CN116622286A - Conductor protective grease and preparation method and application thereof - Google Patents
Conductor protective grease and preparation method and application thereof Download PDFInfo
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- CN116622286A CN116622286A CN202310607173.9A CN202310607173A CN116622286A CN 116622286 A CN116622286 A CN 116622286A CN 202310607173 A CN202310607173 A CN 202310607173A CN 116622286 A CN116622286 A CN 116622286A
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- grease
- conductor
- silicone oil
- carbon black
- boron nitride
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- 239000004519 grease Substances 0.000 title claims abstract description 70
- 239000004020 conductor Substances 0.000 title claims abstract description 50
- 230000001681 protective effect Effects 0.000 title claims description 28
- 238000002360 preparation method Methods 0.000 title abstract description 9
- 229920003216 poly(methylphenylsiloxane) Polymers 0.000 claims abstract description 29
- 239000006229 carbon black Substances 0.000 claims abstract description 25
- 229910052582 BN Inorganic materials 0.000 claims abstract description 24
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 claims abstract description 24
- 230000005540 biological transmission Effects 0.000 claims abstract description 14
- 230000009466 transformation Effects 0.000 claims abstract description 12
- 238000002156 mixing Methods 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 7
- 238000000227 grinding Methods 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 6
- 238000002604 ultrasonography Methods 0.000 claims description 5
- 238000009210 therapy by ultrasound Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 239000011347 resin Substances 0.000 claims 2
- 229920005989 resin Polymers 0.000 claims 2
- 230000032683 aging Effects 0.000 abstract description 16
- 150000003839 salts Chemical class 0.000 abstract description 16
- 239000007921 spray Substances 0.000 abstract description 12
- 230000003647 oxidation Effects 0.000 abstract description 10
- 238000007254 oxidation reaction Methods 0.000 abstract description 10
- 239000002199 base oil Substances 0.000 abstract description 9
- 239000002131 composite material Substances 0.000 description 10
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 8
- 238000012360 testing method Methods 0.000 description 7
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 6
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 4
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 4
- 239000011231 conductive filler Substances 0.000 description 4
- 229910052744 lithium Inorganic materials 0.000 description 4
- 230000001590 oxidative effect Effects 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 238000001556 precipitation Methods 0.000 description 4
- 239000000654 additive Substances 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 229910021389 graphene Inorganic materials 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229920002545 silicone oil Polymers 0.000 description 3
- 238000007711 solidification Methods 0.000 description 3
- 230000008023 solidification Effects 0.000 description 3
- 239000011787 zinc oxide Substances 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical group [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 241000872198 Serjania polyphylla Species 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 2
- 239000003963 antioxidant agent Substances 0.000 description 2
- 230000003078 antioxidant effect Effects 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 125000000118 dimethyl group Chemical group [H]C([H])([H])* 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000007665 sagging Methods 0.000 description 2
- 239000012266 salt solution Substances 0.000 description 2
- 239000000344 soap Substances 0.000 description 2
- 239000003381 stabilizer Substances 0.000 description 2
- 206010013642 Drooling Diseases 0.000 description 1
- 208000008630 Sialorrhea Diseases 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- NWFNSTOSIVLCJA-UHFFFAOYSA-L copper;diacetate;hydrate Chemical compound O.[Cu+2].CC([O-])=O.CC([O-])=O NWFNSTOSIVLCJA-UHFFFAOYSA-L 0.000 description 1
- 229940008099 dimethicone Drugs 0.000 description 1
- 239000004205 dimethyl polysiloxane Substances 0.000 description 1
- 235000013870 dimethyl polysiloxane Nutrition 0.000 description 1
- -1 dimethyl siloxane Chemical class 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000000718 radiation-protective agent Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
- 238000001132 ultrasonic dispersion Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
- C09K5/08—Materials not undergoing a change of physical state when used
-
- 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
- C09D5/24—Electrically-conducting 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
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/20—Conductive material dispersed in non-conductive organic material
- H01B1/24—Conductive material dispersed in non-conductive organic material the conductive material comprising carbon-silicon compounds, carbon or silicon
-
- 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
- C08K3/38—Boron-containing compounds
- C08K2003/382—Boron-containing compounds and nitrogen
- C08K2003/385—Binary compounds of nitrogen with boron
-
- 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
- C08K2201/001—Conductive additives
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Physics & Mathematics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Inorganic Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Combustion & Propulsion (AREA)
- Thermal Sciences (AREA)
- Lubricants (AREA)
Abstract
The invention provides a conductor protection grease, a preparation method and application thereof, wherein the conductor protection grease comprises a combination of methyl phenyl silicone oil, carbon black and boron nitride; by selecting methyl phenyl silicone oil as base oil and utilizing the excellent thermal stability of the methyl phenyl silicone oil and matching with carbon black and boron nitride, the finally obtained conductor protection grease has excellent high temperature resistance, salt spray resistance, wet heat resistance, thermal oxidation aging resistance and higher conductivity, further has wider use temperature, and is suitable for being used in electric connection joints of high-voltage power transmission and transformation equipment, in particular to high-voltage power transmission and transformation equipment in southern areas.
Description
Technical Field
The invention belongs to the technical field of electric power composite grease, and particularly relates to a conductor protection grease and a preparation method and application thereof.
Background
The conductor protective grease (also called as electric composite grease) is a novel neutral electrical material with good electric contact performance, is a semisolid lubricating paste prepared from base oil, a thickening agent and an additive, has been widely used in the work of power transmission, power transformation, power distribution equipment installation, overhaul and maintenance and the like, and when in use, the conductor protective grease is directly coated on an electric connection part, so that the contact resistance of the connection part is obviously reduced, and a good electricity-saving economic effect is obtained.
The main components of the electric power composite grease comprise two parts of oil and conductive filler, and the types of base oil and additives (conductive filler) play a decisive role in the performance of the electric power composite grease.
CN108456428A discloses a radiation-resistant high-efficiency electric power compound grease and a preparation method thereof, wherein the components of the electric power compound grease comprise: 100 parts of special oil for special electric grease, 5-20 parts of white carbon black, 50-200 parts of conductive metal powder, 5-60 parts of anti-radiation agent, 0-2 parts of antioxidant and 0-2 parts of stabilizer; wherein the conductive metal powder is nickel powder, zinc powder, silver powder, gold powder or a blend of the nickel powder, the zinc powder, the silver powder and the gold powder in any weight ratio. The electric power compound grease has high dropping point temperature and good adhesiveness, but has higher resistivity and poor conductivity.
CN102768873a discloses a conductive grease and a preparation method thereof, wherein the conductive grease comprises the following components: 5 to 15 percent of lithium soap, 60 to 70 percent of synthetic base oil, 23 to 33 percent of pure copper powder, 1 to 2 percent of tin powder and 1 to 2 percent of silver powder. The conductive grease has galvanic corrosion resistance and heat resistance, but also has higher conductivity and poorer heat resistance.
CN108624226a discloses a graphene electric power composite grease and a preparation method thereof, the graphene electric power composite grease comprises: 0.3 to 1.0 part of modified graphene, 29 to 45 parts of modified nano copper powder, 10 to 24 parts of modified nano silver powder, 70 to 120 parts of methyl phenyl silicone oil, 0.5 to 1.5 parts of antioxidant and 0.3 to 5.0 parts of stabilizer; the graphene electric power composite grease has good ultraviolet aging resistance, heat aging resistance and high and low temperature resistance, but the addition amount of metal powder in the product is large, and the volume resistivity is higher.
Meanwhile, the electrical connection joint of the high-voltage power transmission and transformation equipment has the common abnormal overheat phenomenon, the main heating part is a wire clamp and a wiring board of a wire and a contact of a disconnecting switch, the heating defect becomes a system problem, particularly in the south of China, the damp and hot climate causes severe environments such as high temperature, high humidity, high salt fog and the like, the heating phenomenon of the joint of the high-voltage power transmission and transformation equipment is more obvious, the formation of an oxide film in a contact area is accelerated at high temperature, the separation of a contact surface is caused, the conductive function of the joint is reduced or even fails, the current carrying capacity of the equipment is seriously influenced, and the electric energy and electric signal transmission is unstable or even the operation is stopped.
Therefore, in order to solve the above-mentioned technical problems and to ensure the operational reliability of the high-voltage conductive device, it is necessary to develop a conductor protective grease having excellent thermal stability and conductivity.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a conductor protection grease, a preparation method and application thereof, wherein the conductor protection grease adopts methyl phenyl silicone oil as base oil, and carbon black and boron nitride are added as additives, so that the heat conduction performance and the electric conduction performance of the conductor protection grease are effectively improved, the problem of unstable power equipment caused by heating due to low heat conductivity in use is avoided, and the conductor protection grease is further suitable for being used in an electric connector of high-voltage power transmission and transformation equipment.
To achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, the present invention provides a conductor protective grease comprising methyl phenyl silicone oil, carbon black, and boron nitride.
The conductor protection grease provided by the invention comprises the combination of methyl phenyl silicone oil, carbon black and boron nitride, and the three components are matched, so that the obtained conductor protection grease has excellent heat resistance and conductivity, and the specific analysis is as follows:
according to the invention, the methylphenyl silicone oil is selected as the base oil, the methylphenyl silicone oil is a composite silicone oil with phenyl groups introduced into the molecular chain of the dimethyl siloxane, the thermal stability of the methylphenyl silicone oil is obviously superior to that of soap-based grease (including aluminum-based grease and lithium-based grease) and other dimethyl silicone oils, and the methylphenyl silicone oil has excellent high temperature resistance, moist heat resistance and salt spray resistance, so that the conductor protection grease adopting the methylphenyl silicone oil as the base oil does not crack at a high temperature of 200 ℃, the stable operation of electric equipment is ensured, and meanwhile, the methylphenyl silicone oil can keep good elasticity at a low temperature, so that the conductor protection grease has a wider use temperature.
In the second aspect, the carbon black is matched with the carbon black as the conductive filler, the carbon black and the methyl phenyl silicone oil have good compatibility, so that the problem that the conductivity of the conductive protection grease is reduced due to the fact that conductive particles are separated from a body when the conductive protection grease is used is avoided, the carbon black also has excellent conductivity and oxidation resistance, the conductive protection grease is free from oxidation corrosion under a salt spray environment and a hot oxygen environment, and a series of problems that the conductive particles in the electric composite grease are seriously oxidized under the salt spray environment due to the fact that the conductive particles are used as the conductive particles, a path cannot be provided for current, abnormal heating and the like of a conductive loop are caused are avoided.
In the third aspect, the invention is further matched with the addition of boron nitride, the boron nitride has extremely high heat conductivity, the heat conductivity coefficient of the conductor protective grease can be improved, the heat conductivity of the conductor protective grease is further improved, and the problems of unstable electric signals and even shutdown faults caused by too high temperature of the high-voltage conductive joint due to too low heat conductivity in the use process of the conductor protective grease are avoided.
In summary, the conductor protection grease provided by the invention has excellent high temperature resistance, salt fog resistance, wet heat resistance, thermal oxidation aging resistance and conductivity through the combination of the methylphenyl silicone oil, the carbon black and the boron nitride, so that the conductor protection grease has wide service temperature (-50-250 ℃) and ideal performance at extremely low or extremely high temperature, and is further suitable for being used in electric connection joints of high-voltage power transmission and transformation equipment, in particular to high-voltage power transmission and transformation equipment in southern areas.
Preferably, the mass ratio of the methylphenyl silicone oil to the carbon black is 100 (5-15), such as 100:6, 100:7, 100:8, 100:9, 100:10, 100:11, 100:12, 100:13 or 100:14.
As the preferable technical scheme of the invention, the mass ratio of the methyl phenyl silicone oil to the carbon black is defined as 100, (5-15) can ensure that the obtained conductor protection grease has excellent heat resistance and electric conductivity, on one hand, if the addition amount of the carbon black is lower than the range, the electric conductivity can not meet the requirement; on the other hand, if the amount of carbon black is higher than the above range, redundancy may be caused, affecting dispersibility.
Preferably, the carbon black has a particle size of 18 to 30nm, for example 20nm, 22nm, 24nm, 26nm or 28nm, etc.
Preferably, the mass ratio of the methylphenyl silicone oil to the boron nitride is 100 (4-8), such as 100:4.5, 100:5, 100:5.5, 100:6, 100:6.5, 100:7 or 100:7.5, etc.
As the preferable technical scheme of the invention, the mass ratio of the methylphenyl silicone oil to the boron nitride is defined as 100, (4-8) the obtained conductor protection grease can be ensured to have excellent heat resistance and electric conductivity, on one hand, if the addition amount of the boron nitride is lower than the range, the thermal conductivity can not meet the requirement; on the other hand, if the amount of boron nitride added is above the above range, redundancy may result, affecting dispersibility.
In a second aspect, the present invention provides a method for producing the conductor protective grease according to the first aspect, the method comprising the steps of:
(1) Mixing methyl phenyl silicone oil and carbon black, and performing ultrasonic treatment to obtain a mixture;
(2) And (3) mixing and grinding the boron nitride and the mixture obtained in the step (1) to obtain the conductor protection grease.
Preferably, the mixing time in step (1) is 5-10 min, such as 5.5min, 6min, 6.5min, 7min, 7.5min, 8min, 8.5min, 9min or 9.5min, and the specific point values between the above point values, are limited in length and for brevity, the invention is not exhaustive list of the specific point values comprised in the range.
Preferably, the temperature of the ultrasound in step (1) is 60 to 90 ℃, for example 65 ℃, 70 ℃, 75 ℃, 80 ℃, 85 ℃, or the like.
Preferably, the time of the ultrasound in the step (1) is 20-40 min, such as 22min, 24min, 26min, 28min, 30min, 32min, 34min, 36min or 38min, and the specific point values between the above point values, which are limited in space and for simplicity, the present invention does not exhaustively list the specific point values included in the range.
Preferably, the temperature of the mixing in step (2) is 60 to 90 ℃, for example 65 ℃, 70 ℃, 75 ℃, 80 ℃ or 85 ℃, and the specific values between the above values are, for reasons of space and for reasons of simplicity, not intended to be exhaustive of the specific values comprised by the range.
Preferably, the mixing of step (2) is performed under ultrasound conditions.
Preferably, the mixing time in step (2) is 20-40 min, such as 22min, 24min, 26min, 28min, 30min, 32min, 34min, 36min or 38min, and the specific point values between the above point values, which are limited in space and for brevity, the present invention is not exhaustive.
Preferably, the grinding of step (2) is carried out in a three-roll mill.
In a third aspect, the invention provides a use of a conductor protection grease according to the first aspect in an electrical device.
Preferably, the power equipment is high voltage power transmission equipment.
Preferably, the application includes the location of electrical connection terminals for high voltage power transmission and transformation equipment, in particular clamps and terminal blocks for wires and disconnector contacts.
Compared with the prior art, the invention has the following beneficial effects:
the conductor protection grease provided by the invention comprises the combination of methyl phenyl silicone oil, carbon black and boron nitride, and the methyl phenyl silicone oil is selected as base oil, so that the excellent thermal stability of the methyl phenyl silicone oil is utilized, and the carbon black and the boron nitride are matched, so that the finally obtained conductor protection grease has excellent high temperature resistance, salt fog resistance, wet heat resistance, thermal oxidation aging resistance and higher conductivity, further has wider use temperature (-50-250 ℃), and is suitable for being used in electric connection joints of high-voltage power transmission and transformation equipment, in particular to high-voltage power transmission and transformation equipment in southern areas.
Detailed Description
The technical scheme of the invention is further described by the following specific embodiments. It will be apparent to those skilled in the art that the examples are merely to aid in understanding the invention and are not to be construed as a specific limitation thereof.
The part of raw material information related to the detailed description of the invention is as follows:
methyl phenyl silicone oil: from Dow Corning corporation under the trademark DC556;
dimethicone: from Dow Corning company, with the brand name PMX-200;
lithium-based grease: is derived from great wall lubricating oil, and the brand is Shang Bo # 00.
Examples 1 to 7 and comparative examples 1 to 5
A conductor protective grease comprises the components and the amounts of the components are shown in a table 1, and the unit of the amounts of the components is "parts by weight":
TABLE 1
The preparation methods of the conductor protective grease provided in examples 1 to 7 and comparative examples 1 to 5 include the following steps:
(1) Mixing base oil and conductive filler for 10min, placing in an ultrasonic dispersing device, and performing ultrasonic dispersion at 65deg.C for 30min to obtain a mixture;
(2) Adding boron nitride into the mixture obtained in the step (1), continuously dispersing for 30min at 65 ℃, cooling to room temperature, and grinding for 3 times by using a three-roller grinder, wherein each grinding is carried out for 30min, thus obtaining the conductor protective grease.
Performance test:
(1) Cold state access resistance: coating conductor protective grease on the contact surface of two plates, wherein the coating thickness is 0.2mm, fastening other positions of the two plates by bolts, measuring the contact resistance of a loop resistance meter by adopting a 100A current automatic measurement mode, measuring each contact point for five times, and taking an average value as a cold state contact resistance;
(2) Thermal oxidative aging resistance: heating the electric power compound grease in an oven, setting the environmental temperature of the oven to 200 ℃, and taking out samples at intervals to measure and observe quality and morphology change, wherein the aging time of the samples is 30 days; it is preferable if the appearance of the sample is substantially unchanged, with no or only a small amount of precipitation; if the sample has hardening and solidification phenomena, the flowing property is reduced, or boron nitride precipitation, copper green formed by oxidation of copper powder and zinc oxide formed by oxidation of zinc powder are poor;
(3) Salt spray resistance: the method is carried out in a salt fog aging box, salt solution is prepared by sodium chloride (analytically pure) and distilled water, the concentration of the salt solution is 5wt%, the sample aging time is 30 days, and samples are taken out at intervals to measure and observe quality and morphology changes; it is preferable if the appearance of the sample is substantially unchanged and no or only a small amount of precipitation occurs; poor results were obtained if the surface of the sample had conductive carbon black precipitated, copper green formed by oxidation of copper powder, or zinc oxide formed by zinc powder.
The conductor protective greases provided in examples 1 to 7 and comparative examples 1 to 5 were tested according to the test methods described above, and the test results are shown in table 2:
TABLE 2
From the data in table 2, it can be seen that:
the cold state access resistance of the conductor protective grease obtained in examples 1 to 5 after coating is 12.2 to 12.6 mu omega, and the thermal oxidative aging resistance and the salt spray resistance are good.
In the conductor protective grease obtained in example 6, since the added amount of boron nitride was relatively low, hardening and solidification occurred after the thermo-oxidative aging and salt spray test, and the composite grease drooling was reduced.
The relatively large amount of boron nitride added to the conductor protective grease obtained in example 7 resulted in thermal oxidative aging resistance and precipitation of boron nitride after salt spray testing.
In comparative example 1, methyl silicone oil was replaced with dimethyl silicone oil, and in comparative example 2, methyl phenyl silicone oil was replaced with lithium-based grease, which resulted in the final conductor protective grease exhibiting a curing tendency after thermo-oxidative aging and salt spray testing, and reduced sagging.
Comparative example 3a conductor protective grease obtained by replacing carbon black with copper powder showed a verdigris formed by oxidation of copper powder after thermo-oxidative aging resistance and salt spray test.
Comparative example 4 conductor protective grease obtained by replacing carbon black with zinc powder showed zinc oxide formed by oxidation of zinc powder after thermo-oxidative aging resistance and salt spray test.
The comparative example 5 was free of boron nitride and was also free of hardening and solidification after the thermal oxidative aging resistance and the salt spray test, and the sagging property was greatly reduced.
The applicant states that the present invention is described by way of the above examples as a conductor protective grease and a method of preparing and using the same, but the present invention is not limited to the above examples, i.e. it is not meant that the present invention must be practiced in dependence upon the above examples. It should be apparent to those skilled in the art that any modification of the present invention, equivalent substitution of raw materials for the product of the present invention, addition of auxiliary components, selection of specific modes, etc., falls within the scope of the present invention and the scope of disclosure.
Claims (10)
1. A conductor protective grease, characterized in that the conductor protective grease comprises a combination of methyl phenyl silicone oil, carbon black and boron nitride.
2. The protective resin for conductors according to claim 1, wherein the mass ratio of the methylphenyl silicone oil to the carbon black is 100 (5 to 15).
3. The conductor protective grease according to claim 1 or 2, wherein the carbon black has a particle diameter of 18 to 30nm.
4. The protective resin for a conductor according to any one of claims 1 to 3, wherein the mass ratio of the methylphenyl silicone oil to the boron nitride is 100 (4 to 8).
5. A method for producing the conductor protective fat according to any one of claims 1 to 4, comprising the steps of:
(1) Mixing methyl phenyl silicone oil and carbon black, and performing ultrasonic treatment to obtain a mixture;
(2) And (3) mixing and grinding the boron nitride and the mixture obtained in the step (1) to obtain the conductor protection grease.
6. The method according to claim 5, wherein the mixing time in the step (1) is 5 to 10 minutes.
7. The method of claim 5 or 6, wherein the temperature of the ultrasound in step (1) is 60-90 ℃;
preferably, the time of the ultrasonic treatment in the step (1) is 20-40 min.
8. The method according to any one of claims 5 to 7, wherein the temperature of the mixing in step (2) is 60 to 90 ℃;
preferably, the mixing of step (2) is performed under ultrasound conditions;
preferably, the mixing time in the step (2) is 20-40 min;
preferably, the grinding of step (2) is carried out in a three-roll mill.
9. Use of a conductor protection fat as claimed in any one of claims 1 to 4 in an electrical device.
10. The use according to claim 9, wherein the electrical equipment is high voltage power transmission equipment;
preferably, the application comprises application in an electrical connection terminal of a high voltage power transmission and transformation device.
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| CN202310607173.9A CN116622286B (en) | 2023-05-26 | 2023-05-26 | Conductor protective grease and preparation method and application thereof |
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| CN116622286B (en) | 2024-08-30 |
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