Preparation method of novel super-hydrophobic coating with super wear resistance, strong alkali resistance and impact resistance

Abstract

The invention provides a preparation method of a novel super-wear-resistant, strong-alkali-resistant and impact-resistant super-hydrophobic coating, which comprises the following steps: coating the surface of a substrate with a super-hydrophobic coating solution, curing and annealing to obtain the novel super-wear-resistant, strong-alkali-resistant and impact-resistant super-hydrophobic coating, the preparation method of the super-hydrophobic coating solution comprises the step of mixing the fluorine-modified epoxy resin-based substance, the curing agent and the super-hydrophobic nanoparticle solution to obtain the super-hydrophobic coating solution. The super-wear-resistant, strong-alkali-resistant and impact-resistant super-hydrophobic coating provided by the invention adopts a layer-by-layer structure method of bionic shells and pearls, and the hydrolysis reaction and self-assembly effect of the super-hydrophobic coating solution enable a nano-structure and a nano-particle structure formed by curing to be in a layer-by-layer self-assembly state, so that the super-wear-resistant, strong-alkali-resistant and impact-resistant super-hydrophobic coating has good wear resistance and strong alkali resistance after friction and high-pressure water impact. And the wear resistance and the super-hydrophobic performance of the super-hydrophobic coating can also keep excellent effects.

Description

Technical Field

[0001] The invention belongs to the technical field of hydrophobic coatings, and in particular relates to a method for preparing a novel super hydrophobic coating that is super wear-resistant, alkali-resistant and impact-resistant. Background Art

[0002] The super-hydrophobic coating has unstable structure and chemical properties (not wear-resistant, not acid-resistant, not resistant to alkali, and not resistant to high-pressure water impact), which is specifically manifested in the low mechanical strength of the coating, not resistant to strong alkali, and being penetrated or detached by high-pressure water impact, which seriously affects the long-term service life of the super-hydrophobic coating. Summary of the invention

[0003] In view of this, the object of the present invention is to provide a method for preparing a novel super-hydrophobic coating that is super wear-resistant, alkali-resistant and impact-resistant. The coating prepared by the method provided by the present invention has good hydrophobicity, and is wear-resistant, alkali-resistant and impact-resistant.

[0004] The present invention provides a method for preparing a novel super-hydrophobic coating that is super wear-resistant, alkali-resistant and impact-resistant, comprising:

[0005] The super-hydrophobic coating solution is coated on the surface of the substrate and then cured and annealed to obtain a new type of super-hydrophobic coating that is super-wear-resistant, strong alkali-resistant and impact-resistant.

[0006] In an embodiment of the present invention, the method for preparing a super-hydrophobic coating solution may include:

[0007] The fluorine-modified epoxy resin-based material, the curing agent and the super-hydrophobic nanoparticle solution are mixed to obtain a super-hydrophobic coating solution.

[0008] In an embodiment of the present invention, the preparation method of the fluorine-modified epoxy resin-based material may include:

[0009] The epoxy resin-based substance, the silane coupling agent, the low surface energy substance and the solvent are mixed to obtain the fluorine-modified epoxy resin-based substance.

[0010] In an embodiment of the present invention, the epoxy resin-based material can be selected from one or more of epoxy resin, polycarbonate-modified epoxy resin, acrylate-modified epoxy resin, polyurethane-modified epoxy resin, silicone-modified epoxy resin or other component-modified epoxy resin; it can also be selected from epoxy resin and polyurethane-modified epoxy resin; the mass ratio of epoxy resin and polyurethane-modified epoxy resin can be (2-3): (1-2). In the embodiment of the present invention, epoxy resin and polyurethane-modified epoxy resin are used in combination to enhance the overall toughness and mechanical strength, especially the epoxy resin modified by polyurethane, which can increase the bonding strength between the super-hydrophobic coating and the substrate.

[0011] In an embodiment of the present invention, the silane coupling agent for preparing the fluorine-modified epoxy resin-based material can be selected from one or more of glycidyloxypropyltrimethoxysilane, vinyltrimethoxysilane, methyltrimethoxysilane, aminopropyltriethoxysilane and aminopropyltrimethoxysilane.

[0012] In an embodiment of the present invention, the low surface energy material for preparing the fluorine-modified epoxy resin-based material can be a fluorosilane-based low surface energy material, which can be selected from one or more of tridecafluorooctyltrimethoxysilane, heptadecafluorodecyltrimethoxysilane, n-octyltriethoxysilane, propyltriacetoxysilane, heptadecafluorodecyltrimethoxysilane or other fluorosilane-based low surface energy materials.

[0013] In an embodiment of the present invention, the solvent may be selected from one or a mixture of anhydrous ethanol, acetone, ethyl acetate, n-propanol, n-butanol, toluene, n-hexane, isopropanol.

[0014] In an embodiment of the present invention, the usage ratio of epoxy resin-based substance, silane coupling agent, low surface energy substance and solvent can be (2-6) g: (0.2-0.4) g: (0.4-0.8) g: (10-20) mL, or (3-5) g: (0.25-0.35) g: (0.5-0.7) g: (12-18) mL, or 4 g: 0.3 g: 0.6 g: (14-16) mL.

[0015] In an embodiment of the present invention, the mixing temperature during the preparation of the fluorine-modified epoxy resin-based material can be 40-50°C, 42-48°C, or 44-46°C; the mixing can be carried out under stirring; the stirring can be magnetic stirring; the stirring speed can be 300-500rpm, 350-450rpm, or 400rpm; the mixing time can be 20-40min, 25-35min, or 30min.

[0016] General super-hydrophobic coating usually has good hydrophobic properties, especially typical super-hydrophobic coating with epoxy resin, but the super-hydrophobic coating prepared by common epoxy resin material is relatively fragile, and it is difficult to withstand mechanical deformation under local high mechanical load, and in the case of strong alkaline solution and high-pressure water impact, the super-hydrophobic coating structure and chemical stability are poor, and even super-hydrophobic properties are lost. In the embodiment of the present invention, epoxy resin-based material is taken, and combined by two or more epoxy resin materials, the shortcomings of simple epoxy resin are improved, and there is the advantages such as improving the inherent strength of super-hydrophobic coating and improving the bonding strength of super-hydrophobic coating and substrate.

[0017] In an embodiment of the present invention, the curing agent may be selected from one or more of ethylenediamine, diethylenetriamine, polymethylenediamine, diethylaminopropylamine or other curing agents.

[0018] In an embodiment of the present invention, the method for preparing a super-hydrophobic nanoparticle solution may include:

[0019] The nanoparticle sol, nanoparticles, a silane coupling agent, a low surface energy substance and a dispersant are mixed to obtain a super-hydrophobic nanoparticle solution.

[0020] In an embodiment of the present invention, the method for preparing the nanoparticle sol may include:

[0021] The nanoparticles, nanoparticle precursor organic compounds, alkaline solution, water and organic reagents are mixed to obtain nanoparticle sol.

[0022] In an embodiment of the present invention, the nanoparticles used to prepare the nanoparticle sol can be selected from one or more of silicon dioxide, titanium dioxide, nano-tungsten oxide, zinc oxide, calcium carbonate, aluminum oxide, manganese dioxide, polytetrafluoroethylene or other nano and micron particles; the average particle size of the nanoparticles can be 20 to 50 nm, 30 to 40 nm, or 35 nm.

[0023] In an embodiment of the present invention, the nanoparticle precursor organic compound can be a nanoparticle precursor organic compound solution; the nanoparticle precursor organic compound can be selected from one or more of tetraethoxysilane, tetrabutyl titanate, zirconium n-butoxide, zinc nitrate dihydrate, methyltriethoxysilane, vinyltriethoxysilane or other organic compounds, or can be selected from tetraethoxysilane and tetrabutyl titanate; the mass ratio of tetraethoxysilane to tetrabutyl titanate can be (2-3): (1-2). In the embodiment of the present invention, tetraethoxysilane and tetrabutyl titanate nanoparticle precursor organic compounds are used to produce hydrolysis and polymerization reactions under alkaline conditions to generate nanoparticles with a size of 20-100 nm, which are combined with the nanoparticles in the preparation process of the super-hydrophobic nanoparticle solution to form a heterogeneous structure. The generated nanoparticles can withstand the corrosion of strong alkaline solutions, and enhance the super-hydrophobicity and mechanical properties at the microscopic level, thereby maximizing the wear resistance and alkali resistance.

[0024] In an embodiment of the present invention, the solute in the alkaline solution can be selected from one or more of ammonia water, sodium hydroxide or other alkaline substances; the solvent in the alkaline solution is water; the pH range of the alkaline solution can be pH 10 to 12, and the concentration of the alkaline solution can be 0.1 to 0.2 mol.L -1 .

[0025] In an embodiment of the present invention, the water may be deionized water.

[0026] In an embodiment of the present invention, the organic reagent can be selected from one or a mixture of anhydrous ethanol, acetone, ethyl acetate, n-propanol, n-butanol, toluene, n-hexane, isopropanol.

[0027] In an embodiment of the present invention, the usage ratio of nanoparticles, nanoparticle precursor organic compound, alkaline solution, water and organic reagent in the process of preparing nanoparticle sol can be (2-6) g: (2-4) mL: (5-10) mL: (2-4) mL: (30-50) mL, or (3-5) g: (2.5-3.5) mL: (6-9) mL: (2.5-3.5) mL: (35-45) mL, or 4 g: 3 mL: (7-8) mL: 3 mL: 40 mL.

[0028] In an embodiment of the present invention, the mixing in the process of preparing the nanoparticle sol can be carried out under stirring conditions, and the stirring can be magnetic stirring; the stirring speed can be 300-500rpm, or 350-450rpm, or 400rpm; the mixing temperature can be 40-60°C, or 45-55°C, or 50°C; the mixing time can be 30-90min, or 40-80min, or 50-70min, or 60min.

[0029] In an embodiment of the present invention, the nanoparticles for preparing the super-hydrophobic nanoparticle solution can be selected from one or more of silicon dioxide, titanium dioxide, nano-tungsten oxide, zinc oxide, calcium carbonate, aluminum oxide, manganese dioxide, polytetrafluoroethylene or other nano- and micron-particles; the average particle size of the nanoparticles can be 20 to 50 nm, 30 to 40 nm, or 35 nm.

[0030] In an embodiment of the present invention, the silane coupling agent for preparing the super-hydrophobic nanoparticle solution can be selected from one or more of glycidyloxypropyltrimethoxysilane, vinyltrimethoxysilane, methyltrimethoxysilane, aminopropyltriethoxysilane and aminopropyltrimethoxysilane.

[0031] In an embodiment of the present invention, the low surface energy material for preparing the super-hydrophobic nanoparticle solution can be a fluorosilane low surface energy material, which can be selected from one or more of tridecafluorooctyltrimethoxysilane, heptadecafluorodecyltrimethoxysilane, n-octyltriethoxysilane, propyltriacetoxysilane or other fluorosilane low surface energy materials.

[0032] In an embodiment of the present invention, the dispersant may be selected from one of BYK183, BYK182, BYK161, BYK110, or a mixture of several thereof.

[0033] In an embodiment of the present invention, the mass ratio of the nanoparticles in the nanoparticle sol and the subsequently added nanoparticles, silane coupling agent, low surface energy substance and dispersant can be (2-6): (2-4): (0.5-1.5): (0.5-1.5): (0.1-0.15), or (3-5): (2.5-3.5): (0.8-1.2): (0.8-1.2): (0.11-0.14), or 4:3:1:1: (0.12-0.13).

[0034] The preparation method of the super-hydrophobic nanoparticle solution used in the embodiment of the present invention is a combination of hydrolysis and polymerization and heterogeneous structure. Usually, the super-hydrophobic coating adopts the method of directly adding nanoparticles or using a single nanoparticle precursor organic compound solution. The present invention enhances the wear resistance and alkali resistance of the coating by using two different nanoparticle precursor organic compound solutions.

[0035] In an embodiment of the present invention, the usage ratio of the fluorine-modified epoxy resin-based substance, the curing agent and the super-hydrophobic nanoparticle solution can be (4-6) mL: (0.5-1.0) g: (30-50) mL, or (4.5-5.5) mL: (0.6-0.9) g: (35-50) mL, or 5 mL: (0.7-0.8) g: (40-45) mL.

[0036] In an embodiment of the present invention, the mixing in the process of preparing the super-hydrophobic coating solution can be carried out under stirring conditions, and the stirring can be magnetic stirring; the mixing temperature can be 40-50°C, or 42-48°C, or 44-46°C; the mixing time can be 60-120min, or 70-110min, or 80-100min, or 90min.

[0037] In an embodiment of the present invention, the coating method may be brush coating, multi-layer coating may be performed, or multi-layer coating may be applied in a horizontal and vertical staggered manner, that is, a coating layer is first applied horizontally, a coating layer is then applied vertically on the horizontal coating layer, and a coating layer is then applied horizontally on the vertical coating layer, and the coating layers are applied alternately horizontally and vertically. In an embodiment of the present invention, the thickness of each coating layer during the horizontal and vertical coating process may be 40 to 60 microns, or 45 to 55 microns, or 50 microns; the total coating thickness after multi-layer coating may be 240 to 350 microns, or 280 to 320 microns, or 300 microns.

[0038] In an embodiment of the present invention, the substrate may be selected from glass, organic glass, plastic products, metals, and the like.

[0039] In an embodiment of the present invention, curing can be carried out in an oven, and the curing temperature can be 110-130°C, 115-125°C, or 120°C; the curing time can be 30-60min, 40-50min, or 45min.

[0040] In an embodiment of the present invention, the annealing temperature may be lowered from the curing temperature to room temperature, such as annealing during the process of lowering the temperature from 120° C. to 25° C.; the annealing time may be 6 to 12 hours.

[0041] In an embodiment of the present invention, a method for preparing a novel super-abrasion-resistant, alkali-resistant and impact-resistant super-hydrophobic coating may include:

[0042] Add 2-6 g of epoxy resin-based material, 0.2-0.4 g of silane coupling agent, and 0.4-0.8 g of fluorosilane low surface energy material into 10-20 mL of organic reagent solution, and stir magnetically at 300-500 rpm / min at 40-50° C. for 20-40 min to form an off-white mixed solution for standby use.

[0043] By hydrolysis and sol-gel method, 2-6g nanoparticles, 2-4mL nanoparticle precursor organic compound (solution), 5-10mL alkaline solution, 2-4mL deionized water are added to 30-50mL organic reagent, and magnetic stirring is carried out at 300-500rpm / min and 40-60℃ for 30-90min to form milky white nanoparticle sol. Subsequently, 2-4g nanoparticles, 0.5-1.5g silane coupling agent, 0.5-1.5g fluorosilane low surface energy material, and 0.1-0.15g dispersant are added to the above nanoparticle sol system to hydrophobically modify the nanoparticle sol to obtain a super-hydrophobic nano solution.

[0044] Take above-mentioned 4~6mL fluorine-modified epoxy resin-based materials, 0.5~1.0g curing agent is added in 30~50mL super-hydrophobic nano solution, by the mixed solution obtained at 40~50 DEG C magnetic agitation 60~120min to obtain super-hydrophobic coating solution, stand-by.The super wear-resistant, alkali-resistant and impact-resistant super-hydrophobic coating solution obtained is coated on the surface (glass, plexiglass, plastics, metal etc.) of specific occasions, and coating mode takes brushing, obtains horizontal and vertical layer structure super-hydrophobic coating, then in 110~130 DEG C baking oven, solidifies 30~60min after, annealing with baking oven, finally obtains super wear-resistant, alkali-resistant and impact-resistant super-hydrophobic coating.

[0045] The present invention provides a preparation technology of super wear-resistant, alkali-resistant and impact-resistant super-hydrophobic coating, and combined with bionic shell and pearl layer structure, the epoxy resin material used in the embodiment belongs to a mixture, and epoxy resin is easily improved on the problem of brittleness, so that super-hydrophobic coating is prompted to have extremely high structure and chemical stability. The super wear-resistant, alkali-resistant and impact-resistant super-hydrophobic coating provided by the embodiment of the present invention can withstand 30 days of sand and gravel scratching, alkali spray and high-pressure water impact environment through real-life testing, and super-hydrophobic coating is related to the disciplines such as polymer material science, micromechanics, organic and inorganic chemistry, and belongs to multidisciplinary cross technology.

[0046] The super-wear-resistant, strong alkali-resistant and impact-resistant super-hydrophobic coating provided by the present invention adopts a layer-by-layer structural method of bionic shells and pearls, that is, a vertical and horizontal brushing method, and a hydrolysis reaction and self-assembly effect of a super-hydrophobic coating solution, so that the nanostructure and nano-particle structure formed by solidification are also in a layer-by-layer self-assembly state, so that after friction and high-pressure water impact, the wear resistance and super-hydrophobicity of the super-hydrophobic coating can also maintain excellent effects. DETAILED DESCRIPTION

[0047] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0048] The epoxy resin used in the following examples of the present invention is a Macklin reagent with an epoxy value of 0.46 to 0.5 mol / 100 g; the polyurethane modified epoxy resin is provided by Zhuzhou Shilin Polymer Co., Ltd. with an epoxy value of 0.4 to 0.46 mol / 100 g.

[0049] Example 1

[0050] Add 2 g of epoxy resin and 2 g of polyurethane-modified epoxy resin, 0.2 g of aminopropyltriethoxysilane, and 0.4 g of heptadecafluorodecyltrimethoxysilane into 10 mL of acetone, and stir magnetically at 300 rpm for 30 min at 50° C. to form an off-white mixed solution for standby use.

[0051] By hydrolysis polymerization and sol-gel method, 2g of nano titanium dioxide (40nm), 2mL of tetraethoxysilane, 2mL of tetrabutyl titanate, 5mL of ammonia water, and 2mL of deionized water were added to 30mL of anhydrous ethanol, and magnetically stirred at 300rpm and 60℃ for 60min to form a milky white nanoparticle sol. Subsequently, 3g of nano titanium dioxide (20nm), 1.0g of aminopropyltriethoxysilane, 0.5g of heptadecafluorodecyltrimethoxysilane, and 0.1g of dispersant BYK183 were added to the above nanoparticle sol system to hydrophobically modify the nanoparticle sol to obtain a super-hydrophobic nano solution.

[0052] Take the fluorine-modified epoxy resin-based material prepared above 4mL, 0.5g diethylenetriamine adds in the above-mentioned super-hydrophobic nano solution of 30mL, by mixed solution magnetic agitation 60min at 50 DEG C, obtain super-hydrophobic coating solution, stand-by.The super-hydrophobic coating solution obtained is coated on stainless steel metal surface, and coating mode takes brushing, and the mode of horizontal and vertical alternating brushing carries out multilayer coating, and the coating thickness of each layer is 50 microns, and the total coating thickness after coating is 300 microns, then after curing 60min in 120 DEG C baking oven, annealing (annealing temperature is cooling to 25 DEG C from 120 DEG C, time is 6~12h) with baking oven, obtain super wear-resistant, strong alkali-resistant and impact-resistant super-hydrophobic coating.

[0053] Example 2

[0054] Add 5 g of epoxy resin, 0.5 g of aminopropyltrimethoxysilane and 0.5 g of tridecafluorooctyltrimethoxysilane into 20 mL of acetone solution, stir magnetically at 400 rpm for 40 min at 60° C. to form an off-white mixed solution for standby use.

[0055] By hydrolysis polymerization and sol-gel method, 4g of nano-titanium dioxide (40nm), 3mL of tetraethoxysilane, and 3mL of 0.1molL -1 Sodium hydroxide solution and 1 mL of deionized water were added to 40 mL of anhydrous ethanol solution, and magnetically stirred at 400 rpm and 50° C. for 90 min to form a milky white nanoparticle sol. Subsequently, 2 g of nano-titanium dioxide (40 nm), 1.0 g of aminopropyltrimethoxysilane, 1.5 g of tridecafluorooctyltrimethoxysilane, and 0.2 g of dispersant BYK182 were added to the above nanoparticle sol system to hydrophobically modify the nanoparticle sol to obtain a super-hydrophobic nanosolution.

[0056] Take 5mL of the above-prepared fluorine-modified epoxy resin-based material, 1.0g diethylaminopropylamine is added in the above-mentioned super-hydrophobic nano solution of 40mL, and mixed solution is magnetically stirred for 60min at 50 DEG C, obtains super-hydrophobic coating solution, stand-by. The super-hydrophobic coating solution obtained is applied to the organic glass surface, and the coating method takes brushing, and the horizontal and vertical alternate brushing mode carries out multilayer coating, and the coating thickness of each layer is 40 microns, and the total coating thickness after coating is 240 microns, then after curing 60min in 120 DEG C baking oven, annealing (annealing temperature is cooling to 25 DEG C from 120 DEG C, time is 6~12h) with baking oven, obtain super wear-resistant, strong alkali-resistant and impact-resistant super-hydrophobic coating.

[0057] Example 3

[0058] Add 6 g of polyurethane modified epoxy resin, 1.0 g of glycidyloxypropyltrimethoxysilane, and 2.0 g of n-octyltriethoxysilane into 20 mL of acetone solution, and stir the mixture with magnetic force at 500 rpm for 60 min at 40° C. to form an off-white mixed solution for standby use.

[0059] By hydrolysis and sol-gel methods, 5 g of nano titanium dioxide (20 nm), 5 mL of tetrabutyl titanate, 10 mL of ammonia water, and 2 mL of deionized water were added to 50 mL of anhydrous ethanol, and magnetically stirred at 500 rpm and 50 ° C for 120 min to form a milky white nanoparticle sol. Subsequently, 1 g of nano titanium dioxide (20 nm), 0.5 g of glycidyloxypropyl trimethoxysilane, 2.0 g of n-octyl triethoxysilane, and 0.3 g of dispersant BYK161 were added to the above nanoparticle sol system to hydrophobically modify the nanoparticle sol to obtain a super-hydrophobic nano solution.

[0060] Take the fluorine-modified epoxy resin-based material prepared above by 6mL, 1.5g diethylenetriamine adds in the above-mentioned super-hydrophobic nano solution of 45mL, by mixed solution magnetically stirred 60min at 50 DEG C, obtain super-hydrophobic coating solution, stand-by.The super-hydrophobic coating solution obtained is coated on glass surface, and coating mode takes brushing, and the mode of horizontal and vertical alternating brushing carries out multilayer coating, and the coating thickness of each layer is 60 microns, and the total coating thickness after coating is 360 microns, then after curing 60min in 120 DEG C baking oven, annealing (annealing temperature is cooling to 25 DEG C from 120 DEG C, time is 6~12h) with baking oven, obtain super wear-resistant, strong alkali-resistant and impact-resistant super-hydrophobic coating.

[0061] Performance Testing

[0062] The coating prepared in the embodiment of the present invention was tested for performance, and the testing method was as follows:

[0063] Taber abrasion tester friction, ASTMD4060 standard, 1kg force, after 1000 cycles, the contact angle is greater than 140°, and the rolling angle is less than 20°; alkali resistance GB / T 9755 standard, saturated calcium hydroxide solution soaked for 48h, the contact angle is greater than 140°, and the rolling angle is less than 20°; 2MPa high pressure water impact test, the super hydrophobic coating has no shedding and breakdown, the contact angle is greater than 140°, and the rolling angle is less than 20°. The test instrument for the contact angle and rolling angle is a contact angle meter (TBU gOE, Dataphysics).

[0064] The test results are as follows: the contact angle of the wear-resistant test of the coating prepared in Example 1 is 156°, and the rolling angle is 9°; the contact angle of the alkali-resistant test is 155°, and the rolling angle is 9°; the impact-resistant test shows no coating shedding and breakdown, and the contact angle is 152°, and the rolling angle is 13°. The contact angle of the wear-resistant test of the coating prepared in Example 2 is 153°, and the rolling angle is 12°; the contact angle of the alkali-resistant test is 153°, and the rolling angle is 13°; the impact-resistant test shows no coating shedding and breakdown, and the contact angle is 147°, and the rolling angle is 16°. The contact angle of the wear-resistant test of the coating prepared in Example 3 is 152°, and the rolling angle is 14°; the contact angle of the alkali-resistant test is 152°, and the rolling angle is 17°; the impact-resistant test shows no coating shedding and breakdown, and the contact angle is 150°, and the rolling angle is 17°.

[0065] The super-wear-resistant, strong alkali-resistant and impact-resistant super-hydrophobic coating prepared in the embodiment of the present invention has excellent wear-resistant properties, can withstand 1000 or more wear cycles of 1kg Taber wear instrument (300 mesh sandpaper friction test, under 1kg load, the super-hydrophobicity is not affected at all under the same 1000 cycles of friction), withstand 50h of immersion in a calcium hydroxide solution with a pH value of 13, and take out and immediately detect the water contact angle, which is still above 150°. In addition, the super-hydrophobic coating of the present invention can withstand 2MPa high-pressure water impact. When the super-hydrophobicity of the coating surface is damaged, the layer-by-layer self-similar structure can be restored by simple rinsing and polishing.

[0066] The embodiment of the present invention prepares a super wear-resistant, strong alkali-resistant and impact-resistant super hydrophobic coating by adopting a layered structure that imitates shells and pearls, that is, the coating is brushed on by a vertical and horizontal method. Due to the properties and chemical reactions of the coating solution itself, the nanoparticle structure finally formed by solidification is also in a layer-by-layer self-assembled state, so that the wear resistance and super hydrophobicity of the coating after friction are also excellent.

[0067] Although the present invention has been described and illustrated with reference to specific embodiments of the present invention, these descriptions and illustrations do not limit the present invention. It will be clearly understood by those skilled in the art that various changes may be made without departing from the true spirit and scope of the present invention as defined by the appended claims, so that specific circumstances, materials, material compositions, materials, methods or processes are suitable for the goals, spirit and scope of the present application. All such modifications are intended to be within the scope of the appended claims. Although the methods disclosed herein have been described with reference to specific operations performed in a specific order, it should be understood that these operations may be combined, subdivided or reordered to form equivalent methods without departing from the teachings of the present invention. Therefore, unless specifically indicated herein, the order and grouping of operations are not limitations of the present application.

Claims

1. A method for preparing a novel super-hydrophobic coating that is super wear-resistant, alkali-resistant and impact-resistant, comprising: The super-hydrophobic coating solution is coated on the surface of the substrate, and then cured and annealed to obtain a novel super-hydrophobic coating that is super-wear-resistant, alkali-resistant and impact-resistant; The preparation method of the super hydrophobic coating solution comprises: The fluorine-modified epoxy resin-based material, the curing agent and the super-hydrophobic nanoparticle solution are mixed to obtain a super-hydrophobic coating solution.

2. The preparation method according to claim 1, characterized in that: The preparation method of the fluorine-modified epoxy resin-based material comprises: The epoxy resin-based substance, the silane coupling agent, the low surface energy substance and the solvent are mixed to obtain the fluorine-modified epoxy resin-based substance.

3. The preparation method according to claim 1, characterized in that: The preparation method of the super-hydrophobic nanoparticle solution comprises: The nanoparticle sol, nanoparticles, a silane coupling agent, a low surface energy substance and a dispersant are mixed to obtain a super-hydrophobic nanoparticle solution.

4. The preparation method according to claim 3, characterized in that: The preparation method of the nanoparticle sol comprises: The nanoparticles, nanoparticle precursor organic compounds, alkaline solution, water and organic reagents are mixed to obtain nanoparticle sol.

5. The preparation method according to claim 3 or 4, characterized in that: The nanoparticles are selected from one or more of silicon dioxide, titanium dioxide, tungsten oxide, zinc oxide, calcium carbonate, aluminum oxide, manganese dioxide, and polytetrafluoroethylene; The average particle size of the nanoparticles is 20 to 50 nm.

6. The preparation method according to claim 4, characterized in that: The nanoparticle precursor organic compound is selected from one or more of tetraethoxysilane, tetrabutyl titanate, zirconium n-butoxide, and zinc nitrate dihydrate.

7. The preparation method according to claim 2 or 3, characterized in that: The low surface energy substance is a fluorosilane low surface energy substance, selected from one or more of tridecafluorooctyltrimethoxysilane, heptadecafluorodecyltrimethoxysilane, n-octyltriethoxysilane, and propyltriacetoxysilane.

8. The preparation method according to claim 2, characterized in that: The epoxy resin-based material is selected from one or more of epoxy resin, polycarbonate-modified epoxy resin, acrylate-modified epoxy resin, polyurethane-modified epoxy resin, and silicone-modified epoxy resin.

9. The preparation method according to claim 1, characterized in that: The curing agent is selected from one or more of ethylenediamine, diethylenetriamine, polymethylenediamine, and diethylaminopropylamine.

10. The preparation method according to claim 1, characterized in that: The coating method is multi-layer coating, which is carried out in a horizontal and vertical alternating manner.