CN110982307A - Ecological shell powder interior wall coating and preparation method thereof - Google Patents
Ecological shell powder interior wall coating and preparation method thereof Download PDFInfo
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- CN110982307A CN110982307A CN201911233046.7A CN201911233046A CN110982307A CN 110982307 A CN110982307 A CN 110982307A CN 201911233046 A CN201911233046 A CN 201911233046A CN 110982307 A CN110982307 A CN 110982307A
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D1/00—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
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- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/14—Paints containing biocides, e.g. fungicides, insecticides or pesticides
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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- C—CHEMISTRY; METALLURGY
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- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
- C09D7/62—Additives non-macromolecular inorganic modified by treatment with other compounds
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/65—Additives macromolecular
Abstract
The invention discloses an ecological shell powder interior wall coating and a preparation method thereof. The ecological shell powder interior wall coating comprises the following raw materials: the shell calcium hydroxide powder comprises shell calcium hydroxide fine powder, cellulose, redispersible latex powder and filler, wherein the weight of the shell calcium hydroxide fine powder is 5-60% of the total weight of the raw materials. The ecological shell powder interior wall coating provided by the invention not only has the function of regulating indoor air humidity, but also has better function of decomposing harmful gases such as formaldehyde and the like and good mildew-proof and sterilization functions.
Description
Technical Field
The invention relates to the technical field of coatings, and particularly relates to an ecological shell powder interior wall coating and a preparation method thereof.
Background
In recent years, with the increasing awareness of environmental protection, the requirements of people on the performance and safety of interior wall coatings are higher and higher. The existing interior wall coating which accounts for the main market share of the interior wall coating is a synthetic resin emulsion paint, and the coating is easy to breed bacteria after being affected with damp, has the phenomena of falling off, color change and the like, seriously influences the service life and the indoor appearance, causes pollution to be unfavorable for health, and cannot purify the polluted environment.
The main components of the existing shell powder coating product comprise shell calcium carbonate, redispersible latex powder and the like, wherein the redispersible latex powder is an organic high polymer and mainly plays a role in bonding. Although the product is superior to the traditional emulsion paint in the aspect of environmental protection performance, the product has the defects of poor physical property of the coating, mainly powder falling, wet rub resistance and the like; in addition, because the shell calcium carbonate is prepared by directly grinding shells, the shell calcium carbonate contains a large amount of microorganisms, is easy to mildew and breed bacteria, and has fishy smell remained in the shells to deteriorate the indoor environment, thereby seriously affecting the use effect of a coating product and the body health of a user, and having no functions of purifying air, regulating humidity, removing formaldehyde and the like.
Disclosure of Invention
The invention aims to provide an ecological shell powder interior wall coating and a preparation method thereof, and aims to ensure the overall performance of a shell powder coating product and solve the existing problems.
In order to achieve the purpose, the technical scheme of the invention is as follows:
in a first aspect, the invention provides an ecological shell powder interior wall coating, which comprises the following raw materials: the shell calcium hydroxide powder comprises shell calcium hydroxide fine powder, redispersible latex powder, cellulose and a filler, wherein the weight of the shell calcium hydroxide fine powder is 5-60% of the total weight of the raw materials.
Preferably, the ecological shell powder interior wall coating comprises the following raw materials in percentage by weight: 10-60% of shell calcium hydroxide fine powder, 3-35% of redispersible latex powder, 20-40% of modified shell fine powder, 0.3-10% of cellulose and the balance of filler.
Preferably, the ecological shell powder interior wall coating is selected from any one of a water-based coating and a dry powder coating.
Preferably, the shell calcium hydroxide fine powder is prepared by the following method:
removing impurities from shells, calcining to obtain shell calcium oxide, performing digestion reaction on the obtained shell calcium oxide and water to generate shell calcium hydroxide coarse powder, and separating and selecting the obtained shell calcium hydroxide coarse powder to obtain shell calcium hydroxide fine powder.
Preferably, the modified shell fine powder is prepared by adopting the following method:
adding titanium dioxide and tourmaline powder into water, performing ultrasonic dispersion to obtain a titanium dioxide dispersion solution, sequentially adding sodium alginate and a nonionic surfactant into the titanium dioxide dispersion solution, performing ultrasonic-microwave combined treatment for 0.5-2 h, then adding shell fine powder, performing water bath reaction for 4-8 h, cooling, washing, centrifuging, drying, and grinding to obtain modified shell fine powder.
Further preferably, the weight ratio of the titanium dioxide, the tourmaline powder, the sodium alginate and the shell fine powder is 0.5-2: 0.5-3: 2-5: 100.
More preferably, the weight ratio of the nonionic surfactant to the shell fine powder is 1-5: 100.
Further preferably, the conditions of the ultrasonic-microwave combined treatment are as follows: the ultrasonic power is 300-500W, the microwave power is 300-500W, and the temperature is 60-80 ℃.
Further preferably, the conditions of the water bath reaction are as follows: the temperature is 60-90 ℃, and the stirring speed is 100-200 r/min.
Preferably, the filler is selected from one or more of ground calcium carbonate, quartz sand, bentonite, barite powder, talcum powder and mica.
Compared with the prior art, the invention has the beneficial effects that:
(1) the shell calcium hydroxide adopted by the invention is combined with the redispersible latex powder, so that the product is scrubbing resistant, and the problem of insufficient physical properties of the coating is solved; meanwhile, after the shell calcium hydroxide is calcined at high temperature, a large amount of microorganisms and fishy smell contained in the shell raw material are removed, the physical property of the product is greatly improved, and the indoor environment is thoroughly improved.
(2) The shell calcium hydroxide adopted by the invention is alkaline and has a better mildew-proof and sterilization function under the synergistic action of negative ions released by tourmaline powder; the calcined shell calcium hydroxide has a large amount of microporous structures and can well adjust the humidity and purify the air;
(3) according to the invention, the microporous structure of the modified shell fine powder is used for loading titanium dioxide and tourmaline powder, so that the shell powder interior wall coating has a better function of decomposing harmful gases such as formaldehyde;
(4) compared with the existing shell powder coating products in the market, the shell calcium hydroxide adopted in the formula is an inorganic adhesive material with excellent performance, and reacts with carbon dioxide in the air to be reduced into calcium carbonate, so that the effect of curing the product and purifying the air is achieved, the environment-friendly performance and the good physical property of the coating are achieved, the wet rubbing resistance and the powder falling resistance are realized, and the coating is a healthy and ecological type interior wall coating with excellent performance.
Detailed Description
The following further describes the embodiments of the present invention. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
In a first aspect, the invention provides an ecological shell powder interior wall coating, which comprises the following raw materials: the shell calcium hydroxide powder comprises shell calcium hydroxide fine powder, redispersible latex powder, cellulose and a filler, wherein the weight of the shell calcium hydroxide fine powder is 5-60% of the total weight of the raw materials.
In the embodiment, the ecological shell powder interior wall coating comprises the following raw materials: fine shell calcium hydroxide powder, redispersible latex powder, modified shell fine powder, cellulose and filler; the shell calcium hydroxide composite material comprises, by weight, 10-60% of shell calcium hydroxide fine powder, 3-35% of redispersible latex powder, 20-40% of modified shell fine powder, 0.3-10% of cellulose and the balance of filler.
In the embodiment, the ecological shell powder interior wall coating comprises the following raw materials in percentage by weight: 40-50% of shell calcium hydroxide fine powder, 3-35% of redispersible latex powder, 20-35% of modified shell fine powder, 0.5-5% of cellulose and the balance of filler.
In the embodiment, the ecological shell powder inner wall coating can be prepared into a water-based state and a dry powder state.
In the embodiment, the shell calcium hydroxide fine powder is prepared by the following method:
removing impurities from shells, calcining to obtain shell calcium oxide, performing digestion reaction on the obtained shell calcium oxide and water to generate shell calcium hydroxide coarse powder, and separating and selecting the obtained shell calcium hydroxide coarse powder to obtain shell calcium hydroxide fine powder.
Further, the shell calcium hydroxide fine powder is prepared by adopting the following method:
washing and drying shells, then soaking the shells in an acid solution for 30-120 min, washing and drying the shells, heating the shells to 600-800 ℃, carrying out heat preservation and calcination for 2-4 h, heating the shells to 900-1100 ℃, carrying out heat preservation and calcination for 60-90 min to obtain crude shell calcium oxide, digesting the obtained crude shell calcium oxide into coarse shell calcium hydroxide powder through water vapor generated by spraying and atomizing, and carrying out secondary digestion, separation and powder selection on the obtained coarse shell calcium hydroxide powder to obtain fine shell calcium hydroxide powder.
Further, the acid solution is any one or two of hydrochloric acid, nitric acid, phosphoric acid and sulfuric acid.
Further, the acid solution is hydrochloric acid.
Furthermore, the mass concentration of the acid solution is 0.1-0.2%.
Furthermore, the particle size of the shell calcium hydroxide is 300-500 meshes.
In the embodiment, the modified shell fine powder is prepared by the following method:
adding titanium dioxide and tourmaline powder into water, performing ultrasonic dispersion to obtain a titanium dioxide dispersion solution, sequentially adding sodium alginate and a nonionic surfactant into the titanium dioxide dispersion solution, performing ultrasonic-microwave combined treatment for 0.5-2 h, adding shell fine powder, performing water bath reaction for 4-8 h, cooling, washing, centrifuging, drying, and grinding to obtain modified shell fine powder.
Further, the nonionic surfactant is selected from one or more of polyvinylpyrrolidone, polyethylene glycol, polypropylene glycol and polyvinyl alcohol.
Further, the weight ratio of the titanium dioxide, the tourmaline powder, the sodium alginate to the shell fine powder is 0.5-2: 0.5-3: 2-5: 100.
Further, the weight ratio of the water to the shell fine powder is 2-3: 1.
Further, the weight ratio of the nonionic surfactant to the shell fine powder is 1-5: 100.
Further, the ultrasonic dispersion conditions are as follows: the ultrasonic power is 300-500W, and the ultrasonic time is 10-30 min.
Further, the conditions of the ultrasonic-microwave combined treatment are as follows: the ultrasonic power is 300-500W, the microwave power is 300-500W, and the temperature is 60-80 ℃.
Further, the shell fine powder is prepared by adopting the following method: cleaning and airing the shell, calcining for 1-3 h at 200-400 ℃, cooling and grinding to obtain fine shell powder.
Further, the particle size of the shell fine powder is 500-800 meshes.
Further, the average particle size of the titanium dioxide is 20-100 nm.
Further, the mean particle size of the tourmaline powder is 20-100 nm.
Further, the conditions of the water bath reaction are as follows: the temperature is 60-90 ℃, and the stirring speed is 100-200 r/min.
In the present embodiment, the filler is selected from one or more of ground calcium carbonate, quartz sand, bentonite, barite powder, talc powder, and mica.
In a second aspect, the invention provides a method for preparing the ecological shell powder interior wall coating material, which comprises the following steps:
(1) putting the filler into a stirrer and stirring uniformly;
(2) adding the cellulose into a stirrer and uniformly stirring;
(3) adding the modified shell fine powder into a stirrer and stirring uniformly;
(4) adding the fine shell calcium hydroxide powder into a stirrer and stirring uniformly;
(5) adding the redispersible latex powder into a stirrer, and uniformly stirring to obtain the ecological shell powder interior wall coating.
In the present embodiment, the stirring conditions in the step (1) are: the rotating speed is 800-1000 rpm, and the stirring time is 5-10 min.
In the present embodiment, the stirring conditions in the step (2) are: the rotating speed is 800-1000 rpm, and the stirring time is 5-10 min.
In the present embodiment, the stirring conditions in the step (3) are: the rotating speed is 800-1000 rpm, and the stirring time is 5-10 min.
In the present embodiment, the stirring conditions in the step (4) are: the rotating speed is 800-1000 rpm, and the stirring time is 15-20 min.
In the present embodiment, the stirring conditions in the step (5) are: the rotation speed is 300-500 rpm, and the stirring time is 5-10 min.
The following examples further illustrate the invention.
Example 1
The preparation method of the ecological shell powder interior wall coating provided by the embodiment comprises the following steps:
(1) cleaning and drying shells, then soaking the shells in 0.2% hydrochloric acid solution for 60min, washing off organic and inorganic impurities on the surfaces of the shells, cleaning the shells with deionized water, then drying the shells in an oven, transferring the dried shells into a muffle furnace, calcining the shells for 3h at 700 ℃, heating the shells to 1000 ℃ and calcining the shells for 75min to obtain shell calcium oxide, digesting the obtained shell calcium oxide into shell calcium hydroxide coarse powder by water vapor generated by spraying and atomizing, performing secondary digestion and wind power powder selection on the obtained shell calcium hydroxide coarse powder, and removing undigested shell calcium oxide crude products to obtain shell calcium hydroxide fine powder;
(2) cleaning and drying shells, soaking in 0.2% hydrochloric acid solution for 90min to remove organic and inorganic impurities on the surfaces of the shells, cleaning with deionized water, drying in an oven, calcining at 300 deg.C for 2h in a muffle furnace, cooling, grinding in a grinder, and sieving with 500 mesh sieve to obtain fine powder of the shells; weighing the following raw materials in parts by weight: 0.5 part of titanium dioxide (with the average particle size of 50nm), 1 part of tourmaline powder (with the average particle size of 50nm), 4 parts of sodium alginate, 4 parts of polyvinylpyrrolidone, 250 parts of deionized water and 100 parts of shell fine powder, adding the titanium dioxide and the tourmaline powder into the deionized water, performing ultrasonic dispersion for 20min under the condition of the power of 400W to obtain a titanium dioxide dispersion solution, sequentially adding the sodium alginate and a nonionic surfactant into the titanium dioxide dispersion solution, performing ultrasonic-microwave combined treatment for 1.5h under the conditions of the ultrasonic power of 400W, the microwave power of 400W and the temperature of 75 ℃, adding the shell fine powder, performing water bath reaction for 6h under the conditions of the temperature of 80 ℃ and the stirring speed of 180r/min, and cooling, washing, centrifuging, drying, grinding and sieving by a 500-mesh sieve to obtain modified shell fine powder;
(3) weighing the following raw materials in percentage by weight: 50% of shell calcium hydroxide fine powder, 4% of redispersible latex powder, 29.5% of modified shell fine powder, 14% of ground calcium carbonate, 0.5% of bentonite and 2% of cellulose; placing heavy calcium carbonate and bentonite into a stirrer, and stirring for 7min at the rotating speed of 800 rpm; adjusting the rotating speed of the stirrer to 1000rpm, adding the cellulose into the stirrer, and stirring for 10 min; adding the modified shell fine powder into a stirrer at the rotating speed of 1000rpm, and stirring for 10 min; adding the fine shell calcium hydroxide powder into a stirrer at the rotating speed of 1000rpm, and stirring for 15 min; and adding the dispersible latex powder into a stirrer, adjusting the rotating speed of the stirrer to 500rpm, and stirring for 10min to obtain the ecological shell powder interior wall coating.
Example 2
In this example, the shell calcium hydroxide fine powder and the modified shell fine powder are prepared according to the steps (1) and (2) of example 1, and then the following raw materials are weighed according to the weight percentage: 40% of shell calcium hydroxide fine powder, 5% of redispersible latex powder, 38.5% of modified shell fine powder, 15.5% of ground calcium carbonate, 0.5% of bentonite and 0.5% of cellulose; placing heavy calcium carbonate and bentonite into a stirrer, and stirring for 7min at the rotating speed of 800 rpm; adjusting the rotating speed of the stirrer to 1000rpm, adding the cellulose into the stirrer, and stirring for 10 min; adding the modified shell fine powder into a stirrer at the rotating speed of 1000rpm, and stirring for 10 min; adding the fine shell calcium hydroxide powder into a stirrer at the rotating speed of 1000rpm, and stirring for 15 min; and adding the dispersible latex powder into a stirrer, adjusting the rotating speed of the stirrer to 500rpm, and stirring for 10min to obtain the ecological shell powder interior wall coating.
Example 3
In this example, the shell calcium hydroxide fine powder and the modified shell fine powder are prepared according to the steps (1) and (2) of example 1, and then the following raw materials are weighed according to the weight percentage: 30% of shell calcium hydroxide fine powder, 6% of redispersible latex powder, 47.5% of modified shell fine powder, 15.5% of ground calcium carbonate, 0.5% of bentonite and 0.5% of cellulose; placing heavy calcium carbonate and bentonite into a stirrer, and stirring for 7min at the rotating speed of 800 rpm; adjusting the rotating speed of the stirrer to 1000rpm, adding the cellulose into the stirrer, and stirring for 10 min; adding the modified shell fine powder into a stirrer at the rotating speed of 1000rpm, and stirring for 10 min; adding the fine shell calcium hydroxide powder into a stirrer at the rotating speed of 1000rpm, and stirring for 15 min; and adding the dispersible latex powder into a stirrer, adjusting the rotating speed of the stirrer to 500rpm, and stirring for 10min to obtain the ecological shell powder interior wall coating.
Example 4
In this example, the shell calcium hydroxide fine powder and the modified shell fine powder are prepared according to the steps (1) and (2) of example 1, and then the following raw materials are weighed according to the weight percentage: 5% of shell calcium hydroxide fine powder, 10% of redispersible latex powder, 71.5% of modified shell fine powder, 12.5% of ground calcium carbonate, 0.5% of bentonite and 0.5% of cellulose; placing heavy calcium carbonate and bentonite into a stirrer, and stirring for 7min at the rotating speed of 800 rpm; adjusting the rotating speed of the stirrer to 1000rpm, adding the cellulose into the stirrer, and stirring for 10 min; adding the modified shell fine powder into a stirrer at the rotating speed of 1000rpm, and stirring for 10 min; adding the fine shell calcium hydroxide powder into a stirrer at the rotating speed of 1000rpm, and stirring for 15 min; and adding the dispersible latex powder into a stirrer, adjusting the rotating speed of the stirrer to 500rpm, and stirring for 10min to obtain the ecological shell powder interior wall coating.
Example 5
In this example, the shell calcium hydroxide fine powder and the modified shell fine powder are prepared according to the steps (1) and (2) of example 1, and then the following raw materials are weighed according to the weight percentage: 60% of shell calcium hydroxide fine powder, 3% of redispersible latex powder, 13% of modified shell fine powder, 23% of ground calcium carbonate, 0.5% of bentonite and 0.5% of cellulose; placing heavy calcium carbonate and bentonite into a stirrer, and stirring for 7min at the rotating speed of 800 rpm; adjusting the rotating speed of the stirrer to 1000rpm, adding the cellulose into the stirrer, and stirring for 10 min; adding the modified shell fine powder into a stirrer at the rotating speed of 1000rpm, and stirring for 10 min; adding the fine shell calcium hydroxide powder into a stirrer at the rotating speed of 1000rpm, and stirring for 15 min; and adding the dispersible latex powder into a stirrer, adjusting the rotating speed of the stirrer to 500rpm, and stirring for 10min to obtain the ecological shell powder interior wall coating.
Effect example 1
In order to further illustrate the beneficial effects of the invention, the construction method of the shell powder interior wall coating obtained in the embodiments 1 to 5 is as follows: mixing the shell powder inner wall coating and water according to the weight ratio of 1: 1-1.5, fully stirring the mixture by using an electric stirrer to form uniform liquid coating, and directly coating the liquid coating on the surface of a base layer by using any one construction mode of brushing, rolling and spraying; the construction needs to be carried out twice, the construction thickness is about 1-2 mm each time, the second construction needs to be carried out after the first surface is dried, the total thickness is not more than 3mm, and the mixed coating needs to be used up within 3-4 hours.
The invention also tests the antibacterial property, mildew resistance, washing resistance and organic matter decomposition performance of the shell powder interior wall coating obtained in the embodiment 1-5, ① tests the mildew resistance of the shell powder interior wall coating according to a GB/T1741-79(89) paint film durable mildew resistance test method, ② tests the antibacterial property of the shell powder interior wall coating to Escherichia coli, staphylococcus aureus and Klebsiella pneumoniae according to GB15979-2002, ③ tests the washing resistance of the shell powder interior wall coating according to GB/T9756-2001, ④ puts a substrate (the size is 20cm multiplied by 20cm) coated with the shell powder interior wall coating into a glass box with the volume of 50L, fills formaldehyde into the sealed glass box, and enables the initial concentration of the formaldehyde to reach 9.0mg/m3Irradiating for 72 hours under a daylight lamp, then testing the final concentration of formaldehyde in the glass box, and calculating to obtain the removal of the formaldehydeThe ratio, formaldehyde removal ratio (%) — initial concentration of formaldehyde-final concentration of formaldehyde/initial concentration of formaldehyde × 100%; the test results are shown in table 1.
Table 1 results of performance testing
As can be seen from the performance test results in Table 1, when the content of shell calcium hydroxide in the shell powder interior wall coating is too low (< 30%), the scrub resistance of the shell powder interior wall coating is reduced, because the shell calcium hydroxide reacts with carbon dioxide in the air after being coated on the wall and is reduced into calcium carbonate, which is a curing process, the higher the content of the shell calcium hydroxide is, the higher the curing degree is, the scrubbing resistance is, the alkaline property of the shell calcium hydroxide has good mildew-proof and antibacterial properties, and the higher the content is, the better the mildew-proof and antibacterial properties are. However, the formaldehyde removing effect is reduced due to the fact that the content of the modified shell powder is too low, and tourmaline powder and titanium dioxide in the modified shell powder have a good formaldehyde removing effect.
Example 6
In this example, the shell calcium hydroxide fine powder and the modified shell fine powder are prepared according to the steps (1) and (2) of example 1, and then the following raw materials are weighed according to the weight percentage: 10% of shell calcium hydroxide fine powder, 9% of redispersible latex powder, 40% of modified shell fine powder, 39.3% of ground calcium carbonate, 1% of bentonite and 0.7% of cellulose; placing heavy calcium carbonate and bentonite into a stirrer, and stirring for 7min at the rotating speed of 800 rpm; adjusting the rotating speed of the stirrer to 1000rpm, adding the cellulose into the stirrer, and stirring for 10 min; adding the modified shell fine powder into a stirrer at the rotating speed of 1000rpm, and stirring for 10 min; adding the fine shell calcium hydroxide powder into a stirrer at the rotating speed of 1000rpm, and stirring for 15 min; and adding the dispersible latex powder into a stirrer, adjusting the rotating speed of the stirrer to 500rpm, and stirring for 10min to obtain the ecological shell powder interior wall coating.
Example 7
In this example, the shell calcium hydroxide fine powder and the modified shell fine powder are prepared according to the steps (1) and (2) of example 1, and then the following raw materials are weighed according to the weight percentage: 55% of shell calcium hydroxide fine powder, 3.5% of redispersible latex powder, 20% of modified shell fine powder, 19.8% of ground calcium carbonate, 1% of bentonite and 0.7% of cellulose; placing heavy calcium carbonate and bentonite into a stirrer, and stirring for 7min at the rotating speed of 800 rpm; adjusting the rotating speed of the stirrer to 1000rpm, adding the cellulose into the stirrer, and stirring for 10 min; adding the modified shell fine powder into a stirrer at the rotating speed of 1000rpm, and stirring for 10 min; adding the fine shell calcium hydroxide powder into a stirrer at the rotating speed of 1000rpm, and stirring for 15 min; and adding the dispersible latex powder into a stirrer, adjusting the rotating speed of the stirrer to 500rpm, and stirring for 10min to obtain the ecological shell powder interior wall coating.
Example 8
In this example, the shell calcium hydroxide fine powder and the modified shell fine powder are prepared according to the steps (1) and (2) of example 1, and then the following raw materials are weighed according to the weight percentage: 45% of shell calcium hydroxide fine powder, 4.5% of redispersible latex powder, 30% of modified shell fine powder, 18.8% of ground calcium carbonate, 1% of bentonite and 0.7% of cellulose; placing heavy calcium carbonate and bentonite into a stirrer, and stirring for 7min at the rotating speed of 800 rpm; adjusting the rotating speed of the stirrer to 1000rpm, adding the cellulose into the stirrer, and stirring for 10 min; adding the modified shell fine powder into a stirrer at the rotating speed of 1000rpm, and stirring for 10 min; adding the fine shell calcium hydroxide powder into a stirrer at the rotating speed of 1000rpm, and stirring for 15 min; and adding the dispersible latex powder into a stirrer, adjusting the rotating speed of the stirrer to 500rpm, and stirring for 10min to obtain the ecological shell powder interior wall coating.
Example 9
In this example, the shell calcium hydroxide fine powder and the modified shell fine powder are prepared according to the steps (1) and (2) of example 1, and then the following raw materials are weighed according to the weight percentage: 50% of shell calcium hydroxide fine powder, 4% of redispersible latex powder, 25% of modified shell fine powder, 19.3% of ground calcium carbonate, 1% of bentonite and 0.7% of cellulose; placing heavy calcium carbonate and bentonite into a stirrer, and stirring for 10min at the rotating speed of 800 rpm; adjusting the rotating speed of the stirrer to 1000rpm, adding the cellulose into the stirrer, and stirring for 5 min; adding the modified shell fine powder into a stirrer at the rotating speed of 1000rpm, and stirring for 5 min; adding the shell calcium hydroxide fine powder into a stirrer at the rotating speed of 800rpm, and stirring for 20 min; and adding the dispersible latex powder into a stirrer, adjusting the rotating speed of the stirrer to 500rpm, and stirring for 10min to obtain the ecological shell powder interior wall coating.
Effect example 2
In order to further illustrate the beneficial effects of the invention, the invention also tests the antibacterial property, mildew resistance, scrub resistance and organic matter decomposition performance of the shell powder internal wall coating obtained in the examples 6-9 according to the method of the effect example 1, and the test results are shown in the table 2
Table 2 results of performance testing
Example 10
The preparation method of the ecological shell powder interior wall coating provided by the embodiment comprises the following steps:
(1) cleaning and drying shells, then soaking the shells in 0.1% hydrochloric acid solution for 120min, washing off organic and inorganic impurities on the surfaces of the shells, cleaning the shells with deionized water, then drying the shells in an oven, transferring the dried shells into a muffle furnace, calcining the shells at 600 ℃ for 3h, calcining the shells at 900 ℃ for 90min to obtain shell calcium oxide, digesting the obtained shell calcium oxide into shell calcium hydroxide coarse powder by water vapor generated by spraying and atomizing, performing secondary digestion and wind power powder selection on the obtained shell calcium hydroxide coarse powder, and removing undigested shell calcium oxide crude products to obtain shell calcium hydroxide fine powder;
(2) cleaning and drying shells, soaking in 0.2% hydrochloric acid solution for 90min to remove organic and inorganic impurities on the surfaces of the shells, cleaning with deionized water, drying in an oven, calcining at 200 deg.C for 4h in a muffle furnace, cooling, grinding in a grinder, and sieving with 500 mesh sieve to obtain fine powder of the shells; weighing the following raw materials in parts by weight: 0.5 part of titanium dioxide (with the average particle size of 20nm), 1 part of tourmaline powder (with the average particle size of 20nm), 2 parts of sodium alginate, 1 part of polyvinylpyrrolidone, 200 parts of deionized water and 100 parts of shell fine powder, adding the titanium dioxide and the tourmaline powder into the deionized water, performing ultrasonic dispersion for 10min under the condition of the power of 300W to obtain a titanium dioxide dispersion solution, sequentially adding the sodium alginate and a nonionic surfactant into the titanium dioxide dispersion solution, performing ultrasonic-microwave combined treatment for 0.5h under the conditions of the ultrasonic power of 300W, the microwave power of 300W and the temperature of 60 ℃, adding the shell fine powder, performing water bath reaction for 4h under the conditions of the temperature of 60 ℃ and the stirring speed of 100r/min, cooling, washing, centrifuging, drying, grinding and sieving by a 500-mesh sieve to obtain modified shell fine powder;
(3) the ecological shell powder interior wall coating is prepared according to the step (3) of the example 1.
The shell powder inner wall coating obtained in the embodiment is tested according to the method of effect example 1, and the test results include the following: the mildew-proof grade is 0 grade, the antibacterial rates to Escherichia coli, staphylococcus aureus and Klebsiella pneumoniae are respectively 97.25%, 97.17% and 96.29%, the washing and brushing times are more than 2500, and the formaldehyde removal rate is 80.1%.
Example 11
The preparation method of the ecological shell powder interior wall coating provided by the embodiment comprises the following steps:
(1) cleaning and drying shells, then soaking the shells in a hydrochloric acid solution with the mass concentration of 0.2% for 60min, washing off organic and inorganic impurities on the surfaces of the shells, cleaning the shells with deionized water, then drying the shells in an oven, transferring the dried shells into a muffle furnace, calcining the shells at 800 ℃ for 2h, calcining the shells at the elevated temperature of 1100 ℃ for 60min to obtain shell calcium oxide, digesting the obtained shell calcium oxide into shell calcium hydroxide coarse powder through water vapor generated by spray atomization, performing secondary digestion and wind power powder selection on the obtained shell calcium hydroxide coarse powder, and removing undigested shell calcium oxide coarse products to obtain shell calcium hydroxide fine powder;
(2) cleaning and drying shells, soaking in 0.2% hydrochloric acid solution for 90min, washing to remove organic and inorganic impurities on the surfaces of the shells, cleaning with deionized water, drying in an oven, calcining at 250 deg.C for 3 hr, cooling, grinding in a grinder, and sieving with 500 mesh sieve to obtain fine powder of the shells; weighing the following raw materials in parts by weight: 1 part of titanium dioxide (with the average particle size of 100nm), 2 parts of tourmaline powder (with the average particle size of 100nm), 5 parts of sodium alginate, 5 parts of polyvinylpyrrolidone, 300 parts of deionized water and 100 parts of shell fine powder, adding the titanium dioxide and the tourmaline powder into the deionized water, performing ultrasonic dispersion for 30min under the condition of the power of 300W to obtain a titanium dioxide dispersion liquid, sequentially adding the sodium alginate and a nonionic surfactant into the titanium dioxide dispersion liquid, performing ultrasonic-microwave combined treatment for 2h under the conditions of the ultrasonic power of 500W, the microwave power of 500W and the temperature of 80 ℃, adding the shell fine powder, performing water bath reaction for 8h under the conditions of the temperature of 90 ℃ and the stirring speed of 200r/min, and obtaining modified shell fine powder by washing, centrifuging, drying, grinding and sieving with a 500-mesh sieve after cooling;
(3) the ecological shell powder interior wall coating is prepared according to the step (3) of the example 1.
The shell powder inner wall coating obtained in the embodiment is tested according to the method of effect example 1, and the test results include the following: the mildew-proof grade is 0 grade, the antibacterial rates to Escherichia coli, staphylococcus aureus and Klebsiella pneumoniae are 93.01%, 91.99% and 91.31% respectively, and the formaldehyde removal rate is 84.6% when the washing and brushing times are more than 2500 times.
Example 12
The method comprises the steps of preparing shell calcium hydroxide fine powder according to the step (1) of the example 1, preparing modified shell powder according to the step (1) of the invention patent with the publication number of CN106084891B, repeating the step (3) of the example 1, replacing the modified shell fine powder in the step (3) of the example 1 with the modified shell powder obtained in the example, and finally obtaining the ecological shell powder interior wall coating.
The shell powder inner wall coating obtained in the embodiment is tested according to the method of effect example 1, and the test results include the following: the mildew-proof grade is 0 grade, the antibacterial rates to Escherichia coli, staphylococcus aureus and Klebsiella pneumoniae are respectively 99.99%, 99.99% and 99.89%, the washing and brushing times are more than 2500, and the formaldehyde removal rate is 89.6%.
Comparative example 1
Preparing fine shell calcium hydroxide powder according to the step (1) of the embodiment 1, cleaning and drying shells, soaking the shells in a hydrochloric acid solution with the mass concentration of 0.2% for 90min, washing off organic and inorganic impurities on the surfaces of the shells, cleaning the shells with deionized water, drying the shells in an oven, transferring the dried shells into a muffle furnace, calcining the shells at 300 ℃ for 2h, cooling the shells, transferring the shells into a grinder, grinding the shells, and sieving the shells with a 500-mesh sieve to obtain fine shell powder; then, the step (3) of the example 1 is repeated, and the modified shell fine powder obtained in the step (3) of the example 1 is replaced by the shell fine powder obtained in the example, so that the ecological shell powder interior wall coating is finally obtained.
The shell powder inner wall coating obtained in the embodiment is tested according to the method of effect example 1, and the test results include the following: the mildew-proof grade is 1 grade, the antibacterial rates to Escherichia coli, staphylococcus aureus and Klebsiella pneumoniae are respectively 92.87%, 90.34% and 89.24%, the washing and brushing times are more than 2500, and the formaldehyde removal rate is 32.3%.
The embodiments of the present invention have been described in detail, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, and the scope of protection is still within the scope of the invention.
Claims (10)
1. The ecological shell powder interior wall coating is characterized by comprising the following raw materials: the shell calcium hydroxide powder comprises shell calcium hydroxide fine powder, cellulose, redispersible latex powder and filler, wherein the weight of the shell calcium hydroxide fine powder is 5-60% of the total weight of the raw materials.
2. The ecological shell powder interior wall coating material of claim 1, which is characterized by comprising the following raw materials in percentage by weight: 10-60% of shell calcium hydroxide fine powder, 3-35% of redispersible latex powder, 20-40% of modified shell fine powder, 0.3-10% of cellulose and the balance of filler.
3. The ecological shell powder interior wall coating according to any one of claims 1-2, wherein the ecological shell powder interior wall coating is selected from one or two of a water-based coating and a dry powder coating.
4. The ecological shell powder interior wall coating of claim 1, wherein the shell calcium hydroxide fine powder is prepared by the following method:
removing impurities from shells, calcining to obtain shell calcium oxide, performing digestion reaction on the obtained shell calcium oxide and water to generate shell calcium hydroxide coarse powder, and separating and selecting the obtained shell calcium hydroxide coarse powder to obtain shell calcium hydroxide fine powder.
5. The ecological shell powder interior wall coating according to claim 2, wherein the modified shell fine powder is prepared by the following method:
adding titanium dioxide and tourmaline powder into water, performing ultrasonic dispersion to obtain a titanium dioxide dispersion solution, sequentially adding sodium alginate and a nonionic surfactant into the titanium dioxide dispersion solution, performing ultrasonic-microwave combined treatment for 0.5-2 h, then adding shell fine powder, performing water bath reaction for 4-8 h, cooling, washing, centrifuging, drying, and grinding to obtain modified shell fine powder.
6. The modified shell fine powder of claim 5, wherein the weight ratio of the titanium dioxide, the tourmaline powder, the sodium alginate and the shell fine powder is 0.5-2: 0.5-3: 2-5: 100.
7. The modified shell fine powder according to claim 5, wherein the weight ratio of the nonionic surfactant to the shell fine powder is 1-5: 100.
8. The modified shell fines of claim 5 where the combined sonication-microwave treatment conditions are: the ultrasonic power is 300-500W, the microwave power is 300-500W, and the temperature is 60-80 ℃.
9. The modified shell fine powder of claim 5, wherein the conditions of the water bath reaction are as follows: the temperature is 60-90 ℃, and the stirring speed is 100-200 r/min.
10. The ecological shell powder interior wall coating according to claim 1, wherein the filler is selected from one or more of ground calcium carbonate, quartz sand, bentonite, barite powder, talcum powder and mica.
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Application publication date: 20200410 |