CN116463055A - Flashover voltage-resistant nano composite coating and preparation method thereof - Google Patents
Flashover voltage-resistant nano composite coating and preparation method thereof Download PDFInfo
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- 238000000576 coating method Methods 0.000 title claims abstract description 133
- 239000011248 coating agent Substances 0.000 title claims abstract description 121
- 239000002114 nanocomposite Substances 0.000 title claims abstract description 22
- 238000002360 preparation method Methods 0.000 title abstract description 35
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 113
- 239000002105 nanoparticle Substances 0.000 claims abstract description 60
- 239000004408 titanium dioxide Substances 0.000 claims abstract description 52
- 238000003756 stirring Methods 0.000 claims abstract description 45
- 239000002904 solvent Substances 0.000 claims abstract description 29
- 239000011259 mixed solution Substances 0.000 claims abstract description 27
- 239000003607 modifier Substances 0.000 claims abstract description 23
- 229920002379 silicone rubber Polymers 0.000 claims abstract description 22
- 239000004945 silicone rubber Substances 0.000 claims abstract description 16
- 239000008367 deionised water Substances 0.000 claims abstract description 12
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 12
- SOQBVABWOPYFQZ-UHFFFAOYSA-N oxygen(2-);titanium(4+) Chemical class [O-2].[O-2].[Ti+4] SOQBVABWOPYFQZ-UHFFFAOYSA-N 0.000 claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000001035 drying Methods 0.000 claims abstract description 9
- 238000001132 ultrasonic dispersion Methods 0.000 claims abstract description 6
- 239000002245 particle Substances 0.000 claims description 18
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims description 12
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 8
- 238000009832 plasma treatment Methods 0.000 claims description 8
- XDLMVUHYZWKMMD-UHFFFAOYSA-N 3-trimethoxysilylpropyl 2-methylprop-2-enoate Chemical compound CO[Si](OC)(OC)CCCOC(=O)C(C)=C XDLMVUHYZWKMMD-UHFFFAOYSA-N 0.000 claims description 6
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 6
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 6
- WYTZZXDRDKSJID-UHFFFAOYSA-N (3-aminopropyl)triethoxysilane Chemical compound CCO[Si](OCC)(OCC)CCCN WYTZZXDRDKSJID-UHFFFAOYSA-N 0.000 claims description 5
- 235000006408 oxalic acid Nutrition 0.000 claims description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 3
- 239000003002 pH adjusting agent Substances 0.000 claims description 3
- 239000012299 nitrogen atmosphere Substances 0.000 claims description 2
- 230000002209 hydrophobic effect Effects 0.000 abstract description 6
- 230000003373 anti-fouling effect Effects 0.000 abstract description 4
- 239000002131 composite material Substances 0.000 description 87
- 230000000052 comparative effect Effects 0.000 description 70
- 239000000463 material Substances 0.000 description 39
- 239000000243 solution Substances 0.000 description 14
- 239000012212 insulator Substances 0.000 description 12
- 238000009826 distribution Methods 0.000 description 10
- 239000011159 matrix material Substances 0.000 description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- 238000010292 electrical insulation Methods 0.000 description 4
- 238000009413 insulation Methods 0.000 description 4
- 229920000642 polymer Polymers 0.000 description 4
- 238000004506 ultrasonic cleaning Methods 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 239000003989 dielectric material Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000945 filler Substances 0.000 description 3
- 238000007689 inspection Methods 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 239000003973 paint Substances 0.000 description 3
- 238000011056 performance test Methods 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 229910010413 TiO 2 Inorganic materials 0.000 description 2
- 239000002585 base Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000012512 characterization method Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000001878 scanning electron micrograph Methods 0.000 description 2
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- 241001391944 Commicarpus scandens Species 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000009194 climbing Effects 0.000 description 1
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- 238000002474 experimental method Methods 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 238000003682 fluorination reaction Methods 0.000 description 1
- 230000005661 hydrophobic surface Effects 0.000 description 1
- 239000011256 inorganic filler Substances 0.000 description 1
- 229910003475 inorganic filler Inorganic materials 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
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- 229910052719 titanium Inorganic materials 0.000 description 1
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Classifications
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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
- C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
- C09D183/04—Polysiloxanes
-
- 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
-
- 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
- C09D5/18—Fireproof paints including high temperature resistant 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
- 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
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Paints Or Removers (AREA)
Abstract
The invention discloses a flashover voltage resistant nano composite coating and a preparation method thereof, wherein the flashover voltage resistant nano composite coating comprises the following components in parts by mass: 91-97 parts of silicone rubber, 3-9 parts of titanium dioxide nano particles, 7-9 parts of modifier and 20-35 parts of solvent; the preparation method comprises the following steps: (1) Adding titanium dioxide nano particles into a mixed solution of a solvent and deionized water, and uniformly stirring to obtain a mixed solution A; (2) Adding a modifier into the mixed solution A, stirring and drying to obtain modified titanium dioxide nano particles; (3) Adding the modified titanium dioxide nano particles into a solvent, stirring and performing ultrasonic dispersion to obtain a mixed solution B; (4) And adding the mixed solution B into the silicon rubber, and removing bubbles after uniformly stirring. The coating formed by the coating has good hydrophobicity, antifouling property, flame retardance, acid-base resistance and flashover resistance, and the flashover resistance voltage and the hydrophobic angle are obviously improved.
Description
Technical Field
The invention relates to the field of high polymer materials, in particular to a flashover voltage-resistant nano composite coating and a preparation method thereof.
Background
The distribution line insulator can support wires, prevent current from flowing back to the ground and increase creepage distance, can withstand voltage and mechanical stress, and plays an important role in overhead distribution lines. The fault rate of the insulator of the distribution line is high and the safe and stable operation of the distribution line is seriously affected by the influence of factors such as complex operation environment. Especially, the insulator is difficult to find through manual inspection, and the circuit frequently has ground faults due to insufficient insulation creepage distance and insufficient withstand voltage level in high humidity environments such as thunderstorm weather. Aiming at the defects, no effective identification and treatment method exists at present, and sectional line inspection, even pole climbing inspection one by one, is often needed, so that the defect fault searching has long fault time, and is time-consuming and labor-consuming; meanwhile, the defect insulator is extremely easy to break down and damage to cause broken wires, so that the operation and maintenance rush repair difficulty of the distribution network is increased, and the safe and stable operation of the distribution network is influenced. With the continuous development of social economy, the construction level of the urban power supply system is continuously improved, and the power cable gradually replaces overhead lines to become a main transmission point form of the urban power distribution network. In a power cable system, a cable joint (including a terminal head and an intermediate joint) is one of the weakest links, and statistics show that: in non-external damage, the faults caused by the cable joints account for 80% of the cable system faults. Polymer insulation dielectrics are widely used as insulation materials for electrical equipment, the properties of which largely determine the quality of the electrical equipment. For high-voltage and ultra-high-voltage cables, with the development of intelligent power grids taking an ultra-high voltage power grid as a framework, the voltage level and the capacity of power transmission and distribution equipment are continuously improved, the working field intensity of cable insulation is continuously increased, and the insulation failure aging under the actions of operating voltage, heat, mechanical force and the like becomes a hidden danger of reliable operation of the cables and is an important source endangering the operation safety of the power grid.
The technical scheme of modifying the surface components and the surface morphology of the insulator is explored, the performance of the insulator is improved by modifying the surface of the insulator, the service life of the insulator is prolonged, the labor intensity of operation and maintenance personnel is reduced, and the safe and stable operation of a circuit is ensured. The insulating properties of the cable joint material are closely related to the surface state of the material. The surface state of a material includes the characteristics of the material itself, and the surface flatness, degree of contamination, etc. In order to ensure safe and stable operation of the power cable and inhibit the occurrence of surface flashover, researchers modify the insulating material by plasma treatment, fluorination, surface coating and other methods. Wherein the coating technology can regulate the surface state of the insulating material according to the requirement by changing the coating material. In addition, in the cable joint of actual engineering operation, promote cable joint oversheath electrical property through simple and easy spraying technique, furthest avoids its creeping discharge, prevents the cost saving more and also easier realization to the trouble in advance, greatly reduced cable line's running cost.
In order to further improve the electrical insulation performance of the surface of the distribution line insulator and improve the mechanical strength and the electrical insulation performance of the silicon rubber, the silicon rubber meets the operation requirement, and the surface of the insulator or the silicon rubber is required to be modified and enhanced. Since polymer nano-dielectrics are proposed by Lewis in 1994, the research of dielectrics changes from the traditional theory to the nano-scale mesotheory, nano-scale inorganic fillers are added into a polymer matrix, and then a special effect of micro-scale is introduced into a composite material, so that the macro-performance of the material can be greatly influenced. Nanometer TiO 2 Due to the large specific surface area and high surface activity of the particles, a large amount of interface areas can be introduced into the composite material by a small amount of doping, so that the electrical properties of the polymer matrix, such as volume resistivity and breakdown strength of the matrix, are obviously improved, and the mechanical properties and thermal stability of the material are improved. However, the existing titanium dioxide-added coating has poor pressure resistance and hydrophobic property, and cannot effectively realize the operation reliability of insulators and power cables.
Disclosure of Invention
The invention aims to further improve the electrical insulation performance of the surface of a distribution line insulator, and improve the mechanical strength and the electrical insulation performance of silicone rubber, and provides a preparation method of a flashover voltage-resistant nano composite coating. Adopts RTV electric power anti-pollution flashover coating as a base material, and selects TiO 2 The nano particles are doped, and the anti-pollution flashover composite coating material is prepared by utilizing different doping ratios.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
a flashover voltage resistant nano composite coating comprises the following components in parts by weight:
91-97 parts of room temperature vulcanized silicone rubber; 3-9 parts of titanium dioxide nano particles, 7-9 parts of modifier and 20-35 parts of solvent;
the titanium dioxide nano particles are titanium dioxide anatase, and the particle size of the titanium dioxide anatase is 5-10 nm.
According to the technical scheme, titanium dioxide anatase with extremely small particle size range is selected as the filler of the composite material, and can be uniformly dispersed in the matrix material after modification, compared with titanium dioxide with particle size range of 500-800 nm commonly used in the prior art, the nano particles with small particle size are easier to form materials with hydrophobicity, antifouling property and high flashover resistance, and experiments show that the dispersion effect of the nano particles with particle size of 25nm and 10nm is equivalent, the flashover resistance voltage can reach 8.794kV, and is about 47.01% higher than that of common flashover resistant coatings and materials.
As a further preferable aspect of the above technical solution, the modifier includes at least one of γ -methacryloxypropyl trimethoxysilane and γ -aminopropyl triethoxysilane. The gamma-methacryloxypropyl trimethoxy silane or gamma-aminopropyl triethoxy silane is used for modifying the nano particles, so that the surfaces of the nano particles are hydrophobic, the dispersion of the nano particles in a matrix is promoted, and the stability of the performance of the composite material is ensured.
As a further preferable aspect of the above technical solution, the silicone rubber is room temperature vulcanized silicone rubber. Greenhouse vulcanized silicone rubber is used as a base material of a coating, and the viscosity and the curing time are more suitable than other silicone rubber.
As a further preferable aspect of the above technical solution, the solvent includes at least one of absolute ethanol, methanol, and acetone.
As a further preferable aspect of the above technical solution, the flashover voltage resistant nanocomposite coating further comprises 0.1 to 0.3 part by mass of a pH adjuster, wherein the pH adjuster comprises at least one of oxalic acid or hydrochloric acid.
Based on the same technical conception, the invention also provides a preparation method of the flashover voltage resistant nano composite coating, which comprises the following steps:
(1) Treating titanium dioxide nano particles by using an isoionic body at a low temperature for 0.5-2 min, adding the titanium dioxide nano particles into a mixed solution of a solvent and deionized water, and uniformly stirring to obtain a mixed solution A;
(2) Adding the modifier into the mixed solution A, stirring for 50-70 min at 70-90 ℃, and drying for 12-24 h at 90-110 ℃ to obtain modified titanium dioxide nano particles;
(3) Adding the modified titanium dioxide nano particles into a solvent, stirring and performing ultrasonic dispersion to obtain a mixed solution B;
(4) And adding the mixed solution B into silicon rubber, uniformly stirring, and then removing bubbles to obtain the flashover voltage-resistant nano composite coating.
As a further preferred aspect of the above-mentioned technical scheme, when the titanium dioxide nanoparticles are treated by plasma treatment in the step (1), the plasma treatment condition is that a sinusoidal voltage with a frequency of 20kHz and a voltage of 1kV is applied under a nitrogen atmosphere at room temperature.
As a further preferable mode of the technical scheme, in the step (1), the stirring speed is 500-600 r/min, and the stirring time is 10-20 min.
As a further preferable mode of the technical scheme, in the step (3), the stirring speed is 300-700 r/min, the stirring time is 20-30 min, and the ultrasonic time is 25-35 min.
As a further preferable aspect of the above technical solution, the stirring operation in step (4) is: firstly stirring at a stirring speed of 300-700 r/min for 10-15 min, and then stirring at a stirring speed of 500-900 r/min for 60-90 min.
As a further preferable mode of the technical scheme, the bubble removal in the step (4) is realized by ultrasonic cleaning, and the cleaning time is 20-30 min.
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, titanium dioxide anatase with the particle size of 5-10nm is used as a filler, gamma-methacryloxypropyl trimethoxysilane or gamma-aminopropyl triethoxysilane is used as a modifier, nano particles subjected to surface modification treatment are hydrophobic surfaces, and can be uniformly dispersed in a matrix material, and compared with the material with the particle size of 500-800 nm of the titanium dioxide filler in the prior art, the coating formed by the coating has good hydrophobic, antifouling and flashover resistance, the flashover resistance voltage is generally 8.794kV, the flashover resistance is higher than that of a common flashover resistance coating by about 47.01%, the flashover resistance is reasonably matched and can be permanently protected, and the static hydrophobic angle is improved by about 74.1 DEG compared with that of the common flashover resistance coating, and the coating is kept well adhered to the matrix material, does not peel and fall off in a tensile test, and has good antifouling, flame retardant and acid-alkali resistance.
Drawings
FIG. 1 is a flow chart of the preparation of nanocomposite coatings from examples 1-3;
FIG. 2 is an SEM image of the coating formed by the composite coating materials of examples 1 to 3 and comparative example 1;
FIG. 3 is a graph of the hydrophobic angle test of the coatings formed by the composite coatings of examples 1-3 and comparative example 1;
FIG. 4 is a graph of the relative dielectric constants of the coatings formed from the composite coatings of examples 1-3 and comparative example 1;
FIG. 5 is a graph showing the surface potential decay of the coatings formed by the composite coatings of examples 1 to 3 and comparative example 1.
Detailed Description
The present invention will be described in further detail with reference to specific examples.
Example 1:
the flashover voltage resistant composite coating comprises the following components in parts by mass:
97 parts of room temperature vulcanized silicone rubber, 35 parts of solvent, 3 parts of titanium dioxide nano particles, 0.03 part of pH regulator and 9 parts of modifier; wherein the solvent is absolute ethyl alcohol, the titanium dioxide nano particles are titanium dioxide anatase with the particle size of 10nm, the pH regulator is oxalic acid, and the modifier is gamma-methacryloxypropyl trimethoxysilane.
The preparation method of the flashover voltage resistant composite coating of the embodiment, as shown in fig. 1, comprises the following steps:
(1) Treating titanium dioxide nano particles by using an isothermal low-temperature ion body for 1min, adding the titanium dioxide nano particles into a solvent and deionized water solution, and stirring at a constant speed of 500r/min for 20min to obtain a mixed solution A; the plasma treatment condition is that sinusoidal voltage with voltage of 1kV and frequency of 20kHz is externally applied in a room temperature nitrogen environment;
(2) Adding a modifier into the mixed solution A, stirring at a constant speed of 300r/min for 60min at 80 ℃, recovering to room temperature, and drying in a drying oven at 100 ℃ for 24h to obtain modified titanium dioxide nano particles;
(3) Adding the modified titanium dioxide nano particles into a solvent, uniformly stirring for 20min at 300r/min, and performing ultrasonic dispersion for 30min to obtain a mixed solution B;
(4) Adding the mixed solution B into room temperature vulcanized silicone rubber, stirring at a constant speed of 300r/min for 10min, regulating the speed to 500r/min, stirring at a constant speed, continuing ultrasonic cleaning for 1h, and removing bubbles for 30min to obtain the flashover voltage-resistant composite coating.
Comparative example 1:
the composite coating material of this comparative example was different from example 1 in that the composite coating material of this comparative example was free of titanium dioxide nanoparticles and modifier, and the other components and the amounts added were the same as those of example 1.
The preparation method of the composite coating material of the present comparative example is different from that of example 1 in that the preparation method of the composite coating material of the present comparative example does not have steps (1) to (3) related to the titanium dioxide nanoparticles and the modifier.
Comparative example 2:
the composite coating material of this comparative example was different from example 1 in that the amount of titanium dioxide nanoparticles added to the composite coating material of this comparative example was 1 part by mass, and the other components, the amount of addition, and the preparation method of the composite coating material were the same as those of example 1.
Comparative example 3:
the composite coating of this comparative example was different from example 1 in that the titanium dioxide nanoparticles in the preparation method of the composite coating of this comparative example were not subjected to the treatment of the isothermal low temperature ionic body before being added to the solvent and deionized water solution, and the other components, the addition amounts, and the preparation method of the composite coating were all identical to those of example 1.
Comparative example 4:
the composite coating of this comparative example was different from example 1 in that no modifier was added to the composite coating of this comparative example, and the other components, the amounts added, and the preparation method of the composite coating were the same as in example 1.
Comparative example 5:
the composite coating of this comparative example was different from example 1 in that the titanium dioxide nanoparticles were subjected to the treatment with an isoionic agent for 10 minutes before being added to the solvent and deionized water solution in the preparation method of the composite coating of this comparative example, and the other components, the addition amounts, and the preparation method of the composite coating were the same as in example 1.
Comparative example 6:
the composite coating material of this comparative example was different from example 1 in that the particle diameter of the titanium dioxide nanoparticles in the composite coating material of this comparative example was 100nm, and the other components, the addition amounts, and the preparation method of the composite coating material were the same as those of example 1.
Comparative example 7:
the composite coating material of this comparative example was different from example 1 in that the particle diameter of the titanium dioxide nanoparticles in the composite coating material of this comparative example was 1. Mu.m, and the other components, the addition amounts, and the preparation method of the composite coating material were the same as those of example 1.
The composite coating with flashover voltage resistance of the example 1 and the composite coatings of the comparative examples are cured at room temperature for 48 hours to form a coating, and the coating performance is tested, and the results are shown in the table 1, and the results prove that the coating formed by the composite coating has better pressure resistance, hydrophobicity and thermal stability.
Table 1: results of the composite paint coating Performance test of example 1 and each comparative example
Example 2:
the flashover voltage resistant composite coating comprises the following components in parts by mass:
95 parts of room temperature vulcanized silicone rubber, 8 parts of modifier, 6 parts of titanium dioxide nano particles, 25 parts of solvent and 0.2 part of pH regulator; wherein the solvent is acetone, the titanium dioxide nano particles are titanium dioxide anatase with the particle size of 10nm, the pH regulator is oxalic acid, and the modifier is gamma-methacryloxypropyl trimethoxysilane.
The preparation method of the flashover voltage resistant composite coating comprises the following steps:
(1) Treating titanium dioxide nano particles by using an isothermal low-temperature ion body for 1min, adding the titanium dioxide nano particles into a solvent and deionized water solution, and stirring at a constant speed of 500r/min for 20min to obtain a mixed solution A; the plasma treatment condition is that sinusoidal voltage with voltage of 1kV and frequency of 20kHz is externally applied in a room temperature nitrogen environment;
(2) Adding a modifier into the mixed solution A, stirring at a constant speed of 300r/min for 60min at 80 ℃, recovering to room temperature, and drying in a drying oven at 100 ℃ for 24h to obtain modified titanium dioxide nano particles;
(3) Adding the modified titanium dioxide nano particles into a solvent, uniformly stirring for 20min at 500r/min, and performing ultrasonic dispersion for 30min to obtain a mixed solution B;
(4) Adding the mixed solution B into room temperature vulcanized silicone rubber, stirring at a constant speed of 500r/min for 10min, regulating the speed to 800r/min, stirring at a constant speed, continuing ultrasonic cleaning for 1.5h, and removing bubbles for 30min to obtain the flashover voltage-resistant composite coating.
Comparative example 8:
the composite coating material of this comparative example was different from example 2 in that the amount of titanium dioxide nanoparticles added in the composite coating material of this comparative example was 1 part by mass, and the other components, the amount of addition, and the preparation method of the composite coating material were the same as those of example 2.
Comparative example 9:
the composite coating of this comparative example was different from example 2 in that the titanium dioxide nanoparticles in the preparation method of the composite coating of this comparative example were not subjected to the treatment of the isothermal low temperature ionic body before being added to the solvent and deionized water solution, and the other components, the addition amounts, and the preparation method of the composite coating were all identical to example 2.
Comparative example 10:
the composite coating of this comparative example was different from example 2 in that no modifier was added to the composite coating of this comparative example, and the other components, the amounts added, and the preparation method of the composite coating were the same as in example 2.
Comparative example 11:
the composite coating of this comparative example was different from example 2 in that the titanium dioxide nanoparticles were treated with an isoionic agent for 10 minutes before being added to the solvent and deionized water solution, and the other components, the addition amounts, and the preparation method of the composite coating were the same as in example 2.
Comparative example 12:
the composite coating of this comparative example was different from example 2 in that the particle diameter of the titanium dioxide nanoparticles in the composite coating of this comparative example was 100nm, and the other components, the addition amounts, and the preparation method of the composite coating were the same as those of example 2.
Comparative example 13:
the composite coating material of this comparative example was different from example 2 in that the particle diameter of the titanium dioxide nanoparticles in the composite coating material of this comparative example was 1. Mu.m, and the other components, the addition amounts, and the preparation method of the composite coating material were the same as those of example 2.
The composite coating with flashover voltage resistance of the example 2 and the composite coatings of the comparative examples are cured at room temperature for 48 hours to form a coating, and the coating performance is tested, and the results are shown in the table 2, and the results prove that the coating formed by the composite coating has better pressure resistance, hydrophobicity and thermal stability.
Table 2: example 2 and comparative examples composite paint coating Performance test results
Example 3:
the flashover voltage resistant composite coating comprises the following components in parts by mass:
91 parts of room temperature vulcanized silicone rubber, 35 parts of solvent, 9 parts of titanium dioxide nano particles, 0.3 part of pH regulator and 9 parts of modifier; wherein the solvent is acetone, the titanium dioxide nano particles are titanium dioxide anatase with the particle size of 25nm, the pH regulator is hydrochloric acid, and the modifier is gamma-aminopropyl triethoxysilane.
The preparation method of the flashover voltage resistant composite coating comprises the following steps:
(1) Treating titanium dioxide nano particles by using an isothermal low-temperature ion body for 1min, adding the titanium dioxide nano particles into a solvent and deionized water solution, and stirring at a constant speed of 500r/min for 20min to obtain a mixed solution A; the plasma treatment condition is that sinusoidal voltage with voltage of 1kV and frequency of 20kHz is externally applied in a room temperature nitrogen environment;
(2) Adding the modifier into the mixed solution A, stirring at a constant speed of 500r/min for 50min at 90 ℃, recovering to room temperature, and drying in a drying oven at 100 ℃ for 24h to obtain modified titanium dioxide nano particles;
(3) Adding the modified titanium dioxide nano particles into a solvent, uniformly stirring for 20min at 500r/min, and performing ultrasonic dispersion for 30min to obtain a mixed solution B;
(4) Adding the mixed solution B into room temperature vulcanized silicone rubber, stirring at a constant speed of 500r/min for 10min, regulating the speed to 800r/min, stirring at a constant speed, continuing ultrasonic cleaning for 1h, and removing bubbles for 30min to obtain the flashover voltage-resistant composite coating.
Comparative example 14:
the composite coating material of this comparative example was different from example 3 in that the amount of titanium dioxide nanoparticles added in the composite coating material of this comparative example was 1 part by mass, and the other components, the amount of addition, and the preparation method of the composite coating material were the same as those of example 3.
Comparative example 15:
the composite coating of this comparative example was different from example 3 in that the titanium dioxide nanoparticles in the preparation method of the composite coating of this comparative example were not subjected to the treatment of the isothermal low temperature ionic body before being added to the solvent and deionized water solution, and the other components, the addition amounts, and the preparation method of the composite coating were all identical to example 3.
Comparative example 16:
the composite coating of this comparative example was different from example 3 in that no modifier was added to the composite coating of this comparative example, and the other components, the amounts added, and the preparation method of the composite coating were the same as in example 3.
Comparative example 17:
the composite coating of this comparative example was different from example 3 in that the titanium dioxide nanoparticles were treated with an isoionic agent for 10 minutes before being added to the solvent and deionized water solution, and the other components, the addition amounts, and the preparation method of the composite coating were the same as in example 3.
Comparative example 18:
the composite coating of this comparative example was different from example 3 in that the particle diameter of the titanium dioxide nanoparticles in the composite coating of this comparative example was 100nm, and the other components, the addition amounts, and the preparation method of the composite coating were the same as those of example 3.
Comparative example 19:
the composite coating material of this comparative example was different from example 3 in that the particle diameter of the titanium dioxide nanoparticles in the composite coating material of this comparative example was 1. Mu.m, and the other components, the addition amounts, and the preparation method of the composite coating material were the same as those of example 3.
The composite coating with flashover voltage resistance of the example 3 and the composite coating of each comparative example are cured at room temperature for 48 hours to form a coating, the coating performance is tested, the results are shown in the table 3, and the results prove that the coating formed by the composite coating has better pressure resistance, hydrophobicity and thermal stability.
Table 3: example 3 and comparative examples composite paint coating Performance test results
The coatings formed by the composite coatings of examples 1 to 3 and comparative example 1 were tested, the SEM images of which are shown in fig. 2 (a, b, c, d in fig. 2 is the characterization result of examples 1 to 3 and comparative example 1, respectively), the hydrophobicity test results are shown in fig. 3 (a, b, c, d in fig. 3 is the characterization result of examples 1 to 3 and comparative example 1, respectively), the relative permittivity test results are shown in fig. 4, and the surface potential attenuation results are shown in fig. 5.
The above description is merely a preferred embodiment of the present invention, and the scope of the present invention is not limited to the above examples. Modifications and variations which would be obvious to those skilled in the art without departing from the spirit of the invention are also considered to be within the scope of the invention.
Claims (10)
1. The flashover voltage resistant nano composite coating is characterized by comprising the following components in parts by mass:
91-97 parts of silicone rubber, 3-9 parts of titanium dioxide nano particles, 7-9 parts of modifier and 20-35 parts of solvent;
the titanium dioxide nano particles are titanium dioxide anatase, and the particle size of the titanium dioxide anatase is 5-10nm or 25nm.
2. The flashover voltage resistant nanocomposite coating according to claim 1, wherein the modifier comprises one or both of gamma-methacryloxypropyl trimethoxysilane and gamma-aminopropyl triethoxysilane.
3. The flashover voltage resistant nanocomposite coating according to claim 1, wherein the silicone rubber is a room temperature vulcanized silicone rubber.
4. The flashover voltage resistant nanocomposite coating according to claim 1, wherein the solvent comprises at least one of absolute ethanol, methanol, and acetone.
5. The flashover voltage resistant nanocomposite coating according to any one of claims 1-4, further comprising 0.1-0.3 parts by mass of a pH adjuster comprising at least one of oxalic acid or hydrochloric acid.
6. A method of preparing a flashover voltage resistant nanocomposite coating according to any one of claims 1-5, comprising the steps of:
(1) Treating titanium dioxide nano particles by using an isoionic body at a low temperature for 0.5-2 min, adding the titanium dioxide nano particles into a mixed solution of a solvent and deionized water, and uniformly stirring to obtain a mixed solution A;
(2) Adding the modifier into the mixed solution A, stirring for 50-70 min at 70-90 ℃, and drying for 12-24 h at 90-110 ℃ to obtain modified titanium dioxide nano particles;
(3) Adding the modified titanium dioxide nano particles into a solvent, stirring and performing ultrasonic dispersion to obtain a mixed solution B;
(4) And adding the mixed solution B into silicon rubber, uniformly stirring, and then removing bubbles to obtain the flashover voltage-resistant nano composite coating.
7. The method for preparing a flashover voltage resistant nano composite coating according to claim 6, wherein when the titanium dioxide nanoparticles are treated by plasma treatment in the step (1), the plasma treatment condition is to apply a sinusoidal voltage with a frequency of 20kHz and a voltage of 1kV in a nitrogen atmosphere at room temperature.
8. The method for preparing a flashover voltage resistant nano composite coating according to claim 6, wherein the stirring speed in the step (1) is 500-600 r/min, and the stirring time is 18-25 min.
9. The method for preparing a flashover voltage resistant nano composite coating according to claim 6, wherein the stirring speed in the step (3) is 300-500 r/min, the stirring time is 18-25 min, the ultrasonic frequency is 40kHz, and the ultrasonic time is 25-35 min.
10. The method of preparing a flashover voltage resistant nanocomposite coating according to claim 6, wherein the stirring operation in step (4) is: firstly stirring at a stirring speed of 300-500 r/min for 10-15 min, and then stirring at a stirring speed of 500-800 r/min for 60-90 min.
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| CN116855169A (en) * | 2023-08-10 | 2023-10-10 | 西安工程大学 | Nanocomposite coating material for insulator surface anti-pollution flashover and preparation method thereof |
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