CN105367869A - Anti-pollution flashover superhigh voltage insulation material and preparation method thereof - Google Patents

Anti-pollution flashover superhigh voltage insulation material and preparation method thereof Download PDF

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CN105367869A
CN105367869A CN201510788229.0A CN201510788229A CN105367869A CN 105367869 A CN105367869 A CN 105367869A CN 201510788229 A CN201510788229 A CN 201510788229A CN 105367869 A CN105367869 A CN 105367869A
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nanometer
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high voltage
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CN105367869B (en
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韩爱芝
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Zhoukou Power Supply Co of State Grid Henan Electric Power Co Ltd
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Zhoukou Power Supply Co of State Grid Henan Electric Power Co Ltd
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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
    • 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
    • C08L23/06—Polyethene
    • 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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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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    • C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
    • C—CHEMISTRY; METALLURGY
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    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2207/00—Properties characterising the ingredient of the composition
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Abstract

The invention relates to an anti-pollution flashover superhigh voltage insulation material and a preparation method thereof. The material includes the following components by weight: 100 portions of low density polyethylene (LDPE), 0.5-5 portions of a room temperature vulcanized silicone rubber, 0.1-0.3 portion of nano SiO2, 0.6-4.5 portions of a mixture of nano Mg(OH)2, nano Al(OH)3 and nano strontium carbonate, 0.1-1.5 portions of a compatible agent, 0.1-1 portion of an antioxidant, and 1-5 portions of a crosslinking agent. The anti-pollution flash superhigh voltage insulation material prepared by the invention can effectively prevent the pollution flashover and restrain space charge accumulation in the cable insulation material, and has the advantages of good mechanical, electrical, thermal properties and physical properties and excellent comprehensive performance.

Description

A kind of antifouling work ultra-high voltage insulating material and preparation method thereof
Technical field
The invention belongs to electrical equipment technical field, be specifically related to a kind of antifouling work ultra-high voltage insulating material and preparation method thereof.
Background technology
In recent years, rapidly, network system running voltage grade improves constantly China's electric utility development, and network size progressively expands.Build the transport capacity that EHV transmission network significantly can promote China's electrical network, reduce the loss of long distance power transmission.Compared with alternating current techniques, HVDC Transmission Technology has that transport efficiency is high, line loss is little, regulate electric current and change that power transimission direction is convenient, investment cost is few, length by capacitive current restriction, can be used as two kinds of electrical networks tie, the advantages such as short-circuit current between trunk main and electrical network, corona wireless interference are little can be reduced.
Superelevation or UHV transmission network are skeleton and the core of the intelligent grid that national grid is being made with all strength, and higher voltage range and the safe reliability of direct-current transmission to the insulating material being widely used in electric installation propose significant challenge.High Performance Insulation material be form high pressure, extra-high voltage electric transmission and transformation equipment and networking technological core with crucial, the height of its electric property and stable voltage range and the safety being directly connected to whole power transmission network.
At present, the epoxy resin insulation material volume specific resistance of hanging net operation is on the low side, and especially under high direct voltage, electric charge gathers for a long time and causes dielectric surface flashover; Composite insulator umbrella skirt material and epoxy resin-matrix rod core interface gluing power poor, easily come unglued and destroy and cause the aging brittle failure of plug; Wastage in bulk or weight accounts for the dry type transformer of electrical network gross generation about 10%, although have employed " thin insulating " technology, even introduces the THIN COMPOSITE such as fiberglass mesh, silica powder insulation layer, but still does not solve crisp, not antifatigue and the root problem such as easy to crack; Domestic atmospheric pollution is serious, and weather condition are complicated, and the power transmission and transforming equipment pollution flashover as the No.1 formidable enemy of electric power safety protects still arduous task.
Patent of invention CN101445627A discloses a kind of high-voltage DC cable insulating material and preparation method thereof, the technical scheme that this invention adopts is, by the Low Density Polyethylene of 100 weight parts, the oxidation inhibitor of 0.1 ~ 1 weight part, the maleic anhydride of 0.5 ~ 5 weight part, put into Banbury mixer mixing, and then mixing 10 ~ 15 minutes of the linking agent adding 0.1 ~ 5 weight part, obtain high-voltage DC cable insulating material, insulating material prepared by this invention effectively can improve mechanical property and the electric property of high voltage direct current cable.Patent of invention CN103665525A discloses a kind of high-voltage DC cable insulating material, and this invention comprises: 100 parts of LDPE, 1 ~ 2 part of CPE, 0.5 ~ 1.5 part of BaTiO 3, 0.6 ~ 1.5 part of conduction potassium titanate crystal whisker, 1 ~ 2.5 part of linking agent, 0.1 ~ 0.5 part of oxidation inhibitor.The semiconduction polyolefine shielding material prepared with this material, has super-smooth surface characteristic, good physical performance, excellent combination property.But these materials well can not improve the anti-fouling flashover performance of insulating material.Therefore, development High Performance Insulation material and the pollution flashover protective capacities increasing equipment, the DC ultra-high-voltage defeated change network of, stability and high efficiency reliable to building security, promote China's transmit power level and saving resource significant.
Summary of the invention
Technical problem to be solved by this invention is, for the deficiencies in the prior art, provides a kind of and prevents pollution flashover, the ultra-high voltage insulating material improving material ageing resistance and preparation method thereof.
For solving the problems of the technologies described above, the technical solution adopted in the present invention is:
A kind of antifouling work ultra-high voltage insulating material, the component comprised and content thereof are: Low Density Polyethylene 100 weight part, room temperature vulcanized silicone rubber 0.5 ~ 5 weight part, Nano-meter SiO_2 20.1 ~ 0.3 weight part, nanometer Mg (OH) 2, nanometer Al (OH) 3with nanometer SrCO 3mixture 0.6 ~ 4.5 weight part, compatilizer 0.1 ~ 1.5 weight part, oxidation inhibitor 0.1 ~ 1 weight part, linking agent 1 ~ 5 weight part.
Preferably, the density of described Low Density Polyethylene is 0.890 ~ 0.924g/cm 3, melting index is 1.9 ~ 20g/10min.
Preferably, described room temperature vulcanized silicone rubber is single-component room-temperature-vulsilicone silicone rubber.
Preferably, described Nano-meter SiO_2 2particle diameter is 30 ~ 60nm.
Preferably, described nanometer Mg (OH) 2, nanometer Al (OH) 3with nanometer SrCO 3the particle diameter of mixture is 50 ~ 100nm, described nanometer Mg (OH) 2: nanometer Al (OH) 3: nanometer SrCO 3mass ratio be 3:3:4.
Preferably, described compatilizer is maleic anhydride grafted polyethylene or maleic anhydride inoculated polypropylene.
Preferably, described oxidation inhibitor is the one in antioxidant 1010, antioxidant 300, oxidation inhibitor BBM or antioxidant CA.
Preferably, described linking agent is di-t-butyl peroxide or dicumyl peroxide.
Present invention also offers the preparation method of above-mentioned antifouling work ultra-high voltage insulating material, comprise the following steps:
1) by 0.5 ~ 5 weight part room temperature vulcanized silicone rubber and 0.1 ~ 0.3 weight part Nano-meter SiO_2 2add in torque rheometer, at 140 ~ 180 DEG C, mix 20 ~ 35min, obtain Nano-meter SiO_2 2modified room-temperature-cured silicone rubber;
2) Nano-meter SiO_2 step 1) obtained 2modified room-temperature-cured silicone rubber, 100 weight part Low Density Polyethylenes, 0.6 ~ 4.5 weight part nanometer Mg (OH) 2, nanometer Al (OH) 3with nanometer SrCO 3mixture, the mixing 18 ~ 25min of Banbury mixer is put in 0.1 ~ 1.5 parts by weight of compatible agent, and melting temperature is 130 ~ 150 DEG C, obtains mixture;
3) in step 2) add 1 ~ 5 parts by weight of crosslinking agent, 0.1 ~ 1 weight part oxidation inhibitor successively, mixing 10 ~ 20min in Banbury mixer in the mixture that obtains, melting temperature is 130 ~ 150 DEG C, obtains mixing thing;
4) mixing thing step 3) obtained melt extrudes granulation, and temperature is 250 ~ 280 DEG C, obtains described antifouling work ultra-high voltage insulating material.
Compared with prior art, the invention has the beneficial effects as follows:
1, Low Density Polyethylene snappiness compared with high density polyethylene(HDPE) is good, compared with linear low density polyethylene, can hinder and inner to dissociate the accumulation of the electric charge formed due to foreign ion.Low Density Polyethylene has nucleator effect, reduces spherulite size, improves perfect crystalline degree, thus reduces the generation of space charge.The low-density polyethylene nano composite material prepared is compared with the mineral filler/polymer composites of routine, shelf depreciation and the withstand voltage properties of nano composite material have clear superiority, nano composite material also has significant synergistic effect, comprehensively can play the collaborative usefulness of each component.
2, room temperature vulcanized silicone rubber is the main component of conventional antifouling flash coating layer, and it has excellent electric insulating quality, hydrophobic nature and migration of hydrophobicity.Through Nano-meter SiO_2 2modified room temperature vulcanized silicone rubber performance is improved, Nano-meter SiO_2 2the dimensional stability of room temperature vulcanized silicone rubber matrix material can be improved, extend the migration of hydrophobicity life-span; Nano-meter SiO_2 2there is very large specific surface area, small molecules organosilicon can be adsorbed in room temperature vulcanized silicone rubber system, slow down its speed to surface transport, thus the hydrophobic property of organic materials can be regulated.
3, the antifouling work ultra-high voltage insulating material for preparing of the present invention, effectively can prevent pollution flashover, suppresses the space charge in cable insulation material to gather, has good mechanical property, electric property and thermal characteristics, good physical performance, excellent combination property.
Embodiment
Below in conjunction with embodiment, the present invention is further elaborated.
A kind of antifouling work ultra-high voltage insulating material, the component comprised and content thereof are: Low Density Polyethylene 100 weight part, room temperature vulcanized silicone rubber 0.5 ~ 5 weight part, Nano-meter SiO_2 20.1 ~ 0.3 weight part, nanometer Mg (OH) 2, nanometer Al (OH) 3with nanometer SrCO 3mixture 0.6 ~ 4.5 weight part, compatilizer 0.1 ~ 1.5 weight part, oxidation inhibitor 0.1 ~ 1 weight part, linking agent 1 ~ 5 weight part.
The density of described Low Density Polyethylene is preferably 0.890 ~ 0.924g/cm 3melting index is preferably 1.9 ~ 20g/10min, described melting index measures under 190 DEG C/2.16kg, Low Density Polyethylene is cable insulation or shielding common used material, high density polyethylene(HDPE) degree of crystallinity is higher, can hinder and inner to dissociate the accumulation of the electric charge formed due to foreign ion, but its snappiness is relatively poor.Linear low density polyethylene degree of crystallinity is lower, and snappiness is better, but innerly easily forms space charge and the distribution of space charge is comparatively complicated.Select Low Density Polyethylene, snappiness is good, can hinder inner to dissociate the accumulation of the electric charge formed due to foreign ion.
Described room temperature vulcanized silicone rubber is commercially available single-component room-temperature-vulsilicone silicone rubber.Room temperature vulcanized silicone rubber is the main component of conventional antifouling flash coating layer, and it has excellent electric insulating quality, hydrophobic nature and migration of hydrophobicity.
Described Nano-meter SiO_2 2particle diameter is preferably 30 ~ 60nm, Nano-meter SiO_2 2the dimensional stability of room temperature vulcanized silicone rubber matrix material can be improved, extend the migration of hydrophobicity life-span; Nano-meter SiO_2 2there is very large specific surface area, small molecules organosilicon can be adsorbed in room temperature vulcanized silicone rubber system, slow down its speed to surface transport, thus the hydrophobic property of organic materials can be regulated.
Described nanometer Mg (OH) 2, nanometer Al (OH) 3with nanometer SrCO 3the particle diameter of mixture is 50 ~ 100nm, described nanometer Mg (OH) 2: nanometer Al (OH) 3: nanometer SrCO 3mass ratio be 3:3:4, nanometer Mg (OH) 2, nanometer Al (OH) 3with nanometer SrCO 3thermostability is high, has flame retardant resistance, can improve the heat-resistant pressure-resistant performance of material.Strengthen polymkeric substance by nano-particles filled, filler and substrate contact area are large, and nanoparticle surface active centre is many, can combine closely with matrix, and consistency is better, reach the toughness reinforcing and effect that strengthens simultaneously.
Described compatilizer is preferably maleic anhydride grafted polyethylene or maleic anhydride inoculated polypropylene, and the compatilizer of maleic anhydride graft is stronger than other compatilizer polarity, and com-patibilising effect is relatively good.
Described oxidation inhibitor is preferably the one in antioxidant 1010, antioxidant 300, oxidation inhibitor BBM or antioxidant CA, and the existence of appropriate oxidation inhibitor can delay or suppress the carrying out of polymkeric substance oxidising process, thus stops the aging of polymkeric substance and extend its work-ing life.
According to the processing features of high-tension cable, described linking agent is preferably di-t-butyl peroxide or dicumyl peroxide, linking agent can make the macromole of line style or slight branched chain type be transformed into tridimensional network, improves intensity, thermotolerance, wear resistance, the solvent resistance of material.
Present invention also offers the preparation method of above-mentioned antifouling work ultra-high voltage insulating material, comprise the following steps:
1) by 0.5 ~ 5 weight part room temperature vulcanized silicone rubber and 0.1 ~ 0.3 weight part Nano-meter SiO_2 2add in torque rheometer, at 140 ~ 180 DEG C, mix 20 ~ 35min, obtain Nano-meter SiO_2 2modified room-temperature-cured silicone rubber;
2) Nano-meter SiO_2 step 1) obtained 2modified room-temperature-cured silicone rubber, 100 weight part Low Density Polyethylenes, 0.6 ~ 4.5 weight part nanometer Mg (OH) 2, nanometer Al (OH) 3with nanometer SrCO 3mixture, the mixing 18 ~ 25min of Banbury mixer is put in 0.1 ~ 1.5 parts by weight of compatible agent, and melting temperature is 130 ~ 150 DEG C, obtains mixture;
3) in step 2) add 1 ~ 5 parts by weight of crosslinking agent, 0.1 ~ 1 weight part oxidation inhibitor successively, mixing 10 ~ 20min in Banbury mixer in the mixture that obtains, melting temperature is 130 ~ 150 DEG C, obtains mixing thing;
4) mixing thing step 3) obtained melt extrudes granulation, and temperature is 250 ~ 280 DEG C, obtains described antifouling work ultra-high voltage insulating material.
Prepare nano composite material compared with the mineral filler/polymer composites of routine, shelf depreciation and the withstand voltage properties of nano composite material have clear superiority, nano composite material also has significant synergistic effect, comprehensively can play the collaborative usefulness of each component.The antifouling work ultra-high voltage insulating material of preparation, effectively can prevent pollution flashover, suppresses the space charge in cable insulation material to gather, has good mechanical property, electric property and thermal characteristics, good physical performance, excellent combination property.
Below by specific embodiment, those skilled in the art can be implemented.
Embodiment 1
A preparation method for antifouling work ultra-high voltage insulating material, comprises the following steps:
1) be the Nano-meter SiO_2 of 30 ~ 60nm by the single-component room-temperature-vulsilicone silicone rubber of 0.5 weight part and 0.1 weight part particle diameter 2add in torque rheometer, at 140 DEG C, mix 20min, obtain Nano-meter SiO_2 2modified room-temperature-cured silicone rubber;
2) Nano-meter SiO_2 step 1) obtained 2modified room-temperature-cured silicone rubber, 100 weight part density are 0.890g/cm 3, melting index is 1.9g/10min(190 DEG C/2.16kg) Low Density Polyethylene, 0.6 weight part particle diameter is the nanometer Mg (OH) of 50 ~ 100nm 2, nanometer Al (OH) 3with nanometer SrCO 3mixture (nanometer Mg (OH) 2: nanometer Al (OH) 3: nanometer SrCO 3mass ratio be 3:3:4), 0.1 parts by weight maleic anhydride grafted polyethylene puts into the mixing 18min of Banbury mixer, and melting temperature is 130 DEG C, obtains mixture;
3) in step 2) add 1 weight part di-t-butyl peroxide, 0.1 ~ 1 weight part antioxidant 1010 successively, mixing 10min in Banbury mixer in the mixture that obtains, melting temperature is 130 DEG C, obtains mixing thing;
4) mixing thing step 3) obtained melt extrudes granulation, and temperature is 250 DEG C, obtains described antifouling work ultra-high voltage insulating material.
Embodiment 2
A preparation method for antifouling work ultra-high voltage insulating material, comprises the following steps:
1) be the Nano-meter SiO_2 of 30 ~ 60nm by the single-component room-temperature-vulsilicone silicone rubber of 1.5 weight parts and 0.2 weight part particle diameter 2add in torque rheometer, at 150 DEG C, mix 25min, obtain Nano-meter SiO_2 2modified room-temperature-cured silicone rubber;
2) Nano-meter SiO_2 step 1) obtained 2modified room-temperature-cured silicone rubber, 100 weight part density are 0.890g/cm 3, melting index is 1.9g/10min(190 DEG C/2.16kg) Low Density Polyethylene, 2 weight part particle diameters are the nanometer Mg (OH) of 50 ~ 100nm 2, nanometer Al (OH) 3with nanometer SrCO 3mixture (nanometer Mg (OH) 2: nanometer Al (OH) 3: nanometer SrCO 3mass ratio be 3:3:4), 0.5 parts by weight maleic anhydride graft polypropylene puts into the mixing 20min of Banbury mixer, and melting temperature is 135 DEG C, obtains mixture;
3) in step 2) add 1.5 weight part di-t-butyl peroxides, 0.2 weight part antioxidant 300 successively, mixing 12min in Banbury mixer in the mixture that obtains, melting temperature is 135 DEG C, obtains mixing thing;
4) mixing thing step 3) obtained melt extrudes granulation, and temperature is 255 DEG C, obtains described antifouling work ultra-high voltage insulating material.
Embodiment 3
A preparation method for antifouling work ultra-high voltage insulating material, comprises the following steps:
1) be the Nano-meter SiO_2 of 30 ~ 60nm by the single-component room-temperature-vulsilicone silicone rubber of 2 weight parts and 0.3 weight part particle diameter 2add in torque rheometer, at 160 DEG C, mix 30min, obtain Nano-meter SiO_2 2modified room-temperature-cured silicone rubber;
2) Nano-meter SiO_2 step 1) obtained 2modified room-temperature-cured silicone rubber, 100 weight part density are 0.890g/cm 3, melting index is 1.9g/10min(190 DEG C/2.16kg) Low Density Polyethylene, 3.5 weight part particle diameters are the nanometer Mg (OH) of 50 ~ 100nm 2, nanometer Al (OH) 3with nanometer SrCO 3mixture (nanometer Mg (OH) 2: nanometer Al (OH) 3: nanometer SrCO 3mass ratio be 3:3:4), 0.8 parts by weight maleic anhydride grafted polyethylene puts into the mixing 21min of Banbury mixer, and melting temperature is 140 DEG C, obtains mixture;
3) in step 2) add 2 weight part dicumyl peroxides, 0.4 weight part oxidation inhibitor BBM, mixing 15min in Banbury mixer successively in the mixture that obtains, melting temperature is 140 DEG C, obtains mixing thing;
4) mixing thing step 3) obtained melt extrudes granulation, and temperature is 270 DEG C, obtains described antifouling work ultra-high voltage insulating material.
Embodiment 4
A preparation method for antifouling work ultra-high voltage insulating material, comprises the following steps:
1) be the Nano-meter SiO_2 of 30 ~ 60nm by the single-component room-temperature-vulsilicone silicone rubber of 3.5 weight parts and 0.1 weight part particle diameter 2add in torque rheometer, at 170 DEG C, mix 28min, obtain Nano-meter SiO_2 2modified room-temperature-cured silicone rubber;
2) Nano-meter SiO_2 step 1) obtained 2modified room-temperature-cured silicone rubber, 100 weight part density are 0.890g/cm 3, melting index is 1.9g/10min(190 DEG C/2.16kg) Low Density Polyethylene, 4 weight part particle diameters are the nanometer Mg (OH) of 50 ~ 100nm 2, nanometer Al (OH) 3with nanometer SrCO 3mixture (nanometer Mg (OH) 2: nanometer Al (OH) 3: nanometer SrCO 3mass ratio be 3:3:4), 1 parts by weight maleic anhydride graft polypropylene puts into the mixing 24min of Banbury mixer, and melting temperature is 145 DEG C, obtains mixture;
3) in step 2) add 4 weight part dicumyl peroxides, 0.5 weight part antioxidant CA successively, mixing 18min in Banbury mixer in the mixture that obtains, melting temperature is 145 DEG C, obtains mixing thing;
4) mixing thing step 3) obtained melt extrudes granulation, and temperature is 265 DEG C, obtains described antifouling work ultra-high voltage insulating material.
Embodiment 5
A preparation method for antifouling work ultra-high voltage insulating material, comprises the following steps:
1) be the Nano-meter SiO_2 of 30 ~ 60nm by the single-component room-temperature-vulsilicone silicone rubber of 2.5 weight parts and 0.25 weight part particle diameter 2add in torque rheometer, at 165 DEG C, mix 32min, obtain Nano-meter SiO_2 2modified room-temperature-cured silicone rubber;
2) Nano-meter SiO_2 step 1) obtained 2modified room-temperature-cured silicone rubber, 100 weight part density are 0.890g/cm 3, melting index is 1.9g/10min(190 DEG C/2.16kg) Low Density Polyethylene, 3.5 weight part particle diameters are the nanometer Mg (OH) of 50 ~ 100nm 2, nanometer Al (OH) 3with nanometer SrCO 3mixture (nanometer Mg (OH) 2: nanometer Al (OH) 3: nanometer SrCO 3mass ratio be 3:3:4), 0.9 parts by weight maleic anhydride grafted polyethylene puts into the mixing 23min of Banbury mixer, and melting temperature is 143 DEG C, obtains mixture;
3) in step 2) add 4.3 weight part dicumyl peroxides, 0.7 weight part antioxidant 300 successively, mixing 16min in Banbury mixer in the mixture that obtains, melting temperature is 143 DEG C, obtains mixing thing;
4) mixing thing step 3) obtained melt extrudes granulation, and temperature is 275 DEG C, obtains described antifouling work ultra-high voltage insulating material.
Embodiment 6
A preparation method for antifouling work ultra-high voltage insulating material, comprises the following steps:
1) be the Nano-meter SiO_2 of 30 ~ 60nm by the single-component room-temperature-vulsilicone silicone rubber of 4 weight parts and 0.3 weight part particle diameter 2add in torque rheometer, at 165 DEG C, mix 32min, obtain Nano-meter SiO_2 2modified room-temperature-cured silicone rubber;
2) Nano-meter SiO_2 step 1) obtained 2modified room-temperature-cured silicone rubber, 100 weight part density are 0.890g/cm 3, melting index is 1.9g/10min(190 DEG C/2.16kg) Low Density Polyethylene, 4.3 weight part particle diameters are the nanometer Mg (OH) of 50 ~ 100nm 2, nanometer Al (OH) 3with nanometer SrCO 3mixture (nanometer Mg (OH) 2: nanometer Al (OH) 3: nanometer SrCO 3mass ratio be 3:3:4), 1.2 parts by weight maleic anhydride grafted polyethylenes put into the mixing 23min of Banbury mixer, and melting temperature is 143 DEG C, obtains mixture;
3) in step 2) add 3.5 weight part dicumyl peroxides, 0.8 weight part antioxidant 300 successively, mixing 16min in Banbury mixer in the mixture that obtains, melting temperature is 143 DEG C, obtains mixing thing;
4) mixing thing step 3) obtained melt extrudes granulation, and temperature is 275 DEG C, obtains described antifouling work ultra-high voltage insulating material.
Embodiment 7
A preparation method for antifouling work ultra-high voltage insulating material, comprises the following steps:
1) be the Nano-meter SiO_2 of 30 ~ 60nm by the single-component room-temperature-vulsilicone silicone rubber of 4.5 weight parts and 0.15 weight part particle diameter 2add in torque rheometer, at 170 DEG C, mix 28min, obtain Nano-meter SiO_2 2modified room-temperature-cured silicone rubber;
2) Nano-meter SiO_2 step 1) obtained 2modified room-temperature-cured silicone rubber, 100 weight part density are 0.890g/cm 3, melting index is 1.9g/10min(190 DEG C/2.16kg) Low Density Polyethylene, 1 weight part particle diameter is the nanometer Mg (OH) of 50 ~ 100nm 2, nanometer Al (OH) 3with nanometer SrCO 3mixture (nanometer Mg (OH) 2: nanometer Al (OH) 3: nanometer SrCO 3mass ratio be 3:3:4), 0.6 parts by weight maleic anhydride graft polypropylene puts into the mixing 24min of Banbury mixer, and melting temperature is 145 DEG C, obtains mixture;
3) in step 2) add 2.5 weight part dicumyl peroxides, 0.7 weight part antioxidant CA successively, mixing 18min in Banbury mixer in the mixture that obtains, melting temperature is 145 DEG C, obtains mixing thing;
4) mixing thing step 3) obtained melt extrudes granulation, and temperature is 265 DEG C, obtains described antifouling work ultra-high voltage insulating material.
Embodiment 8
A preparation method for antifouling work ultra-high voltage insulating material, comprises the following steps:
1) be the Nano-meter SiO_2 of 30 ~ 60nm by the single-component room-temperature-vulsilicone silicone rubber of 5 weight parts and 0.3 weight part particle diameter 2add in torque rheometer, at 180 DEG C, mix 35min, obtain Nano-meter SiO_2 2modified room-temperature-cured silicone rubber;
2) Nano-meter SiO_2 step 1) obtained 2modified room-temperature-cured silicone rubber, 100 weight part density are 0.890g/cm 3, melting index is 1.9g/10min(190 DEG C/2.16kg) Low Density Polyethylene, 4.5 weight part particle diameters are the nanometer Mg (OH) of 50 ~ 100nm 2, nanometer Al (OH) 3with nanometer SrCO 3mixture (nanometer Mg (OH) 2: nanometer Al (OH) 3: nanometer SrCO 3mass ratio be 3:3:4), 1.5 parts by weight maleic anhydride graft polypropylenes put into the mixing 25min of Banbury mixer, and melting temperature is 150 DEG C, obtains mixture;
3) in step 2) add 5 weight part di-t-butyl peroxides, 1 weight part antioxidant CA successively, mixing 20min in Banbury mixer in the mixture that obtains, melting temperature is 150 DEG C, obtains mixing thing;
4) mixing thing step 3) obtained melt extrudes granulation, and temperature is 280 DEG C, obtains described antifouling work ultra-high voltage insulating material.
Performance test
1, the preparation of sample
The respectively granulate material 5g that obtains of Example 1 ~ 8, crosslinking temperature be 140 DEG C, under oil press pressure is the condition of 10MPa, on vulcanizing press, each obtained thickness is for then 4mm, the long sample for 3cm, wide 2.5cm are cooled to room temperature.
2, hydrophobic nature, migration of hydrophobicity test
The hydrophobic nature of insulating material represents with hydrophobic contact angle.
Test defile before contact angle, the contact angle after 1min that surface defiled, the contact angle after the 120min that defiles, refer to table 1.
Table 1 water droplet contact angle on the insulating material
As can be seen from Table 1, coat material hydrophobicity loss after pollution layer, material hydrophobicity recovery after 120min, shows that material has good migration of hydrophobicity.
3, chemical proofing
The H of 3% put into respectively by material embodiment 1 ~ 8 obtained 2sO 4, NaOH, NaCl solution soak 24h, all non-sex change, illustrates that this insulating material chemical resistance is good.
4, mechanical property
Mechanical property refers to table 2.
The mechanical property of table 2 insulating material
As known from Table 2, the space charge of the material that embodiment 1 ~ 8 obtains almost does not have, and physical and chemical index is all improved.
Above performance test can be found out, the antifouling work ultra-high voltage insulating material that the present invention prepares, effectively can prevent pollution flashover, the space charge in cable insulation material is suppressed to gather, there is good mechanical property, electric property and thermal characteristics, good physical performance, excellent combination property.

Claims (9)

1. an antifouling work ultra-high voltage insulating material, is characterized in that: the component comprised and content thereof are: Low Density Polyethylene 100 weight part, room temperature vulcanized silicone rubber 0.5 ~ 5 weight part, Nano-meter SiO_2 20.1 ~ 0.3 weight part, nanometer Mg (OH) 2, nanometer Al (OH) 3with nanometer SrCO 3mixture 0.6 ~ 4.5 weight part, compatilizer 0.1 ~ 1.5 weight part, oxidation inhibitor 0.1 ~ 1 weight part, linking agent 1 ~ 5 weight part.
2. a kind of antifouling work ultra-high voltage insulating material according to claim 1, is characterized in that: the density of described Low Density Polyethylene is 0.890 ~ 0.924g/cm 3, melting index is 1.9 ~ 20g/10min.
3. a kind of antifouling work ultra-high voltage insulating material according to claim 1, is characterized in that: described room temperature vulcanized silicone rubber is single-component room-temperature-vulsilicone silicone rubber.
4. a kind of antifouling work ultra-high voltage insulating material according to claim 1, is characterized in that: described Nano-meter SiO_2 2particle diameter is 30 ~ 60nm.
5. a kind of antifouling work ultra-high voltage insulating material according to claim 1, is characterized in that: described nanometer Mg (OH) 2, nanometer Al (OH) 3with nanometer SrCO 3the particle diameter of mixture is 50 ~ 100nm, described nanometer Mg (OH) 2: nanometer Al (OH) 3: nanometer SrCO 3mass ratio be 3:3:4.
6. a kind of antifouling work ultra-high voltage insulating material according to claim 1, is characterized in that: described compatilizer is maleic anhydride grafted polyethylene or maleic anhydride inoculated polypropylene.
7. a kind of antifouling work ultra-high voltage insulating material according to claim 1, is characterized in that: described oxidation inhibitor is the one in antioxidant 1010, antioxidant 300, oxidation inhibitor BBM or antioxidant CA.
8. a kind of antifouling work ultra-high voltage insulating material according to claim 1, is characterized in that: described linking agent is di-t-butyl peroxide or dicumyl peroxide.
9. a preparation method for the antifouling work ultra-high voltage insulating material as described in any one of claim 1 ~ 8, is characterized in that: comprise the following steps:
1) by 0.5 ~ 5 weight part room temperature vulcanized silicone rubber and 0.1 ~ 0.3 weight part Nano-meter SiO_2 2add in torque rheometer, at 140 ~ 180 DEG C, mix 20 ~ 35min, obtain Nano-meter SiO_2 2modified room-temperature-cured silicone rubber;
2) Nano-meter SiO_2 step 1) obtained 2modified room-temperature-cured silicone rubber, 100 weight part Low Density Polyethylenes, 0.6 ~ 4.5 weight part nanometer Mg (OH) 2, nanometer Al (OH) 3with nanometer SrCO 3mixture, the mixing 18 ~ 25min of Banbury mixer is put in 0.1 ~ 1.5 parts by weight of compatible agent, and melting temperature is 130 ~ 150 DEG C, obtains mixture;
3) in step 2) add 1 ~ 5 parts by weight of crosslinking agent, 0.1 ~ 1 weight part oxidation inhibitor successively, mixing 10 ~ 20min in Banbury mixer in the mixture that obtains, melting temperature is 130 ~ 150 DEG C, obtains mixing thing;
4) mixing thing step 3) obtained melt extrudes granulation, and temperature is 250 ~ 280 DEG C, obtains described antifouling work ultra-high voltage insulating material.
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CN106496741A (en) * 2016-10-26 2017-03-15 安徽伊法拉电力科技有限公司 A kind of antifouling work supertension insulant
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