Far infrared negative oxygen ion material water-based nano dispersion liquid

Abstract

The invention relates to the field of coatings, and provides a far infrared negative oxygen ion material water-based nano dispersion liquid which comprises the following components in parts by weight: 300-350 parts of water; 35-45 parts of a wetting agent; 40-60 parts of a dispersant; 25 to 35 parts of a defoaming agent; 35-45 parts of a multifunctional auxiliary agent; 5-7 parts of a thickening agent; 400 to 600 parts of an activated far infrared negative oxygen ion material; 1-3 parts of an accelerant; and 3-5 parts of a shielding agent. According to the scheme, the activated far-infrared negative oxygen ion material with multiple components cooperatively promoted is designed, the hemispherical spectral emissivity in the wave band of 4-14 microns can be improved, the emissivity even reaches 0.95 or above in the key wave band of 8-12 microns, formaldehyde decomposition is effectively promoted, the lasting effect is long, and meanwhile the antibacterial effect is improved.

Description

Technical Field

[0001] The present invention relates to the field of coatings, and in particular to an aqueous nano-dispersion liquid of a far-infrared negative oxygen ion material. Background Art

[0002] Indoor formaldehyde pollution and microbial growth on wall surfaces can lead to a deteriorating living environment, driving the need for formaldehyde removal and antibacterial coatings. Existing technologies often control formaldehyde and bacteria by adding adsorbents and antibacterial agents, but these methods, particularly adsorptive formaldehyde removal, suffer from insufficient durability and low efficiency. Summary of the Invention

[0003] To solve the above problems, the present invention provides an aqueous nano-dispersion of far-infrared negative oxygen ion materials, and designs a multi-component synergistically promoted activated far-infrared negative oxygen ion material, which can improve the hemispherical spectral emissivity in the 4-14μm band, and even reach above 0.95 in the key band of 8-12μm, effectively promoting the decomposition of formaldehyde, with a long-lasting effect, and at the same time improving the antibacterial effect; as a paint additive, it has good environmental adaptability and can significantly improve the formaldehyde removal and antibacterial properties of the paint.

[0004] To achieve the above object, the technical solution of the present invention is: This proposal proposes an aqueous nano-dispersion of far-infrared negative oxygen ion materials, which comprises, by weight: 300-350 parts water; 35-45 parts of wetting agent; 40-60 parts of dispersant; 25-35 parts of defoaming agent; 35-45 parts of multifunctional additives; 5-7 parts of thickener; 400-600 parts of activated far-infrared negative oxygen ion material; 1-3 parts of accelerator; 3-5 parts of shielding agent; The preparation method of the activated far-infrared negative oxygen ion material is: Step (1): Add 10-20 parts of tourmaline powder, 5-10 parts of medical stone powder, and 3-5 parts of tetrabutyl titanate to 50-60 parts of alcohol aqueous solution, add dispersant A, and then grind to D 50 Less than 0.8 μm, to obtain prefabricated slurry; Step (2): The prefabricated slurry is mixed with the dry plant carbon source in a mass ratio of 1:1-2, and then 0.1-0.5% of the mass of the prefabricated slurry is added with boron-containing compound powder, ball-milled and then dried, anaerobic calcined, and dispersed at high speed to obtain activated far-infrared negative oxygen ions. This scheme is improved based on the spontaneous far-infrared release characteristics of tourmaline. In order to achieve the effects of formaldehyde removal and antibacterial, this scheme makes the following improvements to the activated far-infrared negative oxygen ion material: 1. Based on the carbon particles generated by the dry plant carbon source after calcination in step (2), nano-boron-doped titanium dioxide-modified tourmaline powder particles and nano-boron-doped titanium dioxide-modified medical stone particles are attached to the surface; 2. The generated carbon particles are similar to activated carbon and have a porous structure on the surface. After the carbon particles are loaded with tourmaline, the carbon particles adsorb formaldehyde. At the same time, the nano-boron-doped titanium dioxide-modified tourmaline powder particles have a significantly improved efficiency of 4-14% due to the catalytic effect of boron-doped titanium dioxide compared with simple tourmaline powder. The synergistic efficiency of the hemispherical spectral emissivity of 0.1 μm and the release efficiency of negative ions improve the formaldehyde decomposition efficiency; 3. Medical stone itself has a porous structure and a certain bactericidal effect. The microporous structure of medical stone particles modified by nano-boron-doped titanium dioxide adsorbs air molecules, which helps the tourmaline powder particles modified by nano-boron-doped titanium dioxide to release negative ions and boron-doped titanium dioxide catalyzes the production of active oxygen, thereby further improving the bactericidal effect.

[0005] Preferably, the wetting agent is a nonionic surfactant; the dispersant is a polycarboxylate or a polyphosphate; the defoaming agent is a silicone defoaming agent; the multifunctional additives are a pH regulator, a preservative, and a film-forming aid in a mass ratio of 3-5:1:1-2; the thickener is a cellulose thickener; the accelerator is a transition metal salt; and the shielding agent is barium sulfate.

[0006] Nonionic surfactants, such as alkylphenol polyoxyethylene ethers and silicone wetting agents, are used to enhance the coating's wettability on walls or substrates. Polycarboxylates, such as sodium polyacrylate, and polyphosphates, such as sodium hexametaphosphate, are used to prevent particle agglomeration, stabilize the dispersion system, and improve material uniformity. Silicone defoamers, such as polydimethylsiloxane, eliminate bubbles and reduce coating defects. AMP-95 is used as a pH adjuster, isothiazolinone as a preservative, and alcohol ester, ether, or alcohol ether ester film-forming aids (propylene glycol phenyl ether) as film-forming aids. Hydroxyethyl cellulose is used as a cellulose thickener to adjust viscosity. Transition metal salts, such as silver nitrate and zinc sulfate, promote negative ion release. Shielding agents primarily absorb radiation.

[0007] Preferably, in step (1), the particle size of the tourmaline powder is 2000 mesh; the particle size of the medical stone powder is 2000 mesh.

[0008] Preferably, in step (1), dispersant A is a polyurethane dispersant (BYK-2155); and the alcohol mass percentage in the alcohol aqueous solution is 5-10%.

[0009] As a preference, in step (1), grinding to D 50 The process for particles smaller than 0.8 μm is as follows: grinding in a sand mill at a rotation speed of 2000 r / min for 4 hours, and the particle size of the zirconium beads in the sand mill is 0.1 mm.

[0010] Preferably, in step (2), the dry plant carbon source is bran particles, straw particles, or grass and tree branch and leaf particles; and the particle size of the dry plant carbon source is 100-200 mesh.

[0011] Preferably, in step (2), the drying conditions for the ball milling and subsequent drying are: nitrogen atmosphere, 60-80°C.

[0012] The main purpose of ball milling is to make the components uniform, break up the agglomeration of the same type, and make different components fully contact; the drying condition is to prevent the oxidation of carbon particles.

[0013] Preferably, in step (2), the process conditions for the anaerobic calcination are: nitrogen atmosphere, heating to 700-850°C at 2-5°C / min, keeping the temperature for 2-4h, cooling to room temperature and then taking out to air environment.

[0014] Preferably, the boron-containing compound powder is boric acid powder or borate powder.

[0015] Compared with existing technologies, this solution has the following advantages: 1. A multi-component synergistically promoted activated far-infrared negative oxygen ion material was designed, which can improve the hemispherical spectral emissivity in the 4-14μm band, and even reach above 0.95 in the key band of 8-12μm, effectively promoting the decomposition of formaldehyde, with a long-lasting effect, while also improving the antibacterial effect.

[0016] 2. The aqueous nano-dispersion of far-infrared negative oxygen ion materials prepared in this scheme can be used as a paint additive, has good environmental adaptability, and can significantly improve the formaldehyde removal and antibacterial properties of the paint; at the same time, the process preparation method of the aqueous nano-dispersion of far-infrared negative oxygen ion materials is simple, and it also utilizes plant carbon sources, which is green and environmentally friendly. DETAILED DESCRIPTION

[0017] The following describes the implementation of the present invention using specific embodiments. Those skilled in the art will readily understand the other advantages and benefits of the present invention from the disclosure herein. Obviously, the embodiments described are only a portion of the present invention, not all of it. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are intended to fall within the scope of protection of the present invention.

[0018] Example 1 A far-infrared negative oxygen ion material aqueous nano-dispersion liquid, comprising, by weight: Water 330; Wetting agent alkylphenol polyoxyethylene ether 40 parts; 50 parts of dispersant sodium hexametaphosphate; 30 parts of defoaming agent polydimethylsiloxane; Multifunctional additives: 18 parts pH regulator AMP-95, 12 parts preservative isothiazolinone, and 6 parts film-forming aid propylene glycol phenyl ether; 6 parts of cellulose thickener; 500 copies of activated far-infrared negative oxygen ion material; 2 parts of accelerator zinc sulfate; Shielding agent barium sulfate 4 parts; The preparation method of the activated far-infrared negative oxygen ion material is: Step (1): Add 15 parts of 2000 mesh tourmaline powder, 8 parts of 2000 mesh medical stone powder, and 4 parts of tetrabutyl titanate to 60 parts of alcohol aqueous solution, add polyurethane dispersant BYK-2155, and then grind in a sand mill with a speed of 2000 r / min and a zirconium bead particle size of 0.1 mm for 4 hours until D 50 The particle size is less than 0.8 μm and is 0.73 μm, and a prefabricated slurry is obtained; in the alcohol aqueous solution, the alcohol mass percentage is 8%; Step (2): The prefabricated slurry and 120-mesh bran particles are mixed in a mass ratio of 1:1, and then 0.4% of the mass of the prefabricated slurry is added with boric acid powder. After ball milling, the mixture is dried at 70°C in a nitrogen atmosphere. Under a nitrogen atmosphere, the temperature is increased at 3°C / min to 800°C, and the mixture is kept warm for 3 hours. After cooling to room temperature, the mixture is taken out to an air environment and dispersed at high speed to obtain an activated far-infrared negative oxygen ion material.

[0019] Example 2 A far-infrared negative oxygen ion material aqueous nano-dispersion liquid, comprising, by weight: Water 350; Wetting agent alkylphenol polyoxyethylene ether 45 parts; 60 parts of dispersant sodium hexametaphosphate; 35 parts of defoaming agent polydimethylsiloxane; Multifunctional additives: 20 parts pH regulator AMP-95, 15 parts preservative isothiazolinone, and 8 parts film-forming aid propylene glycol phenyl ether; 7 parts of cellulose thickener; 600 parts of activated far-infrared negative oxygen ion material; 3 parts of accelerator zinc sulfate; 5 parts of barium sulfate as shielding agent; The preparation method of the activated far-infrared negative oxygen ion material is: Step (1): Add 20 parts of 2000 mesh tourmaline powder, 10 parts of 2000 mesh medical stone powder, and 5 parts of tetrabutyl titanate to 60 parts of alcohol aqueous solution, add polyurethane dispersant BYK-2155, and then grind in a sand mill with a speed of 2000 r / min and a zirconium bead particle size of 0.1 mm for 4 hours until D 50 The particle size is less than 0.8 μm and is 0.72 μm, and a prefabricated slurry is obtained; in the alcohol aqueous solution, the alcohol mass percentage is 8%; Step (2): The prefabricated slurry is mixed with 120-mesh bran particles in a mass ratio of 1:2, and then 0.5% of the mass of the prefabricated slurry is added with boric acid powder. After ball milling, the mixture is dried at 80°C in a nitrogen atmosphere. The mixture is heated to 800°C at 3°C / min in a nitrogen atmosphere, kept warm for 3 hours, cooled to room temperature, taken out to an air environment, and dispersed at high speed to obtain an activated far-infrared negative oxygen ion material.

[0020] Example 3 A far-infrared negative oxygen ion material aqueous nano-dispersion liquid, comprising, by weight: Water 330; Wetting agent alkylphenol polyoxyethylene ether 40 parts; 50 parts of dispersant sodium hexametaphosphate; 30 parts of defoaming agent polydimethylsiloxane; Multifunctional additives: 18 parts pH regulator AMP-95, 12 parts preservative isothiazolinone, and 6 parts film-forming aid propylene glycol phenyl ether; 6 parts of cellulose thickener; 500 copies of activated far-infrared negative oxygen ion material; 2 parts of accelerator zinc sulfate; Shielding agent barium sulfate 4 parts; The preparation method of the activated far-infrared negative oxygen ion material is: Step (1): Add 15 parts of 2000 mesh tourmaline powder, 8 parts of 2000 mesh medical stone powder, and 4 parts of tetrabutyl titanate to 60 parts of alcohol aqueous solution, add polyurethane dispersant BYK-2155, and then grind in a sand mill with a speed of 2000 r / min and a zirconium bead particle size of 0.1 mm for 4 hours until D 50 The particle size is less than 0.8 μm and is 0.73 μm, and a prefabricated slurry is obtained; in the alcohol aqueous solution, the alcohol mass percentage is 8%; Step (2): The prefabricated slurry and 120-mesh bran particles are mixed in a mass ratio of 1:1, and then 0.4% of the mass of the prefabricated slurry is added with boric acid powder. After ball milling, the mixture is dried at 70°C in a nitrogen atmosphere. Under a nitrogen atmosphere, the temperature is increased at 5°C / min to 750°C, and the mixture is kept warm for 3 hours. After cooling to room temperature, the mixture is taken out to an air environment and dispersed at high speed to obtain an activated far-infrared negative oxygen ion material.

[0021] Example 4 A far-infrared negative oxygen ion material aqueous nano-dispersion liquid, comprising, by weight: Water 300; Wetting agent alkylphenol polyoxyethylene ether 35 parts; 40 parts of dispersant sodium hexametaphosphate; 25 parts of defoaming agent polydimethylsiloxane; Multifunctional additives: 15 parts pH regulator AMP-95, 10 parts preservative isothiazolinone, and 6 parts film-forming aid propylene glycol phenyl ether; 5 parts of cellulose thickener; 400 parts of activated far-infrared negative oxygen ion materials; 1 part of accelerator zinc sulfate; Shielding agent barium sulfate 3 parts; The preparation method of the activated far-infrared negative oxygen ion material is: Step (1): Add 10 parts of 2000 mesh tourmaline powder, 6 parts of 2000 mesh medical stone powder, and 3 parts of tetrabutyl titanate to 55 parts of alcohol aqueous solution, add polyurethane dispersant BYK-2155, and then grind in a sand mill with a speed of 2000 r / min and a zirconium bead particle size of 0.1 mm for 4 hours until D 50 The particle size is less than 0.8 μm and is 0.73 μm, and a prefabricated slurry is obtained; in the alcohol aqueous solution, the alcohol mass percentage is 8%; Step (2): The prefabricated slurry is mixed with 120-mesh bran particles in a mass ratio of 1:1, and then 0.2% of the mass of the prefabricated slurry is added with boric acid powder. After ball milling, the mixture is dried at 60°C in a nitrogen atmosphere. The mixture is heated to 750°C at 2°C / min in a nitrogen atmosphere, kept warm for 3 hours, cooled to room temperature, taken out to an air environment, and dispersed at high speed to obtain an activated far-infrared negative oxygen ion material.

[0022] Comparative Example 1 The difference from Example 1 is that tourmaline powder and medical stone powder are directly added: A far-infrared negative oxygen ion material aqueous nano-dispersion liquid, comprising, by weight: Water 330; Wetting agent alkylphenol polyoxyethylene ether 40 parts; 50 parts of dispersant sodium hexametaphosphate; 30 parts of defoaming agent polydimethylsiloxane; Multifunctional additives: 18 parts pH regulator AMP-95, 12 parts preservative isothiazolinone, and 6 parts film-forming aid propylene glycol phenyl ether; 6 parts of cellulose thickener; 330 parts of 2000 mesh tourmaline powder and 170 parts of 2000 mesh medical stone powder; 2 parts of accelerator zinc sulfate; Shielding agent: 4 parts of barium sulfate.

[0023] Comparative Example 2 The difference from Example 1 is that medical stone powder is not added: A far-infrared negative oxygen ion material aqueous nano-dispersion liquid, comprising, by weight: Water 330; Wetting agent alkylphenol polyoxyethylene ether 40 parts; 50 parts of dispersant sodium hexametaphosphate; 30 parts of defoaming agent polydimethylsiloxane; Multifunctional additives: 18 parts pH regulator AMP-95, 12 parts preservative isothiazolinone, and 6 parts film-forming aid propylene glycol phenyl ether; 6 parts of cellulose thickener; 500 copies of activated far-infrared negative oxygen ion material; 2 parts of accelerator zinc sulfate; Shielding agent barium sulfate 4 parts; The preparation method of the activated far-infrared negative oxygen ion material is: Step (1): Add 15 parts of 2000 mesh tourmaline powder and 4 parts of tetrabutyl titanate to 60 parts of alcohol aqueous solution, add polyurethane dispersant BYK-2155, and then grind in a sand mill with a speed of 2000 r / min and a zirconium bead particle size of 0.1 mm for 4 hours until D 50 The particle size is less than 0.8 μm and is 0.74 μm, and a prefabricated slurry is obtained; in the alcohol aqueous solution, the alcohol mass percentage is 8%; Step (2): The prefabricated slurry and 120-mesh bran particles are mixed in a mass ratio of 1:1, and then 0.4% of the mass of the prefabricated slurry is added with boric acid powder. After ball milling, the mixture is dried at 70°C in a nitrogen atmosphere. Under a nitrogen atmosphere, the temperature is increased at 3°C / min to 800°C, and the mixture is kept warm for 3 hours. After cooling to room temperature, the mixture is taken out to an air environment and dispersed at high speed to obtain an activated far-infrared negative oxygen ion material.

[0024] Comparative Example 3 The difference from Example 1 is that no plant carbon source is added: A far-infrared negative oxygen ion material aqueous nano-dispersion liquid, comprising, by weight: Water 330; Wetting agent alkylphenol polyoxyethylene ether 40 parts; 50 parts of dispersant sodium hexametaphosphate; 30 parts of defoaming agent polydimethylsiloxane; Multifunctional additives: 18 parts pH regulator AMP-95, 12 parts preservative isothiazolinone, and 6 parts film-forming aid propylene glycol phenyl ether; 6 parts of cellulose thickener; 500 copies of activated far-infrared negative oxygen ion material; 2 parts of accelerator zinc sulfate; Shielding agent barium sulfate 4 parts; The preparation method of the activated far-infrared negative oxygen ion material is: Step (1): Add 15 parts of 2000 mesh tourmaline powder, 8 parts of 2000 mesh medical stone powder, and 4 parts of tetrabutyl titanate to 60 parts of alcohol aqueous solution, add polyurethane dispersant BYK-2155, and then grind in a sand mill with a speed of 2000 r / min and a zirconium bead particle size of 0.1 mm for 4 hours until D 50 The particle size is less than 0.8 μm and is 0.73 μm, and a prefabricated slurry is obtained; in the alcohol aqueous solution, the alcohol mass percentage is 8%; Step (2): Add 0.4% of the mass of the prefabricated slurry to the prefabricated slurry with boric acid powder, ball-mill evenly, and dry at 70°C in a nitrogen atmosphere. In a nitrogen atmosphere, heat to 800°C at 3°C / min, keep warm for 3 hours, cool to room temperature, take out to an air environment, and disperse at high speed to obtain an activated far-infrared negative oxygen ion material.

[0025] Comparative Example 4 The difference from Example 1 is that no boron-containing compound powder is added: A far-infrared negative oxygen ion material aqueous nano-dispersion liquid, comprising, by weight: Water 330; Wetting agent alkylphenol polyoxyethylene ether 40 parts; 50 parts of dispersant sodium hexametaphosphate; 30 parts of defoaming agent polydimethylsiloxane; Multifunctional additives: 18 parts pH regulator AMP-95, 12 parts preservative isothiazolinone, and 6 parts film-forming aid propylene glycol phenyl ether; 6 parts of cellulose thickener; 500 copies of activated far-infrared negative oxygen ion material; 2 parts of accelerator zinc sulfate; Shielding agent barium sulfate 4 parts; The preparation method of the activated far-infrared negative oxygen ion material is: Step (1): adding 15 parts of 2000-mesh tourmaline powder, 8 parts of 2000-mesh medical stone powder, and 4 parts of tetrabutyl titanate to 60 parts of an alcohol aqueous solution, adding a polyurethane dispersant BYK-2155, and then grinding for 4 hours in a sand mill with a rotation speed of 2000 r / min and a zirconium bead particle size of 0.1 mm, until D50 is less than 0.8 μm and is 0.72 μm, to obtain a prefabricated slurry; in the alcohol aqueous solution, the alcohol mass percentage is 8%; Step (2): The prefabricated slurry is mixed with 120-mesh bran particles in a mass ratio of 1:1, ball-milled until uniform, and then dried at 70°C in a nitrogen atmosphere. In a nitrogen atmosphere, the temperature is increased to 800°C at 3°C / min, kept warm for 3 hours, cooled to room temperature, taken out to an air environment, and dispersed at high speed to obtain an activated far-infrared negative oxygen ion material.

[0026] Comparative Example 5 The difference from Example 1 is that the temperature rises too slowly and the holding time is too long: A far-infrared negative oxygen ion material aqueous nano-dispersion liquid, comprising, by weight: Water 330; Wetting agent alkylphenol polyoxyethylene ether 40 parts; 50 parts of dispersant sodium hexametaphosphate; 30 parts of defoaming agent polydimethylsiloxane; Multifunctional additives: 18 parts pH regulator AMP-95, 12 parts preservative isothiazolinone, and 6 parts film-forming aid propylene glycol phenyl ether; 6 parts of cellulose thickener; 500 copies of activated far-infrared negative oxygen ion material; 2 parts of accelerator zinc sulfate; Shielding agent barium sulfate 4 parts; The preparation method of the activated far-infrared negative oxygen ion material is: Step (1): Add 15 parts of 2000 mesh tourmaline powder, 8 parts of 2000 mesh medical stone powder, and 4 parts of tetrabutyl titanate to 60 parts of alcohol aqueous solution, add polyurethane dispersant BYK-2155, and then grind in a sand mill with a speed of 2000 r / min and a zirconium bead particle size of 0.1 mm for 4 hours until D 50 The particle size is less than 0.8 μm and is 0.73 μm, and a prefabricated slurry is obtained; in the alcohol aqueous solution, the alcohol mass percentage is 8%; Step (2): The prefabricated slurry and 120-mesh bran particles are mixed in a mass ratio of 1:1, and then 0.4% of the mass of the prefabricated slurry is added with boric acid powder. After ball milling, the mixture is dried at 70°C in a nitrogen atmosphere. In a nitrogen atmosphere, the temperature is increased at 1°C / min to 800°C, and the mixture is kept warm for 5 hours. After cooling to room temperature, the mixture is taken out to an air environment and dispersed at high speed to obtain an activated far-infrared negative oxygen ion material.

[0027] Comparative Example 6 The difference from Example 1 is that the temperature rises too quickly and the holding time is too short: A far-infrared negative oxygen ion material aqueous nano-dispersion liquid, comprising, by weight: Water 330; Wetting agent alkylphenol polyoxyethylene ether 40 parts; 50 parts of dispersant sodium hexametaphosphate; 30 parts of defoaming agent polydimethylsiloxane; Multifunctional additives: 18 parts pH regulator AMP-95, 12 parts preservative isothiazolinone, and 6 parts film-forming aid propylene glycol phenyl ether; 6 parts of cellulose thickener; 500 copies of activated far-infrared negative oxygen ion material; 2 parts of accelerator zinc sulfate; Shielding agent barium sulfate 4 parts; The preparation method of the activated far-infrared negative oxygen ion material is: Step (1): Add 15 parts of 2000 mesh tourmaline powder, 8 parts of 2000 mesh medical stone powder, and 4 parts of tetrabutyl titanate to 60 parts of alcohol aqueous solution, add polyurethane dispersant BYK-2155, and then grind in a sand mill with a speed of 2000 r / min and a zirconium bead particle size of 0.1 mm for 4 hours until D 50The particle size is less than 0.8 μm and is 0.72 μm, and a prefabricated slurry is obtained; in the alcohol aqueous solution, the alcohol mass percentage is 8%; Step (2): The prefabricated slurry and 120-mesh bran particles are mixed in a mass ratio of 1:1, and then 0.4% of the mass of the prefabricated slurry is added with boric acid powder. After ball milling, the mixture is dried at 70°C in a nitrogen atmosphere. In a nitrogen atmosphere, the temperature is increased to 800°C at 10°C / min, and the mixture is kept warm for 1 hour. After cooling to room temperature, the mixture is taken out into an air environment and dispersed at high speed to obtain an activated far-infrared negative oxygen ion material.

[0028] Comparative Example 7 The difference from Example 1 is that step (1) does not control D 50 Less than 0.8μm, it is 0.85μm.

[0029] A far-infrared negative oxygen ion material aqueous nano-dispersion liquid, comprising, by weight: Water 330; Wetting agent alkylphenol polyoxyethylene ether 40 parts; 50 parts of dispersant sodium hexametaphosphate; 30 parts of defoaming agent polydimethylsiloxane; Multifunctional additives: 18 parts pH regulator AMP-95, 12 parts preservative isothiazolinone, and 6 parts film-forming aid propylene glycol phenyl ether; 6 parts of cellulose thickener; 500 copies of activated far-infrared negative oxygen ion material; 2 parts of accelerator zinc sulfate; Shielding agent barium sulfate 4 parts; The preparation method of the activated far-infrared negative oxygen ion material is: Step (1): by weight, add 15 parts of 2000 mesh tourmaline powder, 8 parts of 2000 mesh medical stone powder, and 4 parts of tetrabutyl titanate to 60 parts of alcohol aqueous solution, add polyurethane dispersant BYK-2155, and stir evenly to obtain a prefabricated slurry; the alcohol mass percentage in the alcohol aqueous solution is 8%; D 50 0.85μm; Step (2): The prefabricated slurry and 120-mesh bran particles are mixed in a mass ratio of 1:1, and then 0.4% of the mass of the prefabricated slurry is added with boric acid powder. After ball milling, the mixture is dried at 70°C in a nitrogen atmosphere. Under a nitrogen atmosphere, the temperature is increased at 3°C / min to 800°C, and the mixture is kept warm for 3 hours. After cooling to room temperature, the mixture is taken out to an air environment and dispersed at high speed to obtain an activated far-infrared negative oxygen ion material.

[0030] Performance testing: 1. Referring to JJF 1080-2002 -50~+90℃ blackbody radiation source calibration specification, the hemispherical spectral emissivity in the 4-20μm band was measured. The results are shown in Table 1. 2. Refer to JC / T 1074-2021 to measure the 24-hour formaldehyde purification efficiency (required to be >80%) and durability (starting from the second cycle, purification efficiency >70% is considered effective, and the number of cycles is recorded). The results are shown in Table 2; 3. With reference to GB / T 21866-2008, the antibacterial performance (bacterial species: Escherichia coli and Staphylococcus aureus) was determined. The results are shown in Table 2.

[0031] As shown in Table 1: From the above results, it can be seen that due to the activation process (optimization of the distribution ratio of each group of activated far-infrared negative oxygen ion materials + optimization of the preparation process), the emissivity of Examples 1 to 4 at the key wavelength of 8-14 μm is significantly higher than that of Comparative Examples 1 to 8, and even >0.95 in the 8-12 μm band. At the same time, the emissivity in the remaining bands is also basically higher than that of Comparative Examples 1 to 8, and the formaldehyde removal efficiency is higher, the duration is longer, and the antibacterial effect is better.

[0032] Compared with Example 1, Comparative Example 1 did not prepare activated far-infrared negative oxygen ion material, so the performance index was low.

[0033] The difference between Comparative Example 2 and Example 1 is that no medical stone powder is added, and it is obvious that the antibacterial effect is significantly reduced, and the emissivity at the key wavelength of 8-14 μm is also lower than that of Example 1. This is because the addition of medical stone in Example 1 has a synergistic effect with tourmaline, which can promote the improvement of emissivity.

[0034] The difference between Comparative Example 3 and Example 1 is that the carbon particles generated by the lack of carbon source are reduced in the ability to capture formaldehyde, and the synergistic efficiency is weakened, resulting in low emissivity and low performance.

[0035] The difference between Comparative Example 4 and Example 1 is that no boron-containing compound powder is added, that is, no nano-boron-doped titanium dioxide structure is formed, and only nano-titanium dioxide is present, which results in low activity of activating far-infrared negative oxygen ion materials. This is mainly because the complex electronic structure of the nano-boron-doped titanium dioxide structure can excite more negative ions.

[0036] The difference between Comparative Example 5 and Example 1 is that the temperature rises too slowly and the holding time is too long, that is, the grains are too large and the porous structure on the surface of the carbon particles collapses, resulting in reduced performance; the difference between Comparative Example 6 and Example 1 is that the temperature rises too quickly and the holding time is too short, and there may be incomplete reaction, resulting in reduced performance.

[0037] The difference between Comparative Example 7 and Example 1 is that step (1) does not control D 50 Less than 0.8 μm, 0.85 μm, which will make the dispersibility of tourmaline and medical stone worse, and at the same time, the grains will be slightly larger after calcination.

[0038] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A far-infrared negative oxygen ion material aqueous nano-dispersion liquid, characterized in that: In parts by weight, comprising: 300-350 parts water; 35-45 parts of wetting agent; 40-60 parts of dispersant; 25-35 parts of defoaming agent; 35-45 parts of multifunctional additives; 5-7 parts of thickener; 400-600 parts of activated far-infrared negative oxygen ion material; 1-3 parts of accelerator; 3-5 parts of shielding agent; The preparation method of the activated far-infrared negative oxygen ion material is: Step (1): adding 10-20 parts by weight of tourmaline powder, 5-10 parts of medical stone powder, and 3-5 parts of tetrabutyl titanate to 50-60 parts of an alcohol aqueous solution, adding dispersant A, and then grinding until D50 is less than 0.8 μm to obtain a prefabricated slurry; Step (2): The prefabricated slurry is mixed with a dry plant carbon source in a mass ratio of 1:2-3, and then 0.1-0.5% of the mass of the prefabricated slurry is added with a boron-containing compound powder, ball-milled evenly, dried, calcined in anoxic conditions, and dispersed at high speed to obtain an activated far-infrared negative oxygen ion material.

2. The far-infrared negative oxygen ion material aqueous nano-dispersion liquid according to claim 1, characterized in that: The wetting agent is a nonionic surfactant; the dispersant is a polycarboxylate or a polyphosphate; the defoaming agent is a silicone defoaming agent; the multifunctional additives are a pH regulator, a preservative, and a film-forming aid in a mass ratio of 3-5:1:1-2; the thickener is a cellulose thickener; the accelerator is a transition metal salt; and the shielding agent is barium sulfate.

3. The far-infrared negative oxygen ion material aqueous nano-dispersion liquid according to claim 1, characterized in that: In step (1), the particle size of the tourmaline powder is 2000 mesh; the particle size of the medical stone powder is 2000 mesh.

4. The far-infrared negative oxygen ion material aqueous nano-dispersion liquid according to claim 1, characterized in that: In step (1), dispersant A is a polyurethane dispersant; and the alcohol mass percentage in the alcohol aqueous solution is 5-10%.

5. The far-infrared negative oxygen ion material aqueous nano-dispersion liquid according to claim 1, characterized in that: In step (1), the process of grinding to a D50 of less than 0.8 μm is as follows: grinding for 4 h in a sand mill with a rotation speed of 2000 r / min, and the particle size of the zirconium beads in the sand mill is 0.1 mm.

6. The far-infrared negative oxygen ion material aqueous nano-dispersion liquid according to claim 1, characterized in that: In step (2), the dry plant carbon source is bran particles, straw particles, and grass and tree branch and leaf particles; the particle size of the dry plant carbon source is 100 mesh to 200 mesh.

7. The far-infrared negative oxygen ion material aqueous nano-dispersion liquid according to claim 1, characterized in that: In step (2), the drying conditions for the ball milling and subsequent drying are: nitrogen atmosphere, 60-80°C.

8. The far-infrared negative oxygen ion material aqueous nano-dispersion liquid according to claim 1, characterized in that: In step (2), the process conditions of the anaerobic calcination are: nitrogen atmosphere, heating to 700-850°C at 2-5°C / min, keeping warm for 2-4 hours, cooling to room temperature and then taking out to air environment.

9. The far-infrared negative oxygen ion material aqueous nano-dispersion liquid according to claim 1, characterized in that: The boron-containing compound powder is boric acid powder or borate powder.

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