Photo-thermal super-hydrophobic mildew-proof moss-proof coating as well as preparation method and application thereof

Abstract

The invention discloses a photo-thermal super-hydrophobic mildew-proof moss-proof coating as well as a preparation method and application thereof, and belongs to the technical field of functional materials, the coating comprises the following components in parts by weight: 6-10 parts of a curing agent, 2-4 parts of a catalyst, 60-80 parts of base glue, 14-20 parts of an adhesive force and formability modification additive and 80-100 parts of a hydrophobic particle solution; wherein the base adhesive comprises silicone oil, a photo-thermal filler and a mildew-proof additive in a mass ratio of (30-40): (28-36): (2-4); the preparation method comprises the following steps: primarily mixing a photo-thermal filler with silicone oil and a mildew-proof additive, and carrying out banburying, dispersion and grinding to obtain base rubber; the preparation method comprises the following steps: uniformly mixing and dispersing the base glue, the adhesive force and formability modification additive and the hydrophobic particle solution, adding the curing agent and the catalyst, continuously mixing and dispersing uniformly, and finally vacuumizing to obtain the photo-thermal super-hydrophobic mildew-proof moss-proof coating. According to the photo-thermal super-hydrophobic mildew-proof moss-proof coating, the preparation method thereof and the cement-based material, the self-repairing function and application are achieved, multidirectional mildew-proof moss-proof can be achieved, the mildew-proof moss-proof effect is improved, and the timeliness is long.

Description

Technical Field

[0001] The present invention relates to a photothermal superhydrophobic mold and moss-proof coating, a preparation method thereof, and an application thereof, belonging to the technical field of functional materials. Background Art

[0002] In humid areas, molds and mosses are likely to grow on the surfaces of materials and equipment, resulting in their corrosion and damage, thereby affecting the service life of the materials and equipment, increasing the risk of damage and the frequency of maintenance. At the same time, the growth of molds and mosses will absorb substances such as moisture and salts in the air. On the surface of electrical equipment, especially those with insulating functions, it will affect the insulation performance of the substrate and increase the risk of equipment failure. The large growth of molds and mosses will also cover the surface of the substrate, reducing the heat dissipation capacity of the equipment, causing temperature control imbalance, and increasing the possibility of equipment overheating. In China, the problem of mold and moss growth mostly appears in southern regions, which generally have tropical and subtropical climates. At the same time, the conditions for moss growth are often closely related to the surrounding environment, such as adjacent fish ponds and pools. Such areas contain organic microorganisms, and together with the warm and humid environment, they provide an excellent basic environment for the growth of molds and mosses.

[0003] For conventional cleaning methods, such as water flushing and physical wiping, they have a certain effect on reducing molds. However, molds often secrete adhesive substances on the surface of the breeding sites and even penetrate into the interior of the substrate, greatly increasing the adhesion strength, making them adhere tightly and not easily fall off completely. Physical wiping will still leave mold stain marks. Special agents and cleaning agents are only temporary treatment means, with poor long-term effectiveness and may damage the surface of the substrate. Currently, the research focuses on two aspects. On the one hand, it is to study special mold cleaning agents, which need to have targeted treatment effects on molds and mosses. On the other hand, it is to design coatings with mold and moss-proof functions. After coating the target surface with a coating, it can have long-term mold and moss-proof capabilities. This method is more practical and convenient. On the basis of saving material and human resources, it can achieve good mold and moss-proof capabilities. However, at the same time, the performance requirements for the coating will be more complex. In the prior art, only mold-proof components are added to the coating, and the long-term mold-proof effectiveness is poor. The effective components are consumables and gradually decrease over time. In addition, the function is single, and the single-function mold-proof means cannot achieve high-level and high-degree mold-proof effects. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the defects of the prior art and provide a photothermal superhydrophobic mold and moss-proof coating, a preparation method thereof, and an application thereof, which can achieve multi-faceted mold and moss prevention, improve the mold and moss prevention effect, and have a long timeliness.

[0005] To solve the above technical problems, the technical solution adopted by the present invention is as follows:

[0006] In a first aspect, the present invention provides a photothermal superhydrophobic mold and moss-proof coating, which is characterized in that, by weight, it includes 6 to 10 parts of a curing agent, 2 to 4 parts of a catalyst, 60 to 80 parts of a base glue, 14 to 20 parts of an adhesion and formability modifying aid, and 80 to 100 parts of a hydrophobic particle solution;

[0007] Among them, the base glue includes silicone oil, a photothermal filler, and a mold-proof aid with a mass ratio of 30 to 40:28 to 36:2 to 4.

[0008] The photothermal filler includes a filler powder and a hydrophobic modification aid with a mass ratio of 26 to 32:2 to 4. The filler powder includes one or more of carbon black, nano-aluminum hydroxide, nano-calcium carbonate, and cuprous oxide. The hydrophobic modification aid includes one or more of hexamethyldisilazane and perfluorodecyltrimethoxysilane.

[0009] The catalyst includes one or more of dibutyltin dilaurate and stannous octoate.

[0010] The silicone oil includes one or more of hydroxy silicone oil with a molecular weight of 50,000 to 60,000, hydroxy silicone oil with a molecular weight of 20,000 to 25,000, and hydroxy silicone oil with a molecular weight of 12,000 to 15,000.

[0011] The curing agent includes one or more of methyltributanone oxime silane, vinyltributanone oxime silane, and methyltriacetone oxime silane.

[0012] The hydrophobic particle solution includes hydrophobic particles and a solvent with a mass ratio of 15 - 20:65 - 80. The hydrophobic particles include one or more of nano-titanium dioxide and nano-silicon dioxide. The solvent includes one or more of ethanol, isopropanol, toluene, acetone, and tetrahydrofuran.

[0013] The adhesion and formability modifying aid includes one or more of KH-550 coupling agent, KH-560 coupling agent, KH-570 coupling agent, hexamethylsiloxane, and BYK-012 defoaming agent.

[0014] The mold-proof aid includes one or more of 1,2-benzisothiazoline, methyl benzimidazole carbamate, and tetramethylthiuram disulfide.

[0015] In a second aspect, the present invention provides a preparation method of a photothermal superhydrophobic mold and moss-proof coating, including the following steps:

[0016] Mix and disperse the photothermal filler powder and the hydrophobic modification aid with deionized water and ethanol for hydrophobic modification to obtain a dispersion;

[0017] Disperse and dry the dispersion liquid to obtain a photothermal filler, and then premix the photothermal filler with silicone oil and a mold-proofing agent. After kneading, dispersing, and grinding in a two-roll mill, a vacuum kneader, and a three-roll grinder in sequence, a base rubber is obtained;

[0018] Disperse and mix the hydrophobic particles with a solvent to obtain a hydrophobic particle solution;

[0019] Mix and disperse the base rubber, adhesion and formability modification agents, and the hydrophobic particle solution evenly, then add a curing agent and a catalyst and continue to mix and disperse evenly. Finally, evacuate to obtain a photothermal superhydrophobic mold-proofing and moss-proofing coating.

[0020] In a third aspect, the present invention provides an application of the photothermal superhydrophobic mold-proofing and moss-proofing coating in electrical equipment.

[0021] Advantages of the present invention: A photothermal superhydrophobic mold-proofing and moss-proofing coating, its preparation method and application provided by the present invention, by weight, include a curing agent, a catalyst, a base rubber, adhesion and formability modification agents, and a hydrophobic particle solution; wherein, the base rubber includes silicone oil, a photothermal filler, and a mold-proofing agent. Functional particles with hydrophobic and photothermal properties are combined in the coating, which can prevent water vapor from staying on the surface of the coating and greatly reduce the accumulation of water, which is one of the necessary conditions for the growth of a large number of molds. At the same time, the photothermal component absorbs light energy and heats up, providing a temperature environment that is not conducive to the growth of molds and moss. In summary, the present invention modifies the coating from two aspects of temperature and humidity to achieve the functions of superhydrophobicity and photothermal, provides an environment that is not conducive to the growth of molds and moss, can achieve multi-faceted mold-proofing and moss-proofing, improve the mold-proofing and moss-proofing effect, and has a long timeliness. Description of the Drawings

[0022] Figure 1 It is a preparation flow chart of a photothermal superhydrophobic mold-proofing and moss-proofing coating of the present invention. Detailed Embodiments

[0023] The present invention will be further described below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and cannot be used to limit the protection scope of the present invention.

[0024] Example 1

[0025] The present invention discloses a photothermal superhydrophobic mold-proofing and moss-proofing coating, which, by weight, includes 6 parts of a curing agent, 4 parts of a catalyst, 60 parts of a base rubber, 20 parts of adhesion and formability modification agents, and 80 parts of a hydrophobic particle solution; wherein, the base rubber includes silicone oil, a photothermal filler, and a mold-proofing agent in a mass ratio of 40:28:4.

[0026] Among them, the photothermal filler includes a filler powder and a hydrophobic modification aid with a mass ratio of 26:4. The filler powder includes one or more of carbon black, nano aluminum hydroxide, nano calcium carbonate, and cuprous oxide, and is preferably carbon black in this embodiment. The hydrophobic modification aid includes one or more of hexamethyldisilazane and perfluorodecyltrimethoxysilane, and is preferably hexamethyldisilazane in this embodiment.

[0027] Among them, the catalyst includes one or more of dibutyltin dilaurate and stannous octoate, and is preferably dibutyltin dilaurate in this embodiment. The silicone oil includes one or more of hydroxy silicone oil with a molecular weight of 50,000 - 60,000, hydroxy silicone oil with a molecular weight of 20,000 - 25,000, and hydroxy silicone oil with a molecular weight of 12,000 - 15,000, and is preferably hydroxy silicone oil with a molecular weight of 50,000 - 60,000 in this embodiment.

[0028] Among them, the curing agent includes one or more of methyltributanone oxime silane, vinyltributanone oxime silane, and methyltriacetone oxime silane, and is preferably methyltributanone oxime silane in this embodiment.

[0029] Among them, the hydrophobic particle solution includes hydrophobic particles and a solvent with a mass ratio of 15:80. The hydrophobic particles include one or more of nano titanium dioxide and nano silicon dioxide, and are preferably nano titanium dioxide in this embodiment. The solvent includes one or more of ethanol, isopropanol, toluene, acetone, and tetrahydrofuran, and is preferably ethanol in this embodiment.

[0030] The adhesion and formability modification aids include one or more of KH-550 coupling agent, KH-560 coupling agent, KH-570 coupling agent, hexamethylsiloxane, and BYK-012 defoamer, and are preferably KH-550 coupling agent in this embodiment.

[0031] The mildew-proof aid includes one or more of 1,2-benzisothiazoline, methyl benzimidazole carbamate, and tetramethylthiuram disulfide, and is preferably 1,2-benzisothiazoline in this embodiment.

[0032] As Figure 1 shown, the present invention provides a preparation method of a photothermal superhydrophobic mildew-proof and moss-proof coating, including the following steps:

[0033] Step 1, mix and disperse the photothermal filler powder and the hydrophobic modification aid with deionized water and ethanol for hydrophobic modification to obtain a dispersion.

[0034] Step 2, disperse and dry the dispersion to obtain the photothermal filler, then preliminarily mix the photothermal filler with the silicone oil and the mildew-proof aid, and successively carry out kneading, dispersion, and grinding through an open mill, a vacuum kneader, and a three-roll grinder to obtain the base rubber.

[0035] Step 3: Dispersedly mix the hydrophobic particles with the solvent to obtain a hydrophobic particle solution.

[0036] Step 4: Dispersedly mix the base glue, the adhesion and formability modifying additives, and the hydrophobic particle solution evenly, then add the curing agent and the catalyst and continue to mix evenly, and finally evacuate to obtain the photothermal superhydrophobic mildew and moss-proof coating.

[0037] The present invention finally also discloses the application of the photothermal superhydrophobic mildew and moss-proof coating in electrical equipment.

[0038] Through copolymerization and organic-inorganic hybridization techniques, the present invention modifies the main chain and side chain of the reactants with additives, organically combines the superhydrophobic, photothermal and other functional fillers in the raw materials with the polymer matrix (silicone oil), and evenly disperses them in the coating, realizing the uniform dispersion and high-strength combination of the functional powder and the matrix providing strength, which is different from the single function of the previous process, and the basic performance of the coating is not affected. The adhesion of the coating > 2.5 MPa, the contact angle is greater than 150°, the algae-proof performance is level 0, and the tensile strength > 3 Mpa.

[0039] Example 2

[0040] The present invention discloses a photothermal superhydrophobic mildew and moss-proof coating, which, by weight, comprises 10 parts of curing agent, 2 parts of catalyst, 80 parts of base glue, 14 parts of adhesion and formability modifying additives, and 100 parts of hydrophobic particle solution; wherein, the base glue comprises silicone oil, photothermal filler and mildew-proof additive with a mass ratio of 30:36:2.

[0041] Among them, the photothermal filler comprises filler powder and hydrophobic modifying additive with a mass ratio of 32:2. The filler powder comprises one or more of carbon black, nano-aluminum hydroxide, nano-calcium carbonate and cuprous oxide, and is preferably nano-aluminum hydroxide in this example. The hydrophobic modifying additive comprises one or more of hexamethyldisilazane and perfluorodecyltrimethoxysilane, and is preferably perfluorodecyltrimethoxysilane in this example.

[0042] Among them, the catalyst comprises one or more of dibutyltin dilaurate and stannous octoate, and is preferably stannous octoate in this example. The silicone oil comprises one or more of hydroxy silicone oil with a molecular weight of 50,000 - 60,000, hydroxy silicone oil with a molecular weight of 20,000 - 25,000, and hydroxy silicone oil with a molecular weight of 12,000 - 15,000, and is preferably hydroxy silicone oil with a molecular weight of 20,000 - 25,000 in this example.

[0043] Among them, the curing agent comprises one or more of methyltributanoneoxime silane, vinyltributanoneoxime silane and methyltriacetoneoxime silane, and is preferably vinyltributanoneoxime silane in this example.

[0044] Among them, the hydrophobic particle solution includes hydrophobic particles and a solvent with a mass ratio of 20:65. The hydrophobic particles include one or more of nano-titanium dioxide and nano-silica. In this embodiment, nano-silica is preferably used. The solvent includes one or more of ethanol, isopropanol, toluene, acetone, and tetrahydrofuran. In this embodiment, isopropanol is preferably used.

[0045] The adhesion and formability modifying aids include one or more of KH-550 coupling agent, KH-560 coupling agent, KH-570 coupling agent, hexamethylsiloxane, and BYK-012 defoaming agent. In this embodiment, KH-560 coupling agent is preferably used.

[0046] The mold-proof aids include one or more of 1,2-benzisothiazoline, methyl benzimidazole carbamate, and tetramethylthiuram disulfide. In this embodiment, tetramethylthiuram disulfide is preferably used.

[0047] As Figure 1 shown, the present invention provides a preparation method of a photothermal superhydrophobic mold-proof and moss-proof coating, which includes the following steps:

[0048] Step 1, mix and disperse the photothermal filler powder and the hydrophobic modifying aid with deionized water and ethanol for hydrophobic modification to obtain a dispersion.

[0049] Step 2, disperse and dry the dispersion to obtain the photothermal filler, then premix the photothermal filler with silicone oil and the mold-proof aid, and successively carry out internal mixing, dispersion, and grinding with an open mill, a vacuum kneader, and a three-roll grinder to obtain the base rubber.

[0050] Step 3, disperse and mix the hydrophobic particles and the solvent to obtain a hydrophobic particle solution.

[0051] Step 4, mix and disperse the base rubber, the adhesion and formability modifying aid, and the hydrophobic particle solution evenly, then add a curing agent and a catalyst and continue to mix and disperse evenly, and finally evacuate to obtain the photothermal superhydrophobic mold-proof and moss-proof coating.

[0052] Finally, the present invention also discloses the application of the photothermal superhydrophobic mold-proof and moss-proof coating in electrical equipment.

[0053] Through copolymerization and organic-inorganic hybridization technology, the present invention modifies the main chain and side chain of the reactants with aids, organically combines the superhydrophobic, photothermal and other functional fillers in the raw materials with the polymer matrix (silicone oil), and evenly disperses them in the coating, realizing the uniform dispersion and high-strength combination of the functional powder and the matrix providing strength, which is different from the single function of the previous process, and the basic performance of the coating is not affected. The adhesion of the coating > 2.5 MPa, the contact angle is greater than 150°, the anti-algae performance is grade 0, and the tensile strength > 3 Mpa.

[0054] Example 3

[0055] The present invention discloses a photothermal superhydrophobic mildew-proof and moss-proof coating. By weight, it includes 8 parts of curing agent, 3 parts of catalyst, 70 parts of base glue, 16 parts of adhesion and formability modification aids, and 90 parts of hydrophobic particle solution; wherein, the base glue includes silicone oil, photothermal filler and mildew-proof aid with a mass ratio of 35:30:3.

[0056] Among them, the photothermal filler includes filler powder and hydrophobic modification aid with a mass ratio of 28:3. The filler powder includes one or more of carbon black, nano aluminum hydroxide, nano calcium carbonate and cuprous oxide, and is preferably carbon black in this embodiment. The hydrophobic modification aid includes one or more of hexamethyldisilazane and perfluorodecyltrimethoxysilane, and is preferably hexamethyldisilazane in this embodiment.

[0057] Among them, the catalyst includes one or more of dibutyltin dilaurate and stannous octoate, and is preferably dibutyltin dilaurate in this embodiment. The silicone oil includes one or more of hydroxy silicone oil with a molecular weight of 50,000 - 60,000, hydroxy silicone oil with a molecular weight of 20,000 - 25,000 and hydroxy silicone oil with a molecular weight of 12,000 - 15,000, and is preferably hydroxy silicone oil with a molecular weight of 12,000 - 15,000 in this embodiment.

[0058] Among them, the curing agent includes one or more of methyl tributanone oxime silane, vinyl tributanone oxime silane and methyl triacetone oxime silane, and is preferably methyl triacetone oxime silane in this embodiment.

[0059] Among them, the hydrophobic particle solution includes hydrophobic particles and solvent with a mass ratio of 18:70. The hydrophobic particles include one or more of nano titanium dioxide and nano silicon dioxide, and are preferably nano titanium dioxide in this embodiment. The solvent includes one or more of ethanol, isopropanol, toluene, acetone and tetrahydrofuran, and is preferably acetone in this embodiment.

[0060] The adhesion and formability modification aids include one or more of KH-550 coupling agent, KH-560 coupling agent, KH-570 coupling agent, hexamethyl siloxane and BYK-012 defoamer, and are preferably BYK-012 defoamer in this embodiment.

[0061] The mildew-proof aid includes one or more of 1,2-benzisothiazoline, methyl benzimidazole carbamate and tetramethylthiuram disulfide, and is preferably tetramethylthiuram disulfide in this embodiment.

[0062] As Figure 1 shown, the present invention provides a preparation method of a photothermal superhydrophobic mildew-proof and moss-proof coating, which includes the following steps:

[0063] Step 1, mixing and dispersing the photothermal filler powder and the hydrophobic modification aid with deionized water and ethanol for hydrophobic modification to obtain a dispersion liquid.

[0064] Step 2: Disperse and dry the dispersion liquid to obtain the photothermal filler, then premix the photothermal filler with silicone oil and anti-mildew additives, and successively carry out internal mixing, dispersion, and grinding through an internal mixer, a vacuum kneader, and a three-roll mill to obtain the base rubber.

[0065] Step 3: Disperse and mix the hydrophobic particles with a solvent to obtain a hydrophobic particle solution.

[0066] Step 4: Mix and disperse the base rubber, adhesion and formability modification additives, and the hydrophobic particle solution evenly, then add a curing agent and a catalyst and continue to mix and disperse evenly, and finally evacuate to obtain the photothermal superhydrophobic anti-mildew and anti-algae coating.

[0067] The present invention finally also discloses the application of the photothermal superhydrophobic anti-mildew and anti-algae coating in electrical equipment.

[0068] Through copolymerization and organic-inorganic hybridization technology, the present invention modifies the main chain and side chain of the reactants with additives, organically combines the superhydrophobic, photothermal and other functional fillers in the raw materials with the polymer matrix (silicone oil), and evenly disperses them in the coating, realizing the uniform dispersion and high-strength combination of the functional powder and the matrix providing strength, which is different from the single function of the previous process, and the basic performance of the coating is not affected. The adhesion of the coating > 2.5 MPa, the contact angle is greater than 150°, the anti-algae performance is grade 0, and the tensile strength > 3 Mpa.

[0069] The above are only the preferred embodiments of the present invention. It should be noted that: for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and retouches can be made, and these improvements and retouches should also be regarded as the protection scope of the present invention.

Claims

1. A photothermal super-hydrophobic mildew and moss proof coating, characterized by: Comprising, by weight parts, 6 to 10 parts of curing agent, 2 to 4 parts of catalyst, 60 to 80 parts of base glue, 14 to 20 parts of adhesion and formability modifying agent, and 80 to 100 parts of hydrophobic particle solution; Among them, the base glue comprises silicone oil, photothermal filler and mildew-proofing agent with a mass ratio of 30 to 40: 28 to 36: 2 to 4.

2. The photothermal super-hydrophobic mildew and moss proof coating according to claim 1, characterized in that: The photothermal filler comprises filler powder and hydrophobic modification agent with a mass ratio of 26 to 32: 2 to 4. The filler powder comprises one or more of carbon black, nano-aluminum hydroxide, nano-calcium carbonate and cuprous oxide. The hydrophobic modification agent comprises one or more of hexamethyldisilazane and perfluorodecyltrimethoxysilane.

3. The photothermal super-hydrophobic mildew and moss proof coating according to claim 1, characterized in that: The catalyst comprises one or more of dibutyltin dilaurate and stannous octoate.

4. The photothermal superhydrophobic anti-mildew and anti-moss coating according to claim 1, characterized in that: The silicone oil comprises one or more of hydroxy silicone oil with a molecular weight of 50000 to 60000, hydroxy silicone oil with a molecular weight of 20000 to 25000, and hydroxy silicone oil with a molecular weight of 12000 to 15000.

5. The photothermal superhydrophobic anti-mildew and anti-moss coating according to claim 1, wherein: The curing agent comprises one or more of methyltributanone oxime silane, vinyltributanone oxime silane and methyltriacetone oxime silane.

6. The photothermal super-hydrophobic mildew and moss proof coating according to claim 1, characterized in that: The hydrophobic particle solution comprises hydrophobic particles and solvent with a mass ratio of 15 - 20: 65 - 80. The hydrophobic particles comprise one or more of nano-titanium dioxide and nano-silica. The solvent comprises one or more of ethanol, isopropanol, toluene, acetone and tetrahydrofuran.

7. The photothermal super-hydrophobic mildew and moss proof coating according to claim 1, characterized in that: The adhesion and formability modifying agent comprises one or more of KH-550 coupling agent, KH-560 coupling agent, KH-570 coupling agent, hexamethylsiloxane and BYK-012 defoamer.

8. The photothermal superhydrophobic mildew and moss-proof coating according to claim 1, characterized in that: The mildew-proofing agent comprises one or more of 1,2-benzisothiazoline, methyl benzimidazole carbamate and tetramethylthiuram disulfide.

9. A method for preparing the photothermal superhydrophobic mold and moss-proof coating according to any one of claims 1 to 8, characterized in that: Comprising the following steps: Mix and disperse the photothermal filler powder and the hydrophobic modification agent with deionized water and ethanol for hydrophobic modification to obtain a dispersion; Disperse and dry the dispersion to obtain a photothermal filler. Then premix the photothermal filler with silicone oil and mildew-proofing agent, and successively carry out internal mixing, dispersion and grinding by an open mill, a vacuum kneader and a three-roll mill to obtain the base glue; Disperse and mix the hydrophobic particles and the solvent to obtain a hydrophobic particle solution; Mix and disperse the base glue, the adhesion and formability modifying agent and the hydrophobic particle solution evenly, then add the curing agent and the catalyst and continue to mix and disperse evenly. Finally, evacuate to obtain a photothermal superhydrophobic mildew-proof and moss-proof coating.

10. Application of the photothermal superhydrophobic mildew-proof and moss-proof coating according to any one of claims 1 to 8 in electrical equipment.

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