CN112430030B - Long-acting aldehyde-removing composite antibacterial joint mixture - Google Patents
Long-acting aldehyde-removing composite antibacterial joint mixture Download PDFInfo
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- 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
- C04B28/02—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 hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
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- 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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
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- 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
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- 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
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00663—Uses not provided for elsewhere in C04B2111/00 as filling material for cavities or the like
- C04B2111/00672—Pointing or jointing materials
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- 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
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/2092—Resistance against biological degradation
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- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
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- 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
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Abstract
The invention provides a composite antibacterial joint mixture for long-acting aldehyde removal, which comprises the following raw materials in parts by weight: 30 to 40 portions of Portland cement, 40 to 50 portions of calcium carbonate filler, 0.1 to 0.3 portion of cellulose ether, 0.1 to 0.3 portion of organic silicon water repellent, 0.1 to 0.3 portion of dry powder defoamer, 0.1 to 0.5 portion of alkali-flooding resistant agent, 5 to 10 portions of redispersible latex powder and 10 to 18 portions of composite formaldehyde-removing material; the composite aldehyde-removing material comprises TiO 2 White carbon black composite photocatalytic material and TiO 2 At least one of diatomite composite photocatalytic materials. The composite formaldehyde-removing material degrades formaldehyde through photocatalysis, and a healthy and comfortable indoor environment is created. In addition, tiO in the composite aldehyde-removing material 2 The organic silicon water repellent agent is added, so that the surface hydrophobicity of the product is improved, and water vapor accumulation is prevented, thereby reducing bacterial breeding and creating a healthy indoor environment.
Description
Technical Field
The invention belongs to the technical field of building materials, and particularly relates to a composite antibacterial joint mixture capable of removing aldehyde for a long time.
Background
Artificial boards such as plywood, core board, medium density fiberboard and particle board used as interior decoration; furniture made of artificial boards.
The joint mixture is a common building material and is used for the seam decoration of materials such as ceramic tiles, mosaics, stones, wood boards, glass, aluminum-plastic plates and the like. The joint mixture can perfectly repair the cracking or the damage of the ground surface, can be prepared by self, has rich colors, and has practical value and decorative value. Along with the development of society and the improvement of living standard, people have higher and higher requirements on living environment, on one hand, the living environment is required to be beautiful, the dosage of decorative materials such as decorative ceramic tiles, mosaics or stones is more and more, and the dosage of the matched ceramic wall and floor tile joint mixture is also considerable.
With the development of the building industry, formaldehyde in indoor air has become a main pollutant affecting human health. The formaldehyde has great harm to human bodies, seriously threatens human life, and particularly has the greatest harm to human bodies in air in winter. The formaldehyde source in domestic air mainly comprises the following aspects: at present, a large amount of organic adhesives, paint and the like are used for interior decoration, and a large amount of toxic substances such as formaldehyde, benzene and the like are contained in the interior decoration; the indoor insulating material is aged under the action of light and heat and can release formaldehyde; some manufacturers use unqualified plates for pursuing profit, or use poor glue when adhering veneering materials, and the formaldehyde in the plates and the glue seriously exceeds the standard.
Disclosure of Invention
The invention aims to provide a composite antibacterial joint mixture capable of removing aldehyde for a long time so as to effectively relieve formaldehyde pollution in an indoor environment.
According to one aspect of the invention, the composite antibacterial gap filler capable of removing aldehyde for a long time is provided, and comprises the following raw materials in parts by weight: 30 to 40 portions of Portland cement, 40 to 50 portions of calcium carbonate filler, 0.1 to 0.3 portion of cellulose ether, 0.1 to 0.3 portion of organic silicon water repellent, 0.1 to 0.3 portion of dry powder defoamer, 0.1 to 0.5 portion of alkali-flooding resistant agent, 5 to 10 portions of redispersible latex powder and 10 to 18 portions of composite formaldehyde-removing material; the composite aldehyde-removing material comprises TiO 2 White carbon black composite photocatalytic material and TiO 2 At least one of diatomite composite photocatalytic materials. Preferably, the portland cement is selected from at least one of portland cement No. 42.5 or portland cement No. 52.5.
The composite formaldehyde-removing material adopted by the long-acting formaldehyde-removing composite antibacterial joint mixture provided by the invention can effectively adsorb formaldehyde in indoor environment and degrade the formaldehyde into formic acid under the catalysis of natural light or artificial light, so that the formaldehyde and peculiar smell in the indoor environment are effectively reduced, a healthy and comfortable indoor environment is created, the whole degradation process is energy-saving and environment-friendly, and no harmful substance is separated out. Besides, the TiO in the aldehyde-removing composite material 2 And the joint mixture also has good sterilization and bacteriostasis capabilities, so that the joint mixture has the antibacterial capability. Meanwhile, the organic silicon water repellent is added into the gap filler, so that the surface hydrophobicity of the product is improved, water vapor accumulation is prevented, bacterial breeding is reduced, and a healthy indoor environment is created.
Preferably, the calcium carbonate-based filler is heavy calcium carbonate powder. Preferably, the heavy calcium powder is selected from one of 200 mesh heavy calcium powder, 400 mesh heavy calcium powder or 800 mesh heavy calcium powder.
Preferably, the dispersible latex powder comprises at least one of ethylene-vinyl acetate copolymer, vinyl acetate-ethylene versatate copolymer and acrylic acid copolymer.
Preferably, the effective components of the dry powder defoaming agent comprise dimethyl silicone oil and silicone resin; the organosilicon hydrophobic agent is an organosilane hydrophobic agent; the effective component of the anti-flooding agent comprises amorphous silica. Optionally, the dry powder defoaming agent is defoaming powder refined from dimethyl silicone oil, silicone resin, a carrier and a compounding auxiliary agent. Alternatively, the above-mentioned anti-flooding agent is a product containing highly active amorphous silica and an adsorbent.
Preferably, the cellulose ether comprises at least one of hydroxyethyl methyl cellulose ether, hydroxypropyl methyl cellulose ether. Preferably, the viscosity of the cellulose ether is from 100000 to 200000 mPas. Hydroxyethyl methyl cellulose ether and hydroxypropyl methyl cellulose ether have higher water retention thickening effect, can slow down the speed of water molecule volatilization in the cement of adding, improve the ductility of gap filler, easily construction, in addition, help the cement hydration process, reinforcing cement intensity.
Preferably, the composite aldehyde-removing material is TiO 2 White carbon black composite photocatalytic material. TiO 2 2 The loading amounts of the white carbon black and the TiO are different in different carriers, so that the white carbon black is easy to react with the TiO 2 And (3) bonding, and simultaneously, the surface of the white carbon black contains a large amount of-OH, so that a large amount of photocatalytic active sites are formed on the surface of the white carbon black. In conclusion, the white carbon black is used as TiO of the carrier 2 The white carbon black composite photocatalytic material has excellent photocatalytic activity.
Preferably, the composite aldehyde-removing material is TiO modified by doping bismuth-containing compound 2 White carbon black composite photocatalytic material. The bismuth-containing compound has a narrow forbidden band width and a visible light absorption characteristic, and can be doped into the titanium dioxide type photocatalytic material, so that the effective excitation wavelength of the photocatalyst can be extended to a visible light region, the utilization rate of natural light is improved, and the photocatalytic degradation efficiency of formaldehyde is improved.
Preferably, the bismuth-containing compound is selected from BiVO 4 、BiNbO 4 、Bi 2 MoO 6 、Bi 2 WO 6 At least one of (a).
Preferably, the bismuth-containing compound is BiNbO 4 . P-type semiconductor BiNbO 4 And N-type semiconductor TiO 2 The p-n heterojunction structure is formed, and the responsiveness of the photocatalytic composite material to visible light is remarkably improved.
Preferably, the composite aldehyde removal material is modified TiO co-doped by nano silver and tungstate 2 White carbon black composite photocatalytic material. The nano silver has a remarkable plasma surface effect, can regulate and control the surface resonance effect of the photocatalytic composite material, can promote the effective separation of photo-generated electron-hole pairs, reduces the energy barrier of formaldehyde photocatalytic degradation, and improves the effective utilization rate of the photocatalytic composite material to visible light. On the other hand, the nano silver has excellent sterilization and bacteriostasis characteristics, and the antibacterial effect of the joint mixture can be further optimized.
Detailed Description
In order to make those skilled in the art better understand the technical solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Example 1
1. Preparation of composite aldehyde-removing material
The raw materials for synthesizing the composite aldehyde-removing material are shown in table 1, and the materials shown in table 1 are all obtained commercially.
TABLE 1 raw materials for synthesizing composite aldehyde-removing material
(1)TiO 2 Preparation of white carbon black composite photocatalytic material
S1, dispersing white carbon black in pure water, and adding TiCl into the pure water at 0-2 DEG C 4 Solution (according to 30% TiO) 2 The charge amount is calculated according to the charge amount), and then slowly dropwise adding (NH) into the reaction system 4 ) 2 SO 4 Solution (Ti) 4+ ：SO 4 2- = 1), heating to 50 ℃, and keeping the temperature for 10 minutes, wherein stirring is continuously carried out in the period;
s2, filtering and washing the obtained material, drying the obtained solid, and then placing the solid in a high-temperature furnace to calcine the solid for 2 hours at the temperature of 600 ℃.
(2)TiO 2 Preparation of diatomite composite photocatalytic material
S1, dispersing diatomite in pure water, and adding TiCl into the diatomite at a temperature of between 0 and 2 DEG C 4 Solution (according to 30% TiO) 2 The charge amount is calculated according to the load amount), and then the mixture is slowly dripped into the reaction system (NH) 4 ) 2 SO 4 Solution (Ti) 4+ ：SO 4 2- = 1), heating to 50 ℃, and keeping the temperature for 10 minutes while stirring continuously;
s2, filtering and washing the obtained material, drying the obtained solid, and then placing the solid in a high-temperature furnace to calcine for 2 hours at 600 ℃.
(3)BiVO 4 -TiO 2 Preparation of white carbon black composite photocatalytic material
S1, dispersing white carbon black in pure water, and adding TiCl into the pure water at 0-2 DEG C 4 Solution (in 30% TiO) 2 The charge amount is calculated according to the charge amount), and then slowly dropwise adding (NH) into the reaction system 4 ) 2 SO 4 Solution (Ti) 4+ ：SO 4 2- = 1), heating to 50 ℃, and keeping the temperature for 10 minutes, wherein stirring is continuously carried out in the period;
s2, transferring all materials in the S1 reaction system into a reaction kettle, and dropwise adding Bi (NO) into the reaction kettle under the stirring condition 3 ) 3 ·5H 2 O(Bi 3+ /Ti 4+ = 0.1) solution and Na 3 VO 4 ·12H 2 O(Bi 3+ ：VO 4 3- 1), covering a hydrothermal kettle with the solution;
s3, transferring the hydrothermal kettle into an oven, and reacting for 4 hours at 180 ℃;
and S4, filtering and washing the material obtained after the hydrothermal reaction is finished, drying the obtained solid, and then calcining the solid in a high-temperature furnace at 600 ℃ for 2 hours.
(4)BiNbO 4 -TiO 2 Preparation of white carbon black composite photocatalytic material
S1, dispersing white carbon black in pure water, and adding TiCl into the pure water at 0-2 DEG C 4 Solution (according to 30% TiO) 2 The charge amount is calculated according to the charge amount), and then slowly dropwise adding (NH) into the reaction system 4 ) 2 SO 4 Solution (Ti) 4+ ：SO 4 2- = 1), heating to 50 ℃, and keeping the temperature for 10 minutes, wherein stirring is continuously carried out in the period;
s2, transferring all materials in the S1 reaction system into a reaction kettle, and dropwise adding Bi (NO) into the reaction kettle under the stirring condition 3 ) 3 ·5H 2 O(Bi 3+ /Ti 4+ = 0.1) solution and Nb 2 O 5 Nitric acid solution (Bi) 3+ ：Nb 5+ 1), covering a hydrothermal kettle with the solution;
s3, transferring the hydrothermal kettle into an oven, and reacting for 3 hours at 200 ℃;
and S4, filtering and washing the material obtained after the hydrothermal reaction is finished, drying the obtained solid, and then placing the solid in a high-temperature furnace to calcine the solid for 2 hours at the temperature of 600 ℃.
(5)Bi 2 MoO 6 -TiO 2 Preparation of white carbon black composite photocatalytic material
S1, dispersing white carbon black in pure water, and adding TiCl into the pure water at 0-2 DEG C 4 Solution (according to 30% TiO) 2 The charge amount is calculated according to the load amount), and then the mixture is slowly dripped into the reaction system (NH) 4 ) 2 SO 4 Solution (Ti) 4+ ：SO 4 2- = 1), heating to 50 ℃, and keeping the temperature for 10 minutes, wherein stirring is continuously carried out in the period;
s2, transferring all materials in the S1 reaction system into a reaction kettle, and dropwise adding Bi (NO) into the reaction kettle under the stirring condition 3 ) 3 ·5H 2 O(Bi 3+ /Ti 4+ = 0.1) solution and (NH) 4 ) 6 MoO 6 ·4H 2 O(Bi 3+ ：MoO 6 6- 1), covering a hydrothermal kettle with the solution;
s3, transferring the hydrothermal kettle into an oven, and reacting for 4 hours at 160 ℃;
and S4, filtering and washing the material obtained after the hydrothermal reaction is finished, drying the obtained solid, and then calcining the solid in a high-temperature furnace at 600 ℃ for 2 hours.
(6)Bi 2 WO 6 -TiO 2 Preparation of white carbon black composite photocatalytic material
S1, dispersing white carbon black in pure water, and adding TiCl into the pure water at 0-2 DEG C 4 Solution (according to 30% TiO) 2 The charge amount is calculated according to the load amount), and then the mixture is slowly dripped into the reaction system (NH) 4 ) 2 SO 4 Solution (Ti) 4+ ：SO 4 2- = 1), heating to 50 ℃, and keeping the temperature for 10 minutes, wherein stirring is continuously carried out in the period;
s2, transferring all materials in the S1 reaction system into a reaction kettle, and dropwise adding Bi (NO) into the reaction kettle under the stirring condition 3 ) 3 ·5H 2 O(Bi 3+ /Ti 4+ = 0.1) solution and (NH 4 ) 10 H 2 (W 2 O 7 ) 6 (Bi 3+ ：W 2 O 7 2- 1), covering a hydrothermal kettle with the solution;
s3, transferring the hydrothermal kettle into an oven, and reacting for 5.5 hours at 160 ℃;
and S4, filtering and washing the material obtained after the hydrothermal reaction is finished, drying the obtained solid, and then calcining the solid in a high-temperature furnace at 600 ℃ for 2 hours.
(7)Ag-BiNbO 4 -TiO 2 White carbon black composite photocatalytic material
S1, dispersing white carbon black in pure water, and adding TiCl into the pure water at 0-2 DEG C 4 Solution (in 30% TiO) 2 The charge amount is calculated according to the charge amount), and then slowly dropwise adding (NH) into the reaction system 4 ) 2 SO 4 Solution (Ti) 4+ ：SO 4 2- = 1), heating to 50 ℃, and keeping the temperature for 10 minutes while stirring continuously;
s2, transferring all materials in the S1 reaction system into a reaction kettle, and dropwise adding Bi (NO) into the reaction kettle under the stirring condition 3 ) 3 ·5H 2 O(Bi 3+ /Ti 4+ = 0.1) solution and Nb 2 O 5 Nitric acid solution (Bi) 3+ ：Nb 5+ 1), and nano silver (Ag + /Ti 4+ = 0.03) covering the hydrothermal kettle;
s3, transferring the hydrothermal kettle into an oven, and reacting for 3 hours at 200 ℃;
and S4, filtering and washing the material obtained after the hydrothermal reaction is finished, drying the obtained solid, and then placing the solid in a high-temperature furnace to calcine the solid for 2 hours at the temperature of 600 ℃.
2. Preparation of composite antibacterial joint mixture
The 7 composite photocatalytic materials prepared by the embodiment and the nano TiO which is purchased at present 2 (Aladdin) is respectively used as an aldehyde removing material in the formula to respectively prepare 8 composite antibacterial caulking agents. The formula of the composite antibacterial caulking agent is shown in table 2.
TABLE 2 formulation composition of composite antibacterial caulking agent
Preparing materials according to the table 2, and preparing the composite antibacterial caulking agent according to the following steps:
s1, adding portland cement and heavy calcium carbonate powder into a kettle of a gravity-free mixer;
s2, adding the required residual materials except the aldehyde materials in the formula into a kettle, and mixing at a high speed until the materials are uniform;
s3, finally adding a formaldehyde removing material into the kettle, and mixing at a high speed for 20min;
s4, discharging the powder material to obtain uniform powder material without agglomeration.
According to different adopted aldehyde-removing materials, the prepared 8 composite antibacterial joint fillers are respectively marked as joint filler A, joint filler B, joint filler C, joint filler D, joint filler E, joint filler F, joint filler G and joint filler H, and the aldehyde-removing materials correspondingly adopted by the composite antibacterial joint fillers are shown in Table 3. In addition, the embodiment is also provided with a comparison joint mixture, the aldehyde-removing materials in the formula provided in the table 2 are removed, and the formula consisting of the residual materials is the formula composition of the comparison joint mixture.
TABLE 3 aldehyde-removing material correspondingly used in the composite antibacterial caulking agent prepared in the embodiment
| Composite antibacterial joint mixture | Aldehyde-removing material |
| Joint mixture A | TiO 2 White carbon black composite photocatalytic material |
| Joint mixture B | TiO 2 /diatomite composite photocatalytic material |
| Joint mixture C | BiVO 4 -TiO 2 White carbon black composite photocatalytic material |
| Joint mixture D | BiNbO 4 -TiO 2 White carbon black composite photocatalytic material |
| Joint mixture E | Bi 2 MoO 6 -TiO 2 White carbon black composite photocatalytic material |
| Joint mixture F | Bi 2 WO 6 -TiO 2 White carbon black composite photocatalytic material |
| Gap filler G | Ag-BiNbO 4 -TiO 2 White carbon black composite photocatalytic material |
| Joint mixture H | Nano TiO 2 2 |
3. Basic Performance test
The basic performance tests of the caulking agents A to G prepared in the embodiment are carried out according to JC/T1004-2017 CG1 type standard, and the test items and the corresponding test results are shown in Table 4.
TABLE 4 basic Performance testing of caulks A-G
4. Formaldehyde degradation experiment
And respectively brushing the joint mixtures A to H and the contrast joint mixture on the surface of the glass slide, forming a glue film on the surface of the glass slide after natural curing, and removing the glue film from the surface of the glass slide. The film to be tested was taken and the degradation rate of formaldehyde was determined by phenol reagent spectrophotometry in GB/T18204.26-2000 standard, the results are shown in Table 5. The aldehyde-removing material adopted by the gap filler H is single nano TiO 2 Compared with the gap filler H, the material adopts carrier (white carbon black or diatomite) and nano TiO 2 The joint mixture A-G of the composite formaldehyde-removing material can achieve a remarkably better formaldehyde degradation effect. The type of the carrier also influences the formaldehyde removal efficiency of the formaldehyde removal material, and compared with the gap filler B, the formaldehyde degradation rate of the gap filler A is higher, which indicates that the white carbon black is more suitable for serving as nano TiO than diatomite 2 The vector of (1). By comparing the formaldehyde degradation effects corresponding to the joint mixture C-F and the joint mixture A, the doping of the bismuth-containing compound can also improve the formaldehyde removing capability of the formaldehyde removing materialBiVO adopted 4 、BiNbO 4 、Bi 2 MoO 6 And Bi 2 WO 6 Has smaller forbidden band width, and is doped in nano TiO 2 In the method, the effective excitation wavelength of the photocatalytic reaction can be widened to a visible light region, the utilization rate of the aldehyde removing material to natural light is improved, and the formaldehyde degradation efficiency is improved. Among the joint sealants C to F, the joint sealant D has the best formaldehyde degradation effect, i.e., biNbO among the 4 bismuth-containing compounds adopted in the present example 4 The formaldehyde degradation effect of the formaldehyde removing material can be optimized to the maximum extent. Further, by doping nano silver into the aldehyde removing material, the nano silver and the nano TiO adsorbed on the surface of the carrier 2 And resonance is formed between the bismuth-containing compounds, so that the formaldehyde degradation capability of the formaldehyde removing material can be further improved, and the formaldehyde degradation effects of the gap filler D and the gap filler G are compared.
TABLE 5 Formaldehyde degradation rate of caulk
5. Antibacterial experiments
And respectively brushing the joint fillers A-H and the contrast joint filler on the surface of the glass slide, forming a glue film on the surface of the glass slide after natural curing, removing the glue film from the surface of the glass slide, and detecting the antibacterial performance of the glue film formed by the joint filler to be tested by adopting a culture dish method. And (3) taking a glue film to be detected, irradiating for 24 hours under an ultraviolet lamp for sterilization and disinfection, and then spreading the glue film on the surface of the potato culture medium. Putting the suspension prepared from the strain into a spray bottle, uniformly spraying the suspension on the surface of the adhesive film, and standing for about 10 minutes; covering a culture medium cover, putting the culture medium cover into a light-transmitting incubator at 25 ℃, culturing for 2 days, 7 days, 14 days and 28 days respectively, observing the growth condition of the mould on the surface of the plastic film, and determining the antibacterial property of the plastic film according to GB/T1741-2007. The mildew rating was rated as: grade 0, no mould growth; grade 1, trace mould grows; grade 2, a small amount of mould grows; grade 3, mold spots are obvious; grade 4, obvious mould spots; and 5, growing a large amount of mould on the surface of the adhesive film. The results of the antibacterial experiments are shown in table 6, the joint mixture added with the aldehyde-removing material has a remarkable antibacterial effect, and particularly, in the antibacterial experiments, the mildew condition corresponding to the joint mixture G is the slightest, so that the antibacterial and bacteriostatic effects of the joint mixture can be further improved by adopting the nano silver doped aldehyde-removing material.
TABLE 6 results of the antibacterial test
Although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the true spirit and scope of the present invention. For example, the method can be used for planting in tailings or slopes with different rare earth element concentrations, improving various nutritional conditions of planting, adopting different harvesting modes and periods and the like. However, such similar changes and modifications are within the spirit of the present invention.
Claims (6)
1. The composite antibacterial joint mixture capable of removing aldehyde for a long time is characterized by comprising the following raw materials in parts by weight:
30 to 40 portions of Portland cement, 40 to 50 portions of calcium carbonate filler, 0.1 to 0.3 portion of cellulose ether, 0.1 to 0.3 portion of organic silicon water repellent, 0.1 to 0.3 portion of dry powder defoamer, 0.1 to 0.5 portion of alkali-flooding resistant agent, 5 to 10 portions of redispersible latex powder and 10 to 18 portions of composite formaldehyde-removing material;
the composite aldehyde-removing material is BiNbO 4 Doped modified TiO 2 White carbon black composite photocatalytic material;
the BiNbO 4 Doped modified TiO 2 The preparation method of the white carbon black composite photocatalytic material comprises the following steps:
s1, dispersing white carbon black in pure water at 0-2 ℃, according to 30% of TiO 2 Charge calculation charge to which TiCl was added 4 Solution, then is added into the reaction systemSlowly dropwise (NH) 4 ) 2 SO 4 Heating the solution to 50 deg.C, maintaining the temperature for 10 min while stirring, wherein Ti is added 4+ ：SO 4 2- 1 calculating the (NH) 4 ) 2 SO 4 The dropping amount of the solution;
s2, transferring all materials in the S1 reaction system into a reaction kettle, and dropwise adding Bi (NO) into the reaction kettle under the stirring condition 3 ) 3 ·5H 2 O solution and Nb 2 O 5 The hydrothermal kettle is covered with the nitric acid solution, wherein Bi is used 3+ /Ti 4+ =0.1 calculating the Bi (NO) 3 ) 3 ·5H 2 The dropwise addition of O solution in an amount of Bi 3+ /Nb 5+ 1 calculating the Nb 2 O 5 The dropping amount of the nitric acid solution;
s3, transferring the hydrothermal kettle into an oven, and reacting for 3 hours at 200 ℃;
and S4, filtering and washing the material obtained after the hydrothermal reaction is finished, drying the obtained solid, and then placing the solid in a high-temperature furnace to calcine the solid for 2 hours at the temperature of 600 ℃.
2. The composite antibacterial caulking agent for removing aldehyde in long-acting manner according to claim 1, wherein: the calcium carbonate filler is coarse whiting powder.
3. The composite antibacterial caulking agent for removing aldehyde in long-acting manner according to claim 1, wherein: the redispersible latex powder comprises at least one of ethylene-vinyl acetate copolymer, vinyl acetate-ethylene versatate copolymer and acrylic acid copolymer.
4. The composite antibacterial caulking agent for removing aldehyde in long-acting manner according to claim 1, wherein:
the active ingredients of the dry powder defoaming agent comprise dimethyl silicone oil and silicone resin;
the organic silicon water repellent is an organic silane water repellent;
the active ingredient of the anti-flooding agent comprises amorphous silicon dioxide.
5. The composite antibacterial caulking agent for long-acting aldehyde removal according to claim 1, wherein: the cellulose ether comprises at least one of hydroxyethyl methyl cellulose ether and hydroxypropyl methyl cellulose ether.
6. The composite antibacterial joint mixture for long-acting aldehyde removal according to claim 1, wherein the composite aldehyde removal material is Ag-BiNbO 4 -TiO 2 White carbon black composite photocatalytic material;
the Ag-BiNbO 4 -TiO 2 The preparation method of the white carbon black composite photocatalytic material comprises the following steps:
step one, dispersing white carbon black in pure water, at 0-2 ℃, according to 30% of TiO 2 Charge calculation charge to which TiCl was added 4 The solution is slowly added dropwise into the reaction system 4 ) 2 SO 4 Heating the solution to 50 deg.C, maintaining the temperature for 10 min while stirring, wherein Ti is added 4+ ：SO 4 2- 1 calculating the (NH) 4 ) 2 SO 4 The dropping amount of the solution;
step two, transferring all materials in the reaction system in the step one into a reaction kettle, and dripping Bi (NO) into the reaction kettle under the condition of stirring 3 ) 3 ·5H 2 O solution and Nb 2 O 5 The nitric acid solution and the nano silver are covered on the hydrothermal kettle, wherein Bi is used 3+ /Ti 4+ =0.1 calculating the Bi (NO) 3 ) 3 ·5H 2 The dropwise addition of O solution in an amount of Bi 3+ /Nb 5+ 1 calculating the Nb 2 O 5 In the amount of Ag + /Ti 4+ Calculating the dropping amount of the nano silver by using = 0.03;
step three, transferring the hydrothermal kettle into an oven, and reacting for 3 hours at 200 ℃;
and step four, filtering and washing the obtained material after the hydrothermal reaction is finished, drying the obtained solid, and then placing the solid in a high-temperature furnace to calcine for 2 hours at the temperature of 600 ℃.
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| ITMI20030291A1 (en) * | 2003-02-18 | 2004-08-19 | Italcementi Spa | SOLID FOR CEMENTITIOUS PHOTOCATALYTIC FLOORING |
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