold for compression molding, and drying; the water content of the bactericide is 90-100%, and other conditions are the same as those of example 5.

Example 9

An air filter was fabricated under the same conditions as in example 6, except that the bactericide obtained in example 1 was used as the bactericide.

Example 10

An air filter was fabricated under the same conditions as in example 1, except that the bactericide obtained in example 2 was used as the bactericide.

Example 11

An air filter except that casing 1 is prepared from the following components by weight: the conditions were the same as in example 5 except for 0.1 part of graphene, 1 part of silver ion, 2 parts of copper ion, 15 parts of photocatalyst, 0.1 part of aerogel and 60 parts of plastic.

Example 12

An air filter except that casing 1 is prepared from the following components by weight: the conditions were the same as in example 5 except for 0.5 part of graphene, 0.7 part of silver ion, 4 parts of copper ion, 10 parts of photocatalyst, 0.8 part of aerogel and 70 parts of plastic.

Example 13

A mask, as shown in fig. 8, comprises a mask body 11 and an air filter;

the overall structure of the air filter is schematically shown in FIG. 3, and the internal structure of the air filter is schematically shown in FIG. 4; the air filter comprises a shell 1 with a cavity formed by buckling an upper cover 1-a and a lower cover 1-b, wherein the upper cover 1-a is provided with a top cover 2, a control button 3 is arranged outside the top cover 2, the upper cover 1-a is provided with a first air inlet 4-a, the lower cover 1-b is provided with a first air outlet 4-b, and a filtering unit 6 and an exhaust fan 7 are arranged in the cavity, so that air can reach the exhaust fan 7 through the filtering unit 6; a partition plate 10 is arranged in the lower cover 1-b, the partition plate 10 divides the cavity into a first chamber 17-a and a second chamber 17-b, the second chamber 17-b surrounds the first chamber 17-a, the first air inlet 4-a is positioned on the upper cover 1-a corresponding to the first chamber 17-a, the first air outlet 4-b is positioned on the lower cover 1-b corresponding to the first chamber 17-a, the filtering unit 6 and the exhaust fan 7 are arranged in the first chamber 17-a, and the second chamber 17-b is provided with a second air inlet 5-a and a second air outlet 5-b; a controller 8 is arranged inside the shell 1, and the controller 8 is electrically connected with the exhaust fan 7; a first ultraviolet lamp 9-a is arranged in the first chamber 17-a, so that ultraviolet light can irradiate the metal mesh filter layer coated with the bactericide, and a vertically through cover shell is also arranged in the first chamber 17-a and surrounds the annular ultraviolet lamp first ultraviolet lamp 9-a; a second ultraviolet lamp 9-b is arranged in the second chamber 17-b, a vertically through housing is also arranged in the second chamber 17-b, and the housing surrounds and surrounds the annular ultraviolet lamp 9-b; the material of the mask shell is the same as that of example 11; the structure of the filter layer of the filter unit 6 is the same as that of the embodiment 6;

the mask body 11 is provided with a first vent 12-a and a second vent 12-b; the first air outlet 4-b of the air filter is connected with a first vent 12-a of the mask body through a first vent pipe 15, and the second air inlet 5-a of the air filter is connected with a second vent 12-b of the mask body through a second vent pipe 16; the mask body 11 is provided with a sound production unit 13; the sounding unit 13 sequentially comprises a mask body with holes, a non-woven fabric filter layer and an inner cover from outside to inside; a plurality of holes are formed in the inner cover; the mask body 11 is provided with a mask body hanging belt 14; the shape of the mask body is the same as that of an N95 type mask;

the mask body is prepared from the following components in parts by weight: 0.1 part of graphene, 1 part of silver ions, 2 parts of copper ions, 5 parts of photocatalyst, 0.6 part of silica aerogel and 60 parts of rubber.

Example 14

A mask is characterized in that except for the fact that a mask body is prepared from the following components in parts by weight: the conditions were the same as in example 13 except for 1 part of graphene, 0.1 part of silver ion, 5 parts of copper ion, 15 parts of photocatalyst, 0.6 part of silica gel, and 80 parts of plastic.

Example 15

A mask body is prepared from the following components in parts by weight as shown in figure 6: the conditions were the same as in example 13 except for 0.5 parts of graphene, 0.7 parts of silver ions, 3 parts of copper ions, 10 parts of photocatalyst, 0.8 part of silica aerogel and 70 parts of silica gel.

Example 16

A modified latex paint comprising a latex paint and the biocide prepared in example 3; the addition amount of the bactericide is 5% of the mass of the emulsion paint.

Example 17

A modified latex paint comprising a latex paint and the biocide prepared in example 3; the addition amount of the bactericide is 10% of the mass of the emulsion paint.

Example 18

A modified latex paint comprising a latex paint and the biocide prepared in example 3; the addition amount of the bactericide is 15% of the mass of the emulsion paint.

Example 19

A modified concrete comprising cement mortar and the bactericide prepared in example 4; the addition amount of the bactericide is 5% of the mass of the cement mortar.

Example 20

A modified concrete comprising cement mortar and the bactericide prepared in example 4; the addition amount of the bactericide is 8 percent of the mass of the cement mortar.

Example 21

A modified concrete comprising cement mortar and the bactericide prepared in example 4; the addition amount of the bactericide is 10% of the mass of the cement mortar.

Comparative example 1

A bactericide adopted by a filter removing unit of an air filter comprises the following components in parts by weight: the conditions were the same as in example 6 except for 0.05 parts of graphene, 4 parts of photocatalyst, 1.5 parts of aerogel, 85 parts of resin, 0.05 parts of silver ions, 1.5 parts of copper ions, 1.1 parts of dispersant and 1.5 parts of defoamer.

Comparative example 2

An air filter was fabricated under the same conditions as in example 6, except that the components of the bactericide used in the filter unit did not contain graphene, silver ions, and copper ions.

Comparative example 3

An air filter was fabricated under the same conditions as in example 6, except that the filter unit did not include the plant filter layer and the metal mesh filter layer coated with the bactericide.

Test examples

1. Sterilization performance detection of air filter of the present invention

The air filter prepared in the embodiment 4-12 has good sterilization effect when being subjected to sterilization performance test. The specific test method is as follows:

(1) test equipment

1) Strain: staphylococcus albus, escherichia coli;

2) microbial aerosol generator: TK-3;

3) culture medium: common nutrient agar culture medium;

4) a sampler: a six-level sieve mesh air impact type sampler;

(2) test conditions

1) Test chamber volume: 3m³

2) Ambient temperature: (20-25) DEG C

3) Ambient humidity: (50-70)% RH

(3) Test procedure

1) Taking a 4 th-7 th generation bacterial slant culture cultured at 37 ℃ for 24h, repeatedly purging with 10mL of nutrient broth, washing off lawn, filtering with sterile filter cotton, and diluting with the nutrient broth to an appropriate concentration to prepare bacterial suspension;

2) the experimental equipment is respectively placed into the two air fog chambers at one time, the door is closed, the air filter is opened for purification, and meanwhile, the temperature of the two air fog chambers is adjusted to be 20-25 ℃ and the humidity is adjusted to be 50-70% RH.

3) Starting a microbial aerosol generator to carry out spray contamination, continuously stirring for 10min by a fan after the microbial aerosol generator is finished, and then standing for 15 min;

4) simultaneously, sampling the test group and the control group by using six-level sieve mesh air impact type samplers respectively;

5) taking 2 parts of unused culture medium in the same batch, and culturing the culture medium and the sample sampled in the test at the same time to be used as negative control;

the 6 tests are repeated 3 times, and the arithmetic mean of the 3 test results is taken as the final test result.

(5) Formula for calculation

Natural mortality rate N_t(％)＝(V₀-V_t)/V₀×100％(V₀Air before test for control groupBacterial content, V_tAir bacteria content after test of control group);

bacterial removal rate Kt (%) ═ V₁×(1-N_t)-V₂]/[V₁×(1-N_t)]×100(V₁Air bacteria content, V, for test group before test₂Air bacteria content after test for test group).

Table 1 shows the sterilization effects of the air filters of examples 5 to 12 and comparative examples 1 to 3.

TABLE 1 Sterilization Effect of air Filter

Examples and comparative examples	Staphylococcus albus degerming Rate Kt (mean,%)	Coli bacteria removal rate Kt (mean,%)
			Example 5	97	97
Example 6	97.5	97
			Example 7	97	96
Example 8	92	91
			Example 9	96	95
Example 10	95	96
			Example 11	98	97.5
Example 12	99.5	99
			Comparative example 1	81	82
Comparative example 2	78	79
			Comparative example 3	76	75

As can be seen from table 1, the air filter of the present invention has an excellent sterilization effect, and thus can better ensure the health of the body.

2. The mask prepared in the embodiment 13-15 has the sterilization effect through the efficient sterilization of the air filter and the mask body with the sterilization effect, so that the dual sterilization and disinfection effects are achieved, and the body can breathe smoothly.

3. The specific application of the bactericide of the invention

(1) The application in public places and/or public equipment epidemic prevention and sterilization;

the bactericide stock solution is used for epidemic prevention and sterilization of hospitals, vegetable market floors, ditches and the like, and after the bactericide is sprayed, the floors are covered with a layer of transparent adhesive film which is not abraded and smooth, so that bacteria and viruses are prevented from breeding due to sewage infiltration, and particularly the vegetable market is more anti-skid and easy to clean.

The bactericide prepared in the bactericide embodiment 1-4 is added with 100% of water to be prepared into a transparent broad-spectrum bactericide, is used for long-term sterilization and disinfection of walls, ground and facilities in public places (such as stations, institutions, underground places and the like), and long-term sterilization and disinfection of public equipment (such as carriages, cabins and the like), is suitable for any material, and has no damage to the appearance of any material.

The invention has carried out the following experiments: selecting two glass fish tanks, coating one of the two glass fish tanks with the graphene ion bactericide, and directly filling the other glass fish tank with the same amount of water from the fish tank, wherein after one month, the fish tank which is not coated with the bactericide is full of moss algae, so that the water amount is reduced; the fish tank coated with the bactericide does not grow green moss algae at all, the water becomes clearer, and the water quantity is not reduced.

(2) The scrubbing resistance of the latex paint added with the bactericide is detected

The scrub resistance of the modified latex paint and the original latex paint (without adding a bactericide) prepared in the embodiments 16-18 of the invention is detected, and the result is shown in table 2;

TABLE 2 scrub resistance of the emulsion paints

	Number of scrub resistance
		Example 16	2500
Example 17	4000
		Example 18	5000
Raw latex paint	1000

As can be seen from Table 2, the addition of the bactericide of the present invention to the latex paint greatly improved the scrub resistance of the modified latex paint from one thousand times to over 2500 times. And the composite material is used for sterilization, heat insulation, water proofing, moisture proofing and the like of granaries and homes.

(3) The performance of the concrete added with the bactericide is detected

The modified concrete and the concrete without the bactericide are subjected to impermeability strength detection, and the results are shown in table 3;

TABLE 3 concrete impermeability strength test results

	Impervious strength (MPa)
		Example 19	0.8
Example 20	1.2
		Example 21	1.5
Concrete without adding bactericide	0.5

The modified concrete is prepared by adding the bactericide stock solution into the cement mortar, and is used for leveling the surfaces of the ground, the wall and the canal, so that the modified concrete not only can sterilize, inhibit algae and preserve heat, but also can overcome the defects that the new concrete is difficult to bond and the concrete is pulverized due to water shortage because of easy volatilization of water, the graphene can quickly guide heat generated during the solidification of the concrete, the cracking of the concrete is avoided, the density and the hardness of the concrete are enhanced, the modified concrete has excellent impermeability, and the breeding of bacteria and viruses caused by the infiltration of sewage is avoided. As can be seen from Table 3, the concrete with the addition of the specific fungicide of the present invention has an impermeability as high as 1.5MPa, which is far superior to the impermeability of the concrete without the addition of the fungicide.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. The bactericide is characterized by comprising the following components in parts by weight:

2. The bactericide as claimed in claim 1, further comprising 0.1 to 1 part by weight of a dispersant;

preferably, the aerogel comprises a silica aerogel;

preferably, the graphene is graphene powder with ten layers or less.

3. The method for producing a bactericide as claimed in claim 1 or 2, comprising the steps of:

mixing the components to obtain the bactericide.

4. An air filter, comprising a filter unit; the filtering unit comprises plant filtering layers and a mesh material filtering layer sprayed with a bactericide, which are arranged in a stacked manner;

the bactericide is the bactericide of claim 1 or 2;

preferably, a controller is arranged inside the shell and electrically connected with the exhaust fan;

preferably, an ultraviolet light element is arranged inside the shell;

0.1-1 part of graphene, 0.1-1 part of silver ions, 2-5 parts of copper ions, 5-15 parts of photocatalyst, 0.1-1 part of aerogel and 60-80 parts of plastic;

preferably, the shell shape comprises a dish, square or rectangle;

5. The air filter of claim 4, wherein at least one side of the plant filter layer adjacent to the plant filter layer is provided with non-woven fabric and/or filter paper;

6. The air filter of claim 4, wherein the plant of the plant filter layer comprises tea;

preferably, the tea comprises at least one of green tea, black tea, white tea and yellow tea;

mixing the dried plant, graphene and the bactericide, pressing and molding in a fiber net, and drying; the addition amount of the graphene is 0.1-0.2% of the mass of the plant drying substance, the addition amount of the bactericide is 1-5% of the mass of the plant drying substance, and the water content of the bactericide is 90-100%;

mixing the dried plant, graphene and water, carrying out extrusion forming and drying; the addition amount of the graphene is 0.1-0.2% of the mass of the plant drying substance, and the addition amount of the water is 1-8% of the mass of the plant drying substance;

7. A mask comprising a mask body and an air filter according to any one of claims 4 to 6;

the mask body is provided with a first vent and a second vent;

preferably, the filter layer comprises a non-woven fabric.

8. A modified latex paint comprising the germicidal agent of claim 1 or 2 and latex paint;

9. A modified concrete comprising the fungicide according to claim 1 or 2 and cement mortar;

10. Use of a fungicide according to claim 1 or 2 for the epidemic prevention and disinfection in public places and/or public facilities;

preferably, the bactericide is mixed with water for spraying;