CN115353743B - Antifouling silicone rubber insulator and preparation method thereof - Google Patents
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Abstract
The invention relates to the field of electric power facilities, in particular to an antifouling silicone rubber insulator and a preparation method thereof, wherein the antifouling silicone rubber insulator comprises a core rod, an umbrella skirt sheath and a connecting hardware fitting, and the umbrella skirt sheath comprises the following components in parts by weight: 100-120 parts of methyl vinyl silicone rubber, 30-50 parts of ethylene propylene diene monomer, 20-30 parts of fluorine-based alkyl polyether modified polysiloxane, 10-20 parts of POSS modified rare earth complex, 50-60 parts of vinyl white carbon black, 5-10 parts of metal oxide filler, 10-20 parts of glass fiber powder, 1-3 parts of stearic acid, 0.3-0.8 part of tert-butyl peroxybenzoate, 0.05-0.1 part of accelerator DPTT and 0.5-0.8 part of ethynylcyclohexanol.
Description
Technical Field
The invention relates to the field of electric power facilities, in particular to an antifouling silicone rubber insulator and a preparation method thereof.
Background
The insulator is used as a special insulating control, is arranged between conductors with different electric potentials or between the conductors and a grounding component, and can resist the action of voltage and mechanical stress. The insulator can increase creepage distance, realizes electrical insulation and mechanical fixation, and plays an important role in overhead transmission lines.
Insulators are various in types and shapes. The rubber insulator has the advantages of light weight, high mechanical strength, no measured zero value, low manufacturing cost, convenient maintenance and the like, and is widely used in China.
However, the rubber insulator is often polluted by rain, dust, bird feces and the like during outdoor operation, so that the performance of the rubber insulator is deteriorated and the service life of the rubber insulator is shortened. Therefore, the insulator needs to be frequently repaired and cleaned, which undoubtedly increases the operating cost of the electric power equipment.
Disclosure of Invention
The purpose of the invention is as follows: aiming at the technical problems, the invention provides an antifouling silicone rubber insulator and a preparation method thereof.
The adopted technical scheme is as follows:
the antifouling silicone rubber insulator comprises a core rod, an umbrella skirt sheath and a connecting hardware fitting, wherein the umbrella skirt sheath comprises the following components in parts by weight:
100-120 parts of methyl vinyl silicone rubber, 30-50 parts of ethylene propylene diene monomer, 20-30 parts of fluoroalkyl polyether modified polysiloxane, 10-20 parts of POSS modified rare earth complex, 50-60 parts of vinyl white carbon black, 5-10 parts of metal oxide filler, 10-20 parts of glass fiber powder, 1-3 parts of stearic acid, 0.3-0.8 part of tert-butyl peroxybenzoate, 0.05-0.1 part of accelerator DPTT and 0.5-0.8 part of ethynyl cyclohexanol.
Further, the umbrella skirt sheath comprises the following components in parts by weight:
110 parts of methyl vinyl silicone rubber, 32 parts of ethylene propylene diene monomer, 25 parts of fluorine-based alkyl polyether modified polysiloxane, 18 parts of POSS modified rare earth complex, 50 parts of vinyl white carbon black, 8 parts of metal oxide filler, 10 parts of glass fiber powder, 2 parts of stearic acid, 0.6 part of tert-butyl peroxybenzoate, 0.05 part of accelerator DPTT and 0.75 part of ethynyl cyclohexanol.
Furthermore, the mol content of vinyl in the methyl vinyl silicone rubber is 0.1-0.3%, and the molecular weight is 50-75 ten thousand.
Further, the preparation method of the POSS modified rare earth complex comprises the following steps:
dissolving amino POSS in THF to obtain a solution A, dissolving p-aldehyde benzoic acid in methanol to obtain a solution B, adding the solution B into the solution A, heating to perform reflux reaction for 20-28h, then performing reduced pressure distillation to remove the solvent, purifying the obtained solid to obtain an intermediate, dissolving the intermediate in THF to obtain a solution C, respectively dissolving sodium hydroxide and rare earth salt in ethanol to obtain a solution D and a solution E, sequentially adding the solution D and the solution E into the solution C, heating to perform reflux reaction for 10-15h, then performing reduced pressure distillation to remove the solvent, pulping the obtained solid with ethanol, filtering, and drying to constant weight.
Further, the amino POSS is an eight-p-aminophenyl POSS.
Further, the rare earth salt is a nitrate or chloride salt of rare earth elements of lanthanum, cerium, praseodymium, neodymium, promethium, samarium and europium.
Further, the preparation method of the vinyl white carbon black comprises the following steps:
dipping white carbon black by using an MAC surfactant, then carrying out ozone treatment, putting the white carbon black subjected to ozone treatment into styrene emulsion, stirring at 75-85 ℃, carrying out graft polymerization for a certain time, repeatedly washing the white carbon black subjected to graft polymerization by using ethanol and water, placing the white carbon black into a Soxhlet extractor, carrying out reflux extraction for 4-6h by using acetone to remove non-grafted autopolymers, and drying to constant weight.
Further, the metal oxide filler is any one or more of zinc oxide, magnesium oxide and aluminum oxide.
The invention also provides a preparation method of the antifouling silicone rubber insulator, which comprises the following steps:
adding methyl vinyl silicone rubber and ethylene propylene diene monomer rubber into an internal mixer, adding vinyl white carbon black, metal oxide filler, glass fiber powder and stearic acid in batches, uniformly stirring, reducing the pressure to below-0.07 MPa, heating to 150-180 ℃, continuously stirring for 30-60min, adding the obtained mixed rubber material into a double-roll open mill, wrapping rolls, sequentially adding fluorine-based alkyl polyether modified polysiloxane, POSS modified rare earth complex and ethynylcyclohexanol, uniformly mixing, performing thin passing for 3-5 times, adding tert-butyl peroxybenzoate and accelerator DPTT, performing thin passing for 3-5 times, discharging, standing the mixed rubber at room temperature for 24-48h, and vulcanizing.
Further, first-stage vulcanization is carried out during vulcanization, the first-stage vulcanization temperature is 140-150 ℃, the time is 200-250s, the pressure is 10-15MPa, the normal pressure and the normal temperature are recovered after the first-stage vulcanization, second-stage vulcanization is carried out, the temperature is increased to 200-220 ℃ from the normal temperature during second-stage vulcanization, the temperature is increased for 3-5h, and the temperature is kept for 15-20h at the temperature.
The invention has the beneficial effects that:
the invention provides an antifouling silicone rubber insulator, wherein methyl vinyl silicone rubber is used as a high polymer material with both organic and inorganic properties, has excellent high and low temperature resistance, weather resistance, aging resistance, low compression permanent deformation and excellent electrical insulation performance, is a preferred material for preparing rubber insulators, can obviously improve the heat resistance, cold resistance and mechanical strength of a rubber material by blending with ethylene propylene diene monomer, can improve the processability and the blending compatibility of methyl vinyl silicone rubber and ethylene propylene diene monomer by adding fluorine-based alkyl polyether modified polysiloxane, can further improve the antifouling and antifouling properties of the insulator by improving the hydrophobicity of the insulator due to the introduction of fluorine atoms, can improve the heat resistance, weather resistance and mechanical properties of the insulator by adding POSS modified rare earth complex, has good compatibility of vinyl white carbon black and matrix rubber, can synergistically reinforce the rubber insulator from both physical and chemical aspects by forming a transition layer between the white carbon black and the matrix rubber, further achieves the aim of improving the mechanical properties of the rubber insulator, has good insulation performance of the prepared antifouling silicone rubber insulator, the umbrella skirt has excellent antifouling and the antifouling function of a certain static contact angle of more than 130.
Drawings
FIG. 1 is an SEM image of a shed sheath prepared in example 1 of the present invention;
FIG. 2 is an SEM image of a shed sheath prepared in comparative example 2 of the present invention;
as can be seen from the comparison between the figures 1 and 2, the addition of the fluoroalkyl polyether modified polysiloxane is helpful for improving the compactness of the umbrella skirt sheath, so that the structure is more compact and uniform.
Detailed Description
The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are conventional products which are not indicated by manufacturers and are commercially available.
Example 1:
an antifouling silicone rubber insulator comprises a core rod, an umbrella skirt sheath and a connecting hardware fitting, wherein the umbrella skirt sheath comprises the following components in parts by weight:
110 parts of methyl vinyl silicone rubber, 32 parts of ethylene propylene diene monomer, 25 parts of fluorine-based alkyl polyether modified polysiloxane, 18 parts of POSS modified rare earth complex, 50 parts of vinyl white carbon black, 8 parts of zinc oxide, 10 parts of glass fiber powder, 2 parts of stearic acid, 0.6 part of tert-butyl peroxybenzoate, 0.05 part of accelerator DPTT and 0.75 part of ethynyl cyclohexanol.
Wherein the mol content of vinyl in the methyl vinyl silicone rubber is 0.23 percent, the molecular weight is 63 ten thousand, and the methyl vinyl silicone rubber is purchased from Shenzhen Mu, science and technology Limited company.
The fluoroalkyl polyether modified polysiloxane was purchased from Aiyuta silicone oil, inc., model IOTA23350.
The preparation method of the POSS modified rare earth complex comprises the following steps:
dissolving 25.2g of octa-p-aminophenyl POSS (CAS number 518359-82-5) in 250mL of THF to obtain a solution A, dissolving 2.62g of p-aldehyde benzoic acid in 25mL of methanol to obtain a solution B, adding the solution B into the solution A, heating to reflux for 25h, distilling under reduced pressure to remove the solvent, dissolving the obtained solid in dichloromethane, concentrating under reduced pressure to remove most of dichloromethane, adding methanol to precipitate the purified product to obtain an intermediate, drying the intermediate at 70 ℃, dissolving 10g of the intermediate in 100mL of THF to obtain a solution C, dissolving 1.6g of sodium hydroxide in 160mL of ethanol to obtain a solution D, dissolving 4.34g of cerium nitrate in 133mL of ethanol to obtain a solution D and a solution E, sequentially adding the solution D and the solution E into the solution C, heating to reflux for 15h, distilling under reduced pressure to remove the solvent, pulping the obtained solid in ethanol, filtering, and drying at 70 ℃ to constant weight.
The preparation method of the vinyl white carbon black comprises the following steps:
the white carbon black is subjected to dipping treatment for 30min by using the MAC surfactant, then ozone treatment is carried out, when the ozone treatment is carried out, the white carbon black is firstly put into a cavity of equipment, the vacuum pumping is carried out, the ozone is further introduced for 4h, the vacuum pumping is further carried out, the ozone is further introduced for three times, then the white carbon black subjected to the ozone treatment is put into styrene emulsion, the graft polymerization is carried out for 5h under the stirring at the temperature of 80 ℃, the white carbon black subjected to the graft polymerization is repeatedly cleaned by ethanol and water, the white carbon black is put into a Soxhlet extractor, acetone is used for reflux extraction for 5h, non-grafted self-polymers are removed, and the white carbon black is dried to constant weight at the temperature of 70 ℃.
The preparation method of the antifouling silicone rubber insulator comprises the following steps:
adding methyl vinyl silicone rubber and ethylene propylene diene monomer rubber into an internal mixer, adding vinyl white carbon black, zinc oxide, glass fiber powder and stearic acid in batches, uniformly stirring, reducing the pressure to below-0.07 MPa, heating to 160 ℃, continuously stirring for 50min, adding the obtained mixed rubber material into a double-roll open mill, sequentially adding fluoroalkyl polyether modified polysiloxane, POSS modified rare earth complex and ethynyl cyclohexanol after roll wrapping, uniformly mixing, thinly passing for 4 times, adding tert-butyl peroxybenzoate and an accelerator DPTT, thinly passing for 5 times, discharging, standing the mixed rubber at room temperature for 24h, vulcanizing, firstly performing primary vulcanization at a primary vulcanization temperature of 150 ℃ for 250s and under a pressure of 15MPa, recovering normal pressure and normal temperature after primary vulcanization, then performing secondary vulcanization at a temperature of 210 ℃ from normal temperature, heating for 5h, and keeping the temperature for 18h.
Example 2:
an antifouling silicone rubber insulator comprises a core rod, an umbrella skirt sheath and a connecting hardware fitting, wherein the umbrella skirt sheath comprises the following components in parts by weight:
120 parts of methyl vinyl silicone rubber, 50 parts of ethylene propylene diene monomer, 30 parts of fluorine-based alkyl polyether modified polysiloxane, 20 parts of POSS modified rare earth complex, 60 parts of vinyl white carbon black, 10 parts of zinc oxide, 20 parts of glass fiber powder, 3 parts of stearic acid, 0.8 part of tert-butyl peroxybenzoate, 0.1 part of accelerator DPTT and 0.8 part of ethynyl cyclohexanol.
Wherein the mol content of vinyl in the methyl vinyl silicone rubber is 0.23 percent, the molecular weight is 63 ten thousand, and the methyl vinyl silicone rubber is purchased from Shenzhen Mu, science and technology Limited company.
The fluoroalkyl polyether modified polysiloxane was purchased from Aiyuta silicone oil, inc., model IOTA23350.
The preparation method of the POSS modified rare earth complex is the same as that of example 1.
The preparation method of the vinyl white carbon black is the same as that of example 1.
The preparation method of the antifouling silicone rubber insulator comprises the following steps:
adding methyl vinyl silicone rubber and ethylene propylene diene monomer rubber into an internal mixer, adding vinyl white carbon black, zinc oxide, glass fiber powder and stearic acid in batches, uniformly stirring, reducing the pressure to below-0.07 MPa, heating to 180 ℃, continuously stirring for 60min, adding the obtained mixed rubber material into a double-roll open mill, sequentially adding fluoroalkyl polyether modified polysiloxane, POSS modified rare earth complex and ethynyl cyclohexanol after roll wrapping, uniformly mixing, thinly passing for 5 times, adding tert-butyl peroxybenzoate and an accelerator DPTT, thinly passing for 5 times, discharging, standing the mixed rubber at room temperature for 48h, vulcanizing, firstly performing primary vulcanization at a primary vulcanization temperature of 150 ℃ for 250s and under a pressure of 15MPa, recovering normal pressure and normal temperature after primary vulcanization, then performing secondary vulcanization at a temperature of 220 ℃ from normal temperature, heating for 5h, and keeping the temperature for 20h.
Example 3:
an antifouling silicone rubber insulator comprises a core rod, an umbrella skirt sheath and a connecting hardware fitting, wherein the umbrella skirt sheath comprises the following components in parts by weight:
100 parts of methyl vinyl silicone rubber, 30 parts of ethylene propylene diene monomer, 20 parts of fluorine-based alkyl polyether modified polysiloxane, 10 parts of POSS modified rare earth complex, 50 parts of vinyl white carbon black, 5 parts of zinc oxide, 10 parts of glass fiber powder, 1 part of stearic acid, 0.3 part of tert-butyl peroxybenzoate, 0.05 part of accelerator DPTT and 0.5 part of ethynyl cyclohexanol.
Wherein the mol content of vinyl in the methyl vinyl silicone rubber is 0.23 percent, the molecular weight is 63 ten thousand, and the methyl vinyl silicone rubber is purchased from Shenzhen Mu, science and technology Limited company.
The fluoroalkyl polyether modified polysiloxane was purchased from Aiyuta silicone oil, inc., model IOTA23350.
The preparation method of the POSS modified rare earth complex is the same as that of example 1.
The preparation method of the vinyl white carbon black is the same as that of example 1.
The preparation method of the antifouling silicone rubber insulator comprises the following steps:
adding methyl vinyl silicone rubber and ethylene propylene diene monomer rubber into an internal mixer, adding vinyl white carbon black, zinc oxide, glass fiber powder and stearic acid in batches, uniformly stirring, reducing the pressure to below-0.07 MPa, heating to 150 ℃, continuously stirring for 30min, adding the obtained mixed rubber material into a double-roll open mill, sequentially adding fluoroalkyl polyether modified polysiloxane, POSS modified rare earth complex and ethynyl cyclohexanol after roll wrapping, uniformly mixing, thinly passing for 3 times, adding tert-butyl peroxybenzoate and an accelerator DPTT, thinly passing for 3 times, discharging, standing the mixed rubber at room temperature for 24h, vulcanizing, firstly performing primary vulcanization at the first vulcanization temperature of 140 ℃, for 200s and under the pressure of 10MPa, recovering normal pressure and normal temperature after primary vulcanization, then performing secondary vulcanization at the second vulcanization at the temperature of 200 ℃ from normal temperature, heating for 3h, and keeping the temperature for 15h.
Example 4:
an antifouling silicone rubber insulator comprises a core rod, an umbrella skirt sheath and a connecting hardware fitting, wherein the umbrella skirt sheath comprises the following components in parts by weight:
120 parts of methyl vinyl silicone rubber, 30 parts of ethylene propylene diene monomer, 30 parts of fluorine-based alkyl polyether modified polysiloxane, 10 parts of POSS modified rare earth complex, 60 parts of vinyl white carbon black, 5 parts of zinc oxide, 20 parts of glass fiber powder, 1 part of stearic acid, 0.8 part of tert-butyl peroxybenzoate, 0.05 part of accelerator DPTT and 0.8 part of ethynylcyclohexanol.
Wherein the mol content of vinyl in the methyl vinyl silicone rubber is 0.23 percent, the molecular weight is 63 ten thousand, and the methyl vinyl silicone rubber is purchased from Shenzhen Mu, science and technology Limited company.
The fluoroalkyl polyether modified polysiloxane was purchased from Aiyuta silicone oil, inc., model IOTA23350.
The preparation method of the POSS modified rare earth complex is the same as that of example 1.
The preparation method of the vinyl white carbon black is the same as that of example 1.
The preparation method of the antifouling silicone rubber insulator comprises the following steps:
adding methyl vinyl silicone rubber and ethylene propylene diene monomer rubber into an internal mixer, adding vinyl white carbon black, zinc oxide, glass fiber powder and stearic acid in batches, uniformly stirring, reducing the pressure to below-0.07 MPa, heating to 150 ℃, continuously stirring for 60min, adding the obtained mixed rubber material into a double-roll open mill, sequentially adding fluoroalkyl polyether modified polysiloxane, POSS modified rare earth complex and ethynyl cyclohexanol after roll wrapping, uniformly mixing, thinly passing for 3 times, adding tert-butyl peroxybenzoate and an accelerator DPTT, thinly passing for 5 times, discharging, standing the mixed rubber at room temperature for 24h, vulcanizing, firstly performing primary vulcanization at a primary vulcanization temperature of 150 ℃ for 200s under the pressure of 15MPa, recovering normal pressure and normal temperature after primary vulcanization, then performing secondary vulcanization at a secondary vulcanization at the temperature of 200 ℃ from normal temperature, heating for 5h, and keeping the temperature for 15h.
Example 5:
an antifouling silicone rubber insulator comprises a core rod, an umbrella skirt sheath and a connecting hardware fitting, wherein the umbrella skirt sheath comprises the following components in parts by weight:
100 parts of methyl vinyl silicone rubber, 50 parts of ethylene propylene diene monomer, 20 parts of fluorine-based alkyl polyether modified polysiloxane, 20 parts of POSS modified rare earth complex, 50 parts of vinyl white carbon black, 10 parts of zinc oxide, 10 parts of glass fiber powder, 3 parts of stearic acid, 0.3 part of tert-butyl peroxybenzoate, 0.1 part of accelerator DPTT and 0.5 part of ethynylcyclohexanol.
Wherein the mol content of vinyl in the methyl vinyl silicone rubber is 0.23 percent, the molecular weight is 63 ten thousand, and the methyl vinyl silicone rubber is purchased from Shenzhen Mu, science and technology Limited company.
The fluoroalkyl polyether modified polysiloxane was purchased from yota silicone oil ltd, model IOTA23350, inc.
The preparation method of the POSS modified rare earth complex is the same as that of example 1.
The preparation method of the vinyl white carbon black is the same as that of example 1.
The preparation method of the antifouling silicone rubber insulator comprises the following steps:
adding methyl vinyl silicone rubber and ethylene propylene diene monomer rubber into an internal mixer, adding vinyl white carbon black, zinc oxide, glass fiber powder and stearic acid in batches, uniformly stirring, reducing the pressure to below-0.07 MPa, heating to 180 ℃, continuously stirring for 30min, adding the obtained mixed rubber material into a double-roll open mill, sequentially adding fluoroalkyl polyether modified polysiloxane, POSS modified rare earth complex and ethynyl cyclohexanol after roll wrapping, uniformly mixing, thinly passing for 5 times, adding tert-butyl peroxybenzoate and an accelerator DPTT, thinly passing for 3 times, discharging, standing the mixed rubber at room temperature for 48h, vulcanizing, firstly performing primary vulcanization at the first-stage vulcanization temperature of 140 ℃, time of 250s and pressure of 10MPa, recovering normal pressure and normal temperature after the first-stage vulcanization, then performing secondary vulcanization at the second-stage vulcanization at the temperature of 220 ℃, heating for 3h, and keeping the temperature for 20h.
Comparative example 1:
substantially the same as in example 1, except that no ethylene-propylene-diene monomer was added.
Comparative example 2:
substantially the same as in example 1 except that no fluoroalkyl polyether modified polysiloxane was added.
Comparative example 3:
essentially the same as example 1 except that no POSS modified rare earth complex is added.
Comparative example 4:
essentially the same as in example 1, except that the rare earth complex was modified with octa-aminophenyl POSS instead of POSS.
Comparative example 5:
substantially the same as in example 1, except that the vinyl silica was replaced with white carbon black.
And (3) performance testing:
the umbrella skirt sheaths prepared in the embodiments 1-5 and the comparative examples 1-5 of the invention are used as samples for performance test;
an AG-IC20KN type electronic tensile machine of Shimadzu International trade company (Shanghai) is selected, according to GB/T528-2009, the tensile speed is 500mm/min, the distance between clamps is 80mm, the gauge length is 25mm, the tensile performance test is carried out under the standard environment of (23 +/-2) DEG C and (50 +/-10)% RH, according to GB/T529-2008, the tearing speed is 500mm/min, the distance between clamps is 50mm, and the tearing performance test is carried out under the standard environment of (23 +/-2) DEG C and (50 +/-10)% RH.
The volume resistivity of the sample was measured by applying a voltage of 500V to a SM7110 high resistance meter manufactured by Nichisu Motor Co., ltd in accordance with GB/T1692-2008.
A high-frequency Q meter of Shanghai Aiyi electronic equipment Limited is selected, and the dielectric loss factor of the sample at 1MHz is measured according to GB/T1409-2006.
The video contact angle determinator JY-82 is adopted to determine the static contact angle of the sample surface: slowly dropping 8uL of distilled water drops on the surface of a sample, adjusting the clearest image to take a picture, then testing the static contact angle of the water drops by adopting an angulometry method, selecting 3 uniform positions on the surface of each sample to test, and finally calculating the average value.
The test results are shown in table 1 below:
table 1:
as can be seen from the above table 1, the antifouling silicone rubber insulator prepared by the invention has good insulating property, the shed sheath has excellent mechanical strength, the static contact angle is not less than 130 degrees, and the antifouling silicone rubber insulator has a certain self-cleaning antifouling function.
The above examples are only intended to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (8)
1. The antifouling silicone rubber insulator comprises a core rod, an umbrella skirt sheath and a connecting hardware fitting, and is characterized in that the umbrella skirt sheath comprises the following components in parts by weight:
100-120 parts of methyl vinyl silicone rubber, 30-50 parts of ethylene propylene diene monomer, 20-30 parts of fluoroalkyl polyether modified polysiloxane, 10-20 parts of POSS modified rare earth complex, 50-60 parts of vinyl white carbon black, 5-10 parts of metal oxide filler, 10-20 parts of glass fiber powder, 1-3 parts of stearic acid, 0.3-0.8 part of tert-butyl peroxybenzoate, 0.05-0.1 part of accelerator DPTT and 0.5-0.8 part of ethynyl cyclohexanol;
the preparation method of the POSS modified rare earth complex comprises the following steps:
dissolving amino POSS in THF to obtain a solution A, dissolving p-aldehyde benzoic acid in methanol to obtain a solution B, adding the solution B into the solution A, heating to perform reflux reaction for 20-28h, then performing reduced pressure distillation to remove the solvent, purifying the obtained solid to obtain an intermediate, dissolving the intermediate in THF to obtain a solution C, respectively dissolving sodium hydroxide and rare earth salt in ethanol to obtain a solution D and a solution E, sequentially adding the solution D and the solution E into the solution C, heating to perform reflux reaction for 10-15h, then performing reduced pressure distillation to remove the solvent, pulping the obtained solid with ethanol, filtering, and drying to constant weight;
the preparation method of the vinyl white carbon black comprises the following steps:
dipping white carbon black by using an MAC surfactant, then carrying out ozone treatment, putting the white carbon black subjected to ozone treatment into styrene emulsion, stirring at 75-85 ℃, carrying out graft polymerization for a certain time, repeatedly washing the white carbon black subjected to graft polymerization by using ethanol and water, placing the white carbon black into a Soxhlet extractor, carrying out reflux extraction for 4-6h by using acetone to remove non-grafted autopolymers, and drying to constant weight.
2. The anti-fouling silicone rubber insulator according to claim 1, wherein the shed sheath comprises the following components in parts by weight:
110 parts of methyl vinyl silicone rubber, 32 parts of ethylene propylene diene monomer, 25 parts of fluorine-based alkyl polyether modified polysiloxane, 18 parts of POSS modified rare earth complex, 50 parts of vinyl white carbon black, 8 parts of metal oxide filler, 10 parts of glass fiber powder, 2 parts of stearic acid, 0.6 part of tert-butyl peroxybenzoate, 0.05 part of accelerator DPTT and 0.75 part of ethynyl cyclohexanol.
3. The anti-fouling silicone rubber insulator according to claim 1, wherein the methyl vinyl silicone rubber has a vinyl molar content of 0.1 to 0.3% and a molecular weight of 50 to 75 ten thousand.
4. The anti-fouling silicone rubber insulator of claim 1, wherein said amino POSS is an eight-p-aminophenyl POSS.
5. The antifouling silicone rubber insulator according to claim 1, wherein the rare earth salt is a nitrate or chloride salt of rare earth elements lanthanum, cerium, praseodymium, neodymium, promethium, samarium and europium.
6. The antifouling type silicone rubber insulator according to claim 1, wherein the metal oxide filler is any one or more of zinc oxide, magnesium oxide, and aluminum oxide.
7. The method for preparing the antifouling silicone rubber insulator as claimed in any of claims 1 to 6, wherein the methyl vinyl silicone rubber and the ethylene propylene diene monomer are added into an internal mixer, the vinyl white carbon black, the metal oxide filler, the glass fiber powder and the stearic acid are added in batches, after uniform stirring, the pressure is reduced to below-0.07 MPa, the temperature is raised to 150 to 180 ℃, stirring is continued for 30 to 60min, the obtained mixed rubber material is added into a two-roll open mill, the fluoro-alkyl polyether modified polysiloxane, the POSS modified rare earth complex and the ethynyl cyclohexanol are sequentially added after roll wrapping, after uniform mixing, the mixture is subjected to thin-pass for 3 to 5 times, then the tert-butyl peroxybenzoate and the accelerator DPTT are added, the mixture is subjected to thin-pass for 3 to 5 times, the sheet is removed, and after the mixed rubber material is allowed to stand at room temperature for 24 to 48 hours, vulcanization is carried out.
8. The method of claim 7, wherein the first stage vulcanization is carried out at a temperature of 140-150 ℃ for 200-250s under a pressure of 10-15MPa, the first stage vulcanization is carried out and then the normal pressure and the normal temperature are recovered, and the second stage vulcanization is carried out at a temperature of 200-220 ℃ from the normal temperature for 3-5h, and the temperature is maintained at the temperature for 15-20h.
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| CN112759936A (en) * | 2021-01-26 | 2021-05-07 | 醴陵市东方电瓷电器有限公司 | Silicone rubber umbrella skirt for extra-high voltage composite insulator and preparation method thereof |
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| CN111808429A (en) * | 2020-07-22 | 2020-10-23 | 江东金具设备有限公司 | Silicone rubber material for composite insulator and preparation method thereof |
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| CN102070907A (en) * | 2010-12-16 | 2011-05-25 | 平高集团有限公司 | Silicone rubber for composite insulator and preparation method thereof |
| CN105906950A (en) * | 2016-05-30 | 2016-08-31 | 成都硅宝科技股份有限公司 | High temperature resistant ethylene propylene rubber/silicon rubber blend and preparation method thereof |
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| CN111253687A (en) * | 2020-03-24 | 2020-06-09 | 新安天玉有机硅有限公司 | Blended rubber of silicon rubber and ethylene propylene diene monomer and preparation method thereof |
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