CN111876005A - Anti-corrosion photovoltaic cable coating and preparation method thereof - Google Patents
Anti-corrosion photovoltaic cable coating and preparation method thereof Download PDFInfo
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- CN111876005A CN111876005A CN201910720474.6A CN201910720474A CN111876005A CN 111876005 A CN111876005 A CN 111876005A CN 201910720474 A CN201910720474 A CN 201910720474A CN 111876005 A CN111876005 A CN 111876005A
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- C—CHEMISTRY; METALLURGY
- 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
- 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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- C—CHEMISTRY; METALLURGY
- 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
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
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- C—CHEMISTRY; METALLURGY
- 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
- 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
- C09D7/62—Additives non-macromolecular inorganic modified by treatment with other compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/221—Oxides; Hydroxides of metals of rare earth metal
- C08K2003/2213—Oxides; Hydroxides of metals of rare earth metal of cerium
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/20—Applications use in electrical or conductive gadgets
- C08L2203/202—Applications use in electrical or conductive gadgets use in electrical wires or wirecoating
Abstract
The invention provides an anti-corrosion photovoltaic cable coating which comprises the following components in parts by weight: 20-40 parts of epoxy resin and CeO20.02-5 parts of @ GO composite powder, 8-20 parts of diluent, 1.5-8 parts of curing agent, 0.1-0.5 part of defoaming agent and 0.1-0.5 part of flatting agent. The invention utilizes CeO by a surface grafting method2Graphene oxide GO is modified by nano particles to prepare CeO2@ GO composite powder of CeO2The nano particles can be stably loaded on the surface of GO and CeO2The nanoparticles are inserted between GO layers to block GO agglomeration, so that the dispersity and compatibility of GO in an epoxy resin matrix are improved, and the GO is CeO2The nanoparticles provide good support to promote uniform dispersion in the epoxy resin matrix, resulting in GO and CeO2The coating can better exert respective corrosion resistance and enhancement effect, further improve the corrosion resistance of the coating, and effectively ensure the comprehensive properties of the photovoltaic cable such as waterproofness, corrosion resistance, weather resistance, chemical stability, adhesiveness and the like.
Description
Technical Field
The invention relates to the field of photovoltaic cable materials, in particular to an anti-corrosion photovoltaic cable coating and a preparation method thereof.
Background
Photovoltaic cables in photovoltaic systems are used as main electrical components, often under severe environmental conditions (such as high temperature, ultraviolet radiation, ozone, severe temperature changes, chemical erosion, etc.), and therefore, the photovoltaic cables must have good properties of high and low temperature resistance, ultraviolet resistance, weather resistance, ozone erosion resistance, etc. so as to ensure the service life of the photovoltaic cables and even the entire photovoltaic system. The existing photovoltaic cable is generally modified from cable materials and cable sheath materials in order to improve the weather resistance and the corrosion resistance, and less anticorrosive organic coatings are adopted, so that the anticorrosive performance of the existing photovoltaic cable is still deficient even though the coatings are used.
The epoxy resin coating is a common anticorrosive coating, has good chemical resistance, high temperature resistance, toughness and bonding capability, but has the defects of poor outdoor weather resistance, large coating film brittleness and the like, and in addition, the volatilization of a solvent in the curing process can form a plurality of micro-channels inside the coating, so that the corrosion resistance of the coating is reduced, and the modification of the coating is usually needed.
Graphene as a novel nano material has good barrier property and shielding property, and is often used as a functional filler to be applied to an anticorrosive coating. The graphene has a stable sp2 hybrid structure, so that a physical barrier layer can be formed between the coated material and the active medium to prevent diffusion and permeation, and the special lamellar structure has a good physical shielding effect on diffusion of water, oxygen and particles, so that the permeation path of a corrosive medium in the coating can be increased, and the corrosion prevention function of the coated material is achieved. The graphene also has good thermal stability and chemical stability, can keep relatively stable at a high temperature of 600 ℃ and in a corrosive environment, and ensures that the coating still has a good protective effect in an extreme environment. On the basis of keeping a two-dimensional structure of graphene, graphene oxide serving as a graphene derivative is grafted with partial oxygen-containing functional groups including hydroxyl, carboxyl, epoxy and the like, so that the activity and compatibility of the graphene oxide are remarkably enhanced. In addition, graphene and graphene oxide can be used as a filler to be added into a polymer or an alloy besides being used as an anticorrosion coating, and can be used as a reinforcing phase to improve the deficiency of the coating in the aspect of anticorrosion performance.
In the existing anticorrosive coatings, epoxy resin is used as a matrix, and graphene or graphene oxide is used as an anticorrosive additive, so that the defects of the epoxy resin are effectively overcome, a physical shielding effect and a reinforcing effect are achieved, and the anticorrosive coatings have the advantages of good anticorrosive effect, low coating thickness, high adhesive force, light paint film weight, excellent salt spray resistance and the like. However, since graphene and graphene oxide are easily agglomerated and have poor dispersibility and compatibility in an epoxy resin matrix, the use effect thereof is limited, and it is difficult to sufficiently exert the corrosion resistance and the reinforcing effect.
Disclosure of Invention
Aiming at the technical problems, the invention aims to provide an anti-corrosion photovoltaic cable coating and a preparation method thereof.
The technical scheme adopted by the invention is as follows: an anti-corrosion photovoltaic cable coating comprises the following components in parts by weight:
further, the CeO2The preparation method of the @ GO composite powder comprises the following steps:
a) synthesizing to obtain Graphene Oxide (GO) by adopting an improved Hummers method;
b) for nano CeO2Surface modification treatment is carried out, and a certain amount of deionized water, ethanol and nano CeO are respectively taken2Mixing, ultrasonically dispersing for 1h, placing in a flask for later use, taking a certain amount of ethanol, adding a silane coupling agent, adjusting the pH to 3-4 with acetic acid, stirring for 1h, adding into the flask, placing the flask in a 75 ℃ constant-temperature water bath, stirring for 4h, performing suction filtration, repeatedly washing with ethanol for multiple times, placing in a 60 ℃ vacuum drying oven, drying for 24h, and grinding to obtain the surface-modified nano CeO2；
c) Preparation of CeO2@ GO composite powder, nano CeO with modified surface2Adding into DMF, ultrasonic dispersing for 30min, adding GO, continuing ultrasonic dispersing for 30min, stirring the above mixed solution in 105 deg.C oil bath for 4h, vacuum filtering, washing with ethanol repeatedly, drying in 60 deg.C vacuum drying oven for 24h, grindingGrinding to obtain CeO2@ GO composite powder.
Further, the silane coupling agent in the step b) is KH550, and the silane coupling agent and the nano CeO2The mass ratio of (A) to (B) is 0.15-1: 1.
Further, the nano CeO in the step c)2The mass ratio of the carbon to GO is 1: 3.
Further, the diluent is one of acetone and ethanol.
Further, the defoaming agent is an organic silicon defoaming agent.
Further, the leveling agent is polyether modified organic siloxane.
Further, the curing agent is one of an acid anhydride curing agent and an amine curing agent.
The preparation method of the anti-corrosion photovoltaic cable coating comprises the following steps: weighing epoxy resin and CeO according to the mass ratio2The @ GO composite powder and the diluent are ultrasonically dispersed for 1h after being uniformly mixed, the defoaming agent, the leveling agent and the curing agent are sequentially added under mechanical stirring, and after being uniformly stirred, the coating is brushed on the surface of a photovoltaic cable, and an anti-corrosion photovoltaic cable coating is obtained after curing.
Compared with the prior art, the invention has the following beneficial effects: by surface grafting, using CeO2Graphene oxide GO modified by nano particles, namely nano CeO2As a rare earth compound, the rare earth compound has stronger oxidation and reduction capability, excellent oxygen storage and release performance and chemical stability, and can be used as an active filler of an anticorrosive coating. The invention firstly uses silane coupling agent to couple the nanometer CeO2Coating and modifying the surface, hydrolyzing the silane coupling agent to generate silicon hydroxyl and nano CeO2Bonding the hydroxyl on the surface, and then treating the surface with the nano CeO2Compounding with GO to obtain CeO2The amino group of the silane coupling agent reacts with the carboxyl group on the surface of the graphene oxide to form an amide group so that CeO2The nano particles can be stably loaded on the surface of GO and CeO2The nanoparticles are inserted between GO layers to block GO agglomeration, so that GO is in epoxy resin baseThe dispersibility and compatibility in the body are improved, and the GO is CeO2The nanoparticles provide good support to promote uniform dispersion in the epoxy resin matrix, resulting in GO and CeO2The coating can better exert respective corrosion resistance and enhancement effect, effectively improves the corrosion resistance of the coating, and can effectively ensure the comprehensive properties of the photovoltaic cable, such as waterproofness, corrosion resistance, weather resistance, chemical stability, adhesiveness and the like by applying the coating to the surface of the photovoltaic cable, thereby prolonging the service life of the photovoltaic cable.
Detailed Description
The present invention will be described in further detail with reference to specific embodiments.
Example 1
An anti-corrosion photovoltaic cable coating comprises the following components in parts by weight: 20 parts of epoxy resin and CeO20.02 part of @ GO composite powder, 8 parts of diluent acetone, 1.5 parts of anhydride curing agent, 0.1 part of organic silicon defoamer and 0.1 part of polyether modified organic siloxane flatting agent.
Wherein the CeO2The preparation method of the @ GO composite powder comprises the following steps:
a) graphene Oxide (GO) is synthesized by adopting an improved Hummers method, and the specific operation is as follows: mixing graphite powder and sodium nitrate, adding concentrated sulfuric acid, stirring for 30min at the temperature of 4 ℃, then slowly adding potassium permanganate, wherein the ratio of the graphite powder to the sodium nitrate to the concentrated sulfuric acid to the potassium permanganate is 2g:1g:100mL:10g, continuously stirring for 2h to uniformly mix, transferring the uniformly mixed reactant into a pre-heated 35 ℃ constant-temperature water bath, stirring for 1.5h, then slowly adding deionized water at the temperature of 35 ℃, wherein the volume ratio of the deionized water to the concentrated sulfuric acid is 1:1, transferring the deionized water into a 98 ℃ high-temperature water bath after the deionized water is added, continuously stirring for 5-15min, stopping stirring, adding the deionized water again, wherein the volume ratio of the deionized water to the concentrated sulfuric acid is 5:1, adding a 30% hydrogen peroxide solution into the deionized water after the deionized water is added until the solution turns to bright yellow and no bubbles are generated, then adding hydrochloric acid, wherein the volume ratio of the hydrochloric acid to concentrated sulfuric acid is 1:1, performing ultrasonic dispersion for 15min, repeatedly washing with deionized water, and drying in a vacuum drying oven at 60 ℃ for 24h to obtain GO;
b) for nano CeO2Surface modification treatment is carried out, and deionized water, ethanol and nano CeO are respectively taken2Wherein the deionized water, the ethanol and the nano CeO2The mixture ratio of (5 mL to 15mL to 2 g) is mixed, ultrasonic dispersion is carried out for 1h, then the mixture is placed in a flask for standby, and a certain amount of ethanol, the ethanol and nano CeO are taken2The mixture ratio of the silane coupling agent KH550 to the nano CeO is 5mL to 1g, and the silane coupling agent KH550 and the nano CeO are added into the mixture2The mass ratio of (1: 0.15) and acetic acid is used for adjusting the pH value to 3-4, the mixture is stirred for 1h and then added into the flask, the flask is placed in a thermostatic water bath with the temperature of 75 ℃ and stirred for 4h, the filtration is carried out, the mixture is repeatedly washed by ethanol for a plurality of times and then placed in a vacuum drying oven with the temperature of 60 ℃ for drying for 24h, and the nano CeO with modified surface is obtained after grinding2；
c) Preparation of CeO2@ GO composite powder, nano CeO with modified surface2Adding into DMF, ultrasonic dispersing for 30min, adding GO and nanometer CeO2The mixture ratio of DMF and GO is 0.1g:200mL:0.3g, the ultrasonic dispersion is continued for 30min, the mixed solution is put into an oil bath at 105 ℃ to be stirred for 4h, the filtration is carried out, the mixed solution is repeatedly washed by ethanol for a plurality of times, and then is put into a vacuum drying oven at 60 ℃ to be dried for 24h, and CeO is obtained after grinding2@ GO composite powder.
The preparation method of the anti-corrosion photovoltaic cable coating comprises the following steps: weighing epoxy resin and CeO according to the mass ratio2The preparation method comprises the following steps of @ GO composite powder and acetone serving as a diluent, ultrasonically dispersing for 1h after uniform mixing, sequentially adding an organic silicon defoaming agent, a polyether modified organic siloxane flatting agent and an anhydride curing agent under mechanical stirring, brushing on the surface of the photovoltaic cable after uniform stirring, and curing to obtain the anticorrosive photovoltaic cable coating.
Example 2
An anti-corrosion photovoltaic cable coating comprises the following components in parts by weight: 40 parts of epoxy resin and CeO25 parts of @ GO composite powder, 20 parts of diluent ethanol, 8 parts of amine curing agent, 0.5 part of organic silicon defoamer and 0.5 part of polyether modified organic siloxane flatting agent.
Wherein the CeO2@GThe preparation method of the O composite powder comprises the following steps:
a) graphene Oxide (GO) is synthesized by adopting an improved Hummers method, and the specific operation is the same as that in example 1;
b) for nano CeO2The surface is modified, wherein silane coupling agent KH550 and nano CeO are added2The mass ratio of (A) to (B) is 1:1, and the other operations are the same as those in example 1;
c) preparation of CeO2The specific operation of the @ GO composite powder is the same as that of example 1;
the preparation method of the anti-corrosion photovoltaic cable coating comprises the following steps: weighing epoxy resin and CeO according to the mass ratio2The coating is prepared by mixing the @ GO composite powder and a diluent ethanol uniformly, ultrasonically dispersing for 1h, sequentially adding an organic silicon defoamer, a polyether modified organic siloxane flatting agent and an amine curing agent under mechanical stirring, uniformly stirring, brushing on the surface of a photovoltaic cable, and curing to obtain the anticorrosive photovoltaic cable coating.
Example 3
An anti-corrosion photovoltaic cable coating comprises the following components in parts by weight: 30 parts of epoxy resin and CeO22.5 parts of @ GO composite powder, 14 parts of diluent acetone, 5 parts of anhydride curing agent, 0.3 part of organic silicon defoamer and 0.6 part of polyether modified organic siloxane flatting agent.
Wherein the CeO2The preparation method of the @ GO composite powder comprises the following steps:
a) graphene Oxide (GO) is synthesized by adopting an improved Hummers method, and the specific operation is the same as that in example 1;
b) for nano CeO2Surface modification treatment is carried out, wherein silane coupling agent is KH550 and nano CeO2The mass ratio of (A) to (B) was 0.6:1, and the other operations were the same as in example 1;
c) preparation of CeO2The specific operation of the @ GO composite powder is the same as that of example 1;
the preparation method of the anti-corrosion photovoltaic cable coating comprises the following steps: weighing epoxy resin and CeO according to the mass ratio2Mixing the composite powder of @ GO and acetone serving as a diluent uniformly, performing ultrasonic dispersion for 1h, and sequentially adding organic silicon under mechanical stirringAnd uniformly stirring the foaming agent, the polyether modified organic siloxane flatting agent and the anhydride curing agent, brushing the mixture on the surface of the photovoltaic cable, and curing to obtain the anticorrosive photovoltaic cable coating.
Various other modifications and changes may be made by those skilled in the art based on the above-described technical solutions and concepts, and all such modifications and changes should fall within the scope of the claims of the present invention.
Claims (9)
1. The anti-corrosion photovoltaic cable coating is characterized by comprising the following components in parts by weight:
2. the anti-corrosion photovoltaic cable coating of claim 1 wherein the CeO2The preparation method of the @ GO composite powder comprises the following steps:
a) synthesizing to obtain Graphene Oxide (GO) by adopting an improved Hummers method;
b) for nano CeO2Surface modification treatment is carried out, and a certain amount of deionized water, ethanol and nano CeO are respectively taken2Mixing, ultrasonically dispersing for 1h, placing in a flask for later use, taking a certain amount of ethanol, adding a silane coupling agent, adjusting the pH to 3-4 with acetic acid, stirring for 1h, adding into the flask, placing the flask in a 75 ℃ constant-temperature water bath, stirring for 4h, performing suction filtration, repeatedly washing with ethanol for multiple times, placing in a 60 ℃ vacuum drying oven, drying for 24h, and grinding to obtain the surface-modified nano CeO2；
c) Preparation of CeO2@ GO composite powder, nano CeO with modified surface2Adding into DMF, ultrasonically dispersing for 30min, adding GO, ultrasonically dispersing for 30min, stirring the mixture in 105 deg.C oil bath for 4 hr, vacuum filtering, washing with ethanol for several times, drying in 60 deg.C vacuum drying oven for 24 hr, and grinding to obtain CeO2@ GO composite powder.
3. An anti-corrosion photovoltaic cable coating according to claim 2, wherein: the silane coupling agent in the step b) is KH550, and the silane coupling agent and the nano CeO2The mass ratio of (A) to (B) is 0.15-1: 1.
4. An anti-corrosion photovoltaic cable coating according to claim 2, wherein: the nano CeO in the step c)2The mass ratio of the carbon to GO is 1: 3.
5. The anti-corrosion photovoltaic cable coating of claim 1, wherein: the diluent is one of acetone and ethanol.
6. The anti-corrosion photovoltaic cable coating of claim 1, wherein: the defoaming agent is an organic silicon defoaming agent.
7. The anti-corrosion photovoltaic cable coating of claim 1, wherein: the leveling agent is polyether modified organic siloxane.
8. The anti-corrosion photovoltaic cable coating of claim 1, wherein: the curing agent is one of an anhydride curing agent and an amine curing agent.
9. The method of preparing an anti-corrosion photovoltaic cable coating according to any of claims 1 to 8, comprising the steps of: weighing epoxy resin and CeO according to the mass ratio2The @ GO composite powder and the diluent are ultrasonically dispersed for 1h after being uniformly mixed, the defoaming agent, the leveling agent and the curing agent are sequentially added under mechanical stirring, and after being uniformly stirred, the coating is brushed on the surface of a photovoltaic cable, and an anti-corrosion photovoltaic cable coating is obtained after curing.
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| CN112920688A (en) * | 2021-03-09 | 2021-06-08 | 上海先权光纤科技有限公司 | High-hardness coating for glass and preparation method thereof |
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| CN115141505A (en) * | 2021-03-30 | 2022-10-04 | 宁波江北激智新材料有限公司 | Anti-corrosion polishing-resistant curing coating composition and preparation method thereof |
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Application publication date: 20201103 |