Preparation method of renewable low-cost plant-based super-amphiphobic coating

Abstract

The invention provides a preparation method of a renewable low-cost plant-based super-amphiphobic coating, which comprises the following steps: (1) preparing plant particles: selecting plants, drying, activating at 150-2000 DEG C, and sieving to obtain 1-150m plant particles; (2) preparing a plant-based super-amphiphobic coating, namely adding plant particles into an alcoholic solution A, mixing with a fluorine-containing silane monomer and a fluorine-free silane monomer, and stirring at room temperature to obtain a plant-based super-amphiphobic particle suspension, in which the particle size of the plant-based super-amphiphobic particles is 1-150m; and drying at room temperature-100 DEG C to obtain the plant-based super-amphiphobic coating. The plant-based super-amphiphobic coating is prominent on the surface of a base material, and has the advantages of color, environmental protection, simple preparation, low cost, wide application range and capability of realizing large-area coating.

Description

Technical Field

[0001] The invention relates to the technical field of powder coatings, and in particular to a method for preparing a renewable, low-cost plant-based super-amphiphobic coating. Background Art

[0002] Super-amphiphobic coating is a special coating whose static contact angle (CA) remains greater than 150° and sliding angle (SA) is less than 10° when in contact with water or some liquids with low surface tension. Because it has better self-cleaning ability than super-hydrophobic materials, it has broader application prospects in medical and health care, self-cleaning coatings, antifreeze coatings and other industries.

[0003] At present, there have been studies on the preparation of double-hydrophobic coatings and certain results have been achieved. Patent CN117801585A discloses the use of graphene oxide as a substrate for preparing super double-hydrophobic coatings. By combining graphene with silicon dioxide and fluorinated silane to form super double-hydrophobic particles, although this method improves the salt spray resistance of the coating, the cost of graphene is high, the preparation method is complicated, and it is difficult to promote it on a large scale in industry; Patent CN116179044A discloses the use of specific mineral resources such as titanium dioxide, silicon dioxide, diatomaceous earth, and attapulgite as a matrix, and modifying them to prepare super double-hydrophobic micro-nano particles, generating a powder coating with certain double-hydrophobic properties. This method improves the wear resistance of the self-cleaning coating, but this method requires a specific substrate, which makes this method not universal; Patent CN113248776B first prepares a silicon dioxide dispersion, and then generates a double-hydrophobic fluorine-silicon material on this basis to prepare a waterproof and oil-proof breathable film with super double-hydrophobic function. Although this method improves the liquid-repellent performance of the coating, the preparation process is cumbersome and complicated.

[0004] Although the current preparation method can prepare liquid-repellent materials with certain properties, the selection and construction process of the substrate generally have problems such as high preparation cost, complex process, and non-renewable substrate, which is not conducive to large-scale promotion in industry and the long-term development of double-repellent coatings. Therefore, the development of low-cost, renewable super-double-repellent coatings has important application value. Summary of the invention

[0005] In view of this, the present invention provides a method for preparing a renewable, low-cost plant-based super-amphiphobic coating, including preparing plant particles and preparing a plant-based super-amphiphobic coating. In the preparation method, plant particles are prepared using different plants as raw materials, and then the plant-based super-amphiphobic coating is prepared, which has the advantages of being green, low-carbon, environmentally friendly, and easy to obtain.

[0006] The technical solution of the present invention is as follows: A method for preparing a renewable, low-cost plant-based super-amphiphobic coating, the process is as follows: (1) Preparation of plant microparticles Plant particles: Select plants, dry them, activate them at 150-2000℃, and sieve them to obtain plant particles of 1-150µm; (2) Preparation of plant-based super-amphiphobic coatings Add the plant particles prepared in step (1) to the alcohol solution A, mix with the fluorine-containing silane monomer and the fluorine-free silane monomer, and stir at room temperature to obtain a plant-based super-amphiphobic particle suspension, in which the particle size of the plant-based super-amphiphobic particles is 1-150 µm; The plant-based super-amphiphobic coating is obtained by drying at room temperature-100°C.

[0007] The super-amphiphobic coating obtained by the present invention adopts plants as the substrate. Compared with the super-amphiphobic coating constructed by the method using graphene oxide, attapulgite, titanium dioxide and other substrates, it has the advantages of being green and pollution-free, and is more in line with green, environmentally friendly and sustainable production requirements.

[0008] Preferably, in step (1), the plant is one or more of bamboo leaves, trees, mugwort, corn stalks, and wheat stalks; the drying temperature is room temperature-90°C; and the particle size of the obtained plant particles is 1-70µm.

[0009] Preferably, in step (2), the alcohol solution A is one or a combination of methanol, ethanol, isopropanol; The fluorine-containing silane monomer is one or a combination of two or more of perfluorosilyltrimethoxysilane, perfluorodecyltriethoxysilane and perfluorooctyltriethoxysilane; The fluorine-free silane monomer is one or a combination of two or more of ethyl silicate, ethyltrimethoxysilane, methyltrimethoxysilane, tetraethyl silicate and sodium silicate.

[0010] Preferably, in step (2), the stirring time at room temperature is 0.5-48 hours.

[0011] When the plant-based super-amphiphobic coating is used, the surface of the substrate is first cleaned, and then one or more layers of resin are applied by dipping, spin coating, spraying or brushing; Then, the plant-based super-amphiphobic coating is mixed with the alcohol solution B to obtain a suspension; the suspension is applied to the surface of the resin layer by dipping, spin coating, spraying or brushing; Then, the super-amphiphobic coating (plant-based composite layer) with super-amphiphobic function is obtained by baking and curing at a temperature of 50-120°C for 5-60 minutes.

[0012] Preferably, the substrate includes but is not limited to cloth, steel, silicon, and glass; the super-amphiphobic coating can construct a super-amphiphobic coating on the surface of the substrate. Compared with the super-amphiphobic surface constructed by methods such as laser etching and microfluidic droplet template method, the preparation difficulty and cost are greatly reduced, and it is more conducive to large-scale production in industry.

[0013] The super-amphiphobic coating formed by the super-amphiphobic coating of the present invention can effectively reduce the contact between the substrate and the external environment (dust, water, oil, etc.), thereby effectively saving the cost of maintenance resources such as manpower and material resources; at the same time, the super-amphiphobic coating protects the substrate from corrosion and extends the service life of the substrate.

[0014] Preferably, the resin is one of epoxy resin and polyester resin or a combination of the two; before coating, the resin is diluted with a diluent before use.

[0015] Preferably, the diluent is one or a combination of two or more of esters, alcohols or ketones.

[0016] Preferably, the alcohol is one or a combination of methanol and ethanol; the ester is ethyl acetate; the ketone is acetone; and the volume ratio of the resin to the diluent is 1:0-100.

[0017] Preferably, the mass ratio of the plant-based super amphiphobic coating to the alcohol solution B is 1:100-1000.

[0018] Preferably, the alcohol solution B is methanol or ethanol.

[0019] The plant-based super-amphiphobic coating prepared by the present invention has waterproof and oil-proof performance; in the method, the plant matrix is ​​first activated, and then the activated plant substrate is reacted with organosilanes and fluorinated silanes to prepare a plant-based super-amphiphobic coating. The plant-based super-amphiphobic coating is applied on the resin layer to obtain a soil layer with super-amphiphobic performance. The coating prepared by the present invention has the advantages of being green, environmentally friendly, simple to prepare, low-cost, wide in application, and can achieve large-area coating.

[0020] Compared with the prior art, the beneficial effects of the present invention are: 1. In the present invention, different plants can be used as raw materials to prepare plant particles, and then plant-based super-amphiphobic coatings can be prepared, which has the advantages of being green, low-carbon, environmentally friendly, and easy to obtain; 2. The plant-based super-amphiphobic coating of the present invention is simple and efficient to prepare, does not require additional process treatment, and the obtained super-amphiphobic coating particles can adjust the coating thickness by spraying, spin coating, and dipping time; 3. The coating formed by the super-amphiphobic coating of the present invention has excellent super-amphiphobic effect, is simple to operate, has low preparation cost, is suitable for industrial large-scale production and promotion, and has significant economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 This is an optical photograph of the mugwort super-amphiphobic coating formed by spraying the mugwort super-amphiphobic coating prepared in Example 1 on a glass sheet.

[0023] Figure 2 This is a FESEM image of the particles in the mugwort-based super-amphiphobic coating in step (2) of Example 1.

[0024] Figure 3 : This is the water contact angle of the mugwort-based super-amphiphobic coating of Example 1.

[0025] Figure 4 : This is the oil contact angle of the mugwort-based super-amphiphobic coating of Example 1.

[0026] Figure 5 These are optical photographs of the mugwort-based super-amphiphobic coating of Example 1 in contact with water, oil, and milk droplets. In the figure, the droplets from left to right are: red ink, peanut oil, and milk droplets.

[0027] Figure 6 The mugwort-based super-amphiphobic coating of Example 1 simulates the self-cleaning effect of dust coverage and rain erosion.

[0028] Figure 7 This is a diagram showing the liquid-repellent effect of the pure fluorosilicone nanoparticle coating of Comparative Example 1.

[0029] Figure 8 This is the FESEM image of the corn straw super-amphiphobic particles in Example 4.

[0030] Fig. 9 This is a diagram showing the hydrophobic and oleophobic effects of the MCC substrate coating after the plant fiber is not activated in Comparative Example 2.

[0031] Fig.10 These are optical photographs of the mugwort-based super-amphiphobic coating of Example 1 constructed on the surfaces of different substrates in Example 6. In the figure, from left to right are nylon cloth, single crystal silicon, and stainless steel. DETAILED DESCRIPTION

[0032] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0033] Example 1 A method for preparing a renewable, low-cost wormwood-based super-amphiphobic coating, the process is as follows: (1) Preparation of Artemisia argyi microparticles Selecting mugwort, drying it at room temperature, activating it at 800° C. for 1 hour, and sieving it to obtain mugwort particles with a particle size of less than 4 μm; (2) Preparation of mugwort-based super-amphiphobic coating Alcohol solution A: 10 mL of ethanol and 2 mL of ammonia water, mixed and obtained; Weigh 0.02 g of mugwort microparticles and mix with alcohol solution A to obtain a slurry; The slurry was stirred, and 0.5 mL of tetraethyl orthosilicate (TEOS) and 1 mL of perfluorodecyltriethoxysilane (PFDTES) were added dropwise to the slurry respectively under stirring; After the dripping is completed, the reaction is continued for 24 hours under magnetic stirring to obtain a suspension of wormwood-based super-amphiphobic particles; The FESEM image of the mugwort-based superamphiphobic particles in the suspension is shown in Figure 2 ; Combine Figure 2 It can be seen that in this suspension, the particle size of the mugwort-based super-amphiphobic particles is less than 70 μm; Drying at 60°C for 60 min yields the mugwort-based super-amphiphobic coating; The above-mentioned mugwort-based super-amphiphobic coating is used as follows: s1, brushing a mixture of epoxy resin (Hunan Brothers New Materials Co., Ltd., DY-E6012) and curing agent (Hunan Brothers New Materials Co., Ltd., DY-E6012) on the glass surface, with the volume ratio of epoxy resin to curing agent being 1:1, to form an epoxy resin layer on the glass surface; s2, mixing the mugwort-based super-amphiphobic coating prepared in step (2) with ethanol, wherein the weight ratio of the mugwort-based super-amphiphobic coating to ethanol (alcohol solution B) is 1:1000; and applying the mixture to the surface of the epoxy resin layer by spraying with a spray gun at a pressure of 0.3 MPa; s3, after coating, drying and curing at a temperature of 50° C. for 7 min, thus obtaining a mugwort-based super-amphiphobic coating having super-amphiphobic function; The optical photo of the mugwort-based super-amphiphobic coating is shown in Figure 1 , water contact angle Figure 3 , oil contact angle Figure 4 , self-cleaning effect Figure 5 ; Combination Figure 3 and Figure 4 It can be seen that the mugwort-based super-amphiphobic coating prepared by the present invention has a super-amphiphobic effect.

[0034] Comparative Example 1 A pure fluorine silicon nanoparticle coating, the preparation method is as follows: 10 mL of ethanol and 2 mL of ammonia water were mixed, and 1 mL of tetraethyl orthosilicate (TEOS) and 2 mL of perfluorodecyltriethoxysilane (PFDTES) were added dropwise in sequence; After the dripping is completed, the reaction is continued for 24 hours under magnetic stirring to obtain the coating; The method of using the above coating is as follows: s1, brushing a mixture of epoxy resin (Hunan Brothers New Materials Co., Ltd., DY-E6012) and curing agent (Hunan Brothers New Materials Co., Ltd., DY-E6012) on the glass surface, with the volume ratio of epoxy resin to curing agent being 1:1, to form an epoxy resin layer on the glass surface; s2, mixing the coating and ethanol in a weight ratio of 1:1000, and applying the mixture to the surface of the epoxy resin layer by spraying with a spray gun at a pressure of 0.3 MPa; s3, after coating, the coating is dried and cured at a temperature of 50°C to obtain a coating; The coating prepared in this comparative example does not have a super-amphiphobic self-cleaning effect.

[0035] Example 2 A method for preparing a renewable, low-cost wormwood-based super-amphiphobic coating, the process is as follows: (1) Preparation of Artemisia argyi microparticles Selecting mugwort, drying it at 50°C, activating it at 800°C for 1 hour, and sieving it to obtain mugwort particles with a particle size of less than 150 μm; (2) Preparation of mugwort-based super-amphiphobic coating Alcohol solution A: 40 mL of ethanol and 10 mL of ammonia water, mixed and obtained; Weigh 2 g of mugwort microparticles and mix with alcohol solution A to obtain a slurry; The slurry was stirred, and 1 mL of tetraethyl orthosilicate (TEOS) and 2 mL of perfluorodecyltriethoxysilane (PFDTES) were added dropwise to the slurry in sequence under stirring; After the dripping is completed, the reaction is continued for 24 hours under magnetic stirring to obtain a suspension of wormwood-based super-amphiphobic particles; Then, the mixture was dried at 60°C for 60 min to obtain the mugwort-based super-amphiphobic coating; The above-mentioned mugwort-based super-amphiphobic coating is used as follows: s1, brushing a mixture of epoxy resin (Hunan Brothers New Materials Co., Ltd., DY-E6012), curing agent (Hunan Brothers New Materials Co., Ltd., DY-E6012), and ethanol on the glass surface, wherein the volume ratio of epoxy resin, curing agent, and ethanol (diluent) is 1:1:10, to form an epoxy resin layer on the glass surface; s2, mixing the mugwort-based super-amphiphobic particles prepared in step (2) with ethanol, wherein the weight ratio of the mugwort-based super-amphiphobic particles to the ethanol is 1:200; and applying the mixture to the surface of the epoxy resin layer by spraying with a spray gun at a pressure of 0.3 MPa; s3, after coating, dry and cure at 60°C for 60 minutes to obtain a mugwort-based super-amphiphobic coating with super-amphiphobic function.

[0036] Example 3 A method for preparing a renewable, low-cost bamboo leaf-based super-amphiphobic coating, the process is as follows: (1) Preparation of bamboo leaf microparticles Select bamboo leaves, dry them at room temperature, activate them at 1000°C for 1 hour, and sieve them to obtain bamboo leaf microparticle matrix with a particle size of less than 2 μm; (2) Preparation of bamboo leaf-based super-amphiphobic coating Alcohol solution A: 10 mL of ethanol and 2 mL of ammonia water, mixed and obtained; Weigh 0.02 g of bamboo leaf microparticle matrix and mix it with alcohol solution A to obtain a slurry; The slurry was stirred, and 1 mL of tetraethyl orthosilicate (TEOS) and 2 mL of perfluorodecyltriethoxysilane (PFDTES) were added dropwise to the slurry in sequence under stirring; After the dripping was completed, the reaction was continued for 24 hours under magnetic stirring to obtain a bamboo leaf-based super-amphiphobic particle suspension; After drying at 70°C for 30 min, a bamboo leaf-based super-amphiphobic coating was obtained; The above-mentioned bamboo leaf-based super-amphiphobic coating is used as follows: s1, brushing a mixture of epoxy resin (Hunan Brothers New Materials Co., Ltd., DY-E6012), curing agent (Hunan Brothers New Materials Co., Ltd., DY-E6012), and ethanol on the glass surface, wherein the volume ratio of epoxy resin, curing agent, and ethanol is 1:1:10, to form an epoxy resin layer on the glass surface; s2, mixing the bamboo leaf-based super-amphiphobic particles prepared in step (2) with methanol, wherein the weight ratio of the bamboo leaf-based super-amphiphobic particles to methanol is 1:500; and applying the mixture to the surface of the epoxy resin layer by spraying with a spray gun, wherein the pressure of the spray gun is 0.3 MPa; s3, after coating, drying and curing at a temperature of 60°C for 60 minutes to obtain a bamboo leaf-based super-amphiphobic coating with super-amphiphobic function.

[0037] Example 4 A method for preparing a renewable, low-cost corn straw-based super-amphiphobic coating, the process is as follows: (1) Preparation of corn straw microparticles Corn straw was selected, dried at 80°C, activated at 1000°C for 1 hour, and sieved to obtain a corn straw microparticle matrix with a particle size of less than 70 μm; (2) Preparation of corn straw-based super-amphiphobic coating Alcohol solution A: 40 mL of ethanol and 10 mL of ammonia water, mixed and obtained; Weigh 1.0 g of corn stalk microparticle matrix and mix it with alcohol solution A to obtain a slurry; The slurry was stirred, and 1 mL of tetraethyl orthosilicate (TEOS) and 2 mL of perfluorodecyltriethoxysilane (PFDTES) were added dropwise to the slurry in sequence under stirring; After the dripping was completed, the reaction was continued for 24 hours under magnetic stirring to obtain a corn stalk-based super-amphiphobic particle suspension; In the corn straw-based super-amphiphobic particle suspension, the FESEM image of the particles is shown in Figure 8 ; Combine Figure 8 It can be seen that the particle size of the corn straw-based superamphiphobic particles is less than 70 μm; Then, the mixture was dried at 60°C for 60 min to obtain a corn straw-based super-amphiphobic coating. The corn straw-based super-amphiphobic coating is used as follows: s1, brushing a mixture of epoxy resin (Hunan Brothers New Materials Co., Ltd., DY-E6012), curing agent (Hunan Brothers New Materials Co., Ltd., DY-E6012), and methanol on the glass surface, wherein the volume ratio of epoxy resin, curing agent, and methanol is 1:1:10, to form an epoxy resin layer on the glass surface; s2, mixing the corn straw-based super-amphiphobic particles prepared in step (2) with ethanol, wherein the weight ratio of the corn straw-based super-amphiphobic particles to ethanol is 1:100; and applying the mixture to the surface of the epoxy resin layer by spraying with a spray gun at a pressure of 0.3 MPa; s3, after coating, drying and curing at a temperature of 50°C for 30 minutes to obtain a corn straw-based super-amphiphobic coating with super-amphiphobic function.

[0038] Comparative Example 2 The difference from Example 4 is that cellulose MCC (particle size of 5µm-15µm) that is only reduced in size but not activated is used to replace the activated corn straw fiber. The specific preparation method is as follows: (1) Weigh 1 g of MCC, mix it with 10 mL of ethanol and 2 mL of ammonia water, stir it for 5 min, add 1 mL of tetraethyl orthosilicate (TEOS) and 2 mL of perfluorodecyltriethoxysilane (PFDTES) dropwise, and continue to react under magnetic stirring for 24 h to obtain a starch-based microparticle suspension; (2) brushing a mixture of epoxy resin (DY-E6012, Hunan Brothers New Materials Co., Ltd.), curing agent (DY-E6012, Hunan Brothers New Materials Co., Ltd.), and methanol on the glass surface, wherein the volume ratio of epoxy resin, curing agent, and methanol is 1:1:10, to form an epoxy resin layer on the glass surface; The MCC-based particle suspension is applied to the surface of the epoxy resin layer by spraying with a spray gun at a pressure of 0.3 MPa; After coating, the coating was dried and cured at 50° C. for 60 min to obtain an MCC coating.

[0039] The MCC coating prepared in this comparative example only has super hydrophobicity but not super oleophobicity. Fig. 9 .

[0040] Example 5 A method for preparing a renewable, low-cost reed-based super-amphiphobic coating, the process is as follows: (1) Preparation of reed microparticles Reeds were selected, dried at 50°C, activated at 800°C for 1 hour, and sieved to obtain reed particles with a particle size of less than 150 μm; (2) Preparation of reed-based super-amphiphobic coating Alcohol solution A: 40 mL of ethanol and 10 mL of ammonia water, mixed and obtained; Weigh 2 g of reed particles and mix with alcohol solution A to obtain a slurry; The slurry was stirred, and 1 mL of tetraethyl orthosilicate (TEOS) and 2 mL of perfluorodecyltriethoxysilane (PFDTES) were added dropwise to the slurry in sequence under stirring; After the dripping is completed, the reaction is continued for 24 hours under magnetic stirring to obtain a reed-based super-amphiphobic particle suspension; Then, the reed-based super-amphiphobic coating was obtained by drying at 60°C for 60 min. The above-mentioned reed-based super-amphiphobic coating is used in the same manner as in Example 2, thereby obtaining a reed-based super-amphiphobic coating having super-amphiphobic function.

[0041] Example 6 Using the method of using the mugwort-based super-amphiphobic coating of Example 1, super-amphiphobic coatings were constructed on substrates of nylon cloth, single crystal silicon and stainless steel, respectively. The results are shown in FIG. Fig.10 .

[0042] Although the present invention has been described in detail by reference to the preferred embodiments, the present invention is not limited thereto. Without departing from the spirit and essence of the present invention, a person of ordinary skill in the art may make various equivalent modifications or substitutions to the embodiments of the present invention, and these modifications or substitutions shall be within the scope of the present invention. Any person of ordinary skill in the art may easily think of changes or substitutions within the technical scope disclosed by the present invention, and these shall be within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be subject to the scope of protection of the claims.

Claims

1. A method for preparing a renewable, low-cost plant-based super-amphiphobic coating, characterized in that: The process is as follows: (1) Preparation of plant microparticles Plant particles: Select plants, dry them, activate them at 150-2000℃, and sieve them to obtain plant particles of 1-150µm; (2) Preparation of plant-based super-amphiphobic coatings Add the plant particles prepared in step (1) to the alcohol solution A, mix with the fluorine-containing silane monomer and the fluorine-free silane monomer, and stir at room temperature to obtain a plant-based super-amphiphobic particle suspension, in which the particle size of the plant-based super-amphiphobic particles is 1-150 µm; The plant-based super-amphiphobic coating is obtained by drying at room temperature-100°C.

2. The method for preparing a renewable, low-cost plant-based super-amphiphobic coating according to claim 1, wherein: In step (1), the plant is one or more of bamboo leaves, trees, mugwort, corn stalks, and wheat stalks; the drying temperature is room temperature-90° C.; and the particle size of the obtained plant particles is 1-70 µm.

3. The preparation method of the renewable, low-cost plant-based super-amphiphobic coating as claimed in claim 1, characterized in that, In step (2), the alcohol solution A is one or a combination of methanol, ethanol, and isopropanol; The fluorine-containing silane monomer is one or a combination of two or more of perfluorosilyltrimethoxysilane, perfluorodecyltriethoxysilane and perfluorooctyltriethoxysilane; The fluorine-free silane monomer is one or a combination of two or more of ethyl silicate, ethyltrimethoxysilane, methyltrimethoxysilane, tetraethyl silicate and sodium silicate.

4. The method for preparing a renewable, low-cost plant-based super-amphiphobic coating as claimed in claim 1, characterized in that: In step (2), the stirring time at room temperature is 0.5-48 hours.

5. The method for using the plant-based super-amphiphobic coating prepared by the preparation method of the plant-based super-amphiphobic coating as claimed in claim 1, characterized in that, The process is as follows: The substrate surface is first cleaned, and then one or more layers of resin are applied by dipping, spin coating, spraying or brushing; Then, the plant-based super-amphiphobic coating is mixed with the alcohol solution B to obtain a suspension; the suspension is applied to the surface of the resin layer by dipping, spin coating, spraying or brushing; Then, the super-amphiphobic coating is obtained by baking and curing at a temperature of 50-120° C. for 5-60 minutes.

6. The method for using the plant-based super-amphiphobic coating according to claim 5, characterized in that: The substrate includes but is not limited to cloth, steel, silicon, and glass.

7. The method for using the plant-based super-amphiphobic coating according to claim 5, characterized in that: The resin is one of epoxy resin and polyester resin or a combination of the two; before coating, the resin is diluted with a diluent before use.

8. The method for using the plant-based super-amphiphobic coating according to claim 7, characterized in that: The diluent is one or a combination of two or more of esters, alcohols or ketones.

9. The method for using the plant-based super-amphiphobic coating according to claim 8, characterized in that: The alcohol is one or a combination of methanol and ethanol; the ester is ethyl acetate; the ketone is acetone; and the volume ratio of the resin to the diluent is 1:0-100.

10. The method for using the plant-based super-amphiphobic coating according to claim 5, characterized in that: The mass ratio of the plant-based super-amphiphobic coating to the alcohol solution B is 1:100-1000.

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