CN108751902B - Light plastering gypsum capable of effectively decomposing formaldehyde - Google Patents
Light plastering gypsum capable of effectively decomposing formaldehyde Download PDFInfo
- Publication number
- CN108751902B CN108751902B CN201810901434.7A CN201810901434A CN108751902B CN 108751902 B CN108751902 B CN 108751902B CN 201810901434 A CN201810901434 A CN 201810901434A CN 108751902 B CN108751902 B CN 108751902B
- Authority
- CN
- China
- Prior art keywords
- parts
- gypsum
- mass
- mixture
- water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/14—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
- C04B28/142—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements containing synthetic or waste calcium sulfate cements
- C04B28/144—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements containing synthetic or waste calcium sulfate cements the synthetic calcium sulfate being a flue gas desulfurization product
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00017—Aspects relating to the protection of the environment
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00025—Aspects relating to the protection of the health, e.g. materials containing special additives to afford skin protection
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Catalysts (AREA)
Abstract
A light plastering gypsum capable of effectively decomposing formaldehyde comprises the following components in parts by mass: 5-10 parts of nano aerogel; 40-60 parts of gypsum; 10-20 parts of limestone; 0.5-1.5 parts of tackifier; 0.02-0.04 part of retarder; 0.1-0.5 part of water-retaining agent; 5-10 parts of light filler; 1-2 parts of redispersible latex powder. The invention can be used after a plurality of components are uniformly mixed; the nano aerogel is used as a functional component, and has a good decomposition effect on formaldehyde due to large porosity and the catalytic action of metal ions after certain metal elements are compounded in the nano aerogel because the nano aerogel has a rich porous structure; the water retention rate of the product obtained by the invention is higher; the compressive strength, the breaking strength and the bonding strength are higher.
Description
The technical field is as follows:
the invention relates to the technical field of building materials, in particular to light plastering gypsum capable of effectively decomposing formaldehyde.
Background art:
the plastering gypsum is a high-efficiency and energy-saving plastering material for building interior walls and ceilings, which is processed by taking gypsum as a main gel material and adding sand, a certain admixture and a special composite additive, and is widely used for leveling and decorating interior walls and roofs.
Formaldehyde is a colorless, particularly pungent and irritating gas at room temperature and is also a well-known indoor gaseous pollutant mainly from indoor furniture paint, flooring materials, wallpaper and smoke generated by burning cigarettes. About 80% of modern people spend indoors, the indoor environment is closely related to the health and the working efficiency of people, people can cause a series of indoor air syndromes when being in the formaldehyde environment with the concentration of more than 0.1ppm for a long time, and researches show that formaldehyde also has obvious positive correlation to the leukemia. Therefore, the treatment of indoor formaldehyde gas is related to the health of people and the safety of living environment. At present, various means such as adsorption, catalytic oxidation and plant filtration can be used for treating indoor formaldehyde pollutants, and from the economic perspective, the adsorption method has the advantages of low price, convenience in use and the like, and is always the main means for removing formaldehyde, for example, porous activated carbon particles are usually placed in newly-decorated houses to adsorb formaldehyde, however, the traditional adsorption material does not have the specificity of formaldehyde adsorption, and the activated carbon particles are locally used in some indoor places to adsorb formaldehyde, so that the adsorption capacity is limited, the adsorption effect is unstable, and at present, the research reports of adsorbing and decomposing formaldehyde by using components in building materials are less.
Patent application document CN105669152B discloses leveling mud with purification function for indoor wall substrate, wherein the leveling mud in the patent utilizes the porosity of diatomite, the photocatalysis of nano titanium dioxide, and the strong oxidizing property of calcium oxide to purify air and decompose formaldehyde. Although the leveling mud can realize the removal of formaldehyde, the components of the leveling mud are complex, and one formula contains 17 components, so that the operation complexity and the operation cost are undoubtedly increased to a certain extent; in this patent, the active component used is diatomaceous earth, which has a limited surface area and a limited catalytic effect.
In patent application CN106458758A, a coated product with photocatalytic properties is disclosed, which mainly comprises titanium dioxide particles, and the titanium dioxide particles undergo a photocatalytic reaction under indoor lighting, thereby degrading formaldehyde pollutants. However, in this process, the catalytic effect is not satisfactory due to its limited specific surface area and activity.
The invention content is as follows:
the invention provides the light plastering gypsum capable of effectively decomposing formaldehyde, improves the formaldehyde purification effect and solves the problems in the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a light plastering gypsum capable of effectively decomposing formaldehyde comprises the following components in parts by mass: 5-10 parts of nano aerogel; 40-60 parts of gypsum; 10-20 parts of limestone; 0.5-1.5 parts of tackifier; 0.02-0.04 part of retarder; 0.1-0.5 part of water-retaining agent; 5-10 parts of light filler; 1-2 parts of redispersible latex powder.
The nano aerogel is used as a functional component, and has a good decomposition effect on formaldehyde due to large porosity and the catalytic action of metal ions after certain metal elements are compounded in the nano aerogel due to the rich porous structure of the nano aerogel.
Preferably, the nano aerogel comprises the following components in parts by weight: 15-25 parts of nano silicon dioxide, 40-55 parts of titanium oxide, 10-15 parts of copper oxide and 20-30 parts of aluminum oxide. The nano aerogel can effectively adsorb formaldehyde due to the porous structure, and the components of the aerogel contain titanium oxide and can generate a photocatalytic reaction, so that formaldehyde pollutants are decomposed.
Preferably, the nano aerogel is prepared by the following steps: the nano aerogel is prepared by mixing the following raw materials, by mass, 95-130.6 parts of titanium tetrachloride, 17-25.4 parts of copper chloride, 52.2-78.2 parts of aluminum chloride and 52-86.7 parts of ethyl orthosilicate, and then putting the mixture into 300 parts of alcohol solvent by a solvothermal method, and drying and roasting the mixture. The catalyst adopts tin chloride to accelerate the reaction, so that the yield of the nano aerogel is improved, and the silicon source adopts tetraethoxysilane to facilitate the formation of pores and the removal of non-metal ions.
Preferably, the nano aerogel also comprises 1-5 parts by mass of tin chloride; the temperature of the solvothermal method is 240 ℃ and 250 ℃, the pressure is 8-12Mpa, and the reaction time is 0.8-1.2 h. The stannic chloride is mainly used for catalytic reaction, so that the porosity of the nano aerogel obtained by the reaction is improved, and the density of the nano aerogel is reduced.
Preferably, the titanium tetrachloride is an alcoholic solution with the mass fraction of 4-6%; the copper chloride is an alcoholic solution with the mass fraction of 1.5-2.5%; the aluminum chloride is an alcohol solution with the mass fraction of 2-4%; the ethyl orthosilicate is an alcoholic solution with the mass fraction of 1.6-2.4%. The uniformity degree of the raw materials during mixing is improved, and on the premise of uniform mixing, in the process of forming the nano aerogel by a solvothermal method, different types of metals can be associated to generate a defect position, and the defect position is also an active position and is used for decomposing formaldehyde.
Preferably, the gypsum is desulfurized gypsum, and the gypsum isThe particle diameter of (A) is 50-100 μm; the particle size of the limestone is 30-70 μm; the redispersible latex powder is one or more than two of ethylene/vinyl acetate copolymer, vinyl acetate/vinyl versatate copolymer and acrylic acid copolymer, the mixture ratio is arbitrary when the two or more than two are mixed, and the bulk density of the redispersible latex powder is 500 kg/m-3。
Preferably, the tackifier is one or a mixture of more than two of polyvinyl alcohol, water-soluble starch, polyacrylamide, carboxymethyl cellulose and carboxymethyl hydroxyethyl cellulose, and the mixture of more than two is in any proportion; the light filler is one or more than two of vitrified micro bubbles, expanded perlite and fly ash ceramsite, the mixture ratio is arbitrary when more than two are mixed, and the bulk density of the light filler is 80-120kg/m3(ii) a The retarder is one or more than two of organic acid and soluble salts thereof, phosphates and protein gypsum retarder, and the mixture ratio of the two or more than two is arbitrary.
Preferably, the water-retaining agent is one or a mixture of more than two of methylcellulose, hydroxypropyl methylcellulose, hydroxyethyl methylcellulose, hydroxypropyl methylcellulose ether, dextrin and bentonite, the mixture ratio of the two or more is arbitrary, and the viscosity of the water-retaining agent is more than 10000Mpa · s.
Preferably, the water-retaining agent is a mixture of dextrin and bentonite, and the mass ratio of the dextrin to the bentonite is 1-10: 5.
preferably, the bentonite is modified bentonite. The modified bentonite is added to play a role of a water retaining agent, and the structure of the bentonite is matched with the nano aerogel, so that the porosity of the lightweight plastering gypsum structure is increased, and the formaldehyde adsorption capacity of the lightweight plastering gypsum is further improved.
Preferably, the modified bentonite is prepared by adopting the following method: mixing sodium-based organic bentonite and hexadecyl trimethyl ammonium bromide or hexadecyl trimethyl ammonium chloride according to the mass ratio of 5: 1.5-2.5, adding distilled water, continuously stirring for 1-4 h, filtering, washing with water until no bromine or chlorine exists in the cleaned water, and drying the filter cake to obtain the modified bentonite.
The invention has the following advantages: the lightweight plastering gypsum is simple and convenient to synthesize, and can be used after a plurality of components are uniformly mixed; the nano aerogel is used as a functional component, and has a good decomposition effect on formaldehyde due to large porosity and the catalytic action of metal ions after certain metal elements are compounded in the nano aerogel because the nano aerogel has a rich porous structure; the water retention rate of the product obtained by the invention is higher; the compressive strength, the breaking strength and the bonding strength are higher.
The specific implementation mode is as follows:
in order to clearly illustrate the technical features of the present invention, the present invention is explained in detail by the following embodiments.
Nano aerogel synthesis example:
nano aerogel example 1:
s1, uniformly mixing and stirring the raw materials: mixing the following raw materials in parts by weight: 95g, copper chloride: 17g, aluminum chloride: 52.2g, ethyl orthosilicate: 52g of alcohol solvent of 150g is added; the titanium tetrachloride is an alcoholic solution with the mass fraction of 4%; the copper chloride is an alcoholic solution with the mass fraction of 1.5%; the aluminum chloride is an alcohol solution with the mass fraction of 2%; the ethyl orthosilicate is an alcoholic solution with the mass fraction of 1.6%; the alcohol solvent is n-butyl alcohol;
s2, solvothermal synthesis: the temperature is 240 ℃, the pressure is 8Mpa, and the reaction time is 1.2 h;
s3, drying and roasting: drying at 20-30 deg.C for 48h, maintaining at 70 deg.C for 48h in a vacuum drying oven, and calcining in a muffle furnace to obtain No. 1 nanometer aerogel.
Nano aerogel example 2:
s1, uniformly mixing and stirring the raw materials: mixing the following raw materials in parts by weight: 130.6g, copper chloride: 25.4g, aluminum chloride: 78.2g, ethyl orthosilicate: 86.7g of alcohol solvent is added into the mixture, and then 300g of alcohol solvent is added into the mixture; the titanium tetrachloride is an alcohol solution with the mass fraction of 6%; the copper chloride is an alcohol solution with the mass fraction of 2.5%; the aluminum chloride is an alcoholic solution with the mass fraction of 4%; the ethyl orthosilicate is an alcoholic solution with the mass fraction of 2.4%; the alcohol solvent is ethanol;
s2, solvothermal synthesis: the temperature is 240 ℃ and 250 ℃, the pressure is 8-12Mpa, and the reaction time is 0.8-1.2 h;
s3, drying and roasting: drying at 20-30 deg.C for 48h, maintaining at 70 deg.C for 48h in a vacuum drying oven, and calcining in a muffle furnace to obtain No. 2 nanometer aerogel.
Nano aerogel example 3:
s1, uniformly mixing and stirring the raw materials: mixing the following raw materials in parts by weight: 112.8g, copper chloride: 21.2g, aluminum chloride: 65.2g, ethyl orthosilicate: 69.4g, then 225g of alcohol solvent is added; the titanium tetrachloride is an alcohol solution with the mass fraction of 5%; the copper chloride is an alcohol solution with the mass fraction of 2%; the aluminum chloride is an alcoholic solution with the mass fraction of 3%; the ethyl orthosilicate is an alcoholic solution with the mass fraction of 2%; the alcohol solvent is isopropanol;
s2, solvothermal synthesis: the temperature is 245 ℃, the pressure is 10Mpa, and the reaction time is 1 h;
s3, drying and roasting: drying at 20-30 deg.C for 48h, maintaining at 70 deg.C for 48h in a vacuum drying oven, and calcining in a muffle furnace to obtain No. 3 nanometer aerogel.
Nano aerogel example 4:
s1, uniformly mixing and stirring the raw materials: mixing the following raw materials in parts by weight: 95g, copper chloride: 17g, aluminum chloride: 52.2g, ethyl orthosilicate: 52g, 1g of stannic chloride; then adding 150g of alcohol solvent; the titanium tetrachloride is an alcoholic solution with the mass fraction of 4%; the copper chloride is an alcoholic solution with the mass fraction of 1.5%; the aluminum chloride is an alcohol solution with the mass fraction of 2%; the ethyl orthosilicate is an alcoholic solution with the mass fraction of 1.6%; the stannic chloride is an alcoholic solution with the mass fraction of 5%; the alcohol solvent is n-butyl alcohol, and the mass fraction of ethanol is 1: 1, a mixed solvent;
s2, solvothermal synthesis: the temperature is 240 ℃, the pressure is 8Mpa, and the reaction time is 1.2 h;
s3, drying and roasting: drying at 20-30 deg.C for 48h, maintaining at 70 deg.C for 48h in a vacuum drying oven, and calcining in a muffle furnace to obtain No. 4 nanometer aerogel.
Nano aerogel example 5:
s1, uniformly mixing and stirring the raw materials: mixing the following raw materials in parts by weight: 130.6g, copper chloride: 25.4g, aluminum chloride: 78.2g, ethyl orthosilicate: 86.7g, 5g of stannic chloride; then 300g of alcohol solvent is added; the titanium tetrachloride is an alcohol solution with the mass fraction of 6%; the copper chloride is an alcohol solution with the mass fraction of 2.5%; the aluminum chloride is an alcoholic solution with the mass fraction of 4%; the ethyl orthosilicate is an alcoholic solution with the mass fraction of 2.4%; the stannic chloride is an alcoholic solution with the mass fraction of 5%; the alcohol solvent is ethanol, and the mass fraction of isopropanol is 1: 1, a mixed solvent;
s2, solvothermal synthesis: the temperature is 240 ℃ and 250 ℃, the pressure is 8-12Mpa, and the reaction time is 0.8-1.2 h;
s3, drying and roasting: drying at 20-30 deg.C for 48h, maintaining at 70 deg.C for 48h in a vacuum drying oven, and calcining in a muffle furnace to obtain No. 5 nanometer aerogel.
Nano aerogel example 6:
s1, uniformly mixing and stirring the raw materials: mixing the following raw materials in parts by weight: 112.8g, copper chloride: 21.2g, aluminum chloride: 65.2g, 3g of stannic chloride; ethyl orthosilicate: 69.4g, then 225g of alcohol solvent is added; the titanium tetrachloride is an alcohol solution with the mass fraction of 5%; the copper chloride is an alcohol solution with the mass fraction of 2%; the aluminum chloride is an alcoholic solution with the mass fraction of 3%; the ethyl orthosilicate is an alcoholic solution with the mass fraction of 2%; the stannic chloride is an alcoholic solution with the mass fraction of 5%; the alcohol solvent is n-butanol, ethanol and isopropanol, and the mass fraction of the alcohol solvent is 1: 1: 1, a mixed solvent;
s2, solvothermal synthesis: the temperature is 245 ℃, the pressure is 10Mpa, and the reaction time is 1 h;
s3, drying and roasting: drying at 20-30 deg.C for 48h, maintaining at 70 deg.C for 48h in a vacuum drying oven, and calcining in a muffle furnace to obtain No. 6 nanometer aerogel.
The properties of the 1-6 nanometer aerogel are characterized as shown in the following table 1:
TABLE 1
| Product(s) | Apparent density (g/cm)-3) | Porosity (%) |
| No. 1 nano aerogel | 0.17 | 92 |
| No. 2 nano aerogel | 0.19 | 89 |
| No. 3 nano aerogel | 0.19 | 88 |
| No. 4 nano aerogel | 0.15 | 95 |
| No. 5 nano aerogel | 0.16 | 94 |
| No. 6 nano aerogel | 0.16 | 94 |
From the experimental data in table 1, it can be seen that tin chloride has a better effect in increasing the porosity and the fluffiness of the aerogel.
Light plastering gypsum synthesis example:
light plastering gypsum example 1:
s01: grinding the desulfurized gypsum with the average grain diameter of 50 mu m for 30min by a ball mill and then drying;
s02: taking out 40g of gypsum processed by S01 and 10g of limestone with the average grain size of 30 mu m; 5g of nano aerogel; 0.5g of polyvinyl alcohol; 0.02g of organic acid and soluble salt retarder sodium citrate; 0.1g of methyl cellulose; 5g of vitrified micro bubbles are mixed to prepare premixed powder;
s03: and (3) fully and uniformly mixing the premixed powder with 1g of vinyl acetate and ethylene copolymerized rubber powder to obtain the light plastering gypsum.
S04: the sample No. 1 detects related parameters according to the method of GB/T28627-2012 plastering gypsum.
Coating example 2:
s01: grinding the desulfurized gypsum with the average grain diameter of 60 mu m for 40min by a ball mill and then drying;
s02: taking 50g of the gypsum processed by S01 out, and 15g of limestone with the average grain size of 40 mu m; 6g of nano aerogel; 1.0g of water-soluble starch; 0.03g of citric acid; dextrin 0.25g and bentonite 0.25 g; 8g of expanded perlite is mixed to prepare premixed powder;
s03: and (3) fully and uniformly mixing the premixed powder with 1.5g of ethylene, vinyl chloride and vinyl metasilicate ternary copolymer rubber powder to obtain the light plastering gypsum.
S04: the sample No. 2 is used for detecting related parameters according to the method of GB/T28627-2012 plastering gypsum.
Coating example 3:
s01: grinding the desulfurized gypsum with the average grain size of 70 mu m for 50min by a ball mill and then drying;
s02: 60g of gypsum processed by S01 is taken out, and 20g of limestone with the average grain size of 50 mu m is taken out; 7g of nano aerogel; 1.5g of polyacrylamide; 0.04g of phosphate retarder; 0.2g of methyl cellulose and 0.3g of hydroxypropyl methyl cellulose; 10g of fly ash ceramsite is mixed to prepare premixed powder;
s03: and (3) fully and uniformly mixing the premixed powder with 2g of vinyl acetate homopolymerized rubber powder to obtain the light plastering gypsum.
S04: the sample No. 3 detects related parameters according to the method of GB/T28627-2012 plastering gypsum.
Coating example 4:
s01: grinding the desulfurized gypsum with the average grain diameter of 80 mu m for 60min by a ball mill and then drying;
s02: taking out 40g of gypsum processed by S01 and 15g of limestone with the average grain size of 60 mu m; 8g of nano aerogel; 0.1g of carboxymethyl cellulose and 0.4g of carboxymethyl hydroxyethyl cellulose; 0.02g of protein gypsum retarder; 0.2g of dextrin and 0.2g of bentonite; mixing 2g of vitrified micro bubbles and 4g of expanded perlite to prepare premixed powder;
s03: and (3) fully and uniformly mixing the premixed powder, 1.5g of acrylate and styrene copolymerized rubber powder to obtain the light plastering gypsum.
S04: the sample No. 4 detects related parameters according to the method of GB/T28627-2012 plastering gypsum.
Coating example 5:
s01: grinding the desulfurized gypsum with the average grain diameter of 90 mu m for 30min by a ball mill and then drying;
s02: 60g of gypsum processed by S01 is taken out, and 20g of limestone with the average grain size of 70 mu m is taken out; 9g of nano aerogel; 0.3g of polyvinyl alcohol, 0.4g of water-soluble starch and 0.5g of polyacrylamide; 0.02g of citric acid; 0.1g of methyl cellulose, 0.1g of dextrin and 0.2g of bentonite; mixing 2g of vitrified micro bubbles, 2g of expanded perlite and 4g of fly ash ceramsite to prepare premixed powder;
s03: and (3) fully and uniformly mixing the premixed powder with 1g of vinyl acetate and higher fatty acid vinyl ester copolymerized rubber powder to obtain the light plastering gypsum.
S04: the sample No. 5 detects related parameters according to the method of GB/T28627-2012 plastering gypsum.
Coating example 6:
s01: grinding the desulfurized gypsum with the average grain diameter of 100 mu m for 50min by a ball mill and then drying;
s02: taking 50g of the gypsum processed by S01 out, and 10g of limestone with the average grain size of 60 mu m; 10g of nano aerogel; 0.5g of carboxymethyl cellulose, 0.5g of water-soluble starch and 0.5g of polyacrylamide; 0.03g of sodium citrate; 0.15g of dextrin and 0.05g of bentonite; mixing 2g of expanded perlite and 5g of fly ash ceramsite to prepare premixed powder;
s03: and (3) fully and uniformly mixing the premixed powder with 1.5g of vinyl acetate, ethylene and higher fatty acid vinyl ester terpolymer rubber powder to obtain the light plastering gypsum.
S04: the sample No. 6 detects related parameters according to the method of GB/T28627-2012 plastering gypsum.
Coating example 7:
s01: grinding the desulfurized gypsum with the average grain diameter of 60 mu m for 40min by a ball mill and then drying;
s02: taking out 40g of gypsum processed by S01, and 20g of limestone with the average grain size of 40 mu m; 9g of nano aerogel; 0.2g of polyvinyl alcohol, 0.1g of water-soluble starch, 0.1g of polyacrylamide and 0.1g of carboxymethyl cellulose; 0.02g of protein retarder; 0.2g of dextrin and 0.1g of bentonite; 8g of vitrified micro bubbles are mixed to prepare premixed powder;
s03: and (3) fully and uniformly mixing the premixed powder with 1g of vinyl acetate and ethylene copolymerized rubber powder to obtain the light plastering gypsum.
S04: the sample No. 7 detects related parameters according to the method of GB/T28627-2012 plastering gypsum.
Coating example 8:
s01: grinding the desulfurized gypsum with the average grain diameter of 80 mu m for 60min by a ball mill and then drying;
s02: taking out 50g of the gypsum processed by S01 and 10g of limestone with the average grain size of 50 mu m; 7g of nano aerogel; 0.2g of polyvinyl alcohol, 0.1g of water-soluble starch, 0.1g of polyacrylamide and 0.1g of carboxymethyl hydroxyethyl cellulose; 0.03g of phosphate retarder; 0.2g of dextrin and 0.1g of bentonite; mixing 9g of expanded perlite to prepare premixed powder;
s03: and (3) fully and uniformly mixing the premixed powder with 1g of vinyl acetate and ethylene copolymerized rubber powder to obtain the light plastering gypsum.
S04: the sample No. 7 detects related parameters according to the method of GB/T28627-2012 plastering gypsum.
TABLE 2
The content of the water-retaining agent in the light plastering gypsum has great influence on the water retention rate, and the higher the content of the water-retaining agent is, the higher the water retention rate of the light plastering gypsum is; the content and the grain size of main components of gypsum and limestone in the light plastering gypsum have great influence on the compressive strength and the breaking strength, and the more the content of the gypsum and the limestone is, the stronger the compressive strength and the breaking strength in the light plastering gypsum are; the content of the tackifier and the redispersible latex powder has influence on the bonding strength value; the retarder mainly influences the length of the setting time.
In addition, the light plastering gypsum obtained in examples 1 to 8 is diluted with water, stirred uniformly, coated on the inner wall of a cube box with the inner wall area of 50cmx50cmx50cm, the coating thickness is 2 to 3mm, and then the formaldehyde concentration is enabled to be 0.1g/m by spraying formaldehyde after the inner wall of the box is dried3Left and right, and then left to stand for 48 hours, the formaldehyde concentration was measured, and a blank group and a comparative box were set, wherein the light plastering gypsum used in comparative box 1 was the formulation disclosed in CN105669152B, and the formulation disclosed in CN106458758A was used in comparative box 2, and the results are shown in table 3 below.
TABLE 3
| Original concentration (mg/m)3) | Post concentration (mg/m)3) | Original/after concentration | |
| Blank group | 98 | 4.5 | 22 |
| No. 1 box | 98 | 0.16 | 613 |
| No. 2 box | 95 | 0.10 | 950 |
| No. 3 box | 97 | 0.11 | 882 |
| No. 4 box | 98 | 0.08 | 1225 |
| No. 5 box | 99 | 0.06 | 1650 |
| No. 6 box | 96 | 0.04 | 2400 |
| No. 7 box | 99 | 0.05 | 1980 |
| No. 8 box | 98 | 0.10 | 980 |
| Comparison Box 1 | 98 | 0.22 | 445 |
| Comparison box 2 | 99 | 0.19 | 521 |
From the above, the treatment efficiency of the coating for formaldehyde is greatly improved; the most important component playing a role in decomposing formaldehyde is nano aerogel, and after tin chloride is added into the nano aerogel, the formaldehyde treatment efficiency is greatly improved due to the increase of the pore structure; in addition, through the comparison of the experimental results of No. 3 box and No. 8 box, the modified bentonite is added into the water-retaining agent in the light plastering gypsum, and the treatment efficiency of formaldehyde is also improved to a certain extent. Experimental data show that the light plastering gypsum has a faster decomposition rate on formaldehyde.
The above-described embodiments should not be construed as limiting the scope of the invention, and any alternative modifications or alterations to the embodiments of the present invention will be apparent to those skilled in the art.
The present invention is not described in detail, but is known to those skilled in the art.
Claims (9)
1. The utility model provides a light gypsum that plasters that can effectively decompose formaldehyde which characterized in that: the paint comprises the following components in parts by mass: 5-10 parts of nano aerogel; 40-60 parts of gypsum; 10-20 parts of limestone; 0.5-1.5 parts of tackifier; 0.02-0.04 part of retarder; 0.1-0.5 part of water-retaining agent; 5-10 parts of light filler; 1-2 parts of redispersible latex powder; the nano aerogel comprises the following components in parts by weight: 15-25 parts of nano silicon dioxide, 40-55 parts of titanium oxide, 10-15 parts of copper oxide and 20-30 parts of aluminum oxide; 1-5 parts of tin chloride; the nano aerogel is prepared by the following steps: the nano aerogel is prepared by mixing 1-5 parts by mass of tin chloride, 95-130.6 parts by mass of titanium tetrachloride, 17-25.4 parts by mass of copper chloride, 52.2-78.2 parts by mass of aluminum chloride and 52-86.7 parts by mass of ethyl orthosilicate, and then putting the mixture into 300 parts by mass of alcohol solvent, and drying and roasting the mixture by adopting a solvothermal method.
2. The lightweight plastering gypsum capable of effectively decomposing formaldehyde according to claim 1, wherein: the temperature of the solvothermal method is 240 ℃ and 250 ℃, the pressure is 8-12Mpa, and the reaction time is 0.8-1.2 h.
3. The lightweight plastering gypsum capable of effectively decomposing formaldehyde according to claim 1, wherein: the titanium tetrachloride is an alcoholic solution with the mass fraction of 4-6%; the copper chloride is an alcoholic solution with the mass fraction of 1.5-2.5%; the aluminum chloride is an alcohol solution with the mass fraction of 2-4%; the ethyl orthosilicate is an alcoholic solution with the mass fraction of 1.6-2.4%; the alcohol solvent is n-butanol and/or ethanol and/or isopropanol.
4. Root of herbaceous plantThe lightweight plastering gypsum capable of effectively decomposing formaldehyde as claimed in claim 1, wherein: the gypsum is desulfurized gypsum, and the particle size of the gypsum is 50-100 mu m; the particle size of the limestone is 30-70 μm; the redispersible latex powder is one or more than two of ethylene/vinyl acetate copolymer, vinyl acetate/vinyl versatate copolymer and acrylic acid copolymer, the mixture ratio is arbitrary when the two or more than two are mixed, and the bulk density of the redispersible latex powder is 500 kg/m-3。
5. The lightweight plastering gypsum capable of effectively decomposing formaldehyde according to claim 1, wherein: the tackifier is one or a mixture of more than two of polyvinyl alcohol, water-soluble starch, polyacrylamide, carboxymethyl cellulose and carboxymethyl hydroxyethyl cellulose, and the mixture of more than two is in any proportion; the light filler is one or a mixture of more than two of vitrified micro bubbles, expanded perlite and fly ash ceramsite, and the mixture of more than two is in any proportion; the bulk density of the light filler is 80-120kg/m3(ii) a The retarder is one or more than two of organic acid and soluble salts thereof, phosphates and protein gypsum retarder, and the mixture ratio of the two or more than two is arbitrary.
6. The lightweight plastering gypsum capable of effectively decomposing formaldehyde according to claim 1, wherein: the water-retaining agent is one or the mixture of more than two of methylcellulose, hydroxypropyl methylcellulose, hydroxyethyl methylcellulose, dextrin and bentonite, the mixture ratio of the two is arbitrary, and the viscosity of the water-retaining agent is more than 10000 Mpa.s.
7. The lightweight plastering gypsum capable of effectively decomposing formaldehyde according to claim 6, wherein: the water-retaining agent is a mixture of dextrin and bentonite, and the mass ratio of the dextrin to the bentonite is 1-10: 5.
8. The lightweight plastering gypsum capable of effectively decomposing formaldehyde according to claim 7, wherein: the bentonite is modified bentonite.
9. The lightweight plastering gypsum capable of effectively decomposing formaldehyde according to claim 8, wherein: the modified bentonite is prepared by adopting the following method: mixing sodium-based organic bentonite and hexadecyl trimethyl ammonium bromide or hexadecyl trimethyl ammonium chloride according to the mass ratio of 5: 1.5-2.5, adding distilled water, continuously stirring for 1-4 h, filtering, washing with water until no bromine or chlorine exists in the cleaned water, and drying the filter cake to obtain the modified organic bentonite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810901434.7A CN108751902B (en) | 2018-08-09 | 2018-08-09 | Light plastering gypsum capable of effectively decomposing formaldehyde |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810901434.7A CN108751902B (en) | 2018-08-09 | 2018-08-09 | Light plastering gypsum capable of effectively decomposing formaldehyde |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108751902A CN108751902A (en) | 2018-11-06 |
| CN108751902B true CN108751902B (en) | 2021-06-04 |
Family
ID=63969496
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810901434.7A Active CN108751902B (en) | 2018-08-09 | 2018-08-09 | Light plastering gypsum capable of effectively decomposing formaldehyde |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108751902B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111606669B (en) * | 2019-06-06 | 2021-12-17 | 中建材创新科技研究院有限公司 | Gypsum board and preparation method thereof |
| CN111606671A (en) * | 2019-06-20 | 2020-09-01 | 中建材创新科技研究院有限公司 | Plastering gypsum capable of purifying air and preparation method thereof |
| CN111606670A (en) * | 2019-06-20 | 2020-09-01 | 中建材创新科技研究院有限公司 | Caulking gypsum capable of purifying air and preparation method thereof |
| CN110550926A (en) * | 2019-09-03 | 2019-12-10 | 贵州福泉蓝图住宅产业化有限公司 | Formaldehyde-removing plastering gypsum and preparation method thereof |
| CN111233423A (en) * | 2020-03-16 | 2020-06-05 | 浙江古思建筑科技有限公司 | Lightweight plastering gypsum and using method thereof |
| CN113956907B (en) * | 2021-09-28 | 2023-10-03 | 辽宁天宝华瑞建材有限公司 | High-sulfur coal sulfur-fixing agent and preparation method thereof |
| CN115340351A (en) * | 2022-07-11 | 2022-11-15 | 浙江华德新材料有限公司 | High-strength antibacterial formaldehyde-removing light plastering anhydrite material and preparation and use method thereof |
| CN115368097B (en) * | 2022-08-22 | 2023-05-05 | 湖北大学 | High-capacity carbon-fixing material and preparation method thereof |
| CN117658579B (en) * | 2023-12-08 | 2024-07-02 | 邢台学院 | Mixed phase type plastering gypsum and preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4076868A (en) * | 1973-11-09 | 1978-02-28 | Wacker-Chemie Gmbh | Rendering building materials hydrophobic |
| CN102876147A (en) * | 2012-09-29 | 2013-01-16 | 大连工业大学 | Composite air purification coating material and preparation method thereof |
| CN104496388A (en) * | 2014-12-26 | 2015-04-08 | 上海每天节能环保科技股份有限公司 | Lightweight bottom layer plastering gypsum |
| CN104941538A (en) * | 2015-06-03 | 2015-09-30 | 金承黎 | In-situ composite silicon-based multibasic oxide oxide aerogel material and preparation method thereof |
| CN108264318A (en) * | 2018-01-24 | 2018-07-10 | 合肥市大卓电力有限责任公司 | A kind of waterproof brushing gypsum and preparation method thereof |
-
2018
- 2018-08-09 CN CN201810901434.7A patent/CN108751902B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4076868A (en) * | 1973-11-09 | 1978-02-28 | Wacker-Chemie Gmbh | Rendering building materials hydrophobic |
| CN102876147A (en) * | 2012-09-29 | 2013-01-16 | 大连工业大学 | Composite air purification coating material and preparation method thereof |
| CN104496388A (en) * | 2014-12-26 | 2015-04-08 | 上海每天节能环保科技股份有限公司 | Lightweight bottom layer plastering gypsum |
| CN104941538A (en) * | 2015-06-03 | 2015-09-30 | 金承黎 | In-situ composite silicon-based multibasic oxide oxide aerogel material and preparation method thereof |
| CN108264318A (en) * | 2018-01-24 | 2018-07-10 | 合肥市大卓电力有限责任公司 | A kind of waterproof brushing gypsum and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108751902A (en) | 2018-11-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108751902B (en) | Light plastering gypsum capable of effectively decomposing formaldehyde | |
| CN103613328A (en) | Ecological diatom ooze decorative wall material | |
| CN108299956B (en) | Formaldehyde-removing odor-removing sealing agent and preparation method thereof | |
| CN110423083A (en) | A kind of multi-function plaster base mortar and preparation method thereof | |
| CN109776055B (en) | Multifunctional environment-friendly zeolite diatom ooze interior wall coating | |
| CN107697952A (en) | For removing preparation method of manganese bioxide material of low concentration formaldehyde and products thereof and application in air | |
| CN106118141A (en) | A kind of inorganic polymeric coating with zeolite as adsorbent and preparation method | |
| CN108558381A (en) | A kind of the diatomite nogging and preparation method of high-efficient purification room air | |
| CN109336512B (en) | Nano metal organic framework wall material and preparation method thereof | |
| CN113231009A (en) | Ammonia adsorbent and preparation method thereof | |
| CN105622017B (en) | Unburned diatom ecological brick and its production method | |
| CN107859258B (en) | A kind of air cleaning and environment-friendly type diatom ooze wallpaper and preparation method | |
| CN111116147A (en) | Diatom ooze for efficient air purification and preparation method thereof | |
| CN107376904B (en) | Catalyst for removing formaldehyde and TVOC at room temperature and preparation method thereof | |
| CN113529493B (en) | Wallpaper for photocatalytic synergistic decomposition of formaldehyde and preparation method thereof | |
| CN106280660A (en) | A kind of neutral water-resistant putty | |
| CN106747264B (en) | A kind of roll-on-type diatom ooze and preparation method thereof | |
| CN110590227A (en) | Diatom ooze capable of efficiently and durably removing formaldehyde and preparation method thereof | |
| CN110105827B (en) | Inorganic fireproof decorative material capable of releasing negative oxygen ions and preparation method thereof | |
| CN111484304A (en) | Negative oxygen ion dry powder coating and preparation method thereof | |
| CN109569286B (en) | Attapulgite clay composite formaldehyde purifying ball and preparation method thereof | |
| CN108745351B (en) | Composite aerogel material with room-temperature formaldehyde removal performance and application thereof | |
| CN109054076B (en) | Preparation method of three-dimensional porous modified starch, obtained product and application | |
| JPH08277110A (en) | Preparation of milk of lime | |
| CN105214440A (en) | A kind of tartary buckwheat shell with function of removing formaldehyde and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |