CN116179038A

CN116179038A - Special bio-based antibacterial coating for children

Info

Publication number: CN116179038A
Application number: CN202310026288.9A
Authority: CN
Inventors: 张国华; 胡乐平; 李平
Original assignee: Guangzhou Haoyi New Material Technology Co ltd
Current assignee: Guangzhou Haoyi New Material Technology Co ltd
Priority date: 2023-01-09
Filing date: 2023-01-09
Publication date: 2023-05-30

Abstract

The invention discloses a bio-based special antibacterial coating for children and a preparation method thereof, wherein the bio-based special antibacterial coating comprises 3-15 parts of antibacterial agent, 1-5 parts of tea saponin, 4-20 parts of plant extract, 300-360 parts of acrylic emulsion, 50-80 parts of compound emulsifier, 2-10 parts of antistatic agent, 10-20 parts of dip dyeing agent, 10-20 parts of adhesive, 1-5 parts of sodium aluminosilicate and 1-5 parts of glyceryl triacetate, wherein the plant extract comprises 1-5 parts of cassava extract, 1-5 parts of corn extract, 1-5 parts of palm tree extract and 1-5 parts of fresh bamboo extract. The beneficial effects are that: the added plant extract can replace petroleum derivatives in the traditional paint, so that the environmental pollution is reduced, meanwhile, the product of the plant extract is a renewable resource, can be recycled, cannot cause pollution damage to the environment, does not contain formaldehyde and toxic gas emitted by benzene compounds, and can emit fragrance of vegetation.

Description

Special bio-based antibacterial coating for children

Technical Field

The invention relates to the field of daily chemicals, in particular to a bio-based special antibacterial coating for children.

Background

The paint industry has become an important component of national economy, and paint yield and average yield have become one of the important marks of the current world for measuring the economic level. However, the paint industry itself has the property of polluting the environment. This has attracted considerable attention to society. Therefore, the development of environment-friendly paint is a general trend of world paint development.

Most of the prior art paint is mature in formaldehyde control, but has small antibacterial effect on the wall surface after the paint is used, and meanwhile, the used petroleum derivatives are more.

The bulletin number is: CN 111876043B. The water-based paint comprises the following raw materials in parts by weight: 20-40 parts of acrylic emulsion; 2-8 parts of 2, 2, 4-trimethyl-1, 3-pentanediol monoisobutyrate; 0.2-0.6 part of graphene oxide; 3-8 parts of lotus leaf hydrophobizing agent; 40-80 parts of water. The water paint of the invention has excellent antifouling water resistance and corrosion resistance.

The paint has the advantages of dirt resistance, water resistance and corrosion resistance, but petroleum derivatives are used in a large amount, the petroleum derivatives still exist for utilization, and the petroleum derivatives are non-renewable energy sources, so that the paint cannot be adverse to environmental protection, does not have good antibacterial capability, and has a certain harm to the use of the children houses.

For the problems in the related art, no effective solution has been proposed at present.

Disclosure of Invention

(one) solving the technical problems

Aiming at the defects of the prior art, the invention provides the special biological-based antibacterial coating for children, which is capable of replacing petroleum derivatives in the traditional coating, reducing environmental pollution, and simultaneously, the product of the plant extract is a renewable resource, can be recycled, does not cause pollution damage to the environment, and does not contain toxic gases like formaldehyde and benzene compounds, thereby solving the problems in the prior art.

(II) technical scheme

In order to realize the functions of replacing petroleum derivatives in the traditional paint, reducing environmental pollution and improving sterilization and disinfection of the paint, the invention adopts the following specific technical scheme:

the invention is realized in the following way:

according to another aspect of the invention, a bio-based antibacterial coating special for children is provided, which comprises the following components in parts by weight:

3-15 parts of antibacterial agent, 1-5 parts of tea saponin, 4-20 parts of plant extract, 300-360 parts of acrylic emulsion, 50-80 parts of compound emulsifier, 2-10 parts of antistatic agent, 10-20 parts of dip dyeing agent, 10-20 parts of adhesive, 1-5 parts of sodium aluminosilicate and 1-5 parts of glyceryl triacetate;

the plant extract comprises 1-5 parts of cassava extract, 1-5 parts of corn extract, 1-5 parts of palm tree extract and 1-5 parts of fresh bamboo extract.

Further, the compound emulsifier comprises 25-40 parts of lauric acid monoglyceride and 25-40 parts of propylene glycol fatty acid ester.

Further, the antibacterial agent comprises 1-5 parts of nano silver, 1-5 parts of China hemp fiber and 1-5 parts of chitosan.

Further, the antistatic agent comprises 1-5 parts of nano alumina and 1-5 parts of polyethylene glycol.

Further, the adhesive is 10-20 parts of hydroxyethyl methacrylate.

Further, the dyeing agent is 10-20 parts of methyl methacrylate.

According to another aspect of the present invention there is provided a preparation of a cassava extract comprising the steps of:

s101: soaking cassava skin in water for 30-60 min, cleaning, and oven drying at 30-60deg.C for 10-20 min to dehydrate cassava skin to 5-15%;

s102: crushing cassava skin into 30-60 meshes by crushing equipment to obtain cassava skin powder;

s103: adding 1 to the tapioca flour: extracting and filtering 2-1:5 water at 50-80 ℃ for 30-60 minutes to obtain water extract, adsorbing the water extract of S102 by D101 macroporous resin, and eluting with 45-60% methanol to obtain eluent;

s104: and (3) placing the eluent of the S103 in an environment of 50-80 ℃ for concentrating and drying until the water content is 1-5%, thus obtaining the cassava bark extract.

According to another aspect of the present invention, there is provided a corn extract preparation comprising the steps of:

s201: preparing a certain amount of corn starch into 35-45% starch milk by deionized water, and adjusting the pH value to 9-12 by using an ethanol water solution with the solubility of 1-5% when the corn starch is heated to 25-45 ℃ by a heating device;

s202: adding 0.1-0.4% phosphorus oxychloride into starch dry matter, maintaining pH value at 9-12 with 1-5% ethanol solution, and reacting for 2-4 hr;

s203: heating the solution to 30-60 ℃ after the reaction is finished, adding a certain amount of ferrous sulfate, and adjusting the pH value to 8-11 by using 1-5% ethanol solution;

s204: adding hydrogen peroxide with the mass of 2-4% and the concentration of 20-40% of the dry starch, stirring for 30-40 minutes in an environment of 40-60 ℃, maintaining the pH value to 8-11 by using 1-5% ethanol solution in the reaction process, and defoaming by using a defoaming agent;

s205: after 2-3 hours of reaction, stopping oxidation reaction by using catalase, regulating the pH value to 7-10, pre-pasting and drying by using a roller at the temperature of 30-60 ℃, and then crushing and screening by a screen of 30-60 meshes to obtain the gelatinized oxidized starch of the corn.

According to another aspect of the present invention, there is provided a method for preparing a bio-based antimicrobial coating for children, comprising the steps of:

s301: 3-15 parts of antibacterial agent is dissolved in 300-360 parts of acrylic emulsion, the temperature is increased to 60-90 ℃, after stirring is carried out for 30-60 minutes, the mixture is put into an ultrasonic generating device for ultrasonic reaction, the power of the ultrasonic generating device is 30-50kHz, and the oscillation time is 2-4 hours;

s302: cooling to 15-25 ℃ after oscillation, adding 50-80 parts of compound emulsifier, continuously stirring at 5-10 ℃ for reaction for 1-3 hours through low temperature control, heating to 10-25 ℃ and stirring for reaction for 3-5 hours, standing for 6-8 hours, and cleaning by using pentanediol with the concentration of 50-80%, thus obtaining film forming solution A;

s303: stirring 1-5 parts of tea saponin, 2-10 parts of antistatic agent, 1-5 parts of sodium aluminosilicate and 1-5 parts of glyceryl triacetate for 1-3 hours in an environment of 20-30 ℃ by a stirring device, and standing for 20-40 minutes to form a solution B;

s304: heating an oily solvent containing acetone to 35-45 ℃ in another group of stirring devices, then simultaneously adding 1-5 parts of cassava extract, 1-5 parts of corn extract, 1-5 parts of palm tree extract, 1-5 parts of fresh bamboo extract and 10-20 parts of adhesive, heating the solution to 40-70 ℃ by an electric heating device after the addition is finished, uniformly stirring for 40-60 minutes, obtaining a solution C after the stirring is finished, and simultaneously cooling the solution A and the solution B to 15-25 ℃;

s305: mixing the prepared film forming solution A, solution B and solution C with 10-20 parts of impregnating agent and the like, and uniformly stirring to obtain the coating.

The raw material components adopted by the invention are as follows:

nano silver: the nano silver is black powder, the nano silver is mixed into a medium or a matrix in different modes, the nano silver solution is a nano silver suspension, the color changes along with different concentrations, and the color gradually deepens along with the increase of the concentration, and is from yellow to dark red. The liquid has particles and rough texture, and has better sterilization effect.

Tea saponin: is a glycoside compound extracted from tea tree seeds and has certain bactericidal and insecticidal effects.

Hemp fiber powder: the hemp contains various metal elements, phenolic substances and derivatives thereof, organic acid and inorganic salt, and can destroy the structure of thalli; the hemp has a structure, is rich in oxygen and can not survive anaerobic bacteria, has obvious inhibiting and killing effects on staphylococcus aureus, escherichia coli, pseudomonas aeruginosa, candida albicans and the like through testing, and can be used for coating, developing footwear, clothing, medical supplies, artificial boards and the like.

Chitosan: the chitosan is deacetylated product of chitin, mainly derived from crusta of animals and insects, has good antibacterial property, safety and no toxicity, and also has unique physicochemical properties such as good moisture absorption and air permeability, reactivity, bioactivity, adsorptivity, fiber forming property and the like.

Acrylic emulsion: the acrylic emulsion is an emulsion formed by copolymerizing pure acrylic ester monomers, is small-particle-size, multipurpose and high-performance emulsion, is suitable for various paint formulas, has outstanding water resistance and weather resistance, and particularly has excellent performance in high-gloss and semi-gloss paint. The acrylic emulsion has good water resistance, alkali resistance and dirt resistance, and has good adhesion to the surfaces of masonry, wood and steel, and can be used for preparing not only flat, semi-gloss and high-gloss emulsion paint, but also coating paint for high-quality floors, cement encaustic tiles and tennis places.

Lauric acid monoglyceride: lauric acid monoglyceride, also known as dodecanoic acid monoglyceride, is a lipophilic nonionic surfactant, a compound naturally occurring in some plants. After extraction, the extract is often used as a bactericide and an anti-inflammatory agent to be added into foods, daily necessities or cosmetics.

Propylene glycol fatty acid ester: the propylene glycol fatty acid ester is obtained by esterification reaction of fatty acid and 1, 2-propylene glycol, the obtained product is a mixture of monoester and diester, and the propylene glycol fatty acid ester can be obtained by molecular distillation. The propylene glycol fatty acid ester has good foamability and emulsifying property, and the foamability depends on the monoester content, and the higher the monoester content is, the better the property is.

Nano aluminum oxide: reducing static charge generation, improving powder flowability, improving processability in an extruder, avoiding moisture absorption, prolonging storage stability, and increasing rheological property and corner coverage on a substrate.

Polyethylene glycol: a high-molecular polymer is prepared from HO (CH 2CH 2O) nH, and has no irritation, slightly bitter taste, good water solubility, and good compatibility with many organic components. Has excellent lubricity, moisture retention, dispersibility and cohesiveness, can be used as antistatic agents, softening agents and the like, and has extremely wide application in industries such as cosmetics, pharmacy, chemical fiber, rubber, plastics, papermaking, paint, electroplating, pesticides, metal processing, food processing and the like.

Methyl methacrylate: is an organic compound, has a chemical formula of C5H8O2, is colorless liquid, is slightly soluble in water, is soluble in ethanol and other organic solvents, and is used for manufacturing other resins, plastics, coatings, adhesives, lubricants, impregnating compounds of wood and cork, paper polishing agents and the like.

Hydroxyethyl methacrylate: is an organic matter, has a molecular formula of C6H10O3, a molecular weight of 130.1418, is colorless, transparent and flowable liquid, and is used for synthesizing medical high polymer materials, thermosetting coatings, adhesives and the like.

Sodium aluminosilicate: the relative density is about 2.6, the melting point is 1000-1100 ℃, and the refractive index is about 1.54. Is insoluble in water, ethanol and other solvents with chemical book, is partially dissolved in strong acid and alkali hydroxide solution at 80-100 ℃, and is prepared into 20% slurry with water without carbon dioxide, wherein the pH value is 6.5-10.5, and the main application is an anticaking agent.

Glyceryl triacetate: the product is a plasticizer with strong dissolving power for various resins, and is also a mild antibacterial agent.

Cassava extract: the tapioca flour is starch extracted from tuberous root of tropical plant belonging to the family of Aceraceae, and can be used for preparing alcohol, fructose, glucose, maltose, monosodium glutamate, beer, bread, biscuit, shrimp flake, vermicelli, sauce, plastic fiber plastic film, resin, coating material and chemical products such as adhesive, etc. by using the tapioca flour which belongs to the family of Aceraceae, castor oil, rubber and Jatropha curcas, and can be used for improving the smoothness of coating material and replacing petroleum derivatives in coating material.

Corn extract: the coating can improve the smoothness of the coating and replace petroleum derivatives in the coating, and meanwhile, the coating can enable a room to have a certain corn fragrance after being painted on the room, and the corn extract has a certain bonding capability.

Palm extract: as petroleum derivatives in the paint, carnauba wax is obtained by collecting and drying, beating from the leaves of the carnauba tree to loosen the wax, and then refining and bleaching the wax, most of the carnauba is aliphatic esters (40 wt%), 4-hydroxycinnamic acids of diesters (21.0 wt%), omega hydroxycarboxylic acids (13.0 wt%) and fatty alcohols (12 wt%), which are derived mainly from acids and alcohols in the range of C26-C30. The carnauba wax is characterized by high content of diester and methoxy cinnamic acid, and can improve the glossiness, waterproof performance and dry hardness of the paint after being smeared.

Fresh bamboo extract: the bamboo extract can replace petroleum derivatives in the paint, is mainly used as a deodorant, has a certain bactericidal effect, and is accompanied with a bamboo fragrance.

(III) beneficial effects

Compared with the prior art, the invention provides the special biological-based antibacterial paint for children and the preparation method thereof, and has the following beneficial effects:

(1) The invention can replace petroleum derivatives in traditional paint by the added plant extract, reduce environmental pollution, and the product of the plant extract is a renewable resource, can be reused, does not pollute and damage the environment, does not contain formaldehyde and toxic gas emitted by benzene compounds, and can emit fragrance of vegetation.

(2) The wall coated with the paint can be sterilized and disinfected by the added nano silver, chitosan and China hemp fiber, so that the wall is prevented from touching and naturally producing fungi and viruses, pathogen transmission is prevented, the bacterial content of the wall in a similar children room is reduced, and the protection of children is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a flow chart of a cassava extract preparation process for biobased child-specific antimicrobial coatings in accordance with an embodiment of the present invention;

FIG. 2 is a flow chart of a corn extract preparation of a bio-based child-specific antimicrobial coating in accordance with an embodiment of the present invention;

FIG. 3 is a flow chart of the preparation of a bio-based antimicrobial coating for children in accordance with an embodiment of the present invention;

fig. 4 is a data comparison of a bio-based child-specific antimicrobial coating in accordance with an embodiment of the present invention.

Detailed Description

For the purpose of further illustrating the various embodiments, the present invention provides the accompanying drawings, which are a part of the disclosure of the present invention, and which are mainly used to illustrate the embodiments and, together with the description, serve to explain the principles of the embodiments, and with reference to these descriptions, one skilled in the art will recognize other possible implementations and advantages of the present invention, wherein elements are not drawn to scale, and like reference numerals are generally used to designate like elements.

Wherein the compound emulsifier comprises 25-40 parts of lauric acid monoglyceride and 25-40 parts of propylene glycol fatty acid ester.

Wherein the antibacterial agent comprises 1-5 parts of nano silver, 1-5 parts of China hemp fiber and 1-5 parts of chitosan.

Wherein the antistatic agent comprises 1-5 parts of nano alumina and 1-5 parts of polyethylene glycol.

Wherein the adhesive is 10-20 parts of hydroxyethyl methacrylate.

Wherein the impregnating agent is 10-20 parts of methyl methacrylate.

In order to more clearly understand the above technical solutions of the present invention, the following describes the above solutions of the present invention in detail by means of specific examples.

Embodiment one:

3 parts of antibacterial agent, 1 part of tea saponin, 4 parts of plant extract, 300 parts of acrylic emulsion, 50 parts of compound emulsifier, 2 parts of antistatic agent, 10 parts of dip dyeing agent, 10 parts of adhesive, 1 part of sodium aluminosilicate and 1 part of glyceryl triacetate;

the plant extract comprises 1 part of cassava extract, 1 part of corn extract, 1 part of palm tree extract and 1 part of fresh bamboo extract.

Wherein the compound emulsifier comprises 25 parts of lauric acid monoglyceride and 25 parts of propylene glycol fatty acid ester.

Wherein the antibacterial agent comprises 1 part of nano silver, 1 part of China hemp fiber and 1 part of chitosan.

Wherein the antistatic agent comprises 1 part of nano alumina and 1 part of polyethylene glycol.

Wherein the adhesive is 10 parts of hydroxyethyl methacrylate.

Wherein the impregnating agent is 10 parts of methyl methacrylate.

A preparation of a cassava extract comprising the steps of:

s101: soaking cassava peels in water for 30 minutes, cleaning the cassava peels, and drying the cassava peels for 10 minutes in the environment of 30 ℃ of a drying furnace to enable the cassava peels to be dehydrated to 5%;

s102: crushing cassava skin into 30 meshes by crushing equipment to obtain cassava skin powder;

s103: adding 1 to the tapioca flour: 2, extracting and filtering water at 50 ℃ for 30 minutes to obtain water extract, adsorbing the water extract of S102 by D101 macroporous resin, and eluting with 45% methanol to obtain eluent;

s104: and (3) concentrating and drying the eluent of the step (S103) in an environment of 50 ℃ until the water content is 1%, thus obtaining the cassava bark extract.

s201: preparing a certain amount of corn starch into 35% starch milk by using deionized water, and adjusting the pH value to 9 by using an ethanol water solution with the solubility of 1% when the corn starch is heated to 25 ℃ by a heating device;

s202: adding 0.1% phosphorus oxychloride into the starch dry matter, maintaining the pH value to be 9 by using 1% ethanol solution, and reacting for 2 hours;

s203: after the reaction is finished, heating the solution to 30 ℃, adding a certain amount of ferrous sulfate, and regulating the pH value to 8 by using a 1% ethanol solution;

s204: adding hydrogen peroxide with the concentration of 20% and the dry mass of 2% of starch, stirring for 30 minutes in an environment of 40 ℃, and maintaining the pH value to be 8 by using a 1% ethanol solution in the reaction process, and simultaneously defoaming by using a defoaming agent;

s205: after 2 hours of reaction, stopping the oxidation reaction by using catalase, adjusting the pH value to 7, pre-pasting and drying the corn in a roller at the temperature of 30 ℃, and then crushing and screening the corn by a screen of 30 meshes to obtain the gelatinized oxidized starch.

s301: 3 parts of antibacterial agent is dissolved in 300 parts of acrylic emulsion, the temperature is increased to 60 ℃, after stirring is carried out for 30 minutes, the mixture is put into an ultrasonic generating device for ultrasonic reaction, the power of the ultrasonic generating device is 30kHz, and the oscillation time is 2 hours;

s302: cooling to 15 ℃ after oscillation is finished, adding 50 parts of compound emulsifier, continuously stirring and reacting for 1 hour at 5 ℃ through low-temperature control, heating to 10 ℃ and stirring and reacting for 3 hours, standing for 6 hours, and cleaning by using pentanediol with the concentration of 50%, thus obtaining film forming solution A;

s303: stirring 1 part of tea saponin, 2 parts of antistatic agent, 1 part of sodium aluminosilicate and 1 part of glyceryl triacetate for 1 hour in an environment of 20 ℃ by a stirring device, and standing for 20 minutes to form a solution B;

s304: heating an oily solvent containing acetone to 35 ℃ in another group of stirring devices, then adding 1 part of a cassava extract, 1 part of a corn extract, 1 part of a palm tree extract, 1 part of a fresh bamboo extract and 10 parts of an adhesive simultaneously, heating the solution to 40 ℃ by an electric heating device after the addition is finished, uniformly stirring for 40 minutes, obtaining a solution C after the stirring is finished, and simultaneously cooling the solution A and the solution B to 15 ℃;

s305: and mixing the prepared film forming solution A, solution B and solution C with 10 parts of impregnating agent and the like, and uniformly stirring to obtain the coating.

Embodiment two:

the special biological-based antibacterial coating for children comprises the following components in parts by mass:

9 parts of antibacterial agent, 3 parts of tea saponin, 12 parts of plant extract, 330 parts of acrylic emulsion, 70 parts of compound emulsifier, 6 parts of antistatic agent, 15 parts of dip dyeing agent, 15 parts of adhesive, 3 parts of sodium aluminosilicate and 3 parts of glyceryl triacetate;

the plant extract comprises 3 parts of cassava extract, 3 parts of corn extract, 3 parts of palm tree extract and 3 parts of fresh bamboo extract.

Wherein the compound emulsifier comprises 35 parts of lauric acid monoglyceride and 35 parts of propylene glycol fatty acid ester.

Wherein the antibacterial agent comprises 3 parts of nano silver, 3 parts of China hemp fiber and 3 parts of chitosan.

Wherein the antistatic agent comprises 3 parts of nano alumina and 3 parts of polyethylene glycol.

Wherein the adhesive is 15 parts of hydroxyethyl methacrylate.

Wherein the impregnating agent is 15 parts of methyl methacrylate.

A preparation of a cassava extract comprising the steps of:

s101: soaking cassava skin in water for 45 minutes, cleaning the cassava skin, and drying the cassava skin for 15 minutes in the environment of 45 ℃ of a drying furnace to dehydrate the cassava skin to 10%;

s102: crushing cassava skin into 45 meshes through crushing equipment to obtain cassava skin powder;

s103: adding 1 to the tapioca flour: 4, extracting and filtering water at 60 ℃ for 45 minutes to obtain water extract, adsorbing the water extract of S102 by D101 macroporous resin, and eluting with 55% methanol to obtain eluent;

s104: and (3) concentrating and drying the eluent of the step (S103) in an environment of 65 ℃ until the water content is 3%, thus obtaining the cassava bark extract.

s201: preparing a certain amount of corn starch into 40% starch milk by using deionized water, and adjusting the pH value to 10 by using an ethanol water solution with the solubility of 3% when the corn starch is heated to 35 ℃ by a heating device;

s202: adding 0.25% phosphorus oxychloride into the starch dry matter, maintaining the pH value to be 10 by using a 3% ethanol solution, and reacting for 3 hours;

s203: after the reaction is finished, the temperature of the solution is raised to 45 ℃, a certain amount of ferrous sulfate is added, and the pH value is regulated to 10 by 3% ethanol solution;

s204: adding hydrogen peroxide with the concentration of 30% and the dry mass of 3% of starch, stirring for 35 minutes in an environment of 50 ℃, and maintaining the pH value to be 10 by using a 3% ethanol solution in the reaction process and defoaming by using a defoaming agent;

s205: after 2.5 hours of reaction, stopping the oxidation reaction by using catalase, adjusting the pH value to 8, pre-pasting and drying the corn in a roller at the temperature of 45 ℃, and then crushing and screening the corn by a screen of 45 meshes to obtain the gelatinized oxidized starch.

s301: 9 parts of antibacterial agent is dissolved in 330 parts of acrylic emulsion, the temperature is increased to 75 ℃, after stirring is carried out for 45 minutes, the mixture is put into an ultrasonic generating device for ultrasonic reaction, the power of the ultrasonic generating device is 40kHz, and the vibration time is 3 hours;

s302: cooling to 20 ℃ after oscillation is finished, adding 65 parts of compound emulsifier, continuously stirring at 8 ℃ for reaction for 2 hours through low-temperature control, heating to 15 ℃ and then stirring for reaction for 4 hours, standing for 7 hours, and then cleaning by using pentanediol with the concentration of 65%, thus obtaining film forming solution A;

s303: 3 parts of tea saponin, 6 parts of antistatic agent, 3 parts of sodium aluminosilicate and 3 parts of glyceryl triacetate are stirred for 2 hours in an environment of 25 ℃ by a stirring device, and then are kept stand for 30 minutes to form a solution B;

s304: heating an oily solvent containing acetone to 40 ℃ in another group of stirring devices, then adding 3 parts of cassava extract, 3 parts of corn extract, 3 parts of palm tree extract, 3 parts of fresh bamboo extract and 15 parts of adhesive simultaneously, heating the solution to 55 ℃ by an electric heating device after the addition is finished, uniformly stirring for 50 minutes, obtaining a solution C after the stirring is finished, and simultaneously cooling the solution A and the solution B to 20 ℃;

s305: and mixing the prepared film forming solution A, solution B and solution C with 15 parts of a dyeing agent and the like, and uniformly stirring to obtain the coating.

Embodiment III:

15 parts of antibacterial agent, 5 parts of tea saponin, 20 parts of plant extract, 360 parts of acrylic emulsion, 80 parts of compound emulsifier, 10 parts of antistatic agent, 20 parts of dip dyeing agent, 20 parts of adhesive, 5 parts of sodium aluminosilicate and 5 parts of glyceryl triacetate;

the plant extract comprises 5 parts of cassava extract, 5 parts of corn extract, 5 parts of palm tree extract and 5 parts of fresh bamboo extract.

Wherein the compound emulsifier comprises 40 parts of lauric acid monoglyceride and 40 parts of propylene glycol fatty acid ester.

Wherein the antibacterial agent comprises 5 parts of nano silver, 5 parts of China hemp fiber and 5 parts of chitosan.

Wherein the antistatic agent comprises 5 parts of nano alumina and 5 parts of polyethylene glycol.

Wherein the adhesive is 20 parts of hydroxyethyl methacrylate.

Wherein the impregnating agent is 20 parts of methyl methacrylate.

A preparation of a cassava extract comprising the steps of:

s101: soaking cassava peels in water for 60 minutes, cleaning the cassava peels, and drying the cassava peels for 20 minutes in the environment of 60 ℃ of a drying furnace to enable the cassava peels to be dehydrated to 15%;

s102: crushing cassava skin into 60 meshes by crushing equipment to obtain cassava skin powder;

s103: adding 1:5 water into cassava peel powder, extracting and filtering at 80 ℃ for 60 minutes to obtain water extract, adsorbing the water extract of S102 by D101 macroporous resin, and eluting with 60% methanol to obtain eluent;

s104: and (3) concentrating and drying the eluent in the S103 in an environment of 80 ℃ until the water content is 5%, thus obtaining the cassava bark extract.

s201: preparing a certain amount of corn starch into 45% starch milk by using deionized water, and adjusting the pH value to 12 by using an ethanol water solution with the solubility of 5% when the corn starch is heated to 45 ℃ by a heating device;

s202: adding 0.4% phosphorus oxychloride into the starch dry matter, maintaining the pH value to be 12 by using 5% ethanol solution, and reacting for 4 hours;

s203: after the reaction is finished, the temperature of the solution is raised to 60 ℃, a certain amount of ferrous sulfate is added, and the pH value is adjusted to 11 by 5% ethanol solution;

s204: adding hydrogen peroxide with the concentration of 40% and the dry mass of 4% of starch, stirring for 40 minutes in an environment of 60 ℃, maintaining the pH value at 11 by using a 5% ethanol solution in the reaction process, and defoaming by using a defoaming agent;

s205: after 3 hours of reaction, stopping the oxidation reaction by using catalase, adjusting the pH value to 10, pre-pasting and drying the corn in a roller at 60 ℃, and then crushing and screening the corn by 60 meshes to obtain the gelatinized oxidized starch.

s301: 15 parts of antibacterial agent is dissolved in 360 parts of acrylic emulsion, the temperature is increased to 90 ℃, after stirring for 60 minutes, the mixture is put into an ultrasonic generating device for ultrasonic reaction, the power of the ultrasonic generating device is 50kHz, and the oscillation time is 4 hours;

s302: cooling to 25 ℃ after oscillation, adding 80 parts of compound emulsifier, continuously stirring at 10 ℃ for reaction for 3 hours through low-temperature control, heating to 25 ℃ and stirring for reaction for 5 hours, standing for 8 hours, and cleaning by using pentanediol with the concentration of 80%, thus obtaining film forming solution A;

s303: 5 parts of tea saponin, 10 parts of antistatic agent, 5 parts of sodium aluminosilicate and 5 parts of glyceryl triacetate are stirred for 3 hours in an environment of 30 ℃ by a stirring device, and then are kept stand for 40 minutes to form a solution B;

s304: heating an oily solvent containing acetone to 45 ℃ in another group of stirring devices, then adding 5 parts of cassava extract, 5 parts of corn extract, 5 parts of palm tree extract, 5 parts of fresh bamboo extract and 20 parts of adhesive simultaneously, heating the solution to 70 ℃ by an electric heating device after the addition is finished, uniformly stirring for 60 minutes, obtaining a solution C after the stirring is finished, and simultaneously cooling the solution A and the solution B to 25 ℃;

s305: and mixing the prepared film forming solution A, solution B and solution C with 20 parts of a dyeing agent and the like, and uniformly stirring to obtain the coating.

Comparative example one:

comparative example one differs from example one in that comparative example one does not contain a tapioca extract, all other things being equal.

Comparative example two:

comparative example two differs from example one in that comparative example two does not contain corn extract, all of which are identical.

Comparative example three:

comparative example three differs from example one in that comparative example three does not contain a palm extract, all of which are identical.

Comparative example four:

comparative example four differs from example one in that comparative example four does not contain nanosilver and is otherwise identical.

Comparative example five:

comparative example five differs from example one in that comparative example five does not contain chitosan, all of which are identical.

Comparative example six:

comparative example six differs from example one in that comparative example six does not contain a corn extract that was prepared by the method of the present invention, and the corn extract prepared by the conventional method is otherwise identical.

Comparative example seven:

comparative example seven differs from example one in that comparative example seven does not contain a tapioca extract which was prepared by the method of the present invention, and tapioca extracts prepared by the conventional method are all the same.

In practical application, by means of the technical scheme, the special biological-based antibacterial coating for children can be invented, the plant extract can replace petroleum derivatives in the traditional coating, the environmental pollution is reduced, meanwhile, the product of the plant extract is a renewable resource, the plant extract can be recycled, pollution damage to the environment is avoided, the plant extract does not contain formaldehyde and toxic gases emitted by benzene compounds, the plant extract emits fragrance of vegetation, meanwhile, the plant-based emulsion and other substances are adopted to cooperatively form a relatively compact surface structure, the stain resistance and the washing resistance of the coating are greatly improved, the non-added plant coating can mostly meet the I-level antibacterial and mildew-proof index requirement, so that bacteria can be effectively restrained from breeding, the indoor air quality is improved, the material is prepared from natural plants through biological or chemical conversion, does not contain harmful substances, and prevents the invasion of formaldehyde, benzene, VOC and other harmful substances from the source.

In summary, by means of the above technical scheme of the present invention, the antibacterial paint for children exclusive use of the present invention and the antibacterial paint for children exclusive use of the present invention, which do not contain the plant extracts such as the cassava extract and the corn extract, are compared with each other by brushing the indoor wall of the same spatial layout for 24 hours, and the wall a is the antibacterial paint using the traditional Chinese medicine extract which does not contain the plant extracts, and the wall B is compared with the antibacterial paint for children exclusive use of the present invention, and the wall C, the wall D, the wall E, the wall F, the wall G, the wall H, the wall I, the wall J, the wall K are respectively the antibacterial paints of the examples two, three, the examples one, two, three, four, five, six, seven, and the antibacterial paint for detecting the thallus content and formaldehyde volatile matter after the wall of the same kind of bacteria is applied for 24 hours.

The antibacterial paint for the biological-based children has obviously reduced fungus content of the wall B, the wall C and the wall D, wherein the antibacterial paint using plant extracts with different contents has obviously higher inhibition effect on various formaldehyde volatilities than the formaldehyde volatilities of the wall E, the wall F, the wall G and the wall H of the antibacterial paint respectively containing no cassava extract, corn extract and palm tree extract, and the inhibition effect on staphylococcus aureus, escherichia coli, candida albicans and saccharomycetes of the wall B, the wall C, the wall F and the wall G containing the antibacterial agent is obviously better than that of the wall H, the wall I respectively containing no nano silver and chitosan, so that the problem that the wall can not inhibit thalli is radically solved.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "configured," "connected," "secured," "screwed," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intermediaries, or in communication with each other or in interaction with each other, unless explicitly defined otherwise, the meaning of the terms described above in this application will be understood by those of ordinary skill in the art in view of the specific circumstances.

The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.

Claims

1. The special biological-based antibacterial coating for children is characterized by comprising 3-15 parts of antibacterial agent, 1-5 parts of tea saponin, 4-20 parts of plant extract, 300-360 parts of acrylic emulsion, 50-80 parts of compound emulsifier, 2-10 parts of antistatic agent, 10-20 parts of dip dyeing agent, 10-20 parts of adhesive, 1-5 parts of sodium aluminosilicate and 1-5 parts of glyceryl triacetate;

2. The special bio-based antibacterial coating for children according to claim 1, wherein the compound emulsifier comprises 25-40 parts of lauric acid monoglyceride and 25-40 parts of propylene glycol fatty acid ester.

3. The bio-based antibacterial paint special for children according to claim 2, wherein the antibacterial agent comprises 1-5 parts of nano silver, 1-5 parts of hemp fiber and 1-5 parts of chitosan.

4. The bio-based antibacterial paint special for children according to claim 3, wherein the antistatic agent comprises 1-5 parts of nano alumina and 1-5 parts of polyethylene glycol.

5. The bio-based antibacterial paint special for children according to claim 4, wherein the adhesive is 10-20 parts of hydroxyethyl methacrylate.

6. The special biological-based antibacterial coating for children, according to claim 5, wherein the dyeing agent is 10-20 parts of methyl methacrylate.

7. The bio-based antimicrobial paint for children according to claim 1, wherein the preparation of the cassava extract comprises the following steps:

8. The bio-based antimicrobial paint for children according to claim 1, wherein the preparation of the corn extract comprises the steps of:

9. A method for preparing the bio-based antibacterial paint special for children, which is characterized by comprising the following steps:

s304: heating an oily solvent containing acetone to 35-45 ℃ in another group of stirring devices, then simultaneously adding 1-5 parts of cassava extract, 1-5 parts of corn extract, 1-5 parts of palm tree extract, 1-5 parts of fresh bamboo extract and 10-20 parts of adhesive, heating the solution to 40-70 ℃ by an electric heating device after the addition of the adhesive is finished, uniformly stirring for 40-60 minutes, obtaining a solution C after the stirring is finished, and simultaneously cooling the solution A and the solution B to 15-25 ℃;