CN111500127A - Broad-spectrum long-acting antibacterial coating spray and preparation method thereof - Google Patents
Broad-spectrum long-acting antibacterial coating spray and preparation method thereof Download PDFInfo
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- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
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Abstract
The invention relates to a conveniently used broad-spectrum long-acting antibacterial spray and a preparation method thereof, and the spray comprises the following raw material components in parts by weight: the antibacterial agent comprises, by weight, 25 parts of polymer emulsion, 1-5 parts of nano-silver antibacterial agent, 1-5 parts of nano-zinc antibacterial agent, 0.5-3 parts of zeolite powder, 3-5 parts of organic silicon waterproof agent, 2-10 parts of aqueous polyurethane adhesive, 0.2-1 part of nonionic dispersing agent, 0.5-0.8 part of organic guanidine antibacterial agent, 0.4-0.6 part of chitosan antibacterial agent, 0.1-0.2 part of organic silicon defoaming agent, 0.1-0.4 part of organic silicon base material wetting agent, 0.2-0.5 part of film forming auxiliary agent, 0.2-0.5 part of pH regulator and 20-45 parts of ultrapure water, wherein the polymer emulsion is a mixture of polyacrylic emulsion and polylactic acid emulsion in a weight ratio of 3: 1, can perform long-acting broad-spectrum sterilization, is strong in bactericidal power, has no toxic or side effect, is convenient to use, is suitable for families and public places, including humid and hot environments, can create effective sterile environments, and can guarantee the health of people.
Description
Technical Field
The invention belongs to the technical field of antibiosis, and particularly relates to a broad-spectrum long-acting antibacterial coating spray which is convenient to use and a preparation method thereof.
Background
At present, bacteria comprise a broad spectrum of common bacteria and pathogenic bacteria, pathogenic bacteria comprise escherichia coli, staphylococcus aureus, candida albicans and the like, hereinafter referred to as germs for short, viruses have large influence in contact transmission (including active organic matters and inorganic matters), the bacteria and the viruses still have transmission effect in the activation period of the surface of an object, and relevant reports indicate that the novel coronavirus can stay on a door handle to survive, has activity on the surface of the object such as fabric, stainless steel, plastic products, paper towels, glass products and the like, the survival time is different from 2h to 120h, during the period, the contact transmission of people and animals has extremely strong infectivity, the germs and the microorganisms are one of parasitic hosts of the coronavirus, the transmission of the germs and the microorganisms has the same danger as the transmission of the viruses in a specific time, and attention needs to be paid, and the work of resisting the germs and resisting the viruses has the same importance, the bacteriostasis is prevention, and the sterilization is treatment, and the prevention is taken as an idea, so that the transmission of pathogenic bacteria and toxin is prevented to the maximum extent.
The coating is used as the surface effect of most articles, such as clothes, and is widely applied to living goods, industrial manufacturing, home decoration, furniture and household appliances, textile industry, medical supplies and the like, so that the work of resisting germs and viruses on the surface coating is particularly important! The environment-friendly coating with the functions of resisting bacteria, viruses and inhibiting bacteria can be widely popularized under the background, thereby being beneficial to the prevention and control of virus transmission and being more beneficial to the long-term national health! Saving epidemic prevention resources and lasting protection after one-time investment.
The public places are important places for the public to engage in social activities, the quality of disinfection and antibiosis in the public places is directly related to whether the epidemic of infectious diseases can be effectively prevented and controlled, and the disinfection and antibiosis of the infectious diseases is to eliminate pathogens staying on the surfaces of different transmission media by a physical or chemical method so as to cut off the transmission path and prevent and control the occurrence of the infectious diseases. The purpose, effect and significance of the method are that (1) pathogen is prevented from spreading to the society to cause epidemic; (2) preventing the patients from being infected by other pathogens again, causing complications and cross infection; (3) meanwhile, the immune infection of medical personnel is also protected; of course, the above purpose is not achieved by only disinfection measures, and the infection control effect can be achieved by carrying out necessary isolation measures and aseptic operation in work at the same time. Families are harbors where people live outside social activities, and along with the increasing importance of people on health, the aseptic environment also has urgent needs.
In public places and families, the common disinfection and sterilization methods are a wiping method and a spraying method, 84 disinfectant or medical alcohol is adopted for spraying and wiping floors, furniture, articles and the like, and a soaking method is also adopted, so that articles needing to be disinfected, such as towels, rags and the like, are soaked by bleaching powder or 84 disinfectant; the disadvantages of the methods and measures are that the operation is frequent, the effect is relatively short, the news with safety accidents caused by improper use is seen in all ends, and meanwhile, the excessive use of the 84 disinfectant easily causes water pollution and harm to human bodies also exists.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a broad-spectrum long-acting antibacterial coating spray which can carry out long-acting and long-lasting broad-spectrum sterilization and bacteriostasis, is convenient to use, is suitable for families and public places including damp and hot environments, is a film-forming broad-spectrum long-acting antibacterial coating spray and a preparation method thereof, has long-acting antibacterial and bactericidal effect for 5 years, is suitable for various application scenes, particularly families, and public places with high pedestrian flow density, such as stations, hospitals and subways, can create a long-term effective sterile environment, avoids contact type transmission, and ensures the health of people.
The purpose of the invention is realized by the following technical scheme:
a broad-spectrum long-acting antibacterial coating spray comprises the following raw material components in parts by weight: 25 parts of polymer emulsion, 1-5 parts of nano-silver antibacterial agent, 1-5 parts of nano-zinc antibacterial agent, 0.5-3 parts of zeolite powder, 3-5 parts of organic silicon waterproof agent, 2-10 parts of waterborne polyurethane adhesive, 0.2-1 part of non-ionic dispersing agent, 0.5-0.8 part of organic guanidine antibacterial agent, 0.4-0.6 part of chitosan antibacterial agent, 0.1-0.2 part of organic silicon defoaming agent, 0.1-0.4 part of organic silicon base material wetting agent, 0.2-0.5 part of film forming auxiliary agent, 0.2-0.5 part of pH regulator and 20-45 parts of ultrapure water, wherein the polymer emulsion is a mixture of polyacrylic emulsion and polylactic acid emulsion, and the weight ratio of the polyacrylic emulsion to the polylactic acid emulsion is 3: 1.
Further, the nano-silver antibacterial agent is a nano-silver antibacterial aqueous solution with the particle size of 25 nanometers, and the nano-zinc antibacterial agent is a nano-zinc antibacterial aqueous solution with the particle size of 25 nanometers.
Furthermore, the zeolite powder is natural zeolite powder with fineness less than 8 microns, which is formed by grinding natural zeolite rocks.
Furthermore, the aqueous polyurethane adhesive is formed by dissolving or dispersing polyurethane in water.
Further, the organic guanidine antibacterial agent is an alkyl biguanide antibacterial agent.
Further, the chitosan antibacterial agent is a quaternized derivative of chitosan.
Further, the film-forming assistant is dipropylene glycol methyl ether,
further, the pH regulator is 2-amino-2-methyl-1-propanol,
further, the ultrapure water is water having a resistivity of 18M Ω · cm at 25 ℃.
The preparation method of the broad-spectrum long-acting antibacterial coating spray comprises the following steps:
step 1), uniformly mixing and dispersing a nano silver antibacterial agent, a nano zinc antibacterial agent, zeolite powder, a non-ionic dispersing agent and an organic silicon defoaming agent, and then grinding the mixed solution by a sand mill until the fineness is less than 8 microns; obtaining a first mixed solution;
step 2), dispersing the first mixed solution and the water-based polyurethane adhesive for 3-4 min at the rotating speed of 600 revolutions per minute until the first mixed solution and the water-based polyurethane adhesive are uniformly dispersed to obtain a second mixed solution;
step 3), uniformly dispersing the organic guanidine antibacterial agent and the chitosan antibacterial agent at the rotating speed of 800-1000 rpm for 5-8 minutes to obtain a third mixed solution;
step 4), uniformly dispersing a mixture of polyacrylic acid emulsion and polylactic acid emulsion, adding ultrapure water, an organic silicon base material wetting agent, an organic silicon waterproofing agent, a film forming aid, a second mixed solution and a third mixed solution, dispersing at the rotating speed of 1000 revolutions per minute for 10 minutes, adding a pH regulator during the dispersion, and adjusting the pH value to be 7.5-8 to obtain a broad-spectrum long-acting antibacterial coating spray stock solution;
and 5) subpackaging the stock solution of the broad-spectrum long-acting antibacterial spray, nitrogen and argon as spray power into small packages through filling equipment to obtain the broad-spectrum long-acting antibacterial spray.
The invention has the following positive effects:
the invention can carry out broad-spectrum sterilization for a long time and has strong bacteriostatic ability, no toxic or side effect, wide application range and convenient use, is suitable for families and public places including application in damp and hot environments, has the bacteriostatic and bactericidal long-term effect of up to 5 years, is suitable for various application scenes, particularly families, and public places with high stream density, such as stations, hospitals and subways, and can create a long-term effective sterile environment and ensure the health of people.
Wherein, the action mechanism of the nano silver ions is that the silver ions are activated to generate active oxygen (OH-), and bacteria and viruses are decomposed by oxidation; silver ion is the most active one of metal ions, and is activated to generate active oxygen (OH-) under the conditions of light and moisture (certain moisture is contained in the air); the safety is equal to active oxygen (OH-) of ions in the nature, has the oxidative decomposition capacity which is several times of that of ultraviolet rays and ozone, and has the effect of killing and decomposing bacteria and viruses; in recent years, household electrical appliances such as Japan, Xiapu, Panasonic and the like adopt the sterilization and deodorization technology; recently, some Japanese researchers have confirmed that silver ions generate active oxygen (OH-) even in water without light.
The nano zinc antibacterial agent is also called as organic nano zinc antibacterial powder, the action mechanism of nano zinc is that when zinc ions are attracted into the body of bacteria by negative charges, the nano zinc antibacterial agent has a sanitary self-cleaning function, natural metal zinc ions are nanocrystallized to have antibacterial effect, the outer layer of the nano zinc antibacterial agent can form a chelated molecular structure and is combined with the outer layer of the bacteria to cause various mechanisms of a cell membrane to be lost, when the zinc ions with positive charges are contacted with the bacteria, the cell wall of the bacteria is mostly negatively charged, and tensile force is generated under the condition that the amounts of the positive ions and the negative ions are unbalanced, so that the cell wall of the bacteria is pulled to be broken to generate holes, and the zinc ions cannot be (combined) into the cell wall to influence the propagation, when the zinc ions are attracted into the body by the negative charges and are combined with functional groups such as thiol group (-SH), hydroxyl group and the like in the bacteria, the bacteria cells cannot be normally, the powder has high antibacterial activity, long aging time and reasonable cost, and has strong inhibiting effect on harmful microorganisms such as escherichia coli, staphylococcus aureus, bacillus subtilis, sarcina lutea, rhodococcus rhodochrous and the like; the coating can effectively prevent the aging of the coating, improve the sanitary safety of products, has high-efficiency broad-spectrum antibacterial and mildew-proof effects, is insensitive to ultraviolet irradiation, does not corrode various metal materials, does not generate electric corrosion, does not volatilize, does not chemically react with most substances (except organic matters and inorganic matters and compounds capable of reducing silver), can be suitable for the coating fields of refrigerators, washing machines, air conditioners, water dispensers, telephones, textiles, shoes, floors, coatings, paints, pipes, ceramics, building materials, automobiles and the like, can meet the requirements of various transparent, natural and common coatings, meets the processing process requirements of various products, has the antibacterial validity period equal to the service life of the products, has the mildew-proof effect of 1-0 level, has no influence on the appearance of the products, has excellent color stability, is safe and reliable, because the antibacterial products adopt the complexing technology, metal ions are tightly complexed by organic macromolecules, the overflow is avoided, and the safety performance is reliable.
The chitosan antibacterial agent is a quaternized derivative of water-soluble chitosan, can be adsorbed on a bacterial cell membrane through electrostatic attraction to form a porous membrane, destroys the permeability of the cell membrane, prevents the cell membrane from normally absorbing nutrient substances, pumps out harmful substances and destroys the integrity of the cell membrane, and causes the exosmosis of substances in cells; chitosan with relative molecular mass less than 5000Da can diffuse into microorganism, and can inhibit mRNA synthesis under the action of DNA and other electronegative substances to destroy normal physiological activity; the chitosan has high nitrogen content and strong chelating ability, can be selectively combined with some trace metals, and can inhibit the generation of bacterial toxins and the propagation of bacteria; the actual antimicrobial process is a combination of one or more of these mechanisms, and their antimicrobial activity is related to a number of factors, such as the degree of deacetylation, relative molecular mass, pH, metal ion, ionic strength, and the like. The cell membrane and the cell wall are composed of phospholipid bilayers and have negative charges, and when bacteria are contacted with objects treated by cationic compounds, the bacteria with negative ionic charges can be attracted by cations, so that the free movement of the bacteria is restrained, the respiratory mechanism of the bacteria is inhibited, namely contact death occurs, and the antibacterial and bactericidal effects are realized.
Zeolite powder has good adsorbability and ion exchange property, is a good carrier of ionic antibacterial agent, and is mixed well by grinding.
The compound antibacterial agents are matched and cooperated with each other and are attached to the zeolite with good adsorbability, so that the broad-spectrum antibacterial effect can be realized, and meanwhile, the compound antibacterial agent has strong compatibility and can effectively kill bacteria, fungi, viruses, algae and the like.
Under the action of the aqueous polyurethane adhesive, the polyacrylic acid emulsion and the polylactic acid emulsion are used as film forming substances, and the antibacterial agent and the zeolite carrier are well bonded on the surface of an object, so that the antibacterial agent has long-acting antibacterial property, and meanwhile, because the antibacterial agent is completely aqueous, the antibacterial agent does not contain organic solvents such as benzene, formaldehyde and the like harmful to human bodies, is more environment-friendly and harmless, and is effectively applied to the surfaces of materials such as metal, wood, textile and the like, and the detection report result shows that the antibacterial rate of pathogenic bacteria is 100%; has strong bacteriostatic ability.
The organosilicon waterproofing agent is added in the formula, and the organosilicon material has excellent waterproof and synergistic effects, so that the organosilicon material can play a very good role in waterproof and synergistic effects, and the sterilization effect is further improved on the basis of the whole antibacterial sterilization, and the synergistic effect of the organosilicon waterproofing agent also plays a decisive role in the invention.
The invention is not the technical scheme of the conventional antibacterial agent at present; non-single nanosilver ionic type; non-single quaternary ammonium salt forms; non-single nano zinc type; non-single guanidine antibacterials; non-shell monosaccharide antibacterial type; the invention is a composite antibacterial composition type; the characteristics of high temperature resistance and rapid sterilization of nano silver ions are utilized; the slow antibacterial but wide characteristic of nano zinc ions is utilized; the characteristics of safety, wide application, environmental protection and biological property of guanidine and chitose antibacterial agents are utilized; the waterproof synergistic effect of the organosilicon waterproofing agent is utilized; the characteristics of the ultrafine zeolite powder on water purification and strong long-acting adsorption capacity are utilized; the characteristics of film forming property, stability, environmental protection and safety of the aqueous emulsion carrier are utilized; the spray product is formed by utilizing the physical, biological and chemical properties of viruses and bacteria and the positive and negative charges (anions and cations) physical confrontation, long-acting and lasting chemical properties, high temperature resistance, wide application, water resistance, synergism and biological comprehensiveness which are carried out by the spray product, thereby avoiding loopholes caused by various bacteria and viruses, and forming a film-forming property with comprehensive antibiosis, and synthesizing a nano-type zeolite system, a cationic composition system and a biological composition system and carrying out a combination experiment to obtain a good effect.
The antibacterial substances used in the invention are all positive charge, while the bacteria and viruses are negative charge, and are physical confrontation systems; the nano zinc and nano silver ion substances are combined with the polyurethane adhesive, dispersed at high speed, uniformly distributed among nano ions, and combined with the superfine-diameter zeolite liquid extracted by grinding to form an inorganic antibacterial zeolite system, the combination of the nano silver ions and the nano zinc ions makes up the defect that the nano silver ions cannot kill and inhibit bacteria quickly, the chronic ions and the acute ions of the nano zinc ions become a relatively comprehensive partner, the polyurethane adhesive is used as a hand pulling function to combine the nano zinc and the acute ions, and the unique performance of the zeolite absorbs and combines the nano zinc and the acute ions and releases the nano zinc and the acute ions at necessary time.
The organic guanidine antibacterial agent is added as a natural biological antibacterial agent, and the guanidine in the invention is a cationic surfactant, is easy to dissolve in water, has no foam in water solution and is convenient for field application. The sterilization mechanism of the microbial cell is mainly that the microbial cell has positive charges in aqueous solution, can be adsorbed on the surface of microorganisms to form micelles, and gradually permeates into a lipid layer and a protein layer of microbial cell plasma, so that the permeability of cell membranes is changed, cell contents are caused to permeate outwards, and the microorganisms are killed; at the same time, it can coagulate proteins, denature enzymes and structural proteins, thus destroying the metabolic system of the microorganism, leading to its death. The alkyl biguanide has the characteristics of antibiosis and sterilization, and has an inhibiting effect on microorganisms; the chitosan is a polysaccharide product extracted from shells of marine organisms and crustaceans, and oligosaccharide with the polymerization degree of 2-15 is generated after enzymolysis, so that the chitosan is a bactericide capable of inducing plants to generate disease-resistant factors, is a component used by the conventional bactericide at present, and enables biological bacteria and viruses to be incapable of surviving after being added, so that the antibacterial variety is more comprehensive. The biological property mentioned in the invention refers to natural biological antibacterial substances, such as natural antibacterial agents made of shellfish and shells in marine organism antibacterial species, and non-bacterial antagonistic systems.
Compared with other common antibacterial products such as a nano-silver system (with the antibacterial effect of 97-99 percent) and a quaternary ammonium salt system (with the antibacterial effect of 90-95 percent) in the market, the antibacterial agent has the advantages of comprehensive antibacterial types, strong persistence and waterproof synergy, and the detection result of the antibacterial agent is 99.9 percent of antibacterial effect, wherein any one of the four components of the nano-silver antibacterial agent, the nano-zinc antibacterial agent, the organic guanidine antibacterial agent and the chitosan antibacterial agent is optionally removed, and experimental detection shows that 99.9 percent of antibacterial effect of the antibacterial agent can be obviously reduced, and the organosilicon waterproof agent is removed from the whole formula, so that the durability of the antibacterial agent is influenced, and the antibacterial rate of the whole formula can also be reduced.
According to the invention, gases such as nitrogen, argon and the like are used as spraying agent power, so that the spraying agent is safe and has no trouble, and the price is higher compared with a common nano-silver system (the antibacterial effect is 97% -99%) in the market; the product with high cost, incomplete antibacterial variety and poor persistence of other antibacterial products such as quaternary ammonium salt system (with antibacterial effect of 90-95 percent) and the like is compared, and carrying out the endurance test and the verification of each unit in the biological laboratory of the quality supervision and inspection institute of Henan province and the institute of pharmacy of Zhengzhou university, wherein when an ultraviolet aging test box is used for aging test, the test sample is continuously subjected to irradiation exposure and a periodic water spraying circulation test under the conditions of black standard temperature of 50 +/-3 ℃ and air relative humidity (10 +/-5)%, the irradiation exposure is continued for 5 hours, then the irradiation exposure is continued at the black standard temperature of 20 +/-3 ℃ and the water spraying is carried out for 1 hour, the detection report is issued and displayed as follows: the bacteriostasis rates to escherichia coli, staphylococcus aureus and candida albicans are as follows: 99.9 percent, and the product has stronger lasting bacteriostatic effect and bactericidal effect.
The specific implementation mode is as follows:
for a better understanding of the present invention, the technical solutions and performances of the present invention are described in detail below with reference to specific examples. The preferred embodiments in the following description are given by way of example only.
Example 1: a broad-spectrum long-acting antibacterial coating spray comprises the following main agents in parts by weight: 18.75g of polyacrylic acid emulsion, 6.25g of polylactic acid emulsion, 1g of nano-silver antibacterial agent, 1g of nano-zinc antibacterial agent, 0.5g of zeolite powder, 3g of organic silicon waterproof agent, 2g of aqueous polyurethane adhesive, 0.2g of nonionic dispersing agent, 0.5g of organic guanidine antibacterial agent, 0.4g of chitosan antibacterial agent, 0.1g of organic silicon defoaming agent, 0.1g of organic silicon base material wetting agent, 0.2g of film-forming aid, 0.2g of pH regulator and 44.8g of ultrapure water.
Example 2: a broad-spectrum long-acting antibacterial coating spray comprises the following main agents in parts by weight: 18.75g of polyacrylic acid emulsion, 6.25g of polylactic acid emulsion, 5g of nano-silver antibacterial agent, 5g of nano-zinc antibacterial agent, 3g of zeolite powder, 5g of organic silicon waterproof agent, 10g of aqueous polyurethane adhesive, 1g of nonionic dispersing agent, 0.8g of organic guanidine antibacterial agent, 0.6g of chitosan antibacterial agent, 0.2g of organic silicon defoaming agent, 0.4g of organic silicon base material wetting agent, 0.5g of film-forming assistant, 0.5g of pH regulator and 43g of ultrapure water.
Example 3: a broad-spectrum long-acting antibacterial coating spray comprises the following main agents in parts by weight: 18.75g of polyacrylic acid emulsion, 6.25g of polylactic acid emulsion, 1g of nano-silver antibacterial agent, 5g of nano-zinc antibacterial agent, 0.5g of zeolite powder, 5g of organic silicon waterproof agent, 2g of aqueous polyurethane adhesive, 0.2g of nonionic dispersing agent, 0.7g of organic guanidine antibacterial agent, 0.4g of chitosan antibacterial agent, 0.1g of organic silicon defoaming agent, 0.4g of organic silicon base material wetting agent, 0.2g of film-forming aid, 0.5g of pH regulator and 45g of ultrapure water.
Example 4: a broad-spectrum long-acting antibacterial coating spray comprises the following main agents in parts by weight: 18.75g of polyacrylic acid emulsion, 6.25g of polylactic acid emulsion, 3g of nano-silver antibacterial agent, 3g of nano-zinc antibacterial agent, 2g of zeolite powder, 4g of organic silicon waterproof agent, 8g of aqueous polyurethane adhesive, 0.8g of nonionic dispersing agent, 0.7g of organic guanidine antibacterial agent, 0.6g of chitosan antibacterial agent, 0.2g of organic silicon defoaming agent, 0.3g of organic silicon base material wetting agent, 0.3g of film-forming aid, 0.3g of pH regulator and 27.8g of ultrapure water.
Example 5: a broad-spectrum long-acting antibacterial coating spray comprises the following main agents in parts by weight: 18.75g of polyacrylic acid emulsion, 6.25g of polylactic acid emulsion, 5g of nano-silver antibacterial agent, 3g of nano-zinc antibacterial agent, 2g of zeolite powder, 4g of organic silicon waterproof agent, 7g of aqueous polyurethane adhesive, 0.2g of nonionic dispersing agent, 0.8g of organic guanidine antibacterial agent, 0.6g of chitosan antibacterial agent, 0.2g of organic silicon defoaming agent, 0.2g of wetting agent, 0.5g of film-forming aid, 0.2g of pH regulator and 21.3g of ultrapure water.
Example 6: a broad-spectrum long-acting antibacterial coating spray comprises the following main agents in parts by weight: 18.75g of polyacrylic acid emulsion, 6.25g of polylactic acid emulsion, 4g of nano-silver antibacterial agent, 4g of nano-zinc antibacterial agent, 2g of zeolite powder, 4g of organic silicon waterproof agent, 5g of aqueous polyurethane adhesive, 0.2g of nonionic dispersing agent, 0.8g of organic guanidine antibacterial agent, 0.6g of chitosan antibacterial agent, 0.2g of organic silicon defoaming agent, 0.2g of organic silicon base material wetting agent, 0.5g of film-forming assistant, 0.2g of pH regulator and 28.3g of ultrapure water.
The preparation method of the broad-spectrum long-acting antibacterial coating spray in each embodiment is prepared by the following steps:
step 1), uniformly mixing and dispersing a nano-silver antibacterial agent, a nano-zinc antibacterial agent, zeolite powder, a non-ionic dispersing agent and an organic silicon defoaming agent, and then grinding the mixed solution by a sand mill until the fineness is less than 8 microns; obtaining a first mixed solution;
step 2), dispersing the first mixed solution and the water-based polyurethane adhesive for 3-4 min at the rotating speed of 600 revolutions per minute until the first mixed solution and the water-based polyurethane adhesive are uniformly dispersed to obtain a second mixed solution;
step 3), uniformly dispersing the organic guanidine antibacterial agent and the chitosan antibacterial agent at the rotating speed of 800-1000 rpm for 5-8 minutes to obtain a third mixed solution;
step 4), uniformly dispersing a mixture of polyacrylic acid emulsion and polylactic acid emulsion, adding ultrapure water, an organic silicon base material wetting agent, an organic silicon waterproofing agent, a film forming aid, a second mixed solution and a third mixed solution, dispersing at the rotating speed of 1000 revolutions per minute for 10 minutes, adding a pH regulator during the dispersion, and adjusting the pH value to be 7.5-8 to obtain a broad-spectrum long-acting antibacterial coating spray stock solution;
and 5) subpackaging the stock solution of the broad-spectrum long-acting antibacterial spray, nitrogen and argon as spray power into small packages through filling equipment to obtain the broad-spectrum long-acting antibacterial spray.
The broad-spectrum long-acting antibacterial spray in the embodiment is respectively used for preparing 7 +/-2 mu m coatings, leveling is carried out for 10min, 80-C baking is carried out for 30min, and normal-temperature curing is carried out for 7 d. The tested coating properties are shown in table 1:
the following detection methods all adopt national standard detection methods and are verified by various units in the quality supervision and inspection institute biological laboratory of Henan province and the institute of medicine of Zhengzhou university.
The test results for examples 1-6 are given in the following table:
the results of the film performance tests for examples 1-6 are shown in the following table:
Claims (10)
1. a broad-spectrum long-acting antibacterial coating spray is characterized in that: the material comprises the following raw material components in parts by weight: 25 parts of polymer emulsion, 1-5 parts of nano-silver antibacterial agent, 1-5 parts of nano-zinc antibacterial agent, 0.5-3 parts of zeolite powder, 3-5 parts of organic silicon waterproof agent, 2-10 parts of waterborne polyurethane adhesive, 0.2-1 part of non-ionic dispersing agent, 0.5-0.8 part of organic guanidine antibacterial agent, 0.4-0.6 part of chitosan antibacterial agent, 0.1-0.2 part of organic silicon defoaming agent, 0.1-0.4 part of organic silicon base material wetting agent, 0.2-0.5 part of film forming auxiliary agent, 0.2-0.5 part of pH regulator and 20-45 parts of ultrapure water, wherein the polymer emulsion is a mixture of polyacrylic emulsion and polylactic acid emulsion, and the weight ratio of the polyacrylic emulsion to the polylactic acid emulsion is 3: 1.
2. The broad-spectrum long-acting antibacterial coating spray of claim 1, wherein the nano-silver antibacterial agent is a nano-silver antibacterial aqueous solution with a particle size of 25 nm, and the nano-zinc antibacterial agent is a nano-zinc antibacterial aqueous solution with a particle size of 25 nm.
3. The broad-spectrum long-acting antibacterial coating spray as claimed in claim 1, wherein the zeolite powder is natural zeolite powder with fineness less than 8 μm, which is prepared by grinding natural zeolite rock.
4. The broad-spectrum long-acting antibacterial coating spray of claim 1, wherein the aqueous polyurethane adhesive is an adhesive formed by dissolving or dispersing polyurethane in water.
5. The broad-spectrum long-acting antibacterial coating spray of claim 1, wherein the organic guanidine antibacterial agent is an alkyl biguanide antibacterial agent.
6. The broad-spectrum, long-acting, antibacterial coating spray of claim 1, wherein the chitosan antibacterial agent is a quaternized derivative of chitosan.
7. The broad-spectrum, long-acting, antibacterial coating spray of claim 1, wherein the film-forming aid is dipropylene glycol methyl ether.
8. The broad-spectrum long-acting antibacterial coating spray of claim 1, wherein the pH adjuster is 2-amino-2-methyl-1-propanol.
9. The broad-spectrum long-acting antibacterial coating spray according to claim 1, wherein the ultrapure water is water having a resistivity of 18M Ω cm at 25 ℃.
10. The preparation method of the broad-spectrum long-acting antibacterial coating spray according to claims 1 to 9, which is characterized by comprising the following steps:
step 1), uniformly mixing and dispersing a nano-silver antibacterial agent, a nano-zinc antibacterial agent, zeolite powder, a non-ionic dispersing agent and an organic silicon defoaming agent, and then grinding the mixed solution by a sand mill until the fineness is less than 8 microns; obtaining a first mixed solution;
step 2), dispersing the first mixed solution and the water-based polyurethane adhesive for 3-4 min at the rotating speed of 600 revolutions per minute until the first mixed solution and the water-based polyurethane adhesive are uniformly dispersed to obtain a second mixed solution;
step 3), uniformly dispersing the organic guanidine antibacterial agent and the chitosan antibacterial agent at the rotating speed of 800-1000 rpm for 5-8 minutes to obtain a third mixed solution;
step 4), uniformly dispersing a mixture of polyacrylic acid emulsion and polylactic acid emulsion, adding ultrapure water, an organic silicon base material wetting agent, an organic silicon waterproofing agent, a film forming aid, a second mixed solution and a third mixed solution, dispersing at the rotating speed of 1000 revolutions per minute for 10 minutes, adding a pH regulator during the dispersion, and adjusting the pH value to be 7.5-8 to obtain a broad-spectrum long-acting antibacterial coating spray stock solution;
and 5) subpackaging the stock solution of the broad-spectrum long-acting antibacterial spray, nitrogen and argon as spray power into small packages through filling equipment to obtain the broad-spectrum long-acting antibacterial spray.
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