CN105367869B - A kind of antifouling work super-pressure insulating materials and preparation method thereof - Google Patents

A kind of antifouling work super-pressure insulating materials and preparation method thereof Download PDF

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CN105367869B
CN105367869B CN201510788229.0A CN201510788229A CN105367869B CN 105367869 B CN105367869 B CN 105367869B CN 201510788229 A CN201510788229 A CN 201510788229A CN 105367869 B CN105367869 B CN 105367869B
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insulating materials
antifouling work
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CN105367869A (en
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韩爱芝
韩静
史宏伟
赵鹤
韩庆军
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Zhoukou Power Supply Co of State Grid Henan Electric Power Co Ltd
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    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/04—Homopolymers or copolymers of ethene
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K2201/00—Specific properties of additives
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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Abstract

The present invention relates to a kind of antifouling work super-pressure insulating materials and preparation method thereof, comprising component and its content be：The parts by weight of low density polyethylene (LDPE) 100, the parts by weight of room temperature vulcanized silicone rubber 0.5 ~ 5, Nano-meter SiO_220.1 ~ 0.3 parts by weight, nanometer Mg (OH)2, nanometer Al (OH)3With nanometer SrCO3The parts by weight of mixture 0.6 ~ 4.5, the parts by weight of compatilizer 0.1 ~ 1.5, the parts by weight of antioxidant 0.1 ~ 1, the parts by weight of crosslinking agent 1 ~ 5.Antifouling work super-pressure insulating materials prepared by the present invention, pollution flashover can be effectively prevented, suppress the space charge accumulation in cable insulation material, there is good mechanical performance, electric property and hot property, good physical performance, excellent combination property.

Description

A kind of antifouling work super-pressure insulating materials and preparation method thereof
Technical field
The invention belongs to electrical equipment technical field, and in particular to a kind of antifouling work super-pressure insulating materials and its preparation side Method.
Background technology
In recent years, China's electric utility is quickly grown, and network system working voltage grade improves constantly, and network size is progressively Expand.The conveying capacity of China's power network can significantly be lifted by building EHV transmission network, reduce long range power Transmission damage Consumption.Compared with alternating current techniques, HVDC Transmission Technology has small transfer efficiency height, line loss, regulation electric current and changes power Direction of transfer is convenient, investment cost is few, length do not limited by capacitance current, can as two kinds of power networks tie, can reduce Short circuit current between backbone and power network, the advantages that corona radio interference is small.
Superelevation or UHV transmission network are the skeleton and core for the intelligent grid that national grid is being made with all strength, higher Voltage class and direct current transportation significant challenge is proposed to the security reliability for being widely used in the insulating materials of electrical equipment. High Performance Insulation material is to form high pressure, extra-high voltage electric transmission and transformation equipment and the technological core at networking with crucial, its electric property Height and the voltage class and safety for being stably directly connected to whole power transmission network.
At present, the epoxy resin insulation material specific insulation of hanging net operation is relatively low, especially under high direct voltage, electric charge length Phase accumulation causes dielectric surface flashover；Composite insulator umbrella skirt material and epoxy resin base rod core interface gluing power are poor, destruction of easily coming unglued And cause the aging brittle failure of plug；Wastage in bulk or weight accounts for the dry-type transformer of power network gross generation 10% or so, although employing " thin absolutely Edge " technology, or even introduce fiberglass mesh, the compound thin dielectric layer such as silica flour, but still without solving crisp, not endurance and easy to crack Deng root problem；Domestic air pollution is serious, and weather conditions are complicated, the power transmission and transforming equipment pollution flashover as the No.1 formidable enemy of electric power safety Protect still arduous task.
Patent of invention CN101445627A discloses a kind of high-voltage DC cable insulating material and preparation method thereof, the invention The technical scheme of use is, by the low density polyethylene (LDPE) of 100 parts by weight, the antioxidant of 0.1 ~ 1 parts by weight, 0.5 ~ 5 parts by weight Maleic anhydride, it is put into banbury and is kneaded, the crosslinking agent for then adding 0.1 ~ 5 parts by weight is kneaded 10 ~ 15 minutes, obtains high pressure Direct current cables insulating materials, the invention prepare insulating materials can effectively improve high voltage direct current cable mechanical property and electrically Performance.Patent of invention CN103665525A discloses a kind of high-voltage DC cable insulating material, and the invention includes：100 parts of LDPE, 1 ~ 2 part of CPE, 0.5 ~ 1.5 part of BaTiO3, 0.6 ~ 1.5 part of conductive potassium titanate crystal whisker, 1 ~ 2.5 part of crosslinking agent, 0.1 ~ 0.5 part of antioxygen Agent.The semiconductive polyolefin shielding material prepared with the material, has super-smooth surface characteristic, good physical performance, combination property It is excellent.But these materials can not improve the anti-fouling flashover performance of insulating materials well.Therefore, develop High Performance Insulation material with Increase the pollution flashover protective capacities of equipment, reliable to building security, stability and high efficiency DC ultra-high-voltage is defeated, and to become network, lifting China defeated Electric horizontal and saving resource is significant.
The content of the invention
The technical problems to be solved by the invention are, in view of the shortcomings of the prior art, there is provided one kind prevents pollution flashover, carried Super-pressure insulating materials of high material ageing resistace and preparation method thereof.
In order to solve the above technical problems, the technical solution adopted in the present invention is：
A kind of antifouling work super-pressure insulating materials, comprising component and its content be：The parts by weight of low density polyethylene (LDPE) 100, The parts by weight of room temperature vulcanized silicone rubber 0.5 ~ 5, Nano-meter SiO_220.1 ~ 0.3 parts by weight, nanometer Mg (OH)2, nanometer Al (OH)3And nanometer SrCO3The parts by weight of mixture 0.6 ~ 4.5, the parts by weight of compatilizer 0.1 ~ 1.5, the parts by weight of antioxidant 0.1 ~ 1, the weight of crosslinking agent 1 ~ 5 Part.
Preferably, the density of the low density polyethylene (LDPE) is 0.890 ~ 0.924g/cm3, melt index is 1.9 ~ 20g/ 10min。
Preferably, the room temperature vulcanized silicone rubber is single-component room-temperature-vulsilicone silicone rubber.
Preferably, the Nano-meter SiO_22Particle diameter is 30 ~ 60nm.
Preferably, the nanometer Mg (OH)2, nanometer Al (OH)3With nanometer SrCO3The particle diameter of mixture is 50 ~ 100nm, institute State a nanometer Mg (OH)2：Nanometer Al (OH)3：Nanometer SrCO3Mass ratio be 3:3:4.
Preferably, the compatilizer is maleic anhydride grafted polyethylene or maleic anhydride inoculated polypropylene.
Preferably, the antioxidant is one kind in antioxidant 1010, antioxidant 300, antioxidant BBM or antioxidant CA.
Preferably, the crosslinking agent is di-t-butyl peroxide or cumyl peroxide.
Present invention also offers the preparation method of above-mentioned antifouling work super-pressure insulating materials, comprise the following steps：
1）By 0.5 ~ 5 parts by weight room temperature vulcanized silicone rubber and 0.1 ~ 0.3 parts by weight Nano-meter SiO_22Add in torque rheometer, 20 ~ 35min is mixed at 140 ~ 180 DEG C, obtains Nano-meter SiO_22Modified room-temperature-cured silicone rubber；
2）By step 1）Obtained Nano-meter SiO_22Modified room-temperature-cured silicone rubber, 100 parts by weight low density polyethylene (LDPE)s, 0.6 ~ 4.5 parts by weight nanometer Mg (OH)2, nanometer Al (OH)3With nanometer SrCO3Mixture, 0.1 ~ 1.5 parts by weight of compatible agent are put into banburying 18 ~ 25min is kneaded in machine, melting temperature is 130 ~ 150 DEG C, obtains mixed material；
3）In step 2）1 ~ 5 parts by weight of crosslinking agent, 0.1 ~ 1 parts by weight antioxidant are sequentially added in obtained mixed material, 10 ~ 20min is kneaded in banbury, melting temperature is 130 ~ 150 DEG C, obtains mixture；
4）By step 3）Obtained mixture melting extrusion is granulated, and temperature is 250 ~ 280 DEG C, obtains the antifouling work superelevation Press insulating materials.
Compared with prior art, the beneficial effects of the invention are as follows：
1st, low density polyethylene (LDPE) pliability compared with high density polyethylene (HDPE) is good, can be with compared with LLDPE Hinder internal because foreign ion dissociates the accumulation for the electric charge to be formed.Low density polyethylene (LDPE) has nucleator effect, reduces spherocrystal Size, crystallization integrity degree is improved, so as to reduce the generation of space charge.The low-density polyethylene nanometer being prepared is answered Condensation material is compared with inorganic filler/polymer composites of routine, the shelf depreciation of nano composite material and pressure-resistant performance Have a clear superiority, nano composite material also has significant cooperative effect, can integrate the collaboration efficiency for playing each component.
2nd, room temperature vulcanized silicone rubber is the main component of conventional antifouling flash coating layer, and it has excellent electric insulating quality, hated Water-based and migration of hydrophobicity.By Nano-meter SiO_22Modified room temperature vulcanized silicone rubber performance is improved, Nano-meter SiO_22It can carry The dimensional stability of high room temperature vulcanized silicone rubber composite, extend the migration of hydrophobicity life-span；Nano-meter SiO_22With very big ratio table Area, small molecule organosilicon can be adsorbed in room temperature vulcanized silicone rubber system, slow down its speed to surface migration, so as to To adjust the hydrophobic property of organic material.
3rd, the antifouling work super-pressure insulating materials that the present invention is prepared, pollution flashover can be effectively prevented, suppresses cable Space charge accumulation in insulating materials, has good mechanical performance, electric property and hot property, good physical performance, synthesis Excellent performance.
Embodiment
With reference to embodiment, the present invention is further elaborated.
A kind of antifouling work super-pressure insulating materials, comprising component and its content be：The parts by weight of low density polyethylene (LDPE) 100, The parts by weight of room temperature vulcanized silicone rubber 0.5 ~ 5, Nano-meter SiO_220.1 ~ 0.3 parts by weight, nanometer Mg (OH)2, nanometer Al (OH)3And nanometer SrCO3The parts by weight of mixture 0.6 ~ 4.5, the parts by weight of compatilizer 0.1 ~ 1.5, the parts by weight of antioxidant 0.1 ~ 1, the weight of crosslinking agent 1 ~ 5 Part.
The density of the low density polyethylene (LDPE) is preferably 0.890 ~ 0.924g/cm3, melt index is preferably 1.9 ~ 20g/ 10min, the melt index determine under 190 DEG C/2.16kg, and low density polyethylene (LDPE) is cable insulation or shields common used material, High density polyethylene (HDPE) crystallinity is higher, can hinder inside because foreign ion dissociates the accumulation for the electric charge to be formed, but its is flexible Property is relatively poor.LLDPE crystallinity is relatively low, and pliability is preferable, but internal easily formation space charge and space The distribution of electric charge is complex.From low density polyethylene (LDPE), pliability is good, and inside can be hindered to be formed because foreign ion dissociates Electric charge accumulation.
The room temperature vulcanized silicone rubber is commercially available single-component room-temperature-vulsilicone silicone rubber.Room temperature vulcanized silicone rubber is conventional antifouling The main component of coating is dodged, it has excellent electric insulating quality, hydrophobicity and migration of hydrophobicity.
The Nano-meter SiO_22Particle diameter is preferably 30 ~ 60nm, Nano-meter SiO_22Room temperature vulcanized silicone rubber composite can be improved Dimensional stability, extend the migration of hydrophobicity life-span；Nano-meter SiO_22With very big specific surface area, in room temperature vulcanized silicone rubber system Small molecule organosilicon can be adsorbed, slows down its speed to surface migration, so as to adjust the hydrophobic property of organic material.
The nanometer Mg (OH)2, nanometer Al (OH)3With nanometer SrCO3The particle diameter of mixture is 50 ~ 100nm, described Nanometer Mg (OH)2：Nanometer Al (OH)3：Nanometer SrCO3Mass ratio be 3:3:4, nanometer Mg (OH)2, nanometer Al (OH)3And nanometer SrCO3Heat endurance is high, has anti-flammability, can improve the heat-resistant pressure-resistant performance of material.Strengthened with nano-particles filled and polymerize Thing, filler and substrate contact area are big, and nanoparticle surface activated centre is more, can be combined closely with matrix, compatibility Preferably, have the function that at the same toughness reinforcing and enhancing.
The compatilizer is preferably maleic anhydride grafted polyethylene or maleic anhydride inoculated polypropylene, maleic anhydride grafting Compatilizer is stronger than other compatilizer polarity, and com-patibilising effect is relatively good.
The antioxidant is preferably one kind in antioxidant 1010, antioxidant 300, antioxidant BBM or antioxidant CA, in right amount The presence of antioxidant can delay or suppress the progress of polymer oxidizing process, so as to prevent the aging of polymer and extend its use Life-span.
According to the processing features of high-tension cable, the crosslinking agent is preferably that di-t-butyl peroxide or peroxidating two are different Propyl benzene, crosslinking agent can make line style or the macromolecular of slight branched chain type be transformed into tridimensional network, improve the intensity, resistance to of material Hot, wearability, solvent resistance.
Present invention also offers the preparation method of above-mentioned antifouling work super-pressure insulating materials, comprise the following steps：
1）By 0.5 ~ 5 parts by weight room temperature vulcanized silicone rubber and 0.1 ~ 0.3 parts by weight Nano-meter SiO_22Add in torque rheometer, 20 ~ 35min is mixed at 140 ~ 180 DEG C, obtains Nano-meter SiO_22Modified room-temperature-cured silicone rubber；
2）By step 1）Obtained Nano-meter SiO_22Modified room-temperature-cured silicone rubber, 100 parts by weight low density polyethylene (LDPE)s, 0.6 ~ 4.5 parts by weight nanometer Mg (OH)2, nanometer Al (OH)3With nanometer SrCO3Mixture, 0.1 ~ 1.5 parts by weight of compatible agent are put into banburying 18 ~ 25min is kneaded in machine, melting temperature is 130 ~ 150 DEG C, obtains mixed material；
3）In step 2）1 ~ 5 parts by weight of crosslinking agent, 0.1 ~ 1 parts by weight antioxidant are sequentially added in obtained mixed material, 10 ~ 20min is kneaded in banbury, melting temperature is 130 ~ 150 DEG C, obtains mixture；
4）By step 3）Obtained mixture melting extrusion is granulated, and temperature is 250 ~ 280 DEG C, obtains the antifouling work superelevation Press insulating materials.
Nano composite material is prepared compared with inorganic filler/polymer composites of routine, nano composite material Shelf depreciation and pressure-resistant performance have a clear superiority, nano composite material also has significant cooperative effect, can integrate hair Wave the collaboration efficiency of each component.The antifouling work super-pressure insulating materials of preparation, pollution flashover can be effectively prevented, it is exhausted to suppress cable Space charge accumulation in edge material, has good mechanical performance, electric property and a hot property, good physical performance is comprehensive Can be excellent.
Below by specific embodiment, implement those skilled in the art.
Embodiment 1
A kind of preparation method of antifouling work super-pressure insulating materials, comprises the following steps：
1）By the Nano-meter SiO_2 that the single-component room-temperature-vulsilicone silicone rubber of 0.5 parts by weight and 0.1 parts by weight particle diameter are 30 ~ 60nm2 Add in torque rheometer, mix 20min at 140 DEG C, obtain Nano-meter SiO_22Modified room-temperature-cured silicone rubber；
2）By step 1）Obtained Nano-meter SiO_22Modified room-temperature-cured silicone rubber, 100 parts by weight density are 0.890g/cm3、 Melt index is 1.9g/10min（190℃/2.16kg）Low density polyethylene (LDPE), 0.6 parts by weight particle diameter is that 50 ~ 100nm receives Rice Mg (OH)2, nanometer Al (OH)3With nanometer SrCO3Mixture（Nanometer Mg (OH)2：Nanometer Al (OH)3：Nanometer SrCO3Quality Than for 3:3:4）, 0.1 parts by weight maleic anhydride grafted polyethylene, which is put into banbury, is kneaded 18min, and melting temperature is 130 DEG C, Obtain mixed material；
3）In step 2）1 parts by weight di-t-butyl peroxide is sequentially added in obtained mixed material, 0.1 ~ 1 parts by weight resist Oxygen agent 1010,10min is kneaded in banbury, melting temperature is 130 DEG C, obtains mixture；
4）By step 3）Obtained mixture melting extrusion is granulated, and temperature is 250 DEG C, and it is exhausted to obtain the antifouling work super-pressure Edge material.
Embodiment 2
A kind of preparation method of antifouling work super-pressure insulating materials, comprises the following steps：
1）By the Nano-meter SiO_2 that the single-component room-temperature-vulsilicone silicone rubber of 1.5 parts by weight and 0.2 parts by weight particle diameter are 30 ~ 60nm2 Add in torque rheometer, mix 25min at 150 DEG C, obtain Nano-meter SiO_22Modified room-temperature-cured silicone rubber；
2）By step 1）Obtained Nano-meter SiO_22Modified room-temperature-cured silicone rubber, 100 parts by weight density are 0.890g/cm3、 Melt index is 1.9g/10min（190℃/2.16kg）Low density polyethylene (LDPE), 2 parts by weight particle diameters be 50 ~ 100nm nanometer Mg(OH)2, nanometer Al (OH)3With nanometer SrCO3Mixture（Nanometer Mg (OH)2：Nanometer Al (OH)3：Nanometer SrCO3Mass ratio For 3:3:4）, 0.5 parts by weight maleic anhydride graft polypropylene, which is put into banbury, is kneaded 20min, and melting temperature is 135 DEG C, is obtained To mixed material；
3）In step 2）1.5 parts by weight di-t-butyl peroxides are sequentially added in obtained mixed material, 0.2 parts by weight resist Oxygen agent 300,12min is kneaded in banbury, melting temperature is 135 DEG C, obtains mixture；
4）By step 3）Obtained mixture melting extrusion is granulated, and temperature is 255 DEG C, and it is exhausted to obtain the antifouling work super-pressure Edge material.
Embodiment 3
A kind of preparation method of antifouling work super-pressure insulating materials, comprises the following steps：
1）By the Nano-meter SiO_2 that the single-component room-temperature-vulsilicone silicone rubber of 2 parts by weight and 0.3 parts by weight particle diameter are 30 ~ 60nm2Add Enter in torque rheometer, mix 30min at 160 DEG C, obtain Nano-meter SiO_22Modified room-temperature-cured silicone rubber；
2）By step 1）Obtained Nano-meter SiO_22Modified room-temperature-cured silicone rubber, 100 parts by weight density are 0.890g/cm3、 Melt index is 1.9g/10min（190℃/2.16kg）Low density polyethylene (LDPE), 3.5 parts by weight particle diameters are that 50 ~ 100nm receives Rice Mg (OH)2, nanometer Al (OH)3With nanometer SrCO3Mixture（Nanometer Mg (OH)2：Nanometer Al (OH)3：Nanometer SrCO3Quality Than for 3:3:4）, 0.8 parts by weight maleic anhydride grafted polyethylene, which is put into banbury, is kneaded 21min, and melting temperature is 140 DEG C, Obtain mixed material；
3）In step 2）2 parts by weight cumyl peroxides, 0.4 parts by weight antioxygen are sequentially added in obtained mixed material Agent BBM, 15min is kneaded in banbury, melting temperature is 140 DEG C, obtains mixture；
4）By step 3）Obtained mixture melting extrusion is granulated, and temperature is 270 DEG C, and it is exhausted to obtain the antifouling work super-pressure Edge material.
Embodiment 4
A kind of preparation method of antifouling work super-pressure insulating materials, comprises the following steps：
1）By the Nano-meter SiO_2 that the single-component room-temperature-vulsilicone silicone rubber of 3.5 parts by weight and 0.1 parts by weight particle diameter are 30 ~ 60nm2 Add in torque rheometer, mix 28min at 170 DEG C, obtain Nano-meter SiO_22Modified room-temperature-cured silicone rubber；
2）By step 1）Obtained Nano-meter SiO_22Modified room-temperature-cured silicone rubber, 100 parts by weight density are 0.890g/cm3、 Melt index is 1.9g/10min（190℃/2.16kg）Low density polyethylene (LDPE), 4 parts by weight particle diameters be 50 ~ 100nm nanometer Mg(OH)2, nanometer Al (OH)3With nanometer SrCO3Mixture（Nanometer Mg (OH)2：Nanometer Al (OH)3：Nanometer SrCO3Mass ratio For 3:3:4）, 1 parts by weight maleic anhydride graft polypropylene, which is put into banbury, is kneaded 24min, and melting temperature is 145 DEG C, is obtained Mixed material；
3）In step 2）4 parts by weight cumyl peroxides, 0.5 parts by weight antioxygen are sequentially added in obtained mixed material Agent CA, 18min is kneaded in banbury, melting temperature is 145 DEG C, obtains mixture；
4）By step 3）Obtained mixture melting extrusion is granulated, and temperature is 265 DEG C, and it is exhausted to obtain the antifouling work super-pressure Edge material.
Embodiment 5
A kind of preparation method of antifouling work super-pressure insulating materials, comprises the following steps：
1）By the nanometer that the single-component room-temperature-vulsilicone silicone rubber of 2.5 parts by weight and 0.25 parts by weight particle diameter are 30 ~ 60nm SiO2Add in torque rheometer, mix 32min at 165 DEG C, obtain Nano-meter SiO_22Modified room-temperature-cured silicone rubber；
2）By step 1）Obtained Nano-meter SiO_22Modified room-temperature-cured silicone rubber, 100 parts by weight density are 0.890g/cm3、 Melt index is 1.9g/10min（190℃/2.16kg）Low density polyethylene (LDPE), 3.5 parts by weight particle diameters are that 50 ~ 100nm receives Rice Mg (OH)2, nanometer Al (OH)3With nanometer SrCO3Mixture（Nanometer Mg (OH)2：Nanometer Al (OH)3：Nanometer SrCO3Quality Than for 3:3:4）, 0.9 parts by weight maleic anhydride grafted polyethylene, which is put into banbury, is kneaded 23min, and melting temperature is 143 DEG C, Obtain mixed material；
3）In step 2）4.3 parts by weight cumyl peroxides are sequentially added in obtained mixed material, 0.7 parts by weight resist Oxygen agent 300,16min is kneaded in banbury, melting temperature is 143 DEG C, obtains mixture；
4）By step 3）Obtained mixture melting extrusion is granulated, and temperature is 275 DEG C, and it is exhausted to obtain the antifouling work super-pressure Edge material.
Embodiment 6
A kind of preparation method of antifouling work super-pressure insulating materials, comprises the following steps：
1）By the Nano-meter SiO_2 that the single-component room-temperature-vulsilicone silicone rubber of 4 parts by weight and 0.3 parts by weight particle diameter are 30 ~ 60nm2Add Enter in torque rheometer, mix 32min at 165 DEG C, obtain Nano-meter SiO_22Modified room-temperature-cured silicone rubber；
2）By step 1）Obtained Nano-meter SiO_22Modified room-temperature-cured silicone rubber, 100 parts by weight density are 0.890g/cm3、 Melt index is 1.9g/10min（190℃/2.16kg）Low density polyethylene (LDPE), 4.3 parts by weight particle diameters are that 50 ~ 100nm receives Rice Mg (OH)2, nanometer Al (OH)3With nanometer SrCO3Mixture（Nanometer Mg (OH)2：Nanometer Al (OH)3：Nanometer SrCO3Quality Than for 3:3:4）, 1.2 parts by weight maleic anhydride grafted polyethylenes, which are put into banbury, is kneaded 23min, and melting temperature is 143 DEG C, Obtain mixed material；
3）In step 2）3.5 parts by weight cumyl peroxides are sequentially added in obtained mixed material, 0.8 parts by weight resist Oxygen agent 300,16min is kneaded in banbury, melting temperature is 143 DEG C, obtains mixture；
4）By step 3）Obtained mixture melting extrusion is granulated, and temperature is 275 DEG C, and it is exhausted to obtain the antifouling work super-pressure Edge material.
Embodiment 7
A kind of preparation method of antifouling work super-pressure insulating materials, comprises the following steps：
1）By the nanometer that the single-component room-temperature-vulsilicone silicone rubber of 4.5 parts by weight and 0.15 parts by weight particle diameter are 30 ~ 60nm SiO2Add in torque rheometer, mix 28min at 170 DEG C, obtain Nano-meter SiO_22Modified room-temperature-cured silicone rubber；
2）By step 1）Obtained Nano-meter SiO_22Modified room-temperature-cured silicone rubber, 100 parts by weight density are 0.890g/cm3、 Melt index is 1.9g/10min（190℃/2.16kg）Low density polyethylene (LDPE), 1 parts by weight particle diameter be 50 ~ 100nm nanometer Mg(OH)2, nanometer Al (OH)3With nanometer SrCO3Mixture（Nanometer Mg (OH)2：Nanometer Al (OH)3：Nanometer SrCO3Mass ratio For 3:3:4）, 0.6 parts by weight maleic anhydride graft polypropylene, which is put into banbury, is kneaded 24min, and melting temperature is 145 DEG C, is obtained To mixed material；
3）In step 2）2.5 parts by weight cumyl peroxides are sequentially added in obtained mixed material, 0.7 parts by weight resist Oxygen agent CA, 18min is kneaded in banbury, melting temperature is 145 DEG C, obtains mixture；
4）By step 3）Obtained mixture melting extrusion is granulated, and temperature is 265 DEG C, and it is exhausted to obtain the antifouling work super-pressure Edge material.
Embodiment 8
A kind of preparation method of antifouling work super-pressure insulating materials, comprises the following steps：
1）By the Nano-meter SiO_2 that the single-component room-temperature-vulsilicone silicone rubber of 5 parts by weight and 0.3 parts by weight particle diameter are 30 ~ 60nm2Add Enter in torque rheometer, mix 35min at 180 DEG C, obtain Nano-meter SiO_22Modified room-temperature-cured silicone rubber；
2）By step 1）Obtained Nano-meter SiO_22Modified room-temperature-cured silicone rubber, 100 parts by weight density are 0.890g/cm3、 Melt index is 1.9g/10min（190℃/2.16kg）Low density polyethylene (LDPE), 4.5 parts by weight particle diameters are that 50 ~ 100nm receives Rice Mg (OH)2, nanometer Al (OH)3With nanometer SrCO3Mixture（Nanometer Mg (OH)2：Nanometer Al (OH)3：Nanometer SrCO3Quality Than for 3:3:4）, 1.5 parts by weight maleic anhydride graft polypropylenes, which are put into banbury, is kneaded 25min, and melting temperature is 150 DEG C, Obtain mixed material；
3）In step 2）5 parts by weight di-t-butyl peroxides, 1 parts by weight antioxidant are sequentially added in obtained mixed material CA, 20min is kneaded in banbury, melting temperature is 150 DEG C, obtains mixture；
4）By step 3）Obtained mixture melting extrusion is granulated, and temperature is 280 DEG C, and it is exhausted to obtain the antifouling work super-pressure Edge material.
Performance test
1st, the preparation of sample
The obtained granular material 5g of Example 1 ~ 8 respectively, crosslinking temperature be 140 DEG C, hydraulic press pressure be 10MPa Under conditions of, on vulcanizing press each obtained thickness be 4mm, a length of 3cm, wide 2.5cm sample be subsequently cooled to room temperature.
2nd, hydrophobicity, migration of hydrophobicity test
The hydrophobicity of insulating materials is represented with hydrophobic contact angle.
Test defile before contact angle, the contact angle after 1min that surface defiles, the contact angle after the 120min that defiles, refer to Table 1.
The contact angle of the water droplet of table 1 on the insulating material
As can be seen from Table 1, coat material hydrophobicity loss after pollution layer, material hydrophobicity recovery after 120min, show material Material has preferable migration of hydrophobicity.
3rd, chemical proofing
The material that embodiment 1 ~ 8 obtains is respectively put into 3% H2SO4, NaOH, NaCl solution immersion 24h, it is undenatured, Illustrate that the insulating materials chemical resistance is good.
4th, mechanical property
Mechanical property refers to table 2.
The mechanical property of the insulating materials of table 2
As known from Table 2, the space charge for the material that embodiment 1 ~ 8 obtains almost does not have, and physical and chemical index is carried It is high.
Above performance test can be seen that the antifouling work super-pressure insulating materials that the present invention is prepared, and can effectively prevent Only pollution flashover, suppress the space charge accumulation in cable insulation material, there is good mechanical performance, electric property and hot Can, good physical performance, excellent combination property.

Claims (7)

  1. A kind of 1. antifouling work super-pressure insulating materials, it is characterised in that：Comprising component and its content be：Low density polyethylene (LDPE) 100 parts by weight, the parts by weight of room temperature vulcanized silicone rubber 0.5 ~ 5, Nano-meter SiO_220.1 ~ 0.3 parts by weight, nanometer Mg (OH)2, nanometer Al (OH)3With nanometer SrCO3The parts by weight of mixture 0.6 ~ 4.5, the parts by weight of compatilizer 0.1 ~ 1.5, the parts by weight of antioxidant 0.1 ~ 1, crosslinking The parts by weight of agent 1 ~ 5, the density of the low density polyethylene (LDPE) is 0.890 ~ 0.924g/cm3, melt index is 1.9 ~ 20g/10min,
    The preparation method of described antifouling work super-pressure insulating materials, comprises the following steps：
    1）By 0.5 ~ 5 parts by weight room temperature vulcanized silicone rubber and 0.1 ~ 0.3 parts by weight Nano-meter SiO_22Add in torque rheometer, 140 20 ~ 35min is mixed at ~ 180 DEG C, obtains Nano-meter SiO_22Modified room-temperature-cured silicone rubber；
    2）By step 1）Obtained Nano-meter SiO_22Modified room-temperature-cured silicone rubber, 100 parts by weight low density polyethylene (LDPE)s, 0.6 ~ 4.5 weight Measure part nanometer Mg (OH)2, nanometer Al (OH)3With nanometer SrCO3Mixture, 0.1 ~ 1.5 parts by weight of compatible agent are put into banbury and mixed 18 ~ 25min is refined, melting temperature is 130 ~ 150 DEG C, obtains mixed material；
    3）In step 2）1 ~ 5 parts by weight of crosslinking agent, 0.1 ~ 1 parts by weight antioxidant are sequentially added in obtained mixed material, close 10 ~ 20min is kneaded in mill, melting temperature is 130 ~ 150 DEG C, obtains mixture；
    4）By step 3）Obtained mixture melting extrusion is granulated, and temperature is 250 ~ 280 DEG C, and it is exhausted to obtain the antifouling work super-pressure Edge material.
  2. A kind of 2. antifouling work super-pressure insulating materials according to claim 1, it is characterised in that：The room temperature vulcanization silicon rubber Glue is single-component room-temperature-vulsilicone silicone rubber.
  3. A kind of 3. antifouling work super-pressure insulating materials according to claim 1, it is characterised in that：The Nano-meter SiO_22Particle diameter For 30 ~ 60nm.
  4. A kind of 4. antifouling work super-pressure insulating materials according to claim 1, it is characterised in that：The nanometer Mg (OH)2、 Nanometer Al (OH)3With nanometer SrCO3The particle diameter of mixture is 50 ~ 100nm, the nanometer Mg (OH)2：Nanometer Al (OH)3：Nanometer SrCO3Mass ratio be 3:3:4.
  5. A kind of 5. antifouling work super-pressure insulating materials according to claim 1, it is characterised in that：The compatilizer is Malaysia Anhydride grafted lldpe or maleic anhydride inoculated polypropylene.
  6. A kind of 6. antifouling work super-pressure insulating materials according to claim 1, it is characterised in that：The antioxidant is antioxygen One kind in agent 1010, antioxidant 300, antioxidant BBM or antioxidant CA.
  7. A kind of 7. antifouling work super-pressure insulating materials according to claim 1, it is characterised in that：The crosslinking agent is peroxide Change di-t-butyl or cumyl peroxide.
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