CN108250722B - Corrosion-resistant grounding resistance-reducing connecting fitting - Google Patents
Corrosion-resistant grounding resistance-reducing connecting fitting Download PDFInfo
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- CN108250722B CN108250722B CN201810019326.7A CN201810019326A CN108250722B CN 108250722 B CN108250722 B CN 108250722B CN 201810019326 A CN201810019326 A CN 201810019326A CN 108250722 B CN108250722 B CN 108250722B
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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
- C08L75/00—Compositions of polyureas or polyurethanes; Compositions of derivatives of such polymers
- C08L75/04—Polyurethanes
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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
- C09D5/24—Electrically-conducting paints
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/02—Contact members
- H01R13/03—Contact members characterised by the material, e.g. plating, or coating materials
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/58—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation characterised by the form or material of the contacting members
- H01R4/66—Connections with the terrestrial mass, e.g. earth plate, earth pin
Abstract
The invention discloses a corrosion-resistant grounding resistance-reducing connecting fitting which comprises a metal conductive core, a transition conductive coating coated on the metal conductive core, a conductive protection woven mesh outside the transition conductive coating and an insulating protection layer outside the conductive protection woven mesh; the insulation protective layer comprises an inner protective layer, an outer protective layer, and an inner protective layer and an outer protective layer anti-corrosion isolation layer; the anti-corrosion isolation layer is internally provided with a wave-shaped support body which supports the inner protection layer and the outer protection layer for a certain distance, and the anti-corrosion isolation layer is filled with the anti-corrosion composition. According to the scheme, the metal conductive core is specially treated, so that the conductivity, corrosion resistance and strength of the metal conductive core are enhanced, and the transition conductive coating is coated on the outer surface of the metal conductive core, so that the grounding resistance reduction effect is improved; the thermal expansion coefficient of the connecting fittings is lower than that of common metal conductors such as copper, iron and the like, the safe use of the connecting fittings in grounding operation is ensured, and the service life is long.
Description
Technical Field
The invention belongs to the technical field of lightning protection systems, and particularly relates to a corrosion-resistant grounding resistance-reducing connecting fitting.
Background
The grounding system is an important link of the whole lightning protection system, and connects the skynet and the grounding grid, so that the discharge rate of the grounding grid is integrally improved. Lightning protection grounding system mainly relies on ground connection to fall to hinder connecting fittings and is connected it net with the earth mat, and current ground falls to hinder and connects generally for the metal material, and long-term the use is easily corroded, unable normal use, and causes the safety problem, consequently need fall to hinder connecting fittings's material composition and structure to ground and improve to reach safe in utilization, and long service life's purpose.
The metal composite material is formed by utilizing a composite technology or realizing metallurgical bonding of a plurality of metals with different chemical and mechanical properties on an interface, and greatly improves various properties of a single metal material, such as thermal expansibility, strength, fracture toughness, impact toughness, wear resistance, electrical property, magnetic property and the like, so that the metal composite material is widely applied to the industrial fields of petroleum, chemical engineering, ships, metallurgy, mines, mechanical manufacture, electric power, water conservancy, traffic, environmental protection, pressure container manufacture, food, brewing, pharmacy and the like. For the connection fittings of the grounding system, the connection fittings of the grounding system can be improved by using metal composite materials due to the requirements of higher strength, better conductivity, better corrosion resistance and longer service life.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to provide a grounding resistance-reducing connecting fitting which is corrosion-resistant, low in thermal expansion coefficient, high in strength and excellent in conductivity, aiming at the defects of the prior art.
The technical scheme is as follows: the invention relates to a corrosion-resistant grounding resistance-reducing connecting fitting which comprises a metal conductive core, a transition conductive coating coated on the metal conductive core, a conductive protection woven mesh outside the transition conductive coating and an insulating protection layer outside the conductive protection woven mesh; the insulation protective layer comprises an inner protective layer, an outer protective layer, and an inner protective layer and an outer protective layer anti-corrosion isolation layer; the anti-corrosion isolation layer is internally provided with a wave-shaped support body which supports the inner protection layer and the outer protection layer for a certain distance, and the anti-corrosion isolation layer is filled with the anti-corrosion composition.
Further, the anticorrosion composition comprises a solvent and a solvent, wherein the volume ratio of the solvent to the solvent is 2-4: 1 and a polytetrafluoroethylene polymer encased within the polyurethane foam.
Further, the metal conductive core is a graphene super-strong metal composite conductive core;
the transition conductive coating comprises the following components: the grounding resistance reducing agent, the adhesive, graphite, the antistatic agent and the antioxidant;
the conductive protection woven mesh is formed by weaving graphene fibers, carbon fibers and stainless steel fibers together.
Further, the transition conductive coating comprises the following components:
grounding resistance reducing agent: 20-40 parts of a solvent;
adhesive: 15-20 parts of a solvent;
graphite: 20-40 parts of a solvent;
antistatic agent: 2-5 parts;
antioxidant: 2-5 parts;
in parts by weight.
Further, the grounding resistance reducer takes the mesoporous organic silica layer as a framework, the mesoporous organic silica framework is mixed with the conductive material mixture, the mixture is stirred and vibrated, the conductive material is loaded on the mesoporous organic silica framework, then the foam material is injected, and the conductive material is uniformly dispersed in the foam material to obtain the grounding resistance reducer.
Further, the conductive material mixture comprises the following components:
in parts by weight.
Further, the preparation method of the grounding resistance reducing agent comprises the following steps:
(11) oxidizing graphene to obtain graphene oxide, dispersing the graphene oxide into deionized water, heating the system to 55-70 ℃, adding an ethanol solution of glyceryl monostearate under the conditions of ultrasonic oscillation and stirring, adding nano metal oxide, continuously stirring, and performing ultrasonic oscillation for 1-3 hours to obtain a graphene oxide-metal oxide suspension system; the system is dried after being filtered, and the graphene oxide-metal oxide and hydrogen are subjected to reduction reaction under the protection of nitrogen to prepare modified graphene, and the modified graphene is ground into powder; mixing the prepared modified graphene with sodium bentonite, a corrosion inhibitor and a stabilizer according to a specific proportion, and uniformly stirring to obtain a conductive material mixture for later use;
(12) preparing a mesoporous organic silicon dioxide layer skeleton material, placing the prepared mesoporous organic silicon dioxide layer skeleton material into a reaction bottle, heating the system to 60-70 ℃, adding glyceryl monostearate, uniformly stirring, adding the conductive material mixture prepared in the step (11), stirring, and ultrasonically oscillating for 2-3 hours;
(13) adding polyurethane diol and polyether diol into a reaction bottle, heating to 150-170 ℃ in a nitrogen environment, adding an initiator system into the system, and carrying out reduced pressure stirring reflux reaction for 3-8 hours to obtain a polyurethane material; and (3) removing the reflux system, adding the system obtained in the step (12) under the heat preservation condition, then adding sodium bicarbonate, stirring uniformly in a nitrogen environment, and stopping stirring to obtain the grounding resistance reducing agent.
Further, the preparation method of the mesoporous organic silica layer skeleton material comprises the following steps:
(21) mixing and uniformly stirring hexadecyl trimethyl ammonium chloride, ammonia water, ethanol and water according to a ratio to prepare a surfactant mixed solution, then raising the temperature of the system to 82-88 ℃, adding an organic silicon source, reducing the pressure, and stirring and reacting for 5-7 hours at the rotating speed of 200-300 r/min;
(22) and (3) putting the system in the step (21) into a nitrogen environment to reduce the pressure, and continuously stirring and reacting for 1-2 hours to obtain the mesoporous organic silicon dioxide layer skeleton material with the mesoporous aperture of 350-500 nm.
Further, the carbon fiber is polyacrylonitrile carbon fiber.
Further, the proportion of graphene fibers, carbon fibers and stainless steel fibers in the conductive protection woven mesh is 2-4: 1-2: 2 to 3.
Has the advantages that: (1) according to the scheme, the metal conductive core is specially treated, the graphene metal composite layer is deposited on the metal conductive core, the conductivity and the strength of the metal conductive core are enhanced, the transition conductive coating is coated on the outer surface of the metal conductive core, the conductive protection net is arranged outside the transition conductive coating, the compact connection between the metal conductive core and the conductive protection net is improved due to the arrangement of the transition conductive coating, and the problem that the resistance between the metal conductive core and the conductive protection net is increased due to the occurrence of a vacancy, and the grounding resistance reduction effect is further reduced is solved; (2) the transition conductive coating used in the invention has the characteristic of excellent conductivity, wherein the preparation method of the grounding resistance-reducing agent ensures the distribution uniformity of the conductive material, thereby ensuring the service life of the connecting fittings; (3) the thermal expansion coefficient of the connecting fitting prepared by the method is lower than that of common metal conductors such as copper, iron and the like, so that the safe use of the connecting fitting in grounding operation is ensured; (4) in the scheme of the invention, the insulation protective layer is specially designed, and an anti-corrosion isolation layer is arranged between the inner protective layer and the outer protective layer; the wave-shaped supporting body is arranged in the anti-corrosion isolation layer, the inner protection layer and the outer protection layer are separated by a certain distance, the anti-corrosion isolation layer is filled with the anti-corrosion composition, and the connecting fittings can have a good anti-corrosion effect and can be applied to various geologies.
Detailed Description
The technical solution of the present invention is described in detail by the following examples, but the scope of the present invention is not limited to the examples.
Example 1: a corrosion-resistant grounding resistance-reducing connecting fitting comprises a metal conductive core, a transition conductive coating coated on the metal conductive core, a conductive protection woven mesh outside the transition conductive coating and an insulating protection layer outside the conductive protection woven mesh; the insulation protective layer comprises an inner protective layer, an outer protective layer, and an inner protective layer and an outer protective layer anti-corrosion isolation layer; the anti-corrosion isolation layer is internally provided with a wave-shaped support body which is used for supporting the inner protection layer and the outer protection layer for a certain distance, and the anti-corrosion isolation layer is filled with an anti-corrosion composition; the preservative composition comprises, by volume, 3: 1 and a polytetrafluoroethylene polymer encased within the polyurethane foam.
Wherein the metal conductive core is a graphene super-strong metal composite conductive core;
the transition conductive coating comprises the following components:
grounding resistance reducing agent: 34 parts of (a);
adhesive: 18 parts of a mixture;
graphite: 40 parts of a mixture;
antistatic agent: 5 parts of a mixture;
antioxidant: 4 parts of a mixture;
counting by weight parts;
the conductive protection knitmesh is woven by graphene fibers, polyacrylonitrile carbon fibers and stainless steel fibers together, wherein the ratio of the graphene fibers to the carbon fibers to the stainless steel fibers is 4: 2: 3.
the grounding resistance reducer takes the mesoporous organic silicon dioxide layer as a framework, the mesoporous organic silicon dioxide framework is mixed with the conductive material mixture, the mixture is stirred and vibrated, the conductive material is loaded on the mesoporous organic silicon dioxide framework, then the foam material is injected, and the conductive material is uniformly dispersed in the foam material to obtain the grounding resistance reducer.
The conductive material mixture comprises the following components:
in parts by weight.
The preparation method of the grounding resistance-reducing agent comprises the following steps:
(11) oxidizing graphene to obtain graphene oxide, dispersing the graphene oxide into deionized water, heating the system to 60 ℃, adding an ethanol solution of glyceryl monostearate under the conditions of ultrasonic oscillation and stirring, adding nano metal oxide, continuously stirring, and performing ultrasonic oscillation for 2 hours to obtain a graphene oxide-metal oxide suspension system; the system is dried after being filtered, and the graphene oxide-metal oxide and hydrogen are subjected to reduction reaction under the protection of nitrogen to prepare modified graphene, and the modified graphene is ground into powder; mixing the prepared modified graphene with sodium bentonite, a corrosion inhibitor and a stabilizer according to a specific proportion, and uniformly stirring to obtain a conductive material mixture for later use;
(12) preparing a mesoporous organic silicon dioxide layer skeleton material, placing the prepared mesoporous organic silicon dioxide layer skeleton material into a reaction bottle, heating the system to 65 ℃, adding glyceryl monostearate, uniformly stirring, adding the conductive material mixture prepared in the step (11), stirring, and ultrasonically oscillating for 2.5 hours;
(13) adding polyurethane diol and polyether diol into a reaction bottle, heating to 160 ℃ in a nitrogen environment, adding an initiator system into the system, and carrying out reduced pressure stirring reflux reaction for 6 hours to obtain a polyurethane material; and (3) removing the reflux system, adding the system obtained in the step (12) under the heat preservation condition, then adding sodium bicarbonate, stirring uniformly in a nitrogen environment, and stopping stirring to obtain the grounding resistance reducing agent.
The preparation method of the mesoporous organic silicon dioxide layer skeleton material comprises the following steps:
(21) mixing hexadecyl trimethyl ammonium chloride, ammonia water, ethanol and water according to a proportion, uniformly stirring to prepare a surfactant mixed solution, then raising the temperature of the system to 85 ℃, adding an organic silicon source, reducing the pressure, and stirring and reacting for 6 hours at the rotating speed of 240 r/min;
(22) and (3) putting the system in the step (21) into a nitrogen environment to reduce the pressure, and continuously stirring for reacting for 1.5 hours to prepare the mesoporous organic silicon dioxide layer skeleton material with the mesoporous aperture of 450-500 nm.
The lead prepared by the method has the advantages that the corrosion resistance, the strength and the service life of the connecting fitting are improved while the good conductive effect is ensured, the strength of the connecting fitting obtained in the embodiment is 1.35GPa, the resistivity is 18.5 × 10-8。
Example 2: a corrosion-resistant grounding resistance-reducing connecting fitting comprises a metal conductive core, a transition conductive coating coated on the metal conductive core, a conductive protection woven mesh outside the transition conductive coating and an insulating protection layer outside the conductive protection woven mesh; the insulation protective layer comprises an inner protective layer, an outer protective layer, and an inner protective layer and an outer protective layer anti-corrosion isolation layer; the anti-corrosion isolation layer is internally provided with a wave-shaped support body which is used for supporting the inner protection layer and the outer protection layer for a certain distance, and the anti-corrosion isolation layer is filled with an anti-corrosion composition; the preservative composition comprises, by volume, 2: 1 and a polytetrafluoroethylene polymer encased within the polyurethane foam.
Wherein the metal conductive core is a graphene super-strong metal composite conductive core;
the transition conductive coating comprises the following components:
grounding resistance reducing agent: 40 parts of a mixture;
adhesive: 20 parts of (1);
graphite: 34 parts of (a);
antistatic agent: 3 parts of a mixture;
antioxidant: 3 parts of a mixture;
counting by weight parts;
the conductive protection knitmesh is woven by graphene fibers, polyacrylonitrile carbon fibers and stainless steel fibers together, wherein the ratio of the graphene fibers to the carbon fibers to the stainless steel fibers is 2: 1: 2.
the grounding resistance reducer takes a mesoporous organic silicon dioxide layer as a framework, the mesoporous organic silicon dioxide framework and a conductive material mixture are mixed, stirred and vibrated, the conductive material is loaded on the mesoporous organic silicon dioxide framework, then a foaming material is injected, and the conductive material is uniformly dispersed in the foaming material to obtain the grounding resistance reducer.
The conductive material mixture comprises the following components:
in parts by weight.
The preparation method of the grounding resistance-reducing agent comprises the following steps:
(11) oxidizing graphene to obtain graphene oxide, dispersing the graphene oxide into deionized water, heating the system to 55 ℃, adding an ethanol solution of glyceryl monostearate under the conditions of ultrasonic oscillation and stirring, adding nano metal oxide, continuously stirring, and performing ultrasonic oscillation for 1h to obtain a graphene oxide-metal oxide suspension system; the system is dried after being filtered, and the graphene oxide-metal oxide and hydrogen are subjected to reduction reaction under the protection of nitrogen to prepare modified graphene, and the modified graphene is ground into powder; mixing the prepared modified graphene with sodium bentonite, a corrosion inhibitor and a stabilizer according to a specific proportion, and uniformly stirring to obtain a conductive material mixture for later use;
(12) preparing a mesoporous organic silicon dioxide layer skeleton material, placing the prepared mesoporous organic silicon dioxide layer skeleton material into a reaction bottle, heating the system to 60 ℃, adding glyceryl monostearate, uniformly stirring, adding the conductive material mixture prepared in the step (11), stirring, and ultrasonically oscillating for 2 hours;
(13) adding polyurethane diol and polyether diol into a reaction bottle, heating to 150 ℃ in a nitrogen environment, adding an initiator system into the system, and carrying out reduced pressure stirring reflux reaction for 3 hours to obtain a polyurethane material; and (3) removing the reflux system, adding the system obtained in the step (12) under the heat preservation condition, then adding sodium bicarbonate, stirring uniformly in a nitrogen environment, and stopping stirring to obtain the grounding resistance reducing agent.
The preparation method of the mesoporous organic silicon dioxide layer skeleton material comprises the following steps:
(21) mixing hexadecyl trimethyl ammonium chloride, ammonia water, ethanol and water according to a proportion, uniformly stirring to prepare a surfactant mixed solution, then raising the temperature of the system to 82 ℃, adding an organic silicon source, reducing the pressure, and stirring and reacting for 5 hours at the rotating speed of 200 r/min;
(22) and (3) putting the system in the step (21) into a nitrogen environment to reduce the pressure, and continuously stirring for reaction for 1h to prepare the mesoporous organic silicon dioxide layer skeleton material with the mesoporous diameter of 480-500 nm.
The connection fitting obtained in this example had a strength of 1.20GPa and a resistivity of 17.8 × 10-8。
Example 3: a corrosion-resistant grounding resistance-reducing connecting fitting comprises a metal conductive core, a transition conductive coating coated on the metal conductive core, a conductive protection woven mesh outside the transition conductive coating and an insulating protection layer outside the conductive protection woven mesh; the insulation protective layer comprises an inner protective layer, an outer protective layer, and an inner protective layer and an outer protective layer anti-corrosion isolation layer; the anti-corrosion isolation layer is internally provided with a wave-shaped support body which is used for supporting the inner protection layer and the outer protection layer for a certain distance, and the anti-corrosion isolation layer is filled with an anti-corrosion composition; the preservative composition comprises, by volume, 4: 1 and a polytetrafluoroethylene polymer encased within the polyurethane foam.
Wherein the metal conductive core is a graphene super-strong metal composite conductive core;
the transition conductive coating comprises the following components:
grounding resistance reducing agent: 32 parts of (1);
adhesive: 20 parts of (1);
graphite: 40 parts of a mixture;
antistatic agent: 5 parts of a mixture;
antioxidant: 3 parts of a mixture;
counting by weight parts;
the conductive protection knitmesh is woven by graphene fibers, polyacrylonitrile carbon fibers and stainless steel fibers together, wherein the ratio of the graphene fibers to the carbon fibers to the stainless steel fibers is 4: 2: 3.
the grounding resistance reducer takes a mesoporous organic silicon dioxide layer as a framework, the mesoporous organic silicon dioxide framework and a conductive material mixture are mixed, stirred and vibrated, the conductive material is loaded on the mesoporous organic silicon dioxide framework, then a foaming material is injected, and the conductive material is uniformly dispersed in the foaming material to obtain the grounding resistance reducer.
The conductive material mixture comprises the following components:
in parts by weight.
The preparation method of the grounding resistance-reducing agent comprises the following steps:
(11) oxidizing graphene to obtain graphene oxide, dispersing the graphene oxide into deionized water, heating the system to 70 ℃, adding an ethanol solution of glyceryl monostearate under the conditions of ultrasonic oscillation and stirring, adding nano metal oxide, continuously stirring, and performing ultrasonic oscillation for 3 hours to obtain a graphene oxide-metal oxide suspension system; the system is dried after being filtered, and the graphene oxide-metal oxide and hydrogen are subjected to reduction reaction under the protection of nitrogen to prepare modified graphene, and the modified graphene is ground into powder; mixing the prepared modified graphene with sodium bentonite, a corrosion inhibitor and a stabilizer according to a specific proportion, and uniformly stirring to obtain a conductive material mixture for later use;
(12) preparing a mesoporous organic silicon dioxide layer skeleton material, placing the prepared mesoporous organic silicon dioxide layer skeleton material into a reaction bottle, heating the system to 70 ℃, adding glyceryl monostearate, uniformly stirring, adding the conductive material mixture prepared in the step (11), stirring, and ultrasonically oscillating for 3 hours;
(13) adding polyurethane diol and polyether diol into a reaction bottle, heating to 170 ℃ in a nitrogen environment, adding an initiator system into the system, and carrying out reduced pressure stirring reflux reaction for 8 hours to obtain a polyurethane material; and (3) removing the reflux system, adding the system obtained in the step (12) under the heat preservation condition, then adding sodium bicarbonate, stirring uniformly in a nitrogen environment, and stopping stirring to obtain the grounding resistance reducing agent.
The preparation method of the mesoporous organic silicon dioxide layer skeleton material comprises the following steps:
(21) mixing hexadecyl trimethyl ammonium chloride, ammonia water, ethanol and water according to a proportion, uniformly stirring to prepare a surfactant mixed solution, then raising the temperature of the system to 88 ℃, adding an organic silicon source, reducing the pressure, and stirring and reacting for 7 hours at the rotating speed of 300 r/min;
(22) and (3) putting the system in the step (21) into a nitrogen environment to reduce the pressure, and continuously stirring for reaction for 2 hours to prepare the mesoporous organic silicon dioxide layer skeleton material with the mesoporous aperture of 350-400 nm.
The connection fitting obtained in this example had a strength of 1.25GPa and a resistivity of 18.1 × 10-8。
As noted above, while the present invention has been shown and described with reference to certain preferred embodiments, it is not to be construed as limited thereto. Various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (3)
1. The utility model provides a corrosion-resistant ground connection falls hinders connection fittings which characterized in that: the metal conductive fabric comprises a metal conductive core, a transition conductive coating coated on the metal conductive core, a conductive protection woven mesh outside the transition conductive coating and an insulation protection layer outside the conductive protection woven mesh; the insulation protective layer comprises an inner protective layer, an outer protective layer, and an inner protective layer and an outer protective layer anti-corrosion isolation layer; the anti-corrosion isolation layer is internally provided with a wave-shaped support body which is used for supporting the inner protection layer and the outer protection layer for a certain distance, and the anti-corrosion isolation layer is filled with an anti-corrosion composition;
the anticorrosive composition comprises 2-4 volume ratio: 1 and a polytetrafluoroethylene polymer encased within the polyurethane foam;
the metal conductive core is a graphene super-strong metal composite conductive core;
the conductive protection mesh is formed by weaving graphene fibers, carbon fibers and stainless steel fibers together;
the transition conductive coating comprises the following components:
grounding resistance reducing agent: 20-40 parts of a solvent;
adhesive: 15-20 parts of a solvent;
graphite: 20-40 parts of a solvent;
antistatic agent: 2-5 parts;
antioxidant: 2-5 parts;
counting by weight parts;
the grounding resistance reducer takes a mesoporous organic silicon dioxide layer as a framework, the mesoporous organic silicon dioxide framework is mixed with a conductive material mixture, the mixture is stirred and vibrated, the conductive material is loaded on the mesoporous organic silicon dioxide framework, then a foaming material is injected, and the conductive material is uniformly dispersed in the foaming material to obtain the grounding resistance reducer;
the conductive material mixture comprises the following components:
counting by weight parts;
the preparation method of the grounding resistance-reducing agent comprises the following steps:
(11) oxidizing graphene to obtain graphene oxide, dispersing the graphene oxide into deionized water, heating the system to 55-70 ℃, adding an ethanol solution of glyceryl monostearate under the conditions of ultrasonic oscillation and stirring, adding nano metal oxide, continuously stirring, and performing ultrasonic oscillation for 1-3 hours to obtain a graphene oxide-metal oxide suspension system; the system is dried after being filtered, and the graphene oxide-metal oxide and hydrogen are subjected to reduction reaction under the protection of nitrogen to prepare modified graphene, and the modified graphene is ground into powder; mixing the prepared modified graphene with sodium bentonite, a corrosion inhibitor and a stabilizer according to a specific proportion, and uniformly stirring to obtain a conductive material mixture for later use;
(12) preparing a mesoporous organic silicon dioxide layer skeleton material, placing the prepared mesoporous organic silicon dioxide layer skeleton material into a reaction bottle, heating the system to 60-70 ℃, adding glyceryl monostearate, uniformly stirring, adding the conductive material mixture prepared in the step (11), stirring, and ultrasonically oscillating for 2-3 hours;
(13) adding polyurethane diol and polyether diol into a reaction bottle, heating to 150-170 ℃ in a nitrogen environment, adding an initiator system into the system, and carrying out reduced pressure stirring reflux reaction for 3-8 hours to obtain a polyurethane material; removing the reflux system, adding the system obtained in the step (12) under the condition of heat preservation, then adding sodium bicarbonate, stirring uniformly in a nitrogen environment, and stopping stirring to obtain a grounding resistance reducing agent;
the preparation method of the mesoporous organic silicon dioxide layer skeleton material comprises the following steps:
(21) mixing and uniformly stirring hexadecyl trimethyl ammonium chloride, ammonia water, ethanol and water according to a ratio to prepare a surfactant mixed solution, then raising the temperature of the system to 82-88 ℃, adding an organic silicon source, reducing the pressure, and stirring and reacting for 5-7 hours at the rotating speed of 200-300 r/min;
(22) and (3) putting the system in the step (21) into a nitrogen environment to reduce the pressure, and continuously stirring and reacting for 1-2 hours to obtain the mesoporous organic silicon dioxide layer skeleton material with the mesoporous aperture of 350-500 nm.
2. The corrosion-resistant ground resistance-reducing connection fitting of claim 1, wherein: the carbon fiber is polyacrylonitrile carbon fiber.
3. The corrosion-resistant ground resistance-reducing connection fitting of claim 1, wherein: graphene fiber, carbon fiber and stainless steel fiber's ratio is 2 ~ 4 in the electrically conductive protection knitmesh: 1-2: 2 to 3.
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| CN108250722A (en) | 2018-07-06 |
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