CN111363423A - Fluorine-containing coating material for outdoor protection of 5G communication base station and preparation method thereof - Google Patents

Fluorine-containing coating material for outdoor protection of 5G communication base station and preparation method thereof Download PDF

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CN111363423A
CN111363423A CN202010284482.3A CN202010284482A CN111363423A CN 111363423 A CN111363423 A CN 111363423A CN 202010284482 A CN202010284482 A CN 202010284482A CN 111363423 A CN111363423 A CN 111363423A
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material layer
fluorine
parts
containing coating
base station
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CN111363423B (en
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芮燕芳
于铎
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Wuxi Hengchuang Johnny Nano Material Technology Co ltd
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Wuxi Hengchuang Johnny Nano Material Technology Co ltd
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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
    • C09D127/00—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 a halogen; Coating compositions based on derivatives of such polymers
    • C09D127/02—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 a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
    • C09D127/12—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 a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
    • C09D127/16—Homopolymers or copolymers of vinylidene fluoride
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    • C09D127/00—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 a halogen; Coating compositions based on derivatives of such polymers
    • C09D127/02—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 a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
    • C09D127/12—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 a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
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    • C09D127/00—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 a halogen; Coating compositions based on derivatives of such polymers
    • C09D127/02—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 a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
    • C09D127/12—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 a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
    • C09D127/14—Homopolymers or copolymers of vinyl fluoride
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    • C09D127/00—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 a halogen; Coating compositions based on derivatives of such polymers
    • C09D127/02—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 a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
    • C09D127/12—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 a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
    • C09D127/18—Homopolymers or copolymers of tetrafluoroethene
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    • C09D129/00—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 an alcohol, ether, aldehydo, ketonic, acetal, or ketal radical; Coating compositions based on hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Coating compositions based on derivatives of such polymers
    • C09D129/14—Homopolymers or copolymers of acetals or ketals obtained by polymerisation of unsaturated acetals or ketals or by after-treatment of polymers of unsaturated alcohols
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    • C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
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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
    • C09D5/08—Anti-corrosive paints
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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
    • C09D5/32—Radiation-absorbing paints
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    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/60—Additives non-macromolecular
    • C09D7/61—Additives non-macromolecular inorganic
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    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/60—Additives non-macromolecular
    • C09D7/63—Additives non-macromolecular organic
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/02—Constructional details
    • H04Q1/11—Protection against environment
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    • C08K3/00—Use of inorganic substances as compounding ingredients
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    • C08K2003/0856—Iron
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    • C08L2205/00—Polymer mixtures characterised by other features
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    • C08L2312/00—Crosslinking

Abstract

The invention discloses a fluorine-containing coating material for outdoor protection of a 5G communication base station and a preparation method thereof, wherein the fluorine-containing coating material comprises a three-layer structure of a substrate material layer, a functional material layer and a maintenance material layer, wherein the substrate material layer is formed by mixing nanofiber dispersion liquid consisting of electrostatic spinning fibers and epoxy resin, the functional material layer mainly consists of fluorine-containing polymer coated wave-absorbing nanoparticles, and the fluorine-containing polymer coated wave-absorbing nanoparticles are further connected with the substrate material layer in a cross-linking manner through an open-loop catalyst, so that the excellent weather resistance and radiation resistance are improved, and the connection strength of a coating and a matrix is also greatly improved. The maintenance material layer mainly comprises a mixed solution of hydroxyapatite nano particles and polyvinyl butyral, has excellent corrosion resistance, flexibility and flexibility, can well protect the functional material layer, and prolongs the service life of the coating.

Description

Fluorine-containing coating material for outdoor protection of 5G communication base station and preparation method thereof
Technical Field
The invention belongs to the technical field of coating materials, and particularly relates to a fluorine-containing coating material for outdoor protection of a 5G communication base station and a preparation method thereof.
Background
With the development of science and technology and the continuous progress of industrial civilization, the living standard of people is gradually improved, the life also enters the information age, various electronic appliances and communication equipment are integrated into various fields of production and life, a wireless network covers almost all places, wireless signals used for the wireless communication equipment are provided by base station communication equipment which is usually established outdoors, and therefore a coating capable of protecting the shell of the base station communication equipment needs to be provided, so that the base station communication equipment has good weather resistance.
The Chinese patent with publication number CN105273582B in the prior art discloses a weather-resistant powder coating special for communication equipment, which comprises a composition A and a composition B, wherein the composition A comprises polyester resin, a curing agent, an accelerator, pigment and filler and an auxiliary agent, and the composition B comprises acrylate copolymer, polyester resin, a curing agent and pigment and filler. The prepared coating simply utilizes the characteristics of good weather resistance, good salt mist resistance, excellent adhesive force and the like of polyester resin, and can not meet the requirements of outdoor base station communication equipment shells on severe weather, particularly the adhesive force in the actual use process.
At present, the coverage radius of urban base stations is generally 200-500 meters, the smaller the coverage range is, the more base stations are in unit area, and in order to avoid electromagnetic interference among the base stations, it is necessary to add proper electromagnetic radiation resistant materials in the coating of the communication shell of the base stations, and the coating has important significance on the continuity and stability of communication signals.
Disclosure of Invention
Aiming at the technical problems, the invention provides a fluorine-containing coating material for outdoor protection of a 5G communication base station and a preparation method thereof.
The technical scheme of the invention is as follows: a fluorine-containing coating material for outdoor protection of a 5G communication base station comprises a substrate material layer, a functional material layer and a maintenance material layer which are sequentially attached to the outer surface of a matrix according to the inner-middle-outer mode;
the base material layer comprises the following components in parts by weight: 30-50 parts of epoxy resin, 10-15 parts of nano-fiber dispersion liquid and 15-30 parts of acetone;
the functional material layer comprises the following components in parts by weight: 50-60 parts of fluoropolymer, 35-45 parts of wave-absorbing nanoparticles, 10-12 parts of pigment auxiliary agent, 70-80 parts of oily solvent (ethyl orthosilicate), 50-60 parts of aqueous solvent (pure water), 3-5 parts of emulsifier (polyethylene glycol) and 4-6 parts of ring-opening catalyst;
the maintenance material layer comprises the following components in parts by weight: 37-43 parts of curing liquid and 3-5 parts of film forming agent.
Furthermore, the mass ratio of the base material layer, the functional material layer and the maintenance material layer is (2.0-2.2): (5.5-6.0): (1.0-1.2).
Further, the nanofiber dispersion comprises the following components in percentage by weight: 35-41% of fluorinated polyurethane electrostatic spinning fiber, 11-15% of nylon electrostatic spinning fiber and the balance of methanol.
The electrostatic spinning fiber has the advantages of large specific surface area, high porosity and good fiber uniformity, and has excellent interface effect, so that the substrate material layer has more active sites, and good connection between the matrix and the functional material is facilitated. The fluorinated polyurethane electrospun fiber has the functions of super-hydrophobicity and oxygen corrosion isolation, can be firmly connected with the functional material layer, has high mechanical strength, high specific tensile strength and excellent corrosion resistance and aging resistance, and can increase the connection strength of the substrate layer material layer, the matrix and the functional material layer.
Further, the fluorine-containing polymer comprises one or a combination of several of polytetrafluoroethylene, ethylene-chlorotrifluoroethylene copolymer, polyvinylidene fluoride, polychlorotrifluoroethylene, ethylene-vinyl fluoride copolymer and tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer.
Further, the wave-absorbing nanoparticles comprise carbon-coated iron nanoparticles with the average particle size of 10-20nm, carbon-coated nickel nanoparticles and carbon nano foam micro powder according to the mass ratio of 1:1: 2. The carbon-coated iron nanoparticles, the carbon-coated nickel nanoparticles and the carbon nano foam micro powder have good wave-absorbing characteristics, have the characteristics of low density and light weight, are easy to accumulate static electricity and are adsorbed on the surfaces of the carbon-coated iron nanoparticles and the carbon-coated nickel nanoparticles and other substances to form a film layer which is difficult to strip, and the wave-absorbing stability of the coating is improved.
Furthermore, the wave-absorbing nanoparticles are irradiated by femtosecond pulse laser with the pulse width of 120fs and the wavelength of 800nm, and the surface of the wave-absorbing nanoparticles is modified to improve the electromagnetic interference resistance of the wave-absorbing nanoparticles.
Further, the ring-opening catalyst is any one or a combination of triethylamine, m-phenylenediamine, N-diethylethanolamine, aminoimidazole, dimethylamino methylphenol and benzyl trimethyl ammonium chloride.
Further, the pigment auxiliary agent comprises the following components in percentage by weight: 0.5-1% of acrylic acid flatting agent, 0.5-1% of GPES type defoaming agent, 0.5-1% of dispersing agent AYD, 0.5-1% of 2-hydroxybenzophenone light aging inhibitor and the balance of coloring pigment. Wherein the coloring pigment is prepared by any one or more of conventional pigments sold in the market.
Further, the curing liquid comprises the following components in percentage by mass: 16-18% of hydroxyapatite nanoparticles, 20-24% of polyvinyl butyral, 1-3% of UV-531, 1-3% of antioxidant 264 and the balance of ethanol.
Adding the hydroxyapatite nanoparticles and polyvinyl butyral into the ethanol, stirring and dissolving, then adding the UV-531 and the antioxidant 264, mixing and stirring to obtain the maintenance liquid. The film layer formed by the hydroxyapatite and the polyvinyl butyral has excellent corrosion resistance, flexibility and flexibility, can well protect the functional material layer, and prolongs the service life of the coating.
Further, the preparation method of the fluorine-containing coating material comprises the following steps:
(1) preparing a base material layer: mixing the epoxy resin and acetone to obtain an epoxy resin solution, then adding the nanofiber dispersion into the epoxy resin solution, stirring the epoxy resin solution for 20-30min by a high shear homogenizer at 9000-;
(2) preparing a functional material layer: mixing the wave-absorbing nano particles, the aqueous solvent and the emulsifier to obtain a water phase; mixing the fluorine-containing polymer and the oily solvent to obtain an oil phase; gradually adding the water phase into the oil phase, and carrying out ultrasonic stirring while adding, wherein the ultrasonic frequency is 40-60kHz, and the stirring speed is 300-600r/min until the water phase is added, so as to obtain a suspension containing the fluorine-containing polymer coated wave-absorbing nanoparticles; adding the pigment auxiliary agent and the ring-opening catalyst into the suspension, and continuously stirring at the rotating speed of 2000-4000r/min for 40-60min to obtain a functional material solution;
(3) preparing a curing material layer: and adding the film forming agent into the curing liquid, and uniformly stirring to obtain a curing material solution.
Still further, the method of using the fluorine-containing coating material comprises the steps of:
s1: cleaning the surface of the substrate, and roughening the surface of the substrate by adopting a physical polishing or chemical corrosion method; the substrate may be made of aluminum, electronic components, ceramics, or the like.
S2: after the roughened surface of the matrix is dried, spraying the substrate material solution on the surface of the matrix, baking for 0.5-1.5h at the temperature of 80 ℃, and semi-fixing epoxy resin and nano-fibers on the surface of the matrix to obtain a substrate material layer;
s3: when the substrate material layer is naturally cooled to 40-45 ℃, uniformly spraying the functional material solution on the surface of the substrate material layer, after the solvent is volatilized to be dry, baking for 0.5-1.5h at the temperature of 80 ℃, promoting a fluorine-containing polymer terminal active group to perform a chemical crosslinking reaction with epoxy resin by using an open-loop catalyst, and fixing the fluorine-containing polymer coated wave-absorbing nanoparticles on the epoxy resin and the nanofibers on the substrate material layer to obtain the functional material layer;
s4: and uniformly spraying the maintenance material solution on the surface of the functional material layer, and drying at normal temperature to form a film, thereby obtaining a maintenance material layer for further protecting the functional material layer.
The invention has the beneficial effects that: the fluorine-containing coating comprises a three-layer structure of a base material layer, a functional material layer and a maintenance material layer, wherein the base material layer is formed by mixing nanofiber dispersion liquid consisting of electrostatic spinning fibers and epoxy resin, and the electrostatic spinning fibers have an excellent interface effect, so that the base material layer has more active sites, and good connection between a matrix and the functional material is favorably formed. The functional material layer is mainly composed of fluorine-containing polymer coated wave-absorbing nanoparticles, and is further connected with the substrate material layer through crosslinking through the ring-opening catalyst, so that the excellent weather resistance and radiation resistance are improved, and the connection strength of the coating and the substrate is also greatly improved. The maintenance material layer mainly comprises a mixed solution of hydroxyapatite nano particles and polyvinyl butyral, has excellent corrosion resistance, flexibility and flexibility, can well protect the functional material layer, and prolongs the service life of the coating.
Detailed Description
Example 1
The embodiment provides a fluorine-containing coating material for outdoor protection of a 5G communication base station, which is composed of a functional material layer, wherein the functional material layer comprises the following components in parts by weight: 50 parts of a fluorine-containing polymer (polyvinylidene fluoride), 35 parts of wave-absorbing nanoparticles, 10 parts of a pigment auxiliary agent, 70 parts of an oily solvent (tetraethoxysilane), 50 parts of a water solvent (pure water), 3 parts of an emulsifier (polyethylene glycol) and 4 parts of a ring-opening catalyst (triethylamine).
The wave-absorbing nanoparticles comprise carbon-coated iron nanoparticles with the average particle size of 10nm, carbon-coated nickel nanoparticles and carbon nano foam micro powder according to the mass ratio of 1:1: 2. The carbon-coated iron nanoparticles, the carbon-coated nickel nanoparticles and the carbon nano foam micro powder have good wave-absorbing characteristics, have the characteristics of low density and light weight, are easy to accumulate static electricity and are adsorbed on the surfaces of the carbon-coated iron nanoparticles and the carbon-coated nickel nanoparticles and other substances to form a film layer which is difficult to strip, and the wave-absorbing stability of the coating is improved.
The pigment auxiliary agent comprises the following components in percentage by weight: 0.5 percent of acrylic acid flatting agent, 0.5 percent of GPES type defoaming agent, 0.5 percent of dispersant AYD, 0.5 percent of 2-hydroxybenzophenone light aging inhibitor and the balance of coloring pigment. Wherein the coloring pigment is prepared by any one or more of conventional pigments sold in the market.
The preparation method and the use method of the fluorine-containing coating material of the embodiment are as follows:
(1) preparing a functional material layer: mixing the wave-absorbing nano particles, the aqueous solvent and the emulsifier to obtain a water phase; mixing the fluorine-containing polymer and the oily solvent to obtain an oil phase; gradually adding the water phase into the oil phase, and carrying out ultrasonic stirring while adding, wherein the ultrasonic frequency is 40kHz, and the stirring speed is 300r/min until the water phase is added, so as to obtain a suspension containing the fluorine-containing polymer coated wave-absorbing nanoparticles; and adding the pigment auxiliary agent and the ring-opening catalyst into the suspension, and continuously stirring at the rotating speed of 2000r/min for 40min to obtain a functional material solution, namely the fluorine-containing coating material.
(2) The using method comprises the following steps: cleaning the surface of the substrate, roughening the surface of the substrate by adopting a physical polishing or chemical corrosion method, uniformly spraying the functional material solution on the roughened surface of the substrate, volatilizing the solvent, and baking at the temperature of 80 ℃ for 0.5h to obtain a functional material layer, thus finally obtaining the fluorine-containing coating A.
Example 2
The embodiment provides a fluorine-containing coating material for outdoor protection of a 5G communication base station, which is composed of a base material layer and a functional material layer, wherein the base material layer comprises the following components in parts by weight: 50 parts of epoxy resin, 15 parts of nanofiber dispersion liquid and 30 parts of acetone; the nano-fiber dispersion comprises the following components in percentage by weight: 41 percent of fluorinated polyurethane electrostatic spinning fiber, 15 percent of nylon electrostatic spinning fiber and the balance of methanol. The electrostatic spinning fiber has the advantages of large specific surface area, high porosity and good fiber uniformity, and has excellent interface effect, so that the substrate material layer has more active sites, and good connection between the matrix and the functional material is facilitated. The fluorinated polyurethane electrospun fiber has the functions of super-hydrophobicity and oxygen corrosion isolation, can be firmly connected with the functional material layer, has high mechanical strength, high specific tensile strength and excellent corrosion resistance and aging resistance, and can increase the connection strength of the substrate layer material layer, the matrix and the functional material layer.
The functional material layer comprises the following components in parts by weight: 60 parts of a fluorine-containing polymer (polytetrafluoroethylene), 45 parts of wave-absorbing nanoparticles, 12 parts of a pigment auxiliary agent, 80 parts of an oily solvent (tetraethoxysilane), 60 parts of a water-based solvent (pure water), 5 parts of an emulsifier (polyethylene glycol) and 6 parts of a ring-opening catalyst (m-phenylenediamine); the wave-absorbing nanoparticles comprise carbon-coated iron nanoparticles with the average particle size of 20nm, carbon-coated nickel nanoparticles and carbon nano foam micro powder according to the mass ratio of 1:1: 2. The pigment auxiliary agent comprises the following components in percentage by weight: 1 percent of acrylic acid flatting agent, 1 percent of GPES defoaming agent, 1 percent of dispersant AYD, 1 percent of 2-hydroxybenzophenone light aging inhibitor and the balance of coloring pigment. Wherein the coloring pigment is prepared by any one or more of conventional pigments sold in the market.
The preparation method and the use method of the fluorine-containing coating material of the embodiment are as follows:
(1) preparing a base material layer: mixing the epoxy resin and acetone to obtain an epoxy resin solution, then adding the nanofiber dispersion liquid into the epoxy resin solution, stirring the epoxy resin solution for 30min at 12000r/min through a high-shear homogenizer, and fully mixing the nanofiber dispersion liquid and the epoxy resin solution to obtain a substrate material solution;
(2) preparing a functional material layer: mixing the wave-absorbing nano particles, the aqueous solvent and the emulsifier to obtain a water phase; mixing the fluorine-containing polymer and the oily solvent to obtain an oil phase; gradually adding the water phase into the oil phase, and carrying out ultrasonic stirring while adding, wherein the ultrasonic frequency is 60kHz, and the stirring speed is 600r/min until the water phase is added, so as to obtain a suspension containing the fluorine-containing polymer coated wave-absorbing nanoparticles; adding the pigment auxiliary agent and the ring-opening catalyst into the suspension, and continuously stirring at the rotating speed of 4000r/min for 60min to obtain a functional material solution;
(3) the using method comprises the following steps: cleaning the surface of a matrix, roughening the surface of the matrix by adopting a physical polishing or chemical corrosion method, after the roughened surface of the matrix is dried, spraying the substrate material solution on the surface of the matrix, baking for 1.5h at the temperature of 80 ℃, and semi-fixing epoxy resin and nano-fibers on the surface of the matrix to obtain a substrate material layer; and when the substrate material layer is naturally cooled to 40-45 ℃, uniformly spraying the functional material solution on the surface of the substrate material layer, after the solvent is volatilized to be dry, baking for 1.5h at the temperature of 80 ℃, promoting a fluorine-containing polymer terminal active group to perform a chemical crosslinking reaction with epoxy resin by using a ring-opening catalyst, fixing the fluorine-containing polymer coated wave-absorbing nanoparticles on the epoxy resin and the nanofibers on the substrate material layer to obtain a functional material layer, and finally obtaining the fluorine-containing coating B.
Example 3
The embodiment provides a fluorine-containing coating material for outdoor protection of a 5G communication base station, which is composed of a functional material layer and a maintenance material layer, wherein the functional material layer comprises the following components in parts by weight: 53 parts of fluorine-containing polymer (polychlorotrifluoroethylene), 38 parts of wave-absorbing nanoparticles, 11 parts of pigment auxiliary agent, 74 oily solvent (tetraethoxysilane), 53 parts of aqueous solvent (pure water), 4 parts of emulsifier (polyethylene glycol) and 5 parts of ring-opening catalyst (N, N-diethylethanolamine); the wave-absorbing nanoparticles comprise carbon-coated iron nanoparticles with the average particle size of 12nm, carbon-coated nickel nanoparticles and carbon nano foam micro powder according to the mass ratio of 1:1: 2. The pigment auxiliary agent comprises the following components in percentage by weight: 0.8 percent of acrylic acid flatting agent, 0.8 percent of GPES type defoaming agent, 0.8 percent of dispersant AYD, 0.8 percent of 2-hydroxybenzophenone light aging inhibitor and the balance of coloring pigment. Wherein the coloring pigment is prepared by any one or more of conventional pigments sold in the market.
The maintenance material layer comprises the following components in parts by weight: 39 parts of curing liquid and 4 parts of film forming agent. The maintenance liquid comprises the following components in percentage by mass: 17% of hydroxyapatite nanoparticles, 21% of polyvinyl butyral, 2% of UV-531, 1.5% of antioxidant 264 and the balance of ethanol. Adding the hydroxyapatite nanoparticles and polyvinyl butyral into the ethanol, stirring and dissolving, then adding the UV-531 and the antioxidant 264, mixing and stirring to obtain the maintenance liquid. The film layer formed by the hydroxyapatite and the polyvinyl butyral has excellent corrosion resistance, flexibility and flexibility, can well protect the functional material layer, and prolongs the service life of the coating.
The preparation method and the use method of the fluorine-containing coating material of the embodiment are as follows:
(1) preparing a functional material layer: mixing the wave-absorbing nano particles, the aqueous solvent and the emulsifier to obtain a water phase; mixing the fluorine-containing polymer and the oily solvent to obtain an oil phase; gradually adding the water phase into the oil phase, and carrying out ultrasonic stirring while adding, wherein the ultrasonic frequency is 45kHz, and the stirring speed is 350r/min until the water phase is added, so as to obtain a suspension containing the fluorine-containing polymer coated wave-absorbing nanoparticles; and adding the pigment auxiliary agent and the ring-opening catalyst into the suspension, and continuously stirring at the rotating speed of 3500r/min for 43min to obtain a functional material solution.
(2) Preparing a curing material layer: and adding the film forming agent into the curing liquid, and uniformly stirring to obtain a curing material solution.
(3) The using method comprises the following steps: cleaning the surface of a matrix, roughening the surface of the matrix by adopting a physical polishing or chemical corrosion method, uniformly spraying the functional material solution on the surface of the matrix after roughening after drying the surface of the matrix after roughening, drying the solvent at 80 ℃ for 1.2 hours to obtain a functional material layer, uniformly spraying the maintenance material solution on the surface of the functional material layer, drying the functional material layer at normal temperature to form a film, and further protecting the functional material layer to obtain a maintenance material layer, thus finally obtaining the fluorine-containing coating C.
Example 4
The embodiment provides a fluorine-containing coating material for outdoor protection of a 5G communication base station, which comprises a substrate material layer, a functional material layer and a maintenance material layer, wherein the substrate material layer, the functional material layer and the maintenance material layer are sequentially attached to the outer surface of a base body according to the inner-middle-outer mode;
the base material layer comprises the following components in parts by weight: 40 parts of epoxy resin, 12 parts of nanofiber dispersion liquid and 17 parts of acetone; the nano-fiber dispersion comprises the following components in percentage by weight: 38% of fluorinated polyurethane electrostatic spinning fiber, 13% of nylon electrostatic spinning fiber and the balance of methanol.
The functional material layer comprises the following components in parts by weight: 55 parts of a fluorine-containing polymer (ethylene-vinyl fluoride copolymer), 40 parts of wave-absorbing nanoparticles, 11 parts of a pigment auxiliary agent, 75 parts of an oily solvent (tetraethoxysilane), 55 parts of a water-based solvent (pure water), 4 parts of an emulsifier (polyethylene glycol) and 5 parts of a ring-opening catalyst (aminoimidazole); the wave-absorbing nanoparticles comprise carbon-coated iron nanoparticles with the average particle size of 15nm, carbon-coated nickel nanoparticles and carbon nano foam micro powder according to the mass ratio of 1:1: 2. The pigment auxiliary agent comprises the following components in percentage by weight: 0.7 percent of acrylic acid flatting agent, 0.7 percent of GPES type defoaming agent, 0.7 percent of dispersant AYD, 0.7 percent of 2-hydroxybenzophenone light aging inhibitor and the balance of coloring pigment. Wherein the coloring pigment is prepared by any one or more of conventional pigments sold in the market.
The preparation method and the use method of the fluorine-containing coating material of the embodiment are as follows:
(1) preparing a base material layer: mixing the epoxy resin and acetone to obtain an epoxy resin solution, then adding the nanofiber dispersion liquid into the epoxy resin solution, stirring the epoxy resin solution for 25min at 11000r/min through a high-shear homogenizer, and fully mixing the nanofiber dispersion liquid with the epoxy resin solution to obtain a substrate material solution;
(2) preparing a functional material layer: mixing the wave-absorbing nano particles, the aqueous solvent and the emulsifier to obtain a water phase; mixing the fluorine-containing polymer and the oily solvent to obtain an oil phase; gradually adding the water phase into the oil phase, and carrying out ultrasonic stirring while adding, wherein the ultrasonic frequency is 50kHz, and the stirring speed is 450r/min, until the water phase is added, so as to obtain a suspension containing the fluorine-containing polymer coated wave-absorbing nanoparticles; adding the pigment auxiliary agent and the ring-opening catalyst into the suspension, and continuously stirring for 50min at the rotating speed of 3000r/min to obtain a functional material solution;
(3) preparing a curing material layer: and adding the film forming agent into the curing liquid, and uniformly stirring to obtain a curing material solution.
(4) The using method comprises the following steps: cleaning the surface of a matrix, roughening the surface of the matrix by adopting a physical polishing or chemical corrosion method, after the roughened surface of the matrix is dried, spraying the substrate material solution on the surface of the matrix, baking for 1h at the temperature of 80 ℃, and semi-fixing epoxy resin and nano-fibers on the surface of the matrix to obtain a substrate material layer; when the substrate material layer is naturally cooled to 40-45 ℃, uniformly spraying the functional material solution on the surface of the substrate material layer, after the solvent is volatilized to be dry, baking for 1h at the temperature of 80 ℃, promoting a fluorine-containing polymer terminal active group to perform a chemical crosslinking reaction with epoxy resin by using an open-loop catalyst, and fixing the fluorine-containing polymer coated wave-absorbing nanoparticles on the epoxy resin and the nanofibers on the substrate material layer to obtain the functional material layer; and uniformly spraying the maintenance material solution on the surface of the functional material layer, drying at normal temperature to form a film, and further protecting the functional material layer to obtain a maintenance material layer, thus finally obtaining the fluorine-containing coating D. Wherein the spraying mass ratio of the base material layer, the functional material layer and the maintenance material layer is 2.1:5.7:1.1
Example 5
This example is substantially the same as example 4, and comprises a base material layer, a functional material layer and a curing material layer sequentially attached to the outer surface of the base body in an inner-middle-outer manner; the difference is that the wave-absorbing nanoparticles in the functional material layer of the embodiment are irradiated by femtosecond pulse laser with a pulse width of 120fs and a wavelength of 800nm before being added, and the surface of the wave-absorbing nanoparticles is modified to improve the wave-absorbing and anti-electromagnetic interference properties. The preparation method and the use method of the fluorine-containing coating material of the embodiment are the same as those of the embodiment 4, and finally the fluorine-containing coating E is obtained.
The physical properties of the fluorine-containing coatings A to E obtained in examples 1 to 5 of the present invention are shown in Table 1:
TABLE 1 physical Property test results for fluorine-containing coatings A-E
Figure BDA0002447944330000101
And (4) conclusion: from Table 1, it can be seen that the physical properties of the coatings are compared together to obtain a fluorine coating E > fluorine coating D > fluorine coating C > fluorine coating B > fluorine coating A, and the fluorine coating E prepared by the method of example 5 according to the present invention has the best physical properties.

Claims (10)

1. A fluorine-containing coating material for outdoor protection of a 5G communication base station is characterized by comprising a substrate material layer, a functional material layer and a maintenance material layer which are sequentially attached to the outer surface of a matrix according to the inner-middle-outer mode;
the base material layer comprises the following components in parts by weight: 30-50 parts of epoxy resin, 10-15 parts of nano-fiber dispersion liquid and 15-30 parts of acetone;
the functional material layer comprises the following components in parts by weight: 50-60 parts of fluoropolymer, 35-45 parts of wave-absorbing nanoparticles, 10-12 parts of pigment auxiliary agent, 70-80 parts of oily solvent (ethyl orthosilicate), 50-60 parts of aqueous solvent (pure water), 3-5 parts of emulsifier (polyethylene glycol) and 4-6 parts of ring-opening catalyst;
the maintenance material layer comprises the following components in parts by weight: 37-43 parts of curing liquid and 3-5 parts of film forming agent.
2. The fluorine-containing coating material for outdoor protection of a 5G communication base station as claimed in claim 1, wherein the mass ratio of the base material layer, the functional material layer and the curing material layer is (2.0-2.2): (5.5-6.0): (1.0-1.2).
3. The fluorine-containing coating material for outdoor protection of a 5G communication base station as claimed in claim 1, wherein the nanofiber dispersion comprises the following components in percentage by weight: 35-41% of fluorinated polyurethane electrostatic spinning fiber, 11-15% of nylon electrostatic spinning fiber and the balance of methanol.
4. The fluorine-containing coating material for outdoor protection of a 5G communication base station as claimed in claim 1, wherein the fluorine-containing polymer comprises one or more of polytetrafluoroethylene, ethylene-chlorotrifluoroethylene copolymer, polyvinylidene fluoride, polychlorotrifluoroethylene, ethylene-vinyl fluoride copolymer, and tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer.
5. The fluorine-containing coating material for outdoor protection of the 5G communication base station as claimed in claim 1, wherein the wave-absorbing nanoparticles comprise carbon-coated iron nanoparticles, carbon-coated nickel nanoparticles and carbon nano foam micro powder with an average particle size of 10-20nm in a mass ratio of 1:1: 2.
6. The fluorine-containing coating material for outdoor protection of a 5G communication base station as claimed in claim 1, wherein the ring-opening catalyst is any one or a combination of triethylamine, m-phenylenediamine, N-diethylethanolamine, aminoimidazole, dimethylaminomethylphenol, benzyltrimethylammonium chloride.
7. The fluorine-containing coating material for outdoor protection of a 5G communication base station as claimed in claim 1, wherein the pigment auxiliary comprises in weight percent: 0.5-1% of acrylic acid flatting agent, 0.5-1% of GPES type defoaming agent, 0.5-1% of dispersing agent AYD, 0.5-1% of 2-hydroxybenzophenone light aging inhibitor and the balance of coloring pigment.
8. The fluorine-containing coating material for outdoor protection of a 5G communication base station as claimed in claim 1, wherein the curing liquid comprises, by mass: 16-18% of hydroxyapatite nanoparticles, 20-24% of polyvinyl butyral, 1-3% of UV-531, 1-3% of antioxidant 264 and the balance of ethanol.
9. The fluorine-containing coating material for outdoor protection of the 5G communication base station as claimed in claim 1, wherein the preparation method of the fluorine-containing coating material comprises the following steps:
(1) preparing a base material layer: mixing the epoxy resin and acetone to obtain an epoxy resin solution, then adding the nanofiber dispersion into the epoxy resin solution, stirring the epoxy resin solution for 20-30min by a high shear homogenizer at 9000-;
(2) preparing a functional material layer: mixing the wave-absorbing nano particles, the aqueous solvent and the emulsifier to obtain a water phase; mixing the fluorine-containing polymer and the oily solvent to obtain an oil phase; gradually adding the water phase into the oil phase, and carrying out ultrasonic stirring while adding, wherein the ultrasonic frequency is 40-60kHz, and the stirring speed is 300-600r/min until the water phase is added, so as to obtain a suspension containing the fluorine-containing polymer coated wave-absorbing nanoparticles; adding the pigment auxiliary agent and the ring-opening catalyst into the suspension, and continuously stirring at the rotating speed of 2000-4000r/min for 40-60min to obtain a functional material solution;
(3) preparing a curing material layer: and adding the film forming agent into the curing liquid, and uniformly stirring to obtain a curing material solution.
10. The fluorine-containing coating material for outdoor protection of 5G communication base stations as claimed in claim 9, wherein the use method of the fluorine-containing coating material comprises the following steps:
s1: cleaning the surface of the substrate, and roughening the surface of the substrate by adopting a physical polishing or chemical corrosion method;
s2: after the roughened surface of the matrix is dried, spraying the substrate material solution on the surface of the matrix, baking for 0.5-1.5h at the temperature of 80 ℃, and semi-fixing epoxy resin and nano-fibers on the surface of the matrix to obtain a substrate material layer;
s3: when the substrate material layer is naturally cooled to 40-45 ℃, uniformly spraying the functional material solution on the surface of the substrate material layer, after the solvent is volatilized to be dry, baking for 0.5-1.5h at the temperature of 80 ℃, promoting a fluorine-containing polymer terminal active group to perform a chemical crosslinking reaction with epoxy resin by using an open-loop catalyst, and fixing the fluorine-containing polymer coated wave-absorbing nanoparticles on the epoxy resin and the nanofibers on the substrate material layer to obtain the functional material layer;
s4: and uniformly spraying the maintenance material solution on the surface of the functional material layer, and drying at normal temperature to form a film, thereby obtaining a maintenance material layer for further protecting the functional material layer.
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