CN109575728B - Environment-friendly interior wall coating and preparation method thereof - Google Patents
Environment-friendly interior wall coating and preparation method thereof Download PDFInfo
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Abstract
The invention discloses an environment-friendly interior wall coating and a preparation method thereof. The environment-friendly interior wall coating comprises the following components in parts by weight: 45-75 parts of modified shell powder, 15-20 parts of tourmaline powder, 5-10 parts of diatomite, 5-10 parts of hydroxypropyl methyl cellulose, 1-5 parts of defoaming agent, 1-3 parts of dispersing agent, 2-6 parts of thixotropic agent, 1-2 parts of titanium dioxide, 2-5 parts of calcined kaolin, 1-5 parts of hollow glass microsphere, 1-5 parts of film-forming assistant, 15-20 parts of nano titanium dioxide, 20-30 parts of organic silicon modified acrylic emulsion, 5-10 parts of ethylene-vinyl acetate copolymer and 80-100 parts of deionized water; the preparation method comprises the following steps: s1, dispersing cellulose; s2, mixing and grinding the raw materials; s3, adding ingredients; and S4, preparing a finished product. The environment-friendly interior wall coating disclosed by the invention has the advantages of non-volatile harmful gases, capability of adsorbing and degrading harmful gases such as formaldehyde and the like, greenness and environmental friendliness.
Description
Technical Field
The invention relates to the technical field of coatings, in particular to an environment-friendly interior wall coating and a preparation method thereof.
Background
The water-based latex paint for the interior wall is a necessary material for home decoration, the requirement on the interior wall latex paint for decoration is higher and higher along with the enhancement of the environmental awareness of people at present, the polyvinyl formal paint with higher formaldehyde release ratio is gradually eliminated, various environment-friendly interior wall paints with negative ions and low VOC are used more and more, the health and the environmental protection are further developed, and the problem that how to develop the environment-friendly green paint is increasingly concerned by people is solved. Particularly, in recent years, with the improvement of living standard of people, living conditions are improved continuously, and the problem of environmental pollution caused by decoration pollution is gradually emphasized. The national departments set a series of standards related to indoor environment in turn, and control is carried out from building decoration materials to indoor air quality and the like.
Indoor environmental pollution is the most serious after new house decoration, the most common chemical pollution gases after new house decoration comprise formaldehyde, benzene series, ammonia gas, radon gas, volatile organic compounds and the like, and the five toxic gases and harmful substances are called as '5 big invisible killers' in room decoration. Wherein formaldehyde is carcinogen and has been listed as the carcinogen in ChinaAnd (4) detecting items forcibly executed by the architectural decoration engineering. Different national standards have different regulations on the standard-reaching concentration of formaldehyde, and the standard-reaching concentration of the formaldehyde in the room is 0.10mg/m according to the regulation of indoor air quality standard GB/T18883-20023GB50325-2001 stipulates that the standard formaldehyde concentration of a civil building is 0.08mg/m3The formaldehyde standard concentration of the second type civil buildings is 0.12mg/m3. Formaldehyde has serious harm to human bodies, causes non-negligible influence on human health after long-term exposure to low-concentration or high-concentration formaldehyde, stimulates mucous membranes and skin, causes liver and lung function and immune function abnormality, and can cause carcinogenesis and gene mutation when serious.
In the prior art, a chinese patent application with application number CN201710983248.8 discloses an environment-friendly waterproof paint for indoor wall surface, which is composed of the following components in parts by weight: 30-40 parts of a hydrogenated C5 petroleum resin and paraffin wax composite emulsifier, 8-18 parts of calcite powder, 4-12 parts of shell powder, 1-2.3 parts of aminopropylamine dioleate, 1.2-2.2 parts of propylene glycol ether, 0.2-1 part of polydimethylsiloxane, and 20-35 parts of water; wherein the weight ratio of the hydrogenated C5 petroleum resin to the paraffin is 1: 1-1.3: 1.
The existing environment-friendly indoor waterproof coating has good waterproof function due to less volatilization of harmful substances, but has no adsorption and degradation functions on harmful gases such as formaldehyde released by indoor furniture or other decorations.
Disclosure of Invention
Aiming at the defects in the prior art, the first purpose of the invention is to provide an environment-friendly interior wall coating which has the advantages of less volatilization of harmful gases, capability of adsorbing and degrading harmful gases such as formaldehyde and the like, greenness and environmental protection.
The second purpose of the invention is to provide a preparation method of the environment-friendly interior wall coating, which has the advantages of high dispersion degree of the prepared coating, and stronger adhesion to interior walls and capability of covering fine cracks.
In order to achieve the first object, the invention provides the following technical scheme: the environment-friendly interior wall coating is characterized by comprising the following components in parts by weight: 45-75 parts of modified shell powder, 15-20 parts of tourmaline powder, 5-10 parts of diatomite, 5-10 parts of hydroxypropyl methyl cellulose, 1-5 parts of defoaming agent, 1-3 parts of dispersing agent, 2-6 parts of thixotropic agent, 1-2 parts of titanium dioxide, 2-5 parts of calcined kaolin, 1-5 parts of hollow glass microspheres, 1-5 parts of film-forming assistant, 15-20 parts of nano titanium dioxide, 20-30 parts of organic silicon modified acrylic emulsion, 5-10 parts of ethylene-vinyl acetate copolymer and 80-100 parts of deionized water.
By adopting the technical scheme, the coating prepared by adding the modified shell powder, the hollow glass beads, the tourmaline powder, the nano titanium dioxide and the like into the deionized water has an excellent formaldehyde removing function, the modified shell powder can adsorb and decompose formaldehyde, purify air and eliminate peculiar smell, and simultaneously has antibacterial and bacteriostatic effects, can adjust air humidity and has a unique water breathing function, the interior wall coating has antistatic, fireproof and flame-retardant effects by using the modified shell powder, the tourmaline, the calcined kaolin and the like, the calcined kaolin can also improve the contrast ratio of a coating film, improve the washing resistance and the pollution resistance, and the interior wall is kept clean under the combined action of titanium dioxide and can be prevented from yellowing and fouling; the diatomite can improve the physical and chemical properties of the coating, improve the durability and weather resistance, enhance the expansion capability of the coating, reduce cracks and oil absorption, and enhance the corrosion resistance, and meanwhile, the diatomite and the calcined kaolin have porous structures, have better air permeability after a coating is dried, and can adsorb harmful substances in the air; the defoaming agent can reduce the surface tension of the liquid to break bubbles, so that the coating is uniform in texture, the surface of the formed coating is smooth and has no air holes, and the dispersing agent can prevent solid particles from settling and condensing to form agglomerates in the coating to influence the quality of the coating; the environment-friendly interior wall coating disclosed by the invention is prepared from raw materials which do not contain APEO, volatile organic compounds and formaldehyde, the volatilization of harmful gases such as formaldehyde and the like is reduced from the source, and meanwhile, the environment-friendly interior wall coating can adsorb and degrade the formaldehyde, so that the effect of environment protection is achieved.
Further, the components in parts by weight are as follows: 55-65 parts of modified shell powder, 17-19 parts of tourmaline powder, 7-9 parts of diatomite, 6-8 parts of hydroxypropyl methyl cellulose, 3-4 parts of defoaming agent, 1.8-2.4 parts of dispersing agent, 3-4 parts of thixotropic agent, 1.4-1.8 parts of titanium dioxide, 3-4 parts of calcined kaolin, 2-4 parts of hollow glass microsphere, 2-4 parts of film-forming auxiliary agent, 17-19 parts of nano titanium dioxide, 24-28 parts of organic silicon modified acrylic emulsion, 7-9 parts of ethylene-vinyl acetate copolymer and 85-95 parts of deionized water.
By adopting the technical scheme, the use amount of each component in the raw materials is more accurate, so that the waste of each raw material can be avoided, and the cost is saved.
Further, the modified shell powder comprises the following components in parts by weight: 10-20 parts of shell, 100-150 parts of sodium hydroxide solution with the mass fraction of 4-8%, 80-100 parts of distilled water, 5-10 parts of polyethylene glycol, 30-50 parts of absolute ethyl alcohol and 5-10 parts of
Zinc stearate, 10-25 parts of silver nitrate solution with the mass fraction of 1-2% and 5-10 parts of 2-amino-2-methyl-1-propanol.
Through adopting above-mentioned technical scheme, use zinc stearate and silver nitrate solution to carry out the wet process modification to the shell, calcium ion etc. in the shell easily react with the carboxyl in the zinc stearate and generate calcium stearate, cover on the surface of shell powder granule, make the shell powder become lipophilic by hydrophilicity, use silver nitrate solution with silver ion load on the shell powder surface, when containing formaldehyde in the indoor air, silver ion can take place to react with formaldehyde, formaldehyde turns into carbon dioxide and water, when indoor when containing ammonia, silver ion can form silver ammonia complex ion with ammonia, thereby eliminate ammonia, and silver ion has good bactericidal action, can prevent because of humidity is higher on the wall of interior wall, breed the bacterium.
Further, the preparation method of the modified shell powder comprises the following steps: (1) soaking the shell in sodium hydroxide solution for 18-28h, ultrasonically cleaning for multiple times, drying in an oven at 100-130 deg.C for 20-24h, taking out, grinding, and sieving with 100 mesh sieve to obtain shell powder;
(2) adding distilled water and polyethylene glycol into shell powder, ultrasonically oscillating, dispersing, heating in water bath to 95-100 deg.C, adding zinc stearate, mixing and stirring for 1.5-2 hr, vacuum filtering, washing with anhydrous ethanol, and vacuum filtering;
(3) and (3) adding a silver nitrate solution into the product obtained in the step (2), controlling the solid-to-liquid ratio to be 1:6-8, stirring for 3-4h, adjusting the pH value to be 7.5-8 by using 2-amino-2-methyl-1-propanol, filtering, and drying to obtain the modified shell powder.
According to the technical scheme, firstly, impurities and dirt on the surface of the shell are removed by using a sodium hydroxide solution to prepare shell powder, the shell powder is modified by using zinc stearate, the modification temperature and the modification time are controlled, so that the zinc stearate is dissolved more completely, the surface of the shell powder is wrapped more uniformly, and 2-amino-2-methyl-1-propanol is used as an acid-base regulator to regulate the pH value in the system, so that the coating system keeps slightly alkaline, the stability of the coating is kept, the reaggregation or sedimentation and precipitation of the coating are reduced, the coating is stable in property, and the coating has excellent safety and non-toxic performance.
Further, in the step (1), the shell grinding time is 10-12h, the grinding medium is zirconia balls, the ball-to-material ratio is 4-6:1, and the rotating speed of the ball mill is 30-40 r/min.
By adopting the technical scheme, the shells are ground by using the zirconium oxide as the grinding balls and controlling the ball-to-material ratio to be 4-6:1, so that the shells can be ground more finely and uniformly.
Further, the dispersing agent is one or a combination of sodium polyphosphate, sodium pyrophosphate and sodium dodecyl sulfate.
By adopting the technical scheme, the average particle size of the tourmaline powder can be gradually reduced along with the addition of the dispersing agent, which is beneficial to the mutual dispersion of all components and the dispersion of the tourmaline powder in a copolymerization system, and prevents the sedimentation and agglomeration of solid particles.
Furthermore, the particle size of the hollow glass bead is 10-20 μm, and the wall thickness is 1-2 μm.
By adopting the technical scheme, the hollow glass beads with the particle size of 10-20 mu m are used, so that the corrosion resistance, fire resistance, sound insulation and antifouling performance of the coating can be improved, the internal stress of the coating can be eliminated, the dimensional stability is ensured, the cracking and separation of the coating caused by thermal expansion and cold contraction are reduced, the impact resistance of the coating is improved, and the VOC value can be reduced.
Further, the thixotropic agent is magnesium aluminum silicate.
By adopting the technical scheme, the aluminum magnesium silicate is used as the thixotropic agent, so that the thickening effect is obvious, the raw materials are prevented from settling, the coating is prevented from layering, and the phenomenon of syneresis can be improved.
Further, the film-forming auxiliary agent comprises 2, 2, 4-trimethyl-1, 3-pentanediol monoisobutyrate, a dry film mildew preventive and dodecyl phenol polyoxyethylene ether in a mass ratio of 3:1-2: 2-3.
By adopting the technical scheme, the 2, 2, 4-trimethyl-1, 3-pentanediol monoisobutyrate can promote the plastic flow and elastic deformation of each component, improve the coalescence performance, and achieve the optimal improvement performance when being compounded with the dodecyl phenol polyoxyethylene ether for use; when the 2, 2, 4-trimethyl-1, 3-pentanediol monoisobutyrate and the dry film mildew preventive are compounded for use, a synergistic effect is generated, the formed coating film is excellent in continuity, the coalescence property and the weather resistance of slurry are improved, and the coating film is good in storage stability.
In order to achieve the second object, the invention provides the following technical scheme: a preparation method of an environment-friendly interior wall coating comprises the following steps:
s1, cellulose dispersion: weighing deionized water, placing the deionized water into a reactor, heating the deionized water to 50-70 ℃, adding hydroxypropyl methyl cellulose and modified shell powder, stirring the mixture at the rotating speed of 400-500r/min until the cellulose is fully dissolved to form a uniform solution, and cooling the uniform solution to room temperature;
s2, mixing and grinding raw materials: adding tourmaline powder, diatomite, calcined kaolin, titanium dioxide, nano titanium dioxide and thixotropic agent into the solution formed in the step S1, controlling the rotating speed to be 1500-3000 r/min under the condition of water cooling, dispersing at a high speed for 5-10min, and grinding at a high speed of 2500-3000r/min after dispersing uniformly to ensure that the fineness reaches 50 mu m;
s3, adding ingredients: then adding the defoaming agent, the dispersing agent, the organic silicon modified acrylic emulsion, the film forming auxiliary agent and the ethylene-vinyl acetate copolymer at the rotating speed of 1000-1500r/min, and stirring for 10-15 min;
s4, preparing a finished product: and finally adding the hollow glass beads, and fully stirring for 10-20min to obtain a finished product.
By adopting the technical scheme, firstly, the hydroxypropyl methyl cellulose is dissolved and dispersed, the hydroxypropyl methyl cellulose is prevented from generating static electricity and strong adsorption, and the modified shell powder and the hydroxypropyl methyl cellulose are firstly added, so that the shell powder modified by the zinc stearate can prevent the hydroxypropyl methyl cellulose from agglomerating, and the cellulose dispersion is facilitated.
In conclusion, the invention has the following beneficial effects:
firstly, because the modified shell powder, the tourmaline powder and other substances without harmful gas volatilization are used as raw materials for preparing the interior wall coating, the modified shell powder has excellent formaldehyde elimination and sterilization effects, and the tourmaline powder can continuously release negative ions, so that indoor formaldehyde is eliminated, the obtained interior wall coating is less in harmful gas volatilization, can absorb and degrade harmful gases such as formaldehyde and the like, and is green and environment-friendly;
secondly, preferably, zinc stearate and a silver nitrate solution are adopted to modify the shell powder, firstly, hydroxyl in the zinc stearate reacts with calcium ions in the shell powder, so that the zinc stearate covers the surface of the shell powder, the hydrophilicity of the shell powder is converted into lipophilicity, and then the loaded silver ions are loaded on the shell powder, so that the shell powder has excellent capability of eliminating harmful gases such as formaldehyde and the like and has the performance of sterilization and disinfection;
thirdly, in the invention, 2, 2, 4-trimethyl-1, 3-pentanediol monoisobutyrate, a dry film mildew preventive and dodecyl phenol polyoxyethylene ether are preferably used as film forming aids, and the 2, 2, 4-trimethyl-1, 3-pentanediol monoisobutyrate can promote plastic flow and elastic deformation of each component, improve coalescence performance, and achieve optimal improvement performance when being compounded with the dodecyl phenol polyoxyethylene ether; when 2, 2, 4-trimethyl-1, 3-pentanediol monoisobutyrate and a dry film mildew inhibitor are compounded for use, a synergistic effect is generated, the formed coating film has excellent continuity, the coalescence property and the weather resistance of slurry are improved, and the coating film has good storage stability; fourthly, the aluminum magnesium silicate is used as a thixotropic agent, has an obvious thickening effect, prevents raw materials from settling to cause coating layering, and can improve the phenomenon of coating syneresis;
fifthly, in the method, the modified shell powder and the hydroxypropyl methyl cellulose are added firstly, so that static electricity and strong adsorption of the hydroxypropyl methyl cellulose can be prevented, and the modified shell powder and the hydroxypropyl methyl cellulose are added firstly, so that the shell powder modified by the zinc stearate can prevent the hydroxypropyl methyl cellulose from agglomerating, and the cellulose dispersion is facilitated.
Detailed Description
The present invention will be described in further detail with reference to examples.
Preparation example of modified shell powder in the following preparation examples, the shell is selected from clam shell, fresh oyster shell or clam shell.
Preparation example 1: (1) according to the mixture ratio in the table 1, 10 kg of shells are soaked in 100 kg of sodium hydroxide solution with the mass fraction of 4% for 18h, are subjected to ultrasonic cleaning for multiple times, are placed in an oven, are dried for 20h at 100 ℃, are taken out and are ground, and are sieved by a 100-mesh sieve to prepare shell powder; the ultrasonic cleaning frequency is 25kHz, the single cleaning time is 5min, the grinding time is 10h, the grinding medium is zirconia balls, the ball-material ratio is 4:1, and the rotating speed of the ball mill is 30 r/min;
(2) taking shell powder, adding 80 kg of distilled water and 5 kg of polyethylene glycol, carrying out ultrasonic oscillation dispersion, heating in a water bath to 95 ℃, adding 5 kg of zinc stearate, mixing and stirring for 1.5h, carrying out suction filtration, washing with 30 kg of absolute ethyl alcohol, and carrying out suction filtration; wherein the ultrasonic oscillation frequency is 40kHz, and the oscillation time is 20 min;
(3) and (3) adding 10 kg of silver nitrate solution into the product obtained in the step (2), controlling the solid-to-liquid ratio to be 1:6, stirring for 3h, adjusting the pH value to be 7.5 by using 5 kg of 2-amino-2-methyl-1-propanol, filtering and drying to obtain the modified shell powder.
Preparation example 2: (1) soaking 15 kg of shell in 125 kg of 6% sodium hydroxide solution according to the proportion in Table 1 for 25h, ultrasonically cleaning for multiple times, drying in an oven at 115 ℃ for 22h, taking out, grinding, and sieving with a 100-mesh sieve to obtain shell powder; the ultrasonic cleaning frequency is 35kHz, the single cleaning time is 8min, the grinding time is 11h, the grinding medium is zirconia balls, the ball-material ratio is 5:1, and the rotating speed of the ball mill is 35 r/min;
(2) taking shell powder, adding 90 kg of distilled water and 8 kg of polyethylene glycol, carrying out ultrasonic oscillation dispersion, heating in a water bath to 98 ℃, adding 8 kg of zinc stearate, mixing and stirring for 1.8h, carrying out suction filtration, washing with 40 kg of absolute ethyl alcohol, and carrying out suction filtration; wherein the ultrasonic oscillation frequency is 45kHz, and the oscillation time is 25 min;
(3) and (3) adding 17 kg of silver nitrate solution into the product obtained in the step (2), controlling the solid-to-liquid ratio to be 1:7, stirring for 3.5h, adjusting the pH value to be 7.8 by using 8 kg of 2-amino-2-methyl-1-propanol, filtering, and drying to obtain the modified shell powder.
Preparation example 3: (1) according to the mixture ratio in the table 1, 20 kg of shells are soaked in 150 kg of sodium hydroxide solution with the mass fraction of 8% for 28h, are subjected to ultrasonic cleaning for multiple times, are placed in a drying oven, are dried for 24h at 130 ℃, are taken out and are ground, and are sieved by a 100-mesh sieve to prepare shell powder; the ultrasonic cleaning frequency is 40kHz, the single cleaning time is 10min, the grinding time is 12h, the grinding medium is zirconia balls, the ball-material ratio is 6:1, and the rotating speed of the ball mill is 40 r/min;
(2) taking shell powder, adding 100 kg of distilled water and 10 kg of polyethylene glycol, carrying out ultrasonic oscillation dispersion, heating in a water bath to 100 ℃, adding 10 kg of zinc stearate, mixing and stirring for 2h, carrying out suction filtration, washing with 50 kg of absolute ethyl alcohol, and carrying out suction filtration; wherein the ultrasonic oscillation frequency is 50kHz, and the oscillation time is 30 min;
(3) and (3) adding 25 kg of silver nitrate solution into the product obtained in the step (2), controlling the solid-to-liquid ratio to be 1:8, stirring for 4h, adjusting the pH value to be 8 by using 10 kg of 2-amino-2-methyl-1-propanol, filtering and drying to obtain the modified shell powder.
TABLE 1 raw material compounding ratio of modified Shell powder in preparation examples 1 to 3
Examples
In the following examples, the tourmaline powder is white tourmaline powder with 325 meshes in a Guizhou Peng mineral product processing factory, the diatomite is Sailite Celite499 diatomite, the calcined kaolin is selected from calcined kaolin with 325 meshes in a Guizhou Quanfeng mineral product processing factory in the Guizhou county, the titanium dioxide is selected from DTA-102 Toutai anatase titanium dioxide of Tooming chemical industry Co., Ltd, the organosilicon modified acrylic emulsion is selected from EA2031S organosilicon modified acrylic emulsion of Jiangsu Sanmu group Co., Ltd, the ethylene-vinyl acetate copolymer is selected from Celvolite 1491 emulsion, the dry film mildew inhibitor is selected from blue peak assistant Co., Ltd, the dry film mildew inhibitor is LF-20, the high-carbon alcohol defoamer is selected from HC-23/24/25 produced by Jingyu environmental protection science Co., Ltd, and each component can also adopt similar products.
Example 1: a preparation method of an environment-friendly interior wall coating comprises the following steps:
s1, cellulose dispersion: weighing 80 kg of deionized water according to the proportion in the table 2, putting the deionized water into a reactor, heating the deionized water to 50 ℃, adding 5 kg of hydroxypropyl methyl cellulose and 45 kg of modified shell powder, stirring the mixture at the rotating speed of 400r/min until the cellulose is fully dissolved to form a uniform solution, and cooling the uniform solution to room temperature; wherein the modified shell powder is prepared by the preparation example 1;
s2, mixing and grinding raw materials: adding 15 kg of tourmaline powder, 5 kg of diatomite, 2 kg of calcined kaolin, 1 kg of titanium dioxide, 15 kg of nano titanium dioxide and 2 kg of magnesium aluminum silicate into the solution formed in the step S1, controlling the rotating speed to be 1500r/min under the condition of water cooling, dispersing at a high speed for 5min, and grinding at a high speed of 2500r/min after even dispersion to ensure that the fineness reaches 50 mu m;
s3, adding ingredients: then adding 1 kg of defoaming agent, 1 kg of dispersing agent, 20 kg of organic silicon modified acrylic emulsion, 1 kg of film forming additive and 5 kg of ethylene-vinyl acetate copolymer at the rotating speed of 1000r/min, and stirring for 10 min; the dispersing agent is sodium polyphosphate, the defoaming agent is a high-carbon alcohol defoaming agent, and the film-forming auxiliary agent is 2, 2, 4-trimethyl-1, 3-pentanediol monoisobutyrate, a dry film mildew preventive and dodecyl phenol polyoxyethylene ether in a mass ratio of 3:1: 2;
s4, preparing a finished product: and finally, adding 1 kg of hollow glass beads, and fully stirring for 10min to obtain a finished product, wherein the particle size of the hollow glass beads is 10 mu m, and the wall thickness is 1 mu m.
TABLE 2 raw material ratios of environment-friendly interior wall coatings in examples 1 to 4
Example 2: the preparation method of the environment-friendly interior wall coating is different from the preparation method of the embodiment 1 in that the temperature of a reactor in the step S1 is 55 ℃, the stirring speed is 440r/min, and the modified shell powder is prepared by the preparation method of the embodiment 2; in the step S2, the stirring speed is 1600r/min, the dispersion is carried out for 7min at a high speed, and after the dispersion is uniform, the high-speed grinding is carried out at the rotating speed of 2700r/min, so that the fineness reaches 50 μm; in the step S3, the stirring speed is 1300 r/min; in the step S4, stirring for 13min, wherein the dispersant is sodium pyrophosphate; in step S4, the stirring time is 13min, the particle size of the hollow glass bead is 14 μm, and the wall thickness is 1.4 μm.
Example 3: the preparation method of the environment-friendly interior wall coating is different from the preparation method of the embodiment 1 in that the temperature of a reactor in the step S1 is 65 ℃, the stirring speed is 480r/min, and the modified shell powder is prepared by the preparation method of the embodiment 3; in the step S2, the stirring speed is 1800r/min, the dispersion is carried out for 7min at a high speed, and after the dispersion is uniform, the high-speed grinding is carried out at the rotating speed of 2900r/min, so that the fineness reaches 50 mu m; in the step S3, the stirring speed is 1400 r/min; in the step S4, stirring for 14min, wherein the dispersing agent is sodium dodecyl sulfate; in step S4, the stirring time is 17min, the particle size of the hollow glass bead is 18 μm, and the wall thickness is 1.8 μm.
Example 4: a preparation method of an environment-friendly interior wall coating is different from that of the embodiment 1 in that the temperature of a reactor in the step S1 is 70 ℃, and the stirring speed is 500 r/min; in the step S2, the stirring speed is 2000r/min, the dispersion is carried out for 10min at a high speed, and after the dispersion is uniform, the high-speed grinding is carried out at the rotating speed of 3000r/min, so that the fineness reaches 50 mu m; in the step S3, the stirring speed is 1500 r/min; in the step S4, stirring for 15min, wherein the dispersant is sodium pyrophosphate; in step S4, the stirring time is 20min, the particle size of the hollow glass bead is 20 μm, and the wall thickness is 2 μm.
Example 5: the preparation method of the environment-friendly interior wall coating is different from that of example 1 in that the film-forming auxiliary agent comprises 2, 2, 4-trimethyl-1, 3-pentanediol monoisobutyrate, a dry film mildew preventive and dodecyl phenol polyoxyethylene ether in a mass ratio of 3:1.5: 2.5.
Example 6: the preparation method of the environment-friendly interior wall coating is different from that of example 1 in that the film-forming auxiliary agent comprises 2, 2, 4-trimethyl-1, 3-pentanediol monoisobutyrate, a dry film mildew preventive and dodecyl phenol polyoxyethylene ether in a mass ratio of 3:2: 3.
Comparative example
Comparative example 1: the preparation method of the environment-friendly interior wall coating is different from the preparation method of the embodiment 1 in that the raw materials of the environment-friendly interior wall coating are prepared by replacing modified shell powder with shell powder.
Comparative example 2: the preparation method of the environment-friendly interior wall coating is different from the preparation method of the embodiment 1 in that tourmaline powder is not added in the raw materials of the environment-friendly interior wall coating.
Comparative example 3: the preparation method of the environment-friendly interior wall coating is different from the preparation method of the embodiment 1 in that shells are used for replacing modified shell powder in raw materials of the environment-friendly interior wall coating, and tourmaline powder is not added.
Comparative example 4: the preparation method of the environment-friendly interior wall coating is different from the preparation method of the embodiment 1 in that hollow glass beads are not added in the raw materials of the environment-friendly interior wall coating.
Comparative example 5: the preparation method of the environment-friendly interior wall coating is different from that of example 1 in that the film-forming auxiliary agent comprises 2, 2, 4-trimethyl-1, 3-pentanediol monoisobutyrate, a dry film mildew preventive and dodecyl phenol polyoxyethylene ether in a mass ratio of 3:0.5: 1.5.
Comparative example 6: the preparation method of the environment-friendly interior wall coating is different from that of example 1 in that the film-forming auxiliary agent comprises 2, 2, 4-trimethyl-1, 3-pentanediol monoisobutyrate, a dry film mildew preventive and dodecyl phenol polyoxyethylene ether in a mass ratio of 3:2.5: 3.5.
Comparative example 7: the preparation method of the environment-friendly interior wall coating is different from the preparation method of the embodiment 1 in that magnesium aluminum silicate is not added in the raw materials of the environment-friendly interior wall coating.
Performance test
1. And (3) detecting the performance of the environment-friendly interior wall coating: an environmentally friendly interior wall coating was prepared according to the methods in examples 1-6 and comparative examples 1-7, and the following properties were tested according to the requirements of superior products in GB/T9756-2001, the national Standard full of interior wall coatings: (1) a state in the vessel; (2) construction performance; (3) low temperature stability; (4) drying time (tack-free); (5) coating film appearance; (6) contrast ratio (white and light): (7) water resistance; (8) scrub resistance, the results of the test on the interior wall coatings prepared according to examples 1 to 6 are shown in Table 3, and the results of the test on the interior wall coatings prepared according to comparative examples 1 to 6 are shown in Table 4.
TABLE 3 Performance test results of the eco-friendly interior wall coatings prepared according to examples 1 to 6
As can be seen from the data in Table 3, the environmentally friendly interior wall coatings prepared according to the methods of examples 1 to 6 have uniform texture, no hard lumps in the container, no delamination, good workability, no deterioration at low temperature, normal coating, fast drying time, high water resistance, no abnormality within 24 hours, and high washing and brushing resistance.
TABLE 4 Performance test results of the eco-friendly interior wall coatings prepared according to the methods of comparative examples 1 to 6
As can be seen from the data in Table 4, the absence of the modified shell powder in comparative example 1 results in longer drying time than the coatings prepared in examples 1-6, and although the number of times of washing resistance exceeds the standard value of the first-class product in GB/T9756-2001, national Standard of interior wall coating, the number of times of washing resistance is less than that in examples 1-6; comparative example 2 and comparative example 3, in which tourmaline powder was not added, were respectively used, the coating prepared in comparative example 2 was less in the number of times of washing resistance compared to example 1, the coating prepared in comparative example 4 was not added with hollow glass beads, resulting in poor alkali resistance of the coating, and the phenomena of bubbling, dusting, and discoloration occurred within 24 hours, comparative example 5 was a coating forming agent containing a dry film fungicide and dodecylphenol polyoxyethylene ether in a smaller amount than 2, 2, 4-trimethyl-1, 3-pentanediol monoisobutyrate, comparative example 6 was a coating forming agent containing a dry film fungicide and dodecylphenol polyoxyethylene 2 ether, phase 2 was higher than 4-trimethyl-1, 3-pentanediol monoisobutyrate, resulting in the phenomena of pinholes and sagging after the environmentally friendly interior wall coating was applied to a wall, and comparative example 7 was a coating prepared without using a thixotropic agent, causing the coating to delaminate and there are hard lumps within the coating.
2. Testing the volatilization amount of harmful gases of the environment-friendly interior wall coating: the environmentally friendly interior wall coating was prepared according to the methods of examples 1 to 6 and comparative examples 1 to 7, applied to a room of the same volume, the door and window were closed, and the content of harmful gases in the room was measured after one week, the measurement method was carried out according to the measurement method specified in GB/T18883-2002 "indoor air quality standard", and the concentration value specified therein was used as the measurement standard value, wherein the 1-hour mean value of all substances except for the total volatile organic compound TVOC was used as the mean value of 8 hours, and the measurement results are shown in table 5, in which "ND" indicates no measurement.
TABLE 5 harmful gas volatilization amounts of the coatings prepared in examples 1 to 6 and comparative examples 1 to 7
As can be seen from the data in table 5, after the environmental-friendly interior wall coating prepared in examples 1 to 6 is painted indoors, the modified shell powder can adsorb and decompose formaldehyde, so that the indoor formaldehyde content is low, harmful gases such as toluene, xylene and benzene are not contained, the amounts of carbon monoxide and total volatile organic compound TVOC are low, and in comparative example 1, the shell powder can adsorb formaldehyde but has a poorer effect than the modified shell powder, the indoor formaldehyde content is higher, and the amount of other polluting gases is more than that of the other polluting gases due to the use of the shell powder instead of the modified shell powder; in the comparative example 2, formaldehyde cannot be degraded due to no addition of tourmaline powder, so that the volatilization amount of various pollutants is high; in the comparative example 4, the volatilization of formaldehyde and various organic matters is not affected because the hollow glass beads are not added; comparative example 5 in comparative example 6, the content of the dry film mildew preventive and the content of the dodecylphenol polyoxyethylene ether in the film-forming assistant are different from those in examples 1 to 6, but the content of volatile pollution gas is not influenced, and the content of formaldehyde and other polluting substances is not influenced because the thixotropic agent is not contained in comparative example 7.
3. The performance test of the environment-friendly interior wall coating on the air purification effect is as follows: the interior wall coating for environmental protection was prepared according to the methods of examples 1 to 6 and comparative examples 1 to 7, and the formaldehyde purification rate and the durability of the formaldehyde purification effect were measured according to the requirements of class II materials in JVT1074-2008 "indoor air purification function coating material purification performance", and the test results are shown in table 6.
TABLE 6 test results of formaldehyde purification rates of the coatings in examples 1 to 6 and comparative examples 1 to 7
As can be seen from the data in table 6, the environment-friendly interior wall coating prepared by the methods in examples 1 to 6 has good formaldehyde and toluene purification rates and purification durability, while the shell powder is used in place of the modified shell powder in comparative example 1, the formaldehyde and toluene purification rates and purification durability of the coating prepared in comparative example 1 are poor, the formaldehyde and toluene adsorption effect of the shell powder is not good, the formaldehyde and toluene adsorption effect of the coating prepared in comparative example 1 is not good, and the purification rate and purification durability obtained by testing are lower than the detection standard value of the class II material in JVT1074-2008 "indoor air purification function coating material purification performance", which indicates that the formaldehyde and toluene purification effect of the interior wall coating can be improved by the modified shell powder; in the comparative example 2, tourmaline powder is not added, the coating cannot continuously release negative ions indoors, and the purification effect of formaldehyde and toluene is poor, which shows that the tourmaline powder can improve the purification rate of the interior wall coating to formaldehyde and toluene; compared example 4 does not add hollow glass beads, and does not affect the formaldehyde and toluene purification effect of the coating, compared example 5 has poor formaldehyde and toluene purification effect because the content of the dry film mildew preventive and the content of the dodecylphenol polyoxyethylene ether in the film-forming assistant are low, compared example 6 has high content of the dry film mildew preventive and the content of the dodecylphenol polyoxyethylene ether, and compared example 7 does not add a thixotropic agent, and does not affect the formaldehyde and toluene purification capability of the coating.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Claims (6)
1. A preparation method of an environment-friendly interior wall coating is characterized by comprising the following steps:
s1, cellulose dispersion: weighing deionized water, placing the deionized water into a reactor, heating the deionized water to 50-70 ℃, adding hydroxypropyl methyl cellulose and modified shell powder, stirring the mixture at the rotating speed of 400-500r/min until the cellulose is fully dissolved to form a uniform solution, and cooling the uniform solution to room temperature;
s2, mixing and grinding raw materials: adding tourmaline powder, diatomite, calcined kaolin, titanium dioxide, nano titanium dioxide and thixotropic agent into the solution formed in the step S1, controlling the rotating speed to be 1500-3000 r/min under the condition of water cooling, dispersing at a high speed for 5-10min, and grinding at a high speed of 2500-3000r/min after dispersing uniformly to ensure that the fineness reaches 50 mu m;
s3, adding ingredients: then adding the defoaming agent, the dispersing agent, the organic silicon modified acrylic emulsion, the film forming auxiliary agent and the ethylene-vinyl acetate copolymer at the rotating speed of 1000-1500r/min, and stirring for 10-15 min;
s4, preparing a finished product: finally adding hollow glass beads, and fully stirring for 10-20min to obtain a finished product;
the weight parts of the components are as follows: 45-75 parts of modified shell powder, 15-20 parts of tourmaline powder, 5-10 parts of diatomite, 5-10 parts of hydroxypropyl methyl cellulose, 1-5 parts of defoaming agent, 1-3 parts of dispersing agent, 2-6 parts of thixotropic agent, 1-2 parts of titanium dioxide, 2-5 parts of calcined kaolin, 1-5 parts of hollow glass microspheres with the particle size of 10-20 mu m and the wall thickness of 1-2 mu m, 1-5 parts of film-forming auxiliary agent, 15-20 parts of nano titanium dioxide, 20-30 parts of organic silicon modified acrylic emulsion, 5-10 parts of ethylene-vinyl acetate copolymer and 80-100 parts of deionized water;
the modified shell powder comprises the following components in parts by weight: 10-20 parts of shell, 100 parts of sodium hydroxide solution with the mass fraction of 4-8%, 80-100 parts of distilled water, 5-10 parts of polyethylene glycol, 30-50 parts of absolute ethyl alcohol, 5-10 parts of zinc stearate, 10-25 parts of silver nitrate solution with the mass fraction of 1-2% and 5-10 parts of 2-amino-2-methyl-1-propanol;
the preparation method of the modified shell powder comprises the following steps:
(1) soaking the shell in sodium hydroxide solution for 18-28h, ultrasonically cleaning for multiple times, drying in an oven at 100-130 deg.C for 20-24h, taking out, grinding, and sieving with 100 mesh sieve to obtain shell powder;
(2) adding distilled water and polyethylene glycol into shell powder, ultrasonically oscillating, dispersing, heating in water bath to 95-100 deg.C, adding zinc stearate, mixing and stirring for 1.5-2 hr, vacuum filtering, washing with anhydrous ethanol, and vacuum filtering;
(3) and (3) adding a silver nitrate solution into the product obtained in the step (2), controlling the solid-to-liquid ratio to be 1:6-8, stirring for 3-4h, adjusting the pH value to be 7.5-8 by using 2-amino-2-methyl-1-propanol, filtering, and drying to obtain the modified shell powder.
2. The preparation method of the environment-friendly interior wall coating according to claim 1, wherein the environment-friendly interior wall coating comprises the following components in parts by weight: 55-65 parts of modified shell powder, 17-19 parts of tourmaline powder, 7-9 parts of diatomite, 6-8 parts of hydroxypropyl methyl cellulose, 3-4 parts of defoaming agent, 1.8-2.4 parts of dispersing agent, 3-4 parts of thixotropic agent, 1.4-1.8 parts of titanium dioxide, 3-4 parts of calcined kaolin, 2-4 parts of hollow glass microsphere, 2-4 parts of film-forming auxiliary agent, 17-19 parts of nano titanium dioxide, 24-28 parts of organic silicon modified acrylic emulsion, 7-9 parts of ethylene-vinyl acetate copolymer and 85-95 parts of deionized water.
3. The preparation method of the environment-friendly interior wall coating according to claim 1, wherein in the step (1), the shell grinding time is 10-12h, the grinding medium is zirconia balls, the ball-to-material ratio is 4-6:1, and the rotating speed of a ball mill is 30-40 r/min.
4. The method for preparing environment-friendly interior wall paint according to claim 1 or 2, wherein the dispersant is one or more of sodium polyphosphate, sodium pyrophosphate and sodium dodecyl sulfate.
5. The method for preparing environment-friendly interior wall paint according to claim 1 or 2, wherein the thixotropic agent is magnesium aluminum silicate.
6. The preparation method of the environment-friendly interior wall coating according to claim 1 or 2, wherein the film-forming assistant is 2, 2, 4-trimethyl-1, 3-pentanediol monoisobutyrate, a dry film mildew preventive and dodecylphenol polyoxyethylene ether in a mass ratio of 3:1-2: 2-3.
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| CN110395965A (en) * | 2019-08-19 | 2019-11-01 | 广东狮力德建材有限公司 | It is a kind of to remove aldehyde interior wall coating and preparation method thereof by the inorganic of filler material of conch meal |
| CN110952673A (en) * | 2019-12-17 | 2020-04-03 | 和县明生环保材料有限责任公司 | Preparation method of flame-retardant radon-proof heat-insulation wall material |
| CN111218169A (en) * | 2020-03-27 | 2020-06-02 | 吉林省绿森林环保科技有限公司 | Anti-cracking formaldehyde-removing interior wall coating and preparation method thereof |
| CN113216808B (en) * | 2021-05-12 | 2022-01-18 | 广东福临门世家智能家居有限公司 | Anion glass door and window with sterilization and formaldehyde removal functions and preparation method thereof |
| CN113717569A (en) * | 2021-10-12 | 2021-11-30 | 湖北三棵树新材料科技有限公司 | Noise-reducing sound-insulating interior wall putty paste and preparation method thereof |
| CN114149701B (en) * | 2021-12-03 | 2023-02-28 | 广东嘉宝莉科技材料有限公司 | Antiviral and formaldehyde-resistant A-grade fireproof interior wall coating and preparation method thereof |
| CN115141517A (en) * | 2022-08-03 | 2022-10-04 | 广东涂百年新型材料有限公司 | Nano dry powder coating and construction method thereof |
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