Anti-oxidation coating capable of improving ion activity and application of anti-oxidation coating

Abstract

The invention discloses an anti-oxidation coating capable of improving ion activity and application thereof, and belongs to the technical field of paints.The anti-oxidation coating is prepared from resin, modified filler, an additive and an organic solvent; the resin is selected from at least one of in-situ polymerized rosin, hydrogenated rosin resin, acrylic resin and phenolic resin; the preparation process of the modified filler comprises the steps that metal powder, graphene oxide, carbon nanotubes, water and ethyl alcohol are mixed, then sodium polyacrylate, polyethylene and a silane coupling agent are added, stirring and mixing are carried out, then in the protective gas atmosphere, heating is carried out, heat treatment is carried out, drying is carried out, and the modified filler is obtained. The anti-oxidation coating has good conductivity and is beneficial to eliminating or reducing static electricity, so that the problem that static electricity is generated at the air outlet of the negative ion air purifier is solved, the negative ion concentration at the outlet of the negative ion air purifier is improved, and the purification function of the negative ion air purifier is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of coatings, and in particular relates to an anti-oxidation coating capable of improving ion activity and application thereof. Background Art

[0002] A negative ion air purifier is an environmentally friendly appliance that uses its own negative ions to purify, remove dust, deodorize, and sterilize the air. Unlike traditional air purifiers, it uses negative ions as a catalyst to actively capture harmful airborne substances. Traditional air purifiers use a fan to extract air and a filter to remove dust to purify the air, a process known as passive adsorption and filtration. While traditional air purifiers require regular filter replacement, negative ion air purifiers do not, eliminating the need for regular filter replacement and eliminating consumables.

[0003] Existing negative ion air purifiers do not perform special treatment at the air outlet. When air passes through this area quickly, the air and materials rub against each other at high speed, generating a large amount of static electricity and accelerating oxidation at the gas contact surface. This is especially true when using negative ion air purifiers in low-temperature and low-humidity environments, which can cause static electricity to increase exponentially. Static electricity itself can reduce the number of negative ions in the generated air.

[0004] Therefore, there is an urgent need to provide a coating that eliminates or reduces static electricity, so that the surface of the air outlet of the negative ion air purifier that contacts the gas is not easily oxidized, so that the number of negative ions is larger. Summary of the Invention

[0005] The present invention aims to address at least one of the technical problems existing in the above-mentioned prior art. To this end, the present invention provides an antioxidant coating capable of increasing ion activity and its application. The antioxidant coating of the present invention has good conductivity, which helps to eliminate or reduce static electricity, thereby addressing the static electricity generated at the air outlet of a negative ion air purifier. This in turn increases the negative ion concentration at the outlet of the negative ion air purifier, thereby enhancing the purification function of the negative ion air purifier.

[0006] The present invention uses a specific resin in combination with a modified filler to uniformly disperse metal powder, graphene oxide, and carbon nanotubes in the resin system, and forms a coating after the organic solvent evaporates, thereby significantly improving the conductivity of the coating and helping to eliminate or reduce static electricity, thereby solving the problem of static electricity generated at the air outlet of the negative ion air purifier, thereby increasing the negative ion concentration at the outlet of the negative ion air purifier and improving the purification function of the negative ion air purifier.

[0007] Among them, the modified filler is modified by grafting sodium polyacrylate, polyethylene, and silane coupling agent, so that metal powder, graphene oxide, and carbon nanotubes of different geometric dimensions can cooperate with each other to form a three-dimensional conductive network, thereby significantly improving the conductivity of the coating, reducing the resistance of the coating, and having good wear resistance, thereby extending the service life of the coating.

[0008] A first aspect of the present invention provides an anti-oxidation coating capable of increasing ion activity.

[0009] An anti-oxidation coating capable of improving ion activity, the raw material components of which include resin, modified filler, additives, and organic solvent; The resin is selected from at least one of in-situ polymerized rosin, hydrogenated rosin resin, acrylic resin, and phenolic resin; The preparation process of the modified filler includes: mixing metal powder, graphene oxide, carbon nanotubes, water and ethanol, then adding sodium polyacrylate, polyethylene and silane coupling agent, stirring and mixing, and then heating and performing heat treatment under a protective gas atmosphere, and drying to obtain the modified filler.

[0010] Preferably, the weight ratio of the metal powder, graphene oxide, carbon nanotubes, water, ethanol, sodium polyacrylate, polyethylene, and silane coupling agent is 10: (0.1-1): (0.1-0.8): (8-20): (5-10): (1-5): (2-10): (1-9), and more preferably 10: (0.2-0.8): (0.2-0.6): (10-18): (6-10): (2-5): (3-8): (2-8).

[0011] Preferably, the resin is selected from at least one of in-situ polymerized rosin, hydrogenated rosin resin, and acrylic resin.

[0012] Preferably, the heat treatment temperature is 160-180° C., more preferably 170-180° C. At this temperature, the silane coupling agent is conducive to grafting modification of polyethylene and metal powder, graphene oxide, and carbon nanotubes.

[0013] Preferably, the heat treatment time is 1-4 hours, more preferably 2-3 hours.

[0014] Preferably, the metal powder includes at least one of nickel powder, copper powder or cobalt powder.

[0015] Preferably, the mesh size of the metal powder is 200-500 mesh, more preferably 300-400 mesh.

[0016] Preferably, the silane coupling agent is KH560 or KH570, more preferably KH570.

[0017] Preferably, the protective gas comprises nitrogen or a rare gas, such as argon.

[0018] Preferably, the drying temperature is 80-100° C., and the drying time is 1-5 hours.

[0019] Preferably, the additive is selected from at least one of propionic acid, benzoyl acetone, acrylic acid, and acetylacetone. The additive is beneficial to improving the compatibility of the components.

[0020] Preferably, the organic solvent is selected from at least one of diethylene glycol butyl ether, diethylene glycol hexyl ether, triethylene glycol propyl ether, ethylene glycol phenyl ether, and propylene glycol phenyl ether.

[0021] Preferably, a small amount of tungsten powder is added during the preparation of the modified filler. The addition of tungsten powder is beneficial to improving the wear resistance of the coating.

[0022] Preferably, the raw material components of the antioxidant coating, calculated by weight, include 20-50 parts of resin, 30-45 parts of modified filler, 5-12 parts of additives, and 35-45 parts of organic solvent; further preferably, the raw material components of the antioxidant coating, calculated by weight, include 25-45 parts of resin, 35-40 parts of modified filler, 6-10 parts of additives, and 38-40 parts of organic solvent.

[0023] Preferably, in the anti-oxidation coating, the concentration of the organic solvent is 150-800 ppm, for example, 200-500 ppm.

[0024] A second aspect of the present invention provides a method for preparing an antioxidant coating capable of improving ion activity.

[0025] A method for preparing an antioxidant coating capable of improving ion activity comprises the following steps: The raw material components are mixed, coated on a substrate, and allowed to stand to obtain the anti-oxidation coating.

[0026] Preferably, the substrate may be a component of a negative ion air purifier.

[0027] Preferably, the coating amount is 30-90 gm2, more preferably 40-80 gm2.

[0028] Preferably, the substrate comprises PC (polycarbonate) or ABS (acrylonitrile butadiene styrene copolymer) material.

[0029] A third aspect of the present invention provides an application of an anti-oxidation coating capable of improving ion activity.

[0030] A negative ion air purifier comprises the above-mentioned anti-oxidation coating.

[0031] Preferably, the anti-oxidation coating is located at the air outlet, the fixing clamping component, the shading component and / or the ion buffer zone of the negative ion air purifier.

[0032] Compared with the prior art, the present invention has the following beneficial effects: (1) The present invention uses a specific resin combined with a modified filler to uniformly disperse metal powder, graphene oxide, and carbon nanotubes in the resin system. After the organic solvent evaporates, a coating is formed, thereby significantly improving the conductivity of the coating and helping to eliminate or reduce static electricity, thereby increasing the negative ion concentration at the outlet of the negative ion air purifier and improving the purification function of the negative ion air purifier.

[0033] (2) Preferably, a small amount of tungsten powder is added during the preparation of the modified filler. The addition of tungsten powder is beneficial to improving the wear resistance of the coating, thereby helping to extend the service life of the coating. DETAILED DESCRIPTION

[0034] Below in conjunction with the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, it is obvious that described embodiment is only a part of embodiment of the present invention, rather than whole embodiment. Based on the embodiment in the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative work premise all fall within the scope of protection of the present invention. Raw materials, reagents or devices used in the following examples, unless otherwise specified, can be obtained from conventional commercial sources, or can be obtained by existing known methods.

[0035] Example 1

[0036] An antioxidant coating capable of improving ion activity, the raw material components of which, by weight, include 40 parts of resin (acrylic resin), 30 parts of modified filler, 5 parts of additive (benzoyl acetone), and 40 parts of organic solvent (the organic solvent is composed of diethylene glycol butyl ether and diethylene glycol hexyl ether in a volume ratio of 1:1); The preparation process of the modified filler includes: mixing metal nickel powder (350-400 mesh), graphene oxide, carbon nanotubes, water, and ethanol, then adding sodium polyacrylate, polyethylene, and silane coupling agent KH570, stirring and mixing at 1000 rpm for 30 minutes, then heating under an argon atmosphere for heat treatment at a temperature of 180°C and a time of 2.5 hours. After the heat treatment, the product is dried at a temperature of 100°C and a time of 2 hours to obtain the modified filler; the weight ratio of the metal nickel powder, graphene oxide, carbon nanotubes, water, ethanol, sodium polyacrylate, polyethylene, and silane coupling agent KH570 is 10:0.5:0.5:15:7:4:5:4.

[0037] A method for preparing an antioxidant coating capable of improving ion activity comprises the following steps: The raw material components were mixed, coated on an ABS substrate in an amount of 70 gm2, and allowed to stand for 12 hours to obtain an anti-oxidation coating.

[0038] Example 2

[0039] An antioxidant coating capable of improving ion activity, the raw material components of which, by weight, include 50 parts of resin (hydrogenated rosin resin), 35 parts of modified filler, 10 parts of additive (acrylic acid), and 45 parts of organic solvent (the organic solvent is composed of triethylene glycol propyl ether and ethylene glycol phenyl ether in a volume ratio of 1:1); The preparation process of the modified filler includes: mixing metal nickel powder (350-400 mesh), graphene oxide, carbon nanotubes, water, and ethanol, then adding sodium polyacrylate, polyethylene, and silane coupling agent KH570, stirring and mixing at 1000 rpm for 30 minutes, then heating under an argon atmosphere for heat treatment at a temperature of 175°C and a time of 3 hours. After the heat treatment, the product is dried at a temperature of 100°C and a time of 3 hours to obtain the modified filler; the weight ratio of the metal nickel powder, graphene oxide, carbon nanotubes, water, ethanol, sodium polyacrylate, polyethylene, and silane coupling agent KH570 is 10:0.7:0.6:12:6:5:5:6.

[0040] A method for preparing an antioxidant coating capable of improving ion activity comprises the following steps: The raw material components were mixed, coated on an ABS substrate in an amount of 70 gm2, and allowed to stand for 12 hours to obtain an anti-oxidation coating.

[0041] Example 3

[0042] An antioxidant coating capable of improving ion activity, the raw material components of which, by weight, include 40 parts of resin (acrylic resin), 30 parts of modified filler, 5 parts of additive (benzoyl acetone), and 40 parts of organic solvent (the organic solvent is composed of diethylene glycol butyl ether and diethylene glycol hexyl ether in a volume ratio of 1:1); The preparation process of the modified filler includes: mixing metal nickel powder (350-400 mesh), tungsten powder (350-400 mesh), graphene oxide, carbon nanotubes, water, and ethanol, then adding sodium polyacrylate, polyethylene, and silane coupling agent KH570, stirring and mixing at 1000 rpm for 30 minutes, then heating under an argon atmosphere for heat treatment at a temperature of 180°C and a time of 2.5 hours, and drying the product after the heat treatment at a temperature of 100°C and a time of 2 hours to obtain the modified filler; the weight ratio of the metal nickel powder, tungsten powder, graphene oxide, carbon nanotubes, water, ethanol, sodium polyacrylate, polyethylene, and silane coupling agent KH570 is 10:2.5:0.5:0.5:15:7:4:5:4.

[0043] A method for preparing an antioxidant coating capable of improving ion activity comprises the following steps: The raw material components were mixed, coated on an ABS substrate in an amount of 70 gm2, and allowed to stand for 12 hours to obtain an anti-oxidation coating.

[0044] Comparative Example 1 Compared with Example 1, the only difference of Comparative Example 1 is that the modified filler in Example 1 is replaced by an equal amount of mixed filler, and the rest of the process is the same as that of Example 1.

[0045] The mixed filler of Comparative Example 1 is obtained by directly mixing metal nickel powder (350-400 mesh), graphene oxide, and carbon nanotubes in a weight ratio of 10:0.5:0.5.

[0046] Comparative Example 2 Compared with Example 1, the only difference in Comparative Example 2 is that the polyethylene in Example 1 is replaced by an equal amount of polycarbonate, and the rest of the process is the same as that of Example 1.

[0047] Comparative Example 3 Compared with Example 1, the only difference of Comparative Example 3 is that the additive in Example 1 is replaced by an equal amount of acrylic resin, and the rest of the process is the same as that of Example 1.

[0048] Product effect testing 1. Resistivity test The surface resistivity of the coatings prepared in Examples 1-3 and Comparative Examples 1-3 was tested according to GB / T 16906-1997. The results are shown in Table 1.

[0049] Table 1 project Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Comparative Example 3 Resistivity (Ω·cm) <![CDATA[1.0×10 -5 ]]> <![CDATA[1.2×10 -5 ]]> <![CDATA[0.8×10 -5 ]]> <![CDATA[4.5×10 -5 ]]> <![CDATA[3.1×10 -5 ]]> <![CDATA[1.9×10 -5 ]]> It can be seen from Table 1 that the coating prepared in the example has a smaller resistivity. It can also be seen from this that the coating prepared in the example has good conductivity, thereby solving the static electricity problem.

[0050] 2. Wear resistance test The coatings of Example 1, Example 3, and Comparative Example 1 were used as test samples. White cotton cloth was used as a friction object, a 50 g weight was applied, and dry rubbing was performed at a rubbing speed of 40 times / minute. The number of frictions until visible scratches began to appear on the coating was recorded. A greater number of frictions indicates better wear resistance. The results are shown in Table 2.

[0051] Table 2 project Example 1 Example 3 Comparative Example 1 Number of frictions 30 38 12 It can be seen from Table 2 that the coatings prepared in the examples of the present invention have good wear resistance. Moreover, it can be seen from the results of Example 3 and Example 1 that in the preparation process of the modified filler, the addition of tungsten powder helps to improve the wear resistance of the coating, thereby helping to increase the service life of the coating.

[0052] 3. Negative ion concentration test The above-mentioned Example 1, the coating supported on the ABS substrate, and the ABS substrate (blank control) were respectively used as the air outlet components of the negative ion air purifier. The ion concentration at a distance of 5 cm from the air outlet was tested under the conditions of relative humidity of 63% and temperature of 20.6°C. A total of 33 tests were conducted at different time points within the time period of 14:00-17:36. The results are shown in Table 3.

[0053] Table 3 Number of tests <![CDATA[Blank control (pcs / cm 3 )]]> <![CDATA[Example 1 (pcs / cm 3 )]]> 1st time 6032 35439 2nd time 4869 48302 3rd time 6121 36061 4th time 5791 47153 5th 7656 58599 6th 3718 50034 7th 7883 30042 8th 2176 29668 9th 3261 32462 10th 5160 26057 11th 4495 26624 12th 6080 29179 13th 8644 33076 14th 5718 56116 15th 4614 54911 16th 2639 78609 17th 6651 70888 18th 3601 81084 19th 5699 34119 20th 2134 69378 21st 2250 28003 22nd 4040 29028 23rd 4334 31336 24th 2916 21881 25th 6123 30447 26th 3263 22079 27th 3423 33288 28th 4711 30827 29th 2639 27684 30th 3128 29405 31st 2006 30440 32nd 3213 34675 33rd 3993 42511 As can be seen from Table 3, the negative ion concentration at the air outlet of the negative ion air purifier using the coating of the present invention is significantly higher than that of the blank control.

[0054] The above-mentioned method of using the antioxidant coating that improves ion activity is because the antioxidant coating itself has a low resistance, for example, less than 10 ohms, and is an excellent conductive material. Through efficient conductivity, the generation of static electricity is greatly reduced. The nickel element in the antioxidant coating that improves ion activity promotes photocatalysis, further improving the generation of photocatalysts. At the same time, combined with the light absorption of the antioxidant coating that improves ion activity itself, the risk of light leakage inside the device is improved, greatly improving the user experience. In addition, because the coating itself isolates the gas from direct contact with the PC (polycarbonate) + ABS (acrylonitrile-butadiene-styrene copolymer) material, the oxidation of the PC+ABS material is reduced, thereby extending the service life of the device.

[0055] It should be noted that, in this document, terms such as "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements that are inherent to such process, method, article or apparatus.

[0056] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An antioxidant coating capable of increasing ion activity, characterized in that: Its raw material components include resin, modified filler, additives, and organic solvent; The resin is selected from at least one of in-situ polymerized rosin, hydrogenated rosin resin, acrylic resin, and phenolic resin; The preparation process of the modified filler includes: mixing metal powder, graphene oxide, carbon nanotubes, water and ethanol, then adding sodium polyacrylate, polyethylene and silane coupling agent, stirring and mixing, and then heating and performing heat treatment under a protective gas atmosphere, and drying to obtain the modified filler.

2. The anti-oxidation coating according to claim 1, characterized in that The weight ratio of the metal powder, graphene oxide, carbon nanotubes, water, ethanol, sodium polyacrylate, polyethylene, and silane coupling agent is 10: (0.1-1): (0.1-0.8): (8-20): (5-10): (1-5): (2-10): (1-9).

3. The anti-oxidation coating according to claim 1, characterized in that The heat treatment temperature is 160-180° C.; and / or the heat treatment time is 1-4 hours.

4. The anti-oxidation coating according to claim 1, characterized in that The metal powder includes at least one of nickel powder, copper powder or cobalt powder.

5. The anti-oxidation coating according to claim 1, characterized in that The silane coupling agent is KH560 or KH570; and / or the drying temperature is 80-100° C., and the drying time is 1-5 hours.

6. The anti-oxidation coating according to claim 1, characterized in that The additive is selected from at least one of propionic acid, benzoyl acetone, acrylic acid, and acetylacetone.

7. The anti-oxidation coating according to claim 1, characterized in that The organic solvent is selected from at least one of diethylene glycol butyl ether, diethylene glycol hexyl ether, triethylene glycol propyl ether, ethylene glycol phenyl ether, and propylene glycol phenyl ether.

8. The anti-oxidation coating according to any one of claims 1 to 7, characterized in that: The raw material components of the anti-oxidation coating include, by weight, 20-50 parts of resin, 30-45 parts of modified filler, 5-12 parts of additives, and 35-45 parts of organic solvent.

9. The method for preparing the anti-oxidation coating according to any one of claims 1 to 8, characterized in that: The following steps are involved: The raw material components are mixed, coated on a substrate, and allowed to stand to obtain the anti-oxidation coating.

10. A negative ion air purifier, characterized in that: The invention comprises the anti-oxidation coating according to any one of claims 1 to 8.