CN109021757B - Self-cleaning coating, preparation method thereof and self-cleaning wall decoration - Google Patents
Self-cleaning coating, preparation method thereof and self-cleaning wall decoration Download PDFInfo
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
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- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/16—Antifouling paints; Underwater paints
- C09D5/1656—Antifouling paints; Underwater paints characterised by the film-forming substance
- C09D5/1662—Synthetic film-forming substance
- C09D5/1668—Vinyl-type polymers
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- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/16—Antifouling paints; Underwater paints
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Abstract
The invention provides a self-cleaning coating, a preparation method thereof and a self-cleaning wall decoration, wherein the coating comprises the raw material with R' CH2OOCRC＝CH220-40 parts of acrylate with a general formula, wherein R is selected from H or C1-C5 alkyl, and R' is selected from H or C1-C14 alkyl; having a structure of CnF(2n+1)(CH2)mOOCHC＝CH230-150 parts of acrylic acid fluoroalkanate with a general formula; 10-30 parts of vinyl ether; 10-40 parts of perfluorododecanethiol; 0.02-0.05 part of an initiator; 30-70 parts of composite filler; 2-20 parts of camphorwood micro powder; 5-20 parts of an auxiliary agent and 500 parts of a solvent. The self-cleaning coating has stronger hydrophobicity; the self-cleaning wall decoration has good self-cleaning property, easy decontamination property and wear resistance, and the dust attached to the surface of an object is taken away by the wet cleaning cloth after being lightly wiped by the cleaning cloth, so that the wall decoration is very convenient to clean, and the surface of the wall decoration is not easily covered by graffiti or sewage.
Description
Technical Field
The invention belongs to the technical field of coatings, and particularly relates to a self-cleaning coating, a preparation method thereof and a self-cleaning wall decoration.
Background
Common wall ornaments include wall paper, wall cloth, wall painting and other ornaments. The wallpaper or wall cloth is an indoor wall surface decoration material which is prepared by using paper or cloth as a base material, using polyvinyl chloride resin or other fiber materials as a surface layer, and performing calendering or coating, printing, embossing or foaming. The decorative board has the characteristics of rich colors, various pattern changes, various textures, noble and elegant decorative effect, high construction efficiency and the like, and is widely applied to home and engineering decoration.
In the ornament category, because the wallpaper or the wall cloth is not protected by glass or organic glass, the wallpaper or the wall cloth is difficult to be attacked by pollutants in the using process, the wallpaper or the wall cloth is easy to mildew and discolor due to the attachment of the pollutants, and the appearance of the ornament is influenced, so that the antifouling and self-cleaning performance is increasingly required by consumers for the wallpaper or the wall cloth. Antifouling self-cleaning properties require that the wallpaper or wallcovering be hydrophobic, which allows the wallpaper or wallcovering to be cleaned using a tool such as a rag, while preventing the penetration of contaminants into the wallpaper or wallcovering.
Disclosure of Invention
In view of the above, the invention aims to provide a self-cleaning coating, a preparation method thereof and a self-cleaning wall decoration, wherein the coating has stronger hydrophobicity.
The invention provides a self-cleaning coating which comprises the following raw materials in parts by weight:
20-40 parts of acrylate, 30-150 parts of acrylic acid fluoroalkanoate, 10-30 parts of vinyl ether, 10-40 parts of perfluorododecyl mercaptan, 0.02-0.05 part of an initiator, 30-70 parts of a composite filler, 2-20 parts of camphorwood micropowder, 5-20 parts of an auxiliary agent and 500 parts of a solvent;
the acrylate has the general formula of ① R' CH2OOCRC＝CH2(ii) a R is selected from H or C1-C5 alkyl; r' is selected from H or C1-C14 alkyl;
the acrylic acid fluoroalkanoate has the general formula of formula ② CnF(2n+1)(CH2)mOOCHC＝CH2(ii) a Wherein m is more than or equal to 1 and less than or equal to 10, and n is more than or equal to 4 and less than or equal to 14.
Preferably, the acrylate is selected from one or more of methyl methacrylate, isobutyl methacrylate, n-butyl methacrylate and n-butyl acrylate;
the acrylic acid fluoroalkanoate is selected from C4F9(CH2)2OOCHC＝CH2、C6F13CH2OOCHC＝CH2、C8F17(CH2)10OOCHC＝CH2、C10F21(CH2)3OOCHC＝CH2And C14F29(CH2)2OOCHC＝CH2One or more of (a).
Preferably, the vinyl ether is selected from one or more of perfluoro-n-propyl vinyl ether, perfluoromethyl vinyl ether, and glycol butyl vinyl ether.
Preferably, the composite filler is a mixture of fumed silica, bamboo charcoal powder, alumina, transparent powder and tridecafluorooctyltriethoxysilane.
Preferably, the adjuvant is selected from one or more of a thickener, a leveling agent, a surfactant and a diluent.
Preferably, the initiator is selected from one or more of azobisisobutyronitrile, benzoyl peroxide and lauroyl peroxide.
The invention provides a preparation method of the self-cleaning coating in the technical scheme, which comprises the following steps:
s1, dissolving acrylic ester in a partial solvent, adding 30-60 wt.% of composite filler, and uniformly dispersing to obtain a first slurry, wherein the acrylic ester has a general formula ①, R' CH2OOCRC＝CH2(ii) a R is selected from H or C1-C5 alkyl; r' is selected from H or C1-C14 alkyl;
s2, dissolving acrylic acid fluoroalkanate in the rest solvent, adding 40-70 wt.% of composite filler, and uniformly dispersing to obtain a second slurry, wherein the acrylic acid fluoroalkanate has a general formula ②, and CnF(2n+1)(CH2)mOOCHC＝CH2(ii) a Wherein m is more than or equal to 1 and less than or equal to 10, and n is more than or equal to 4 and less than or equal to 14;
s3: and mixing the first slurry and the second slurry, adding vinyl ether, an initiator and perfluorododecanethiol, reacting at 50-90 ℃, adding an auxiliary agent and camphorwood micro powder, and dispersing uniformly to obtain the self-cleaning coating.
The invention provides a self-cleaning wall decoration, which comprises a base material and a self-cleaning coating coated on the base material; the base material is selected from finished wallpaper, semi-finished wall cloth or finished wall cloth;
the self-cleaning coating is prepared by coating the self-cleaning coating in the technical scheme or the self-cleaning coating prepared by the preparation method in the technical scheme.
Preferably, the thickness of the self-cleaning coating is 80-200 μm.
The invention provides a self-cleaning coatingThe medium acrylic ester, the acrylic acid fluoroalkanate and the vinyl ether are copolymerized under the action of an initiator to form a compact coating film, and the coating film contains-CF3The groups are arranged in a regular hexagonal close packing manner, so that the surface free energy of a coating film is reduced, and the self-cleaning coating has stronger hydrophobicity. The self-cleaning wall decoration has good self-cleaning property, easy decontamination property and wear resistance. The dust adhered to the surface of an object is taken away by the wet rag after being lightly wiped by the rag, so that the cleaning is very convenient, and the surface of the object is not easily covered by graffiti or sewage. The experimental results show that: when the self-cleaning coating is used for preparing a coating with the thickness of 100 mu m, the contact angle is 153-171 degrees; the scratch hardness of the pencil is 2H; color fastness to rubbing: dry wiping and wet wiping are both 5 grades; the test color difference in the soil release performance test is 5 grades; the rolling angle in the self-cleaning test is 6-8 degrees.
Detailed Description
The invention provides a self-cleaning coating which comprises the following raw materials in parts by weight:
20-40 parts of acrylate, 30-150 parts of acrylic acid fluoroalkanoate, 10-30 parts of vinyl ether, 10-40 parts of perfluorododecyl mercaptan, 0.02-0.05 part of an initiator, 30-70 parts of a composite filler, 2-20 parts of camphorwood micropowder, 5-20 parts of an auxiliary agent and 500 parts of a solvent;
the acrylate has the general formula of ① R' CH2OOCRC＝CH2(ii) a R is selected from H or C1-C5 alkyl; r' is selected from H or C1-C14 alkyl;
the acrylic acid fluoroalkanoate has the general formula of formula ② CnF(2n+1)(CH2)mOOCHC＝CH2(ii) a Wherein m is more than or equal to 1 and less than or equal to 10, and n is more than or equal to 4 and less than or equal to 14.
The self-cleaning coating provided by the invention has the advantages that acrylic ester, acrylic acid fluoroalkanoate and vinyl ether are copolymerized under the action of an initiator to form a compact coating, and the coating contains-CF3The groups are arranged in a regular hexagonal close packing manner, so that the surface free energy of a coating film is reduced, and the self-cleaning coating has stronger hydrophobicity. The coating formed by the coating takes away pollutants through the rolling of water drops on the surface of the coating, so that the aim of self-cleaning is fulfilled; also has better easy decontamination and abrasion resistance.
The raw materials of the self-cleaning coating provided by the invention comprise 20-40 parts of acrylic ester, preferably 22-38 parts of acrylic ester, wherein the acrylic ester has a general formula of ① R' CH2OOCRC＝CH2(ii) a R is selected from H or C1-C5 alkyl; r' is selected from H or C1-C14 alkyl; the acrylate is preferably one or more of methyl methacrylate, isobutyl methacrylate, n-butyl methacrylate and n-butyl acrylate. In a specific embodiment of the invention, the acrylate is specifically n-butyl methacrylate; or methyl methacrylate; or a mixture of isobutyl methacrylate and n-butyl acrylate.
The raw material of the self-cleaning coating comprises 30-150 parts of acrylic acid fluoroalkanate, preferably 35-140 parts of the acrylic acid fluoroalkanate, wherein the acrylic acid fluoroalkanate has a general formula of ② CnF(2n+1)(CH2)mOOCHC＝CH2(ii) a Wherein m is more than or equal to 1 and less than or equal to 10, and n is more than or equal to 4 and less than or equal to 14; the acrylic acid fluoroalkanoate is preferably C4F9(CH2)2OOCHC＝CH2、C6F13CH2OOCHC＝CH2、C8F17(CH2)10OOCHC＝CH2、C10F21(CH2)3OOCHC＝CH2And C14F29(CH2)2OOCHC＝CH2One or more of (a). In a specific embodiment of the present invention, the acrylic acid fluoroalkanate is specifically perfluorotetradecyl butyl acrylate, perfluorooctyl butyl acrylate or perfluorobutyl ethyl acrylate. In the present invention, among the acrylic acid fluoroalkanates, -CF3The group can reduce the surface free energy of the coating when forming a coating film. If the surface energy of the coating film is lower than that of the contaminants, it is difficult for the contaminants to stably adhere to the surface of the coating film.
The raw materials of the self-cleaning coating provided by the invention comprise 10-30 parts of vinyl ether, and preferably 12-28 parts. The vinyl ether is preferably one or more of perfluoro-n-propyl vinyl ether, perfluoromethyl vinyl ether, and glycol butyl vinyl ether.
The raw materials of the self-cleaning coating provided by the invention comprise 0.02-0.05 part of initiator. The initiator is preferably one or more of azobisisobutyronitrile, benzoyl peroxide and lauroyl peroxide. In the invention, the acrylate, the acrylic acid fluoroalkanate and the vinyl ether are copolymerized in the presence of the initiator to form a compact film, so that a coating formed by the coating has excellent hydrophobicity.
The raw materials of the self-cleaning coating provided by the invention comprise 30-70 parts of composite filler, and preferably 33-68 parts. The composite filler is preferably a mixture of fumed silica, bamboo charcoal powder, alumina, transparent powder and tridecafluorooctyltriethoxysilane. The mass ratio of the fumed silica, the bamboo charcoal powder, the alumina, the transparent powder and the tridecafluorooctyltriethoxysilane in the composite filler is preferably 5-25: 2-10: 3-10: 5-10: 10-30.
The raw materials of the self-cleaning coating provided by the invention comprise 2-20 parts of camphorwood micro powder. The camphorwood is natural in insect expelling, and has the effects of insect prevention, moth prevention, moisture prevention, mold prevention and air purification. The presence of the camphorwood micro powder and the composite filler enables the coating to have better mechanical property and friction resistance.
The raw materials of the self-cleaning coating provided by the invention comprise 5-20 parts of an auxiliary agent. The auxiliary agent is preferably one or more of a thickener, a leveling agent, a surfactant and a diluent. In the invention, the thickener is a rheological additive in essence, can adjust the rheological property, thicken the coating, prevent the filler from precipitating, endow good physical and mechanical stability, control the rheological property of the construction process (no sagging, no dripping and no liquid flying during the sizing), and also can reduce the cost; the thickener is preferably hydroxyethyl cellulose and/or propylene glycol alginate. The leveling agent can promote the coating to form a flat, smooth and uniform coating film in the drying film-forming process. The surface tension of the coating can be effectively reduced, and the leveling property and uniformity of the coating are improved; the leveling agent is preferably an organic silicon leveling agent and/or a polyacrylic leveling agent. The thinner can adjust the viscosity of the coating during coating, and the construction is more convenient and easier; the diluent is preferably methanol and/or butyl acetate.
The raw materials of the self-cleaning coating provided by the invention comprise 500 parts of solvent. The solvent is preferably one or more of methyl ethyl ketone, acetone, isophorone, ethyl acetate, tetrahydrofuran, N-dimethylformamide, chloroform, toluene, and xylene, and more preferably one or more of toluene, methyl ethyl ketone, and N, N-dimethylformamide.
The invention provides a preparation method of the self-cleaning coating in the technical scheme, which comprises the following steps:
s1, dissolving acrylic ester in a partial solvent, adding 30-60 wt.% of composite filler, and uniformly dispersing to obtain a first slurry, wherein the acrylic ester has a general formula ①, R' CH2OOCRC＝CH2(ii) a R is selected from H or C1-C5 alkyl; r' is selected from H or C1-C14 alkyl; in the embodiment of the invention, the mass ratio of the acrylate to the partial solvent is preferably 1: 3-1: 7.
S2, dissolving acrylic acid fluoroalkanate in the rest solvent, adding 40-70 wt.% of composite filler, and uniformly dispersing to obtain a second slurry, wherein the acrylic acid fluoroalkanate has a general formula ②, and CnF(2n+1)(CH2)mOOCHC＝CH2(ii) a Wherein m is more than or equal to 1 and less than or equal to 10, and n is more than or equal to 4 and less than or equal to 14; in the embodiment of the invention, the mass ratio of the acrylic acid fluoroalkane value to the rest of the solvent is preferably 1: 3-1: 7.
S3: and mixing the first slurry and the second slurry, adding vinyl ether, an initiator and perfluorododecanethiol, reacting at 50-90 ℃, adding an auxiliary agent and camphorwood micro powder, and dispersing uniformly to obtain the self-cleaning coating.
The invention provides a self-cleaning wall decoration, which comprises a base material and a self-cleaning coating coated on the base material; the base material is selected from finished wallpaper, semi-finished wall cloth or finished wall cloth;
the self-cleaning coating is prepared by coating the self-cleaning coating in the technical scheme.
In the present invention, the thickness of the self-cleaning coating is preferably above 80 μm; more preferably 80 to 200 μm.
The invention has the advantages that the surface of the substrate is coated with the coating, so that the substrate has extremely strong hydrophobic and waterproof effects and surface antisticking property, and the dust attached to the surface of an object is taken away by the wet rag when the substrate is lightly wiped by the rag, so that the substrate is very convenient to clean; the surface of the paint is not easily covered by graffiti or sewage. The self-cleaning wall decoration takes away pollutants through the movement of water drops on the surface of a coating film, so that the self-cleaning purpose is achieved.
The self-cleaning principle of the invention is as follows: on the surface of the super-sulfur water coating, the contact area of the water drops and the surface of the super-sulfur water coating accounts for 2-3% of the total area, and a large amount of air is retained between the water drops and the surface of the super-sulfur water coating. The pollutant particles are always larger than the microstructure size of the surface of the ultra-sulfur water coating, and only contact with the top end of the ultra-sulfur water coating microstructure, so that the actual contact area is very small. Because the adhesive force between the cleaning cloth and the surface of the super-sulfur water coating is far less than the adhesive force between the cleaning cloth and water drops, when the wet cleaning cloth is smeared on the coating, the pollution particles on the super-sulfur water coating can be captured by the moving water drops and taken away by the cleaning cloth, thereby achieving the self-cleaning effect.
In order to further illustrate the present invention, the following examples are given to describe in detail a self-cleaning coating, a method for preparing the same and a self-cleaning wall decoration, which should not be construed as limiting the scope of the present invention.
The self-cleaning coating prepared by the method is uniformly coated on the surface of the wallpaper, the coating is dried to form a film, the thickness of the coating is 100 mu m, and the wallpaper after film formation is subjected to performance tests of hydrophobicity, pencil scratch hardness, friction color fastness, easy decontamination and self-cleaning property.
Wherein, the hydrophobicity test adopts an SL200D contact angle tester to test the wettability to water; the pencil scratch hardness test is carried out according to the GB/T6739-96 standard; the rubbing fastness test is carried out according to the QB/T4034-2010 standard; the soil release test was tested according to FZ/T01118-; the self-cleaning performance test method comprises the following steps: the wallpaper is adhered to the surface of a smooth glass plate, carbon powder is uniformly spread on the wallpaper, then 0.5mL of water drops are dripped by a sample injector, the glass plate is inclined at a certain angle, the water drops begin to flow in a precursor mode, the carbon black is taken away, the inclination angle is recorded, and the smaller the rolling angle is, the better the self-cleaning property of the self-cleaning coating is.
Example 1
The preparation of the self-cleaning coating comprises the following steps:
(1) dissolving 22 parts by weight of n-butyl methacrylate in 154 parts by weight of toluene, adding 40 parts by weight of composite filler, and uniformly dispersing to obtain first slurry for later use; the composite filler is a mixture of fumed silica, bamboo charcoal powder, alumina, transparent powder and tridecafluorooctyl triethoxy silicon in a mass ratio of 10:3:4:8: 15;
(2) dissolving 115 parts by weight of perfluorobutyl ethyl acrylate in 346 parts by weight of toluene, adding 30 parts by weight of the composite filler, and uniformly dispersing to obtain a second slurry for later use;
(3) and mixing the first slurry and the second slurry, adding 15 parts by weight of perfluoro-n-propyl vinyl ether, 0.025 parts by weight of initiator azobisisobutyronitrile and 25 parts by weight of perfluoro-dodecyl mercaptan, reacting for 16 hours at 88 ℃, finally adding 3 parts by weight of hydroxyethyl cellulose thickener, 6 parts by weight of organic silicon flatting agent, 2 parts by weight of methanol diluent and 10 parts by weight of camphorwood micro powder, and uniformly dispersing to obtain the self-cleaning coating.
The self-cleaning coating prepared in example 1 was tested according to the above technical scheme for performance test, and the results are shown in table 1.
Example 2
The preparation of the self-cleaning coating comprises the following steps:
(1) dissolving 37 parts by weight of methyl methacrylate in 111 parts by weight of methyl ethyl ketone, wherein the weight ratio of methyl methacrylate to methyl ethyl ketone is 1:3, adding 15 parts by weight of composite filler, and uniformly dispersing to obtain first slurry for later use; the composite filler is a mixture of fumed silica, bamboo charcoal powder, alumina, transparent powder and tridecafluorooctyl triethoxy silicon in a mass ratio of 20:7:9:5: 28;
(2) dissolving 57 parts by weight of perfluorooctyl butyl acrylate in 389 parts by weight of methyl ethyl ketone, adding 35 parts by weight of the composite filler, and uniformly dispersing to obtain a second slurry for later use;
(3) and mixing the first slurry and the second slurry, adding 28 parts by weight of perfluoromethyl vinyl ether, 0.05 part by weight of benzoyl peroxide and 38 parts by weight of perfluorododecyl mercaptan, reacting at 60 ℃ for 20 hours, finally adding 6 parts by weight of thickening agent propylene glycol alginate, 3 parts by weight of polyacrylic acid leveling agent, 1 part by weight of diluent butyl acetate and 18 parts by weight of camphorwood micro powder, and uniformly dispersing to obtain the self-cleaning coating.
The self-cleaning coating prepared in example 2 was tested according to the above technical scheme for performance test, and the results are shown in table 1.
Example 3
The preparation of the self-cleaning coating comprises the following steps:
(1) dissolving 14 parts by weight of isobutyl methacrylate and 21 parts by weight of N-butyl acrylate in 175 parts by weight of N, N-dimethylformamide, adding 19 parts by weight of composite filler, and uniformly dispersing to obtain first slurry for later use; the composite filler is a mixture of fumed silica, bamboo charcoal powder, alumina, transparent powder and tridecafluorooctyl triethoxy silicon in a mass ratio of 25:9.5:6:10: 20;
(2) dissolving 65 parts by weight of perfluorotetradecyl butyl acrylate in 325 parts by weight of N, N-dimethylformamide, adding 15 parts by weight of the composite filler, and uniformly dispersing to obtain a second slurry for later use;
(3) and (2) mixing the first slurry and the second slurry, adding 20 parts by weight of ethylene glycol butyl vinyl ether, 0.04 part by weight of lauroyl peroxide and 15 parts by weight of perfluorododecyl mercaptan, reacting at 70 ℃ for 18 hours, finally adding 3 parts by weight of hydroxyethyl cellulose, 2 parts by weight of an organic silicon flatting agent, 0.5 part by weight of butyl acetate and 5 parts by weight of camphorwood micro powder, and uniformly dispersing to obtain the self-cleaning coating.
The self-cleaning coating prepared in example 3 was tested according to the above technical scheme for performance test, and the results are shown in table 1.
TABLE 1 Performance test results of self-cleaning wallpaper prepared from self-cleaning coatings prepared in examples 1-3 of the present invention
The experimental results of the above examples show that: when the self-cleaning coating is used for preparing a coating with the thickness of 100 mu m, the contact angle is 153-171 degrees; the scratch hardness of the pencil is 2H; color fastness to rubbing: dry wiping and wet wiping are both 5 grades; the test color difference in the soil release performance test is 5 grades; the rolling angle in the self-cleaning test is 6-8 degrees. Therefore, the self-cleaning wallpaper has good self-cleaning performance, easy decontamination performance and wear resistance.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (8)
1. The self-cleaning coating comprises the following raw materials in parts by weight:
20-40 parts of acrylate, 30-150 parts of acrylic acid fluoroalkanoate, 10-30 parts of vinyl ether, 10-40 parts of perfluorododecyl mercaptan, 0.02-0.05 part of an initiator, 30-70 parts of a composite filler, 2-20 parts of camphorwood micropowder, 5-20 parts of an auxiliary agent and 500 parts of a solvent;
the acrylate has the general formula of ① R' CH2OOCRC=CH2(ii) a R is selected from H or C1-C5 alkyl; r' is selected from H or C1-C14 alkyl;
the acrylic acid fluoroalkanoate has the general formula of formula ② CnF(2n+1)(CH2)mOOCHC=CH2(ii) a Wherein m is more than or equal to 1 and less than or equal to 10, and n is more than or equal to 4 and less than or equal to 14;
the vinyl ether is selected from one or more of perfluoro-n-propyl vinyl ether, perfluoromethyl vinyl ether and ethylene glycol butyl vinyl ether.
2. The self-cleaning coating of claim 1, wherein the acrylate is selected from one or more of methyl methacrylate, isobutyl methacrylate, n-butyl methacrylate, and n-butyl acrylate;
the acrylic acid fluoroalkanoate is selected from C4F9(CH2)2OOCHC=CH2、C6F13CH2OOCHC=CH2、C8F17(CH2)10OOCHC=CH2、C10F21(CH2)3OOCHC=CH2And C14F29(CH2)2OOCHC=CH2One or more of (a).
3. The self-cleaning coating of claim 1, wherein the composite filler is a mixture of fumed silica, bamboo charcoal powder, alumina, clear powder, and tridecafluorooctyltriethoxysilane.
4. The self-cleaning coating of claim 1, wherein the auxiliary agent is selected from one or more of a thickener, a leveling agent, and a diluent.
5. The self-cleaning coating of claim 1, wherein the initiator is selected from one or more of azobisisobutyronitrile, benzoyl peroxide, and lauroyl peroxide.
6. A method for preparing the self-cleaning coating of any one of claims 1 to 5, comprising the steps of:
s1, dissolving acrylic ester in a partial solvent, adding 30-60 wt.% of composite filler, and uniformly dispersing to obtain a first slurry, wherein the acrylic ester has a general formula ①, R' CH2OOCRC=CH2(ii) a R is selected from H or C1-C5 alkyl; r' is selected from H or C1-C14 alkyl;
s2, dissolving acrylic acid fluoroalkanate in the rest solvent, adding 40-70 wt.% of composite filler, and uniformly dispersing to obtain a second slurry, wherein the acrylic acid fluoroalkanate has a general formula ②, and CnF(2n+1)(CH2)mOOCHC = CH2(ii) a Wherein m is more than or equal to 1 and less than or equal to 10, and n is more than or equal to 4 and less than or equal to 14;
s3: and mixing the first slurry and the second slurry, adding vinyl ether, an initiator and perfluorododecanethiol, reacting at 50-90 ℃, adding an auxiliary agent and camphorwood micro powder, and dispersing uniformly to obtain the self-cleaning coating.
7. A self-cleaning wall decoration comprising a substrate and a self-cleaning coating coated on the substrate; the base material is selected from finished wallpaper, semi-finished wall cloth or finished wall cloth;
the self-cleaning coating is prepared by coating the self-cleaning coating as described in any one of claims 1-5 or the self-cleaning coating prepared by the preparation method as described in claim 6.
8. A self-cleaning wall decoration item as claimed in claim 7, wherein the thickness of the self-cleaning coating is 80-200 μm.
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