CN111848102B - Efficient mildew-proof, bactericidal and fireproof interior wall paint and preparation method thereof - Google Patents
Efficient mildew-proof, bactericidal and fireproof interior wall paint and preparation method thereof 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
- C04B28/24—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 alkyl, ammonium or metal silicates; containing silica sols
- C04B28/26—Silicates of the alkali metals
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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
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/02—Granular materials, e.g. microballoons
- C04B14/30—Oxides other than silica
- C04B14/304—Magnesia
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- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
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- 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
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
- C04B40/0046—Premixtures of ingredients characterised by their processing, e.g. sequence of mixing the ingredients when preparing the premixtures
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- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
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- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
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- C04B2111/2092—Resistance against biological degradation
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- 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
- C04B2111/28—Fire resistance, i.e. materials resistant to accidental fires or high temperatures
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Abstract
The invention discloses a high-efficiency mildew-proof bactericidal fireproof interior wall paint and a preparation method thereof, belonging to the field of inorganic coatings. The interior wall paint comprises the following components in parts by weight: 30-40 parts of inorganic powder; 10-15 parts of titanium dioxide; 30-40 parts of potassium silicate; 0.1-0.3 part of silver ion bactericide; 0.4-0.5 part of cellulose; 0.1-1 part of a dispersant; 0.1-1 part of wetting agent; 0.1-0.5 part of defoaming agent; 10-20 parts of water. The preparation method comprises the following steps: adding a defined amount of a dispersing agent, a wetting agent and a defoaming agent into a defined amount of water in sequence; under the condition of stirring, adding specified amounts of titanium dioxide, inorganic powder and cellulose, and increasing the stirring speed; finally, adding specified amount of potassium silicate and silver ion bactericide, and stirring. The inorganic coating does not contain volatile organic compounds, is an environment-friendly coating, has strong antibacterial effect and can meet the A-grade fireproof requirement.
Description
Technical Field
The invention relates to the field of inorganic coatings, in particular to a high-efficiency mildew-proof bactericidal fireproof interior wall paint and a preparation method thereof.
Background
Coatings refer to a class of materials used for the decoration or protection of buildings. The building wall decorating material has the characteristics of light weight, good safety, bright color, good decorative texture, convenient construction, easy maintenance, energy conservation and the like, and becomes an ideal building wall decorating material. At present, the coatings are mainly divided into two categories of organic coatings and inorganic coatings. The organic paint is widely applied along with the development of the petrochemical industry, and has good film forming property, good brushing property, good flexibility and excellent decorative effect. The inorganic coating is a building decoration material using a silicate inorganic high molecular compound as a film forming substance. The film-forming material is mainly an alkali metal silicate or silica sol. Compared with organic coatings, the building coating using inorganic polymers as film-forming substances has excellent weather resistance and is very stable under the action of ultraviolet light; good heat resistance, non-combustible and smokeless when meeting fire; better stain resistance; the dust is not easy to absorb, and the bright and fast decorative effect can be kept; volatile organic matters are not generated in the manufacturing and using processes, the environment is not polluted, and the coating is an environment-friendly coating; the raw material resources are rich, the cost is low, and the application prospect is wide.
With the emergence of new coronavirus pneumonia epidemic situation, consumers are more environmentally friendly and healthier than other consumers at any time. The organic coating is easy to be polluted by moisture, water seepage and the like in the environment due to insufficient functionality, bacteria can erode the wall surface to different degrees, the coating corroded by mould can fade, stain and fall off, and the organic coating has peculiar smell and formaldehyde, has different threats to the health of consumers, and is particularly easy to aggravate diseases such as respiration, leukemia and the like. With the progress of science and technology, new functional coatings are more and more, but usually only focus on one or more aspects of odor purification, mildew prevention, sterilization and fire prevention, and the complete inclusion is difficult to achieve, for example, high-grade emulsion paint can achieve the functions of odor purification, mildew prevention and sterilization, but has poor fire resistance; and inorganic paint has good odor-removing, mildew-proof and fireproof effects, has a certain bacteriostatic function, but has a poor effect of quickly killing bacteria and viruses.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide the efficient mildew-proof and sterilization fireproof interior wall paint which has the advantages of smell purification, mildew prevention, sterilization, fire prevention and the like.
The invention also aims to provide a preparation method of the high-efficiency mildew-proof bactericidal fireproof interior wall paint, so that the interior wall paint with the advantages of smell removal, mildew prevention, sterilization, fire prevention and the like can be obtained through a simple preparation method.
The technical purpose of the invention is realized by the following technical scheme:
the efficient mildew-proof bactericidal fireproof interior wall paint comprises the following components in parts by weight:
30-40 parts of inorganic powder;
10-15 parts of titanium dioxide;
30-40 parts of potassium silicate;
0.1-0.3 part of silver ion bactericide;
0.4-0.5 part of cellulose;
0.1-1 part of a dispersant;
0.1-1 part of wetting agent;
0.1-0.5 part of defoaming agent;
10-20 parts of water.
By adopting the technical scheme, the wall surface coated with the common organic coating can become a hotbed for survival and mass propagation of bacteria, mould and virus at proper temperature and humidity, which causes great harm to the health of people living in a room, can cause respiratory diseases, allergic symptoms and the like by contacting the mould for a long time, and people with low immunity can cause headache, fever, asthma, inflammation of skin or mucous membrane, tonsillitis and serious carcinogenic substances. Especially in hospital environment, pathogenic bacteria mainly come from patients, and the patients and crowds flow in a large amount, and the pathogenic bacteria are combined with dust particles in air of the hospital, attached to a wall body, fly to the ground, breed and propagate in a proper environment, and are easily spread to medical care personnel and patients who see a doctor again. The coating is a pure inorganic coating, does not contain emulsion, completely eradicates providing nutrients for bacteria and viruses, and does not affect the health after long-term use.
Meanwhile, the paint of the invention introduces an inorganic antibacterial agent to play the roles of antibiosis and sterilization. The antibacterial agent may be classified into four types, i.e., an organic antibacterial agent, an inorganic antibacterial agent, a natural antibacterial agent, and an organic-inorganic composite antibacterial agent, depending on the material, and the former two are most commonly used. The organic antibacterial agent has good sterilization effect on dysentery bacillus, colon bacillus and staphylococcus aureus, and different organic antibacterial agents have different sterilization mechanisms. However, organic antibacterial agents have a remarkable short-term bactericidal effect but poor temperature resistance as compared with inorganic antibacterial agents, and generally have dissolution and precipitation phenomena in long-term use at 200 ℃ or below, resulting in short service life. Inorganic antimicrobial agents successfully overcome the above-mentioned disadvantages of organic antimicrobial agents by combining the inherent stability of inorganic materials with the high efficacy and broad spectrum of antimicrobial components.
The antibacterial agent selected by the invention belongs to a silver ion type inorganic antibacterial agent in the inorganic antibacterial agent, silver ions in the coating can be attached to titanium dioxide to form an aqueous dispersion, and the silver ions and cell walls/cell membranes are attracted by virtue of charges and are aggregated to form small particles; silver ions then enter the cell interior, combine with protein (coacervation) and DNA, and erode cell viability; then the silver ion causes the morphological change in the cell and erodes the cell membrane, so that the cell membrane is separated from the cell wall, the cytoplasm in the cell flows out, and the sterilization effect is achieved. The inorganic antibacterial agent is a strong alkali-resistant high-efficiency broad-spectrum bactericide, and can quickly and effectively kill most of bacteria and viruses for a long time under the conditions of high temperature and high humidity.
In addition, the inorganic coating does not contain combustible materials and can meet the A-grade fireproof requirement. A paint film formed on the upper wall of the organic paint is combustible and can be combusted in case of fire, a large amount of toxic and harmful dense smoke is released, the materials are burnt if the smoke is light, and the personal safety is endangered if the smoke is heavy.
The invention is further set that the interior wall paint also comprises the following components in parts by weight:
0.01-0.1 part of hydrotalcite;
3-8 parts of nano silicon carbide;
1-5 parts of nano magnesium oxide;
2-7 parts of magnetic graphene oxide.
By adopting the technical scheme, the silver-carrying bactericide has better antibacterial effect in the silver ion bactericide, but the silver has strong photosensitive effect and poor stability. The hydrotalcite of the invention is a hydroxide with rigid structure on the outside and anion type layered structure filled with anions on the insideThe compound has a special layered structure, can protect the internal structure, and can be filled with various anions in a replaceable manner. Ag of the present invention+Can enter into hydrotalcite to stabilize Ag+The sterilizing effect of the bactericide is improved.
The nano silicon carbide is added, so that the sterilizing effect of the bactericide is further enhanced, and the nano silicon carbide has a better sterilizing effect at a lower concentration. The nano silicon carbide has high surface activity, and the permeability of the cell membrane of the thallus can be effectively destroyed by the powerful lipid peroxide and the damage oxidation resistance, so that the metabolic dysfunction of bacteria is finally died, and the sterilization effect is achieved.
The nano magnesium oxide is further added into the inorganic coating, so that the sterilization effect of the coating is further improved. Fs exists on the surface of the nano MgO sample+Color center, 02 -Can be stably adsorbed on the defect positions generated by the edges and corners of the MgO crystal and is connected with four or three Mg2+Forming a coordination structure; OH generated by nano MgO in aqueous solution-And O2 -Can effectively killS.aureusAndB.subtilis；02 -can destroy the structure of the sec-phthalein amine in the outer wall of the cell, thereby playing a role in killing bacteria. In addition, the magnesium oxide can be used as a refractory material, so that the fire resistance of the coating is enhanced.
Ag of the present invention+A part of which is bonded to TiO2On the other part of Ag+And combining with the magnetic graphene oxide to form the graphene-Ag composite material. In the graphene-Ag composite material, the GO has large specific surface area, and the Ag is+Easily deposit on GO surface, therefore, GO can carry Ag+The Ag is well adsorbed on the surface of bacteria, and the probability of contacting the Ag with the bacteria is improved, so that the antibacterial activity is greatly improved.
The invention is further set that the interior wall paint comprises the following components in parts by weight:
32-38 parts of inorganic powder;
11-14 parts of titanium dioxide;
32-38 parts of potassium silicate;
0.1-0.3 part of silver ion bactericide;
0.02-0.08 part of hydrotalcite;
4-7 parts of nano silicon carbide;
2-4 parts of nano magnesium oxide;
3-6 parts of magnetic graphene oxide;
0.4-0.5 part of cellulose;
0.2-0.8 part of dispersant;
0.2-0.8 part of wetting agent;
0.2-0.4 part of defoaming agent;
12-18 parts of water.
The invention is further configured such that the hydrotalcite has a particle size of 50 to 200 nm.
By adopting the technical scheme, the particle size of the hydrotalcite is limited to 50-200nm, and on the one hand, the hydrotalcite with the particle size of 50-200nm and Ag are used+The bonding effect is best, and on the other hand, hydrotalcite with the grain diameter of 50-200nm and Ag are used+After bonding, the resulting composite material can be better dispersed in the coating.
The invention is further configured that the preparation method of the nano magnesium oxide comprises the following steps: weighing a certain amount of Mg (NO) respectively3)2·6H2O and anhydrous Na2CO3Dissolving in water, preparing Mg respectively2+With CO3 2-The concentration ratio of the solution is 1: 2; heating the two solutions to 60-70 ℃, preparing basic magnesium carbonate by a nucleation/crystallization isolation method, washing, drying, and roasting at 500-600 ℃ for 0.5-1.5h to prepare the nano magnesium oxide.
The invention is further set up in that the particle size of the nano-magnesia is 20-45 nm.
By adopting the technical scheme, the invention limits the particle size of the nano magnesium oxide to be 20-45nm, and can achieve good sterilization effect. The nano magnesium oxide has a decreasing trend of sterilization effect along with the gradual increase of the particle size. And the particle size is too small, and the sterilization effect is not ideal.
The invention is further configured that the preparation method of the magnetic graphene oxide comprises the following steps: dispersing 10-15 parts of graphene oxide in deionized water, and then adding 0.1-0.3 part of FeCl3And 0.2-0.6 parts of FeCl2Uniformly mixing, adjusting the pH value to 9-11, heating to 80-90 ℃, stirring for 2-4 hours, cooling to room temperature, filtering, washing and drying to obtain the magnetic graphene oxide.
By adopting the technical scheme, the graphene oxide and FeCl can be prepared by adopting the preparation method3And FeCl2Fully reacting to prepare the obtained magnetic graphene oxide and Ag+Composite, enlarge Ag+The probability of contact with bacteria, thereby increasing the antimicrobial properties of the coating of the invention.
The invention is further configured that the preparation method of the nano silicon carbide comprises the following steps: heating 300-350 parts of water, 40-60 parts of silicon carbide powder and 1-2 parts of silane coupling agent to 75-85 ℃ at the heating rate of 4-9 ℃/min under the vacuum condition, stirring for reacting for 3-5.5h, then quickly cooling the reaction product to room temperature, carrying out vacuum filtration, washing and drying, and cooling to obtain the nano silicon carbide.
By adopting the technical scheme, the preparation method of the nano silicon carbide is simple and convenient to operate, the success rate of preparation can be improved by adding the silane coupling agent, and the prepared nano silicon carbide has high surface activity and can effectively destroy the permeability of thallus cell membranes, so that the metabolic dysfunction of bacteria is finally killed.
The invention further provides that the dispersant is nopinaceae SN-5040. The inorganic powder, the titanium dioxide, the silver ion bactericide, the hydrotalcite, the nano silicon carbide, the nano magnesium oxide, the magnetic graphene oxide and the cellulose have good dispersion effects in the silicate.
The invention further provides that the wetting agent is Chinese BL 9. The wetting agent of the invention can make solid materials more easily wetted by water. Which wets the solid material by lowering its surface tension or interfacial tension, allowing water to spread on or penetrate the surface of the solid material.
The invention further provides that the defoaming agent is Australian AF-34. The defoaming agent of the present invention can reduce surface tension, inhibit foam generation or eliminate foam generation already in the preparation process of the coating.
The second purpose of the invention is that: the preparation method of the high-efficiency mildew-proof bactericidal fireproof interior wall paint comprises the following steps:
a. adding 0.1-1 part of dispersing agent, 0.1-1 part of wetting agent and 0.1-0.5 part of defoaming agent into 10-20 parts of water in sequence, stirring at 800r/min for 3-8 min;
b. adding 10-15 parts of titanium dioxide, 30-40 parts of inorganic powder and 0.4-0.5 part of cellulose at the stirring speed of 800r/min for 500-;
c. 30 to 40 portions of potassium silicate and 0.1 to 0.3 portion of silver ion bactericide are added and stirred for 3 to 8min at the speed of 1000r/min of 600-.
The invention is further set that 2-7 parts of magnetic graphene oxide, 0.01-0.1 part of hydrotalcite, 3-8 parts of nano silicon carbide and 1-5 parts of nano magnesium oxide are also added in the step b.
By adopting the technical scheme, the inorganic coating with the advantages of odor removal, mildew prevention, sterilization, fire prevention and the like can be simply and quickly produced. The pure inorganic coating prepared by the invention is particularly suitable for the inner walls of public buildings such as hospitals, schools, libraries and the like, can quickly and effectively kill adhered bacteria, reduces the cross infection of personnel and the bacterial adhesion in the environment, and ensures the safety of the personnel.
In conclusion, the invention has the following beneficial effects:
1. the invention is a pure inorganic coating, no volatile organic compound is generated in the preparation process, and the environment is not polluted, thus the invention is a green environment-friendly coating;
2. the inorganic antibacterial agent is added into the coating, so that the coating has a strong antibacterial effect, and is strong in temperature resistance and long in service life;
3. the coating of the invention does not contain combustible materials, can reach the A-grade fireproof requirement, and the nano magnesium oxide is a fireproof material, and the addition of the nano magnesium oxide can increase the fireproof performance of the coating of the invention.
Detailed Description
The inorganic powder is purchased from active micro powder of Korea-resistant trade (Shanghai) Limited company;
the titanium dioxide of the invention has the scientific name of titanium dioxide, CAS: 13463-67-7;
the potassium silicate of the present invention was purchased from konai european trade (shanghai) ltd, model CB 108;
the hydrotalcite of the invention is purchased from Jingjiang city Kanggao Special plastics science and technology Limited, model FM 300;
the silver ion bactericide of the invention is purchased from Claien chemical industry (China) Co., Ltd., model LP 10.
The present invention will be described in further detail with reference to examples.
Example 1
A preparation method of the high-efficiency mildew-proof bactericidal fireproof interior wall paint comprises the following steps:
a. adding 5g of SN-5040 of Norpleaceae, 5g of Huahan BL9 and 3g of AF-34 into 150g of water in sequence, stirring at 700r/min, and stirring for 5 min;
b. adding 120g of titanium dioxide, 350g of inorganic powder and 4.5g of cellulose at the stirring speed of 700r/min, increasing the stirring speed to 1400r/min, and stirring for 30 min;
c. 350g of potassium silicate and 2g of silver ion bactericide are added, and the mixture is stirred for 5min at a speed of 900 r/min.
Example 2
A preparation method of the high-efficiency mildew-proof bactericidal fireproof interior wall paint comprises the following steps:
a. adding 1g of SN-5040 of Norpleaceae, 10g of Huahan BL9 and 1g of AF-34 into 100g of water in sequence, stirring at 800r/min, and stirring for 3 min;
b. adding 150g of titanium dioxide, 300g of inorganic powder, 70g of magnetic graphene oxide, 1g of hydrotalcite, 30g of nano silicon carbide, 50g of nano magnesium oxide and 5g of cellulose at the stirring speed of 800r/min, increasing the stirring speed to 1200r/min, and stirring for 40 min;
c. adding 300g potassium silicate and 1g silver ion bactericide, stirring at 1000r/min for 3 min.
The preparation method of the nano magnesium oxide comprises the following steps: respectively weighing a certain amountMg (NO) of3)2·6H2O and anhydrous Na2CO3Dissolving in water to prepare Mg2+Has a concentration of 0.8 mol. L-1Salt solution and CO3 2-Is 1.6mol.L-1An alkali solution of (4); heating the two solutions to 60 ℃, preparing basic magnesium carbonate by a nucleation/crystallization isolation method, washing, drying, and roasting at 600 ℃ for 0.5h to prepare the nano magnesium oxide. The grain diameter of the prepared nano-magnesia is 20 nm.
The preparation method of the magnetic graphene oxide comprises the following steps: dispersing 100g of graphene oxide in deionized water, and then adding 3g of FeCl3And 2gFeCl2Uniformly mixing, adjusting the pH value to 9, heating to 80 ℃, stirring for 4 hours, cooling to room temperature, filtering, washing and drying to obtain the magnetic graphene oxide.
The preparation method of the nano silicon carbide comprises the following steps: heating 3000g of water, 400g of silicon carbide powder and 20g of silane coupling agent to 75 ℃ at the heating rate of 4 ℃/min under the vacuum condition, stirring and reacting for 5.5 hours, then quickly cooling a reaction product to room temperature, carrying out vacuum filtration, washing and drying, and cooling to obtain the nano silicon carbide.
Example 3
A preparation method of the high-efficiency mildew-proof bactericidal fireproof interior wall paint comprises the following steps:
a. adding 10g of SN-5040 of Norpleaceae, 1g of BL9 of Huahan and 5g of AF-34 into 200g of water in sequence, stirring at 500r/min, and stirring for 8 min;
b. adding 100g of titanium dioxide, 400g of inorganic powder, 20g of magnetic graphene oxide, 0.1g of hydrotalcite, 80g of nano silicon carbide, 10g of nano magnesium oxide and 4g of cellulose at a stirring speed of 500r/min, increasing the stirring speed to 1500r/min, and stirring for 20 min;
c. adding 400g potassium silicate and 3g silver ion bactericide, and stirring at 600r/min for 8 min.
The preparation method of the nano magnesium oxide comprises the following steps: weighing a certain amount of Mg (NO) respectively3)2·6H2O and anhydrous Na2CO3Dissolving in water to prepare Mg2+Has a concentration of 0.7 mol. L-1Salt solution and CO3 2-Is 1.4mol.L-1An alkali solution of (4); heating the two solutions to 70 ℃, preparing basic magnesium carbonate by a nucleation/crystallization isolation method, washing, drying, and roasting at 500 ℃ for 1.5h to prepare the nano magnesium oxide. The grain diameter of the prepared nano-magnesia is 45 nm.
The preparation method of the magnetic graphene oxide comprises the following steps: dispersing 150g of graphene oxide in deionized water, and then adding 1g of FeCl3And 6g FeCl2Uniformly mixing, adjusting the pH value to 11, heating to 90 ℃, stirring for 2 hours, cooling to room temperature, filtering, washing and drying to obtain the magnetic graphene oxide.
The preparation method of the nano silicon carbide comprises the following steps: heating 3500g of water, 600g of silicon carbide powder and 10g of silane coupling agent to 85 ℃ at the heating rate of 9 ℃/min under the vacuum condition, stirring for reaction for 3 hours, then quickly cooling the reaction product to room temperature, carrying out vacuum filtration, washing and drying, and cooling to obtain the nano silicon carbide.
Example 4
A preparation method of the high-efficiency mildew-proof bactericidal fireproof interior wall paint comprises the following steps:
a. 2g of SN-5040 of Norpleaceae, 8g of Huahan BL9 and 2g of AF-34 are put into 120g of water in sequence, stirred at 700r/min and stirred for 4 min;
b. adding 110g of titanium dioxide, 320g of inorganic powder, 60g of magnetic graphene oxide, 0.8g of hydrotalcite, 40g of nano silicon carbide, 40g of nano magnesium oxide and 5g of cellulose at the stirring speed of 700r/min, increasing the stirring speed to 1300r/min, and stirring for 38 min;
c. 320g of potassium silicate and 1g of silver ion bactericide are added, and the mixture is stirred for 6min at the speed of 800 r/min.
The preparation method of the nano magnesium oxide comprises the following steps: weighing a certain amount of Mg (NO) respectively3)2·6H2O and anhydrous Na2CO3Dissolving in water to prepare Mg2+Has a concentration of 0.6 mol. L-1Salt solution and CO3 2-Is 1.2mol.L-1An alkali solution of (4); heating the two solutions to 66 deg.C, preparing basic magnesium carbonate by nucleation/crystallization isolation method, washing, drying, and calcining at 540 deg.C for 0.8h to obtain nanometerAnd (3) magnesium oxide. The grain diameter of the prepared nano-magnesia is 40 nm.
The preparation method of the magnetic graphene oxide comprises the following steps: dispersing 120g of graphene oxide in deionized water, and then adding 1.5g of FeCl3And 5g FeCl2Uniformly mixing, adjusting the pH value to 9, heating to 88 ℃, stirring for 2.6 hours, cooling to room temperature, filtering, washing and drying to obtain the magnetic graphene oxide.
The preparation method of the nano silicon carbide comprises the following steps: heating 3400g of water, 450g of silicon carbide powder and 18g of silane coupling agent to 82 ℃ under a vacuum condition at a heating rate of 8 ℃ min, stirring for reacting for 5 hours, then quickly cooling a reaction product to room temperature, carrying out vacuum filtration, washing, drying and cooling to obtain the nano silicon carbide.
Example 5
A preparation method of the high-efficiency mildew-proof bactericidal fireproof interior wall paint comprises the following steps:
a. adding 8g of SN-5040 of Norpleaceae, 2g of BL9 of Hanhua and 4g of AF-34 into 180g of water in sequence, stirring at 600r/min, and stirring for 6 min;
b. adding 140g of titanium dioxide, 380g of inorganic powder, 30g of magnetic graphene oxide, 0.2g of hydrotalcite, 70g of nano silicon carbide, 20g of nano magnesium oxide and 4g of cellulose at the stirring speed of 600r/min, increasing the stirring speed to 1450r/min, and stirring for 25 min;
c. 380g of potassium silicate and 3g of silver ion bactericide are added, and the mixture is stirred at 900r/min for 4 min.
The preparation method of the nano magnesium oxide comprises the following steps: weighing a certain amount of Mg (NO) respectively3)2·6H2O and anhydrous Na2CO3Dissolving in water to prepare Mg2+Has a concentration of 0.9 mol. L-1Salt solution and CO3 2-Is 1.8mol.L-1An alkali solution of (4); heating the two solutions to 64 ℃, preparing basic magnesium carbonate by a nucleation/crystallization isolation method, washing, drying, and roasting at 560 ℃ for 1.2h to prepare the nano magnesium oxide. The particle size of the prepared nano-magnesia is 30 nm.
The preparation method of the magnetic graphene oxide comprises the following steps: dispersing 140g of graphene oxide in deionized waterWater, then 2.5g FeCl3And 3g FeCl2Uniformly mixing, adjusting the pH value to 11, heating to 83 ℃, stirring for 3.8 hours, cooling to room temperature, filtering, washing and drying to obtain the magnetic graphene oxide.
The preparation method of the nano silicon carbide comprises the following steps: heating 3200g of water, 550g of silicon carbide powder and 12g of silane coupling agent to 78 ℃ at the heating rate of 5 ℃/min under the vacuum condition, stirring for reacting for 3.5 hours, then quickly cooling a reaction product to room temperature, carrying out vacuum filtration, washing, drying and cooling to obtain the nano silicon carbide.
Comparative example 1
The preparation method of the high-efficiency mildew-proof bactericidal fireproof interior wall paint is different from the preparation method of the example 1 in that: no silver ion bactericide was added.
Comparative example 2
The preparation method of the high-efficiency mildew-proof bactericidal fireproof interior wall paint is different from the preparation method of the example 2 in that: and (c) adding no magnetic graphene oxide in the step (b).
Comparative example 3
The preparation method of the high-efficiency mildew-proof bactericidal fireproof interior wall paint is different from the preparation method of the embodiment 3 in that: and (c) adding no nano silicon carbide in the step b.
Comparative example 4
The preparation method of the high-efficiency mildew-proof bactericidal fireproof interior wall paint is different from the preparation method of the embodiment 4 in that: and (c) adding no nano magnesium oxide in the step (b).
Comparative example 5
The preparation method of the high-efficiency mildew-proof bactericidal fireproof interior wall paint is different from the preparation method of the example 5 in that: no hydrotalcite is added in step b.
Comparative example 6
An organic coating prepared according to the technical scheme of patent No. 2015108037047, entitled organic coating.
Comparative example 7
An organic coating prepared according to the technical scheme of patent No. 2016107684504 with the patent name of an organic fluorine coating.
Performance testing
The viscosity tests in the examples of the invention and in the comparative examples were determined using the GB 1723-1979 standard.
The contrast ratio test in the examples of the present invention and the comparative examples was carried out using the GB/T5211.17-1988 standard.
The scrub resistance test in the examples of the present invention and the comparative examples was conducted by ASTM D2486-17 Standard test method for scrub resistance of wall surface coating.
The stability after 30 days of thermal storage in the examples and comparative examples of the present invention was measured by GB/T6753.3-1986 "test method for storage stability of coating".
Antibacterial performance, antibacterial durability and mildew resistance in the examples and comparative examples of the present invention were measured by using HG/T3950-2007 "antibacterial paint".
The fire-proof performance in the embodiment and the comparative example of the invention is measured by GB8624-2012 and GB/T20285-2006.
The VOC in the embodiment and the comparative example of the invention is measured by GB/T29592 and 2013 method for measuring the release amount of Volatile Organic Compounds (VOC) and aldehyde compounds of building adhesives.
The results are shown in Table 1.
As can be seen from Table 1, the interior wall paints prepared in examples 1-5 of the present invention all have antibacterial, and antifungal properties, and the examples 2-5 are added with hydrotalcite, nano-silicon carbide, nano-magnesium oxide, and magnetic graphene oxide to reinforce Ag+Stability or Ag+The antibacterial effect is further enhanced by the contact probability with germs or the way of destroying the cell membranes or cell walls of the thalli and the like. In addition, the interior wall paints prepared in examples 1-5 of the present invention have excellent fire resistance, fire rating of class A, little combustion, and smoke toxicity of class A (AQ 1). The interior wall paint prepared in the embodiments 1-5 of the invention belongs to inorganic paint, wherein the antibacterial agent is selected from a sterile antibacterial agent, has no VOC and no macromolecular organic matter detection, and belongs to inorganic paintIs a green environment-friendly coating.
Comparative example 1 differs from example 1 in that it does not contain Ag+. As can be seen from Table 1, the antibacterial property of comparative example 1 was 30.3%, the antibacterial durability was 25.8%, and the antifungal property was class 2, i.e., the colonies of mold were intermittently spread or loosely distributed on the surface of the substrate, and the total area occupied by the mold growth was 30% or less. This indicates that Ag is present+The invention has good bacteriostatic effect, and Ag has+Attract with cell wall/cell membrane by means of electric charge, then silver ions enter the interior of the cell, combine with protein (coagulation) and DNA and destroy the cell membrane, thereby achieving the effect of sterilization.
Comparative example 2 differs from example 2 in that no magnetic graphene oxide was added. As can be seen from table 1, the antibacterial performance of comparative example 2 was 99.6%, and the antibacterial durability performance was 98.7%, which were slightly lower than those of example 2 in terms of antibacterial performance and antibacterial durability performance. This indicates that magnetic graphene oxide can carry Ag+The Ag is well adsorbed on the surface of bacteria, and the probability of contact of Ag and the bacteria is improved, so that the antibacterial activity of the interior wall paint is greatly improved.
Comparative example 3 differs from example 3 in that no nano-silicon carbide was added. As can be seen from table 1, the antibacterial performance of comparative example 3 was 99.3%, and the antibacterial durability was 96.4%, which were slightly lower than those of example 3 in terms of antibacterial performance and antibacterial durability. The high surface activity of the nano silicon carbide can effectively destroy the permeability of the cell membrane of the thallus, so that the metabolic dysfunction of bacteria is finally died, and the sterilization effect of the interior wall paint is further improved.
Comparative example 4 differs from example 4 in that no nano-magnesia was added. As can be seen from table 1, the antibacterial performance of comparative example 4 was 99.4%, and the antibacterial durability performance was 96.9%, which was slightly lower than that of example 4 in terms of antibacterial performance and antibacterial durability performance. This indicates that nano-MgO generates OH in aqueous solution-And O2 -Can destroy cell structure, thereby playing the role of killing bacteria.
Comparative example 5 differs from example 5 in that no hydrotalcite was added. As can be seen from Table 1, comparative example 5 has 99.7% antibacterial property, antibacterial resistanceThe long-term performance was 99.0%, which was slightly lower than that of example 5 in terms of antibacterial performance and antibacterial durability. This indicates that Ag is present+Can enter into hydrotalcite to stabilize Ag+Thereby improving the sterilization effect of the interior wall paint.
Comparative example 6 is a conventional organic coating. As can be seen from table 1, first, comparative example 6 is significantly lower than any of the examples of the present invention in both antibacterial performance and antibacterial durability, and also in mildewproof performance, particularly, in the mildewproof performance, is class 3, i.e., a large amount of mold grows and proliferates, occupying 70% or less of the total area, and has almost no bacteriostatic and bactericidal effects. Secondly, the coating composition of comparative example 6 has a large amount of organic matter, which is classified as B1 in fire-proof property, i.e., a flame-retardant building material, and smoke toxicity is classified as a safety class (AQ 2), but is lower than any of the examples of the present invention. Finally, the presence of volatile organic compounds in the coating composition of comparative example 6 can have an impact on the health of the user.
Comparative example 7 is a prior art organofluorine containing coating. As can be seen from table 1, first, comparative example 7 is significantly lower than any of the examples of the present invention in both antibacterial performance and antibacterial durability, and also in mildewproof performance, particularly, in the mildewproof performance, is class 3, i.e., a large amount of mold grows and proliferates, occupies 70% or less of the total area, and has almost no bacteriostatic and bactericidal effects. Secondly, the coating composition of comparative example 7 has a large amount of organic matter, which is classified as B1 in fire-proof property, i.e., a flame-retardant building material, and has a smoke-generating toxicity classified as a quasi-safety class (ZA 1), but is lower than that of any of the examples of the present invention. Finally, the presence of volatile organic compounds in the coating composition of comparative example 7 can have an impact on the health of the user.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (8)
1. The utility model provides a high-efficient mould proof sterilization fire prevention interior wall paint which characterized in that: the paint comprises the following components in parts by weight:
30-40 parts of inorganic powder;
10-15 parts of titanium dioxide;
30-40 parts of potassium silicate;
0.1-0.3 part of silver ion bactericide;
0.4-0.5 part of cellulose;
0.1-1 part of a dispersant;
0.1-1 part of wetting agent;
0.1-0.5 part of defoaming agent;
10-20 parts of water;
0.01-0.1 part of hydrotalcite;
3-8 parts of nano silicon carbide;
1-5 parts of nano magnesium oxide;
2-7 parts of magnetic graphene oxide;
the inorganic powder is obtained from active micropowder of Korea-resistant trade (Shanghai) Co.
2. The efficient mildew-proof and bactericidal fireproof interior wall paint as claimed in claim 1, wherein: the interior wall paint comprises the following components in parts by weight:
32-38 parts of inorganic powder;
11-14 parts of titanium dioxide;
32-38 parts of potassium silicate;
0.1-0.3 part of silver ion bactericide;
0.02-0.08 part of hydrotalcite;
4-7 parts of nano silicon carbide;
2-4 parts of nano magnesium oxide;
3-6 parts of magnetic graphene oxide;
0.4-0.5 part of cellulose;
0.2-0.8 part of dispersant;
0.2-0.8 part of wetting agent;
0.2-0.4 part of defoaming agent;
12-18 parts of water.
3. The high-efficiency mildew-proof sterilizing fireproof interior wall paint as claimed in claim 1 or 2, wherein: the particle size of the hydrotalcite is 50-200 nm.
4. The high-efficiency mildew-proof sterilizing fireproof interior wall paint as claimed in claim 1 or 2, wherein: the preparation method of the nano magnesium oxide comprises the following steps: weighing a certain amount of Mg (NO) respectively3)2·6H2O and anhydrous Na2CO3Dissolving in water, preparing Mg respectively2 +With CO3 2-The concentration ratio of the solution is 1: 2; heating the two solutions to 60-70 ℃, preparing basic magnesium carbonate by a nucleation/crystallization isolation method, washing, drying, and roasting at 500-600 ℃ for 0.5-1.5h to prepare the nano magnesium oxide.
5. The efficient mildew-proof and bactericidal fireproof interior wall paint as claimed in claim 4, wherein: the particle size of the nano magnesium oxide is 20-45 nm.
6. The high-efficiency mildew-proof sterilizing fireproof interior wall paint as claimed in claim 1 or 2, wherein: the preparation method of the magnetic graphene oxide comprises the following steps: dispersing 10-15 parts of graphene oxide in deionized water, and then adding 0.1-0.3 part of FeCl3And 0.2-0.6 parts of FeCl2Uniformly mixing, adjusting the pH value to 9-11, heating to 80-90 ℃, stirring for 2-4 hours, cooling to room temperature, filtering, washing and drying to obtain the magnetic graphene oxide.
7. The high-efficiency mildew-proof sterilizing fireproof interior wall paint as claimed in claim 1 or 2, wherein: the preparation method of the nano silicon carbide comprises the following steps: heating 300-350 parts of water, 40-60 parts of silicon carbide powder and 1-2 parts of silane coupling agent to 75-85 ℃ at the heating rate of 4-9 ℃/min under the vacuum condition, stirring for reacting for 3-5.5h, then quickly cooling the reaction product to room temperature, carrying out vacuum filtration, washing and drying, and cooling to obtain the nano silicon carbide.
8. The preparation method of the high-efficiency mildew-proof bactericidal fireproof interior wall paint as claimed in claim 1, which is characterized in that: the method comprises the following steps:
a. adding 0.1-1 part of dispersing agent, 0.1-1 part of wetting agent and 0.1-0.5 part of defoaming agent into 10-20 parts of water in sequence, stirring at 800r/min for 3-8 min;
b. adding 10-15 parts of titanium dioxide, 30-40 parts of inorganic powder, 0.4-0.5 part of cellulose, 2-7 parts of magnetic graphene oxide, 0.01-0.1 part of hydrotalcite, 3-8 parts of nano silicon carbide and 1-5 parts of nano magnesium oxide at the stirring speed of 800r/min for 500-one, increasing the stirring speed to 1500r/min, and stirring for 20-40 min;
c. 30 to 40 portions of potassium silicate and 0.1 to 0.3 portion of silver ion bactericide are added and stirred for 3 to 8min at the speed of 1000r/min of 600-.
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Denomination of invention: The invention relates to a high-efficiency mold proof, bactericidal and fireproof interior wall paint and a preparation method thereof Effective date of registration: 20220727 Granted publication date: 20211228 Pledgee: Xiamen International Bank Co.,Ltd. Beijing Branch Pledgor: BEIJING RAINES NEW MATERIALS TECHNOLOGY Co.,Ltd. Registration number: Y2022990000478 |
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