CN103214851B - A kind of liquid silastic base conductance non-linear dielectric materials - Google Patents
A kind of liquid silastic base conductance non-linear dielectric materials Download PDFInfo
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Abstract
A kind of liquid silastic base conductance non-linear dielectric materials, it relates to a kind of rubber-based non-linear dielectric material.It will solve the problem that disruptive strength is low, physical-mechanical property is poor of existing silicone rubber based conductance Nonlinear Composite.Non-linear dielectric materials of the present invention is made up of liquid silastic and nonlinear functions filler, and nonlinear functions filler is made up of nano zine oxide, nano titanium oxide, nanometer silicon carbide, carbon nanotube, graphitized carbon black and nano-graphite.The alternating current breakdown intensity of the liquid silastic base conductance non-linear dielectric materials that the present invention obtains is not less than 30kV/mm, and maximum nonlinear factor 6 ~ 20, tensile strength is not less than 6.0MPa, and elongation at break is not less than 200%.The present invention is mainly used in high-voltage insulating compound material.
Description
Technical field
The present invention relates to a kind of rubber-based non-linear dielectric material.
Background technology
It is good that silicon rubber has electrical insulation capability, high-low temperature resistant, resistance to ozone ageing, oxygen aging, photoaging, weathering age, and hydrophobic nature is good, the advantages such as resistance to burning, is thus used widely in electric insulation field.By polymkeric substance, as polyolefine, rubber, epoxy resin etc. and some function mineral filler compound, non-linear dielectric materials can be obtained, due to non-linear dielectric materials specific conductivity or (with) specific inductivity can improve with the increase executing strength of electric field outward, conductance or (with) specific inductivity is non-linear, thus it has the ability of homogenizing electric field distribution voluntarily in inhomogeneous field, effectively can suppress the generation of space charge and the formation of electric branch and growth, significantly improve insulating property.
Existing polyolefin based non-linear matrix material be by polyolefin resin and one or more fillers blended obtained, have non-linear conductance or (with) nonlinear dielectric constant.By the impact of matrix resin polyolefine self performance, the Application Areas of polyolefin based non-linear matrix material is restricted, and cannot be applied to the occasion that some need use rubber item.
In 2009 " functional materials " the 10th phase the 40th volume " electric field treatment is on the impact of silicon carbide/polymer composites conductance property " and post-doctoral research work report " applying electricity, magnetic field in polymer-based carbon Nonlinear Composite preparation process to the impact of its performance and microtexture ", disclose silicon carbide/silicon rubber composite material have conductance non-linear character, the silicon carbide applied in its literary composition is respectively micrometer silicon carbide silicon and the nanometer silicon carbide of median size 7 μm ~ 10 μm and 20 μm ~ 30 μm.In literary composition, the minimum addition of silicon carbide is 11.1Vol%, and during calculating, the proportion of silicon carbide and liquid silastic is defined as 3.2g/cm respectively
3and 1.0g/cm
3namely, also actual formula is in 100 parts of liquid silastics, at least add micron or the nanometer silicon carbide of 40 parts.From the angle of theoretical investigation, disclosed document just points out that studied silicon carbide/silicon rubber has conductance non-linear character, do not introduce other performance of this material, but because the addition of silicon carbide is very large, silicon carbide/silicon rubber composite material is caused to occur following problem: (1) matrix material disruptive strength is low, DC breakdown intensity is no more than 10kV/mm, can not be applied to High-Voltage Insulation; (2) mechanical property of matrix material is bad, and tensile break strength is less than 2.5MPa, and elongation at break is less than 40%; (3) composite emulsion viscosities is large, is uniformly mixed difficulty, not easily gets rid of bubble.Although also describe in document and add the conductance non-linear character that carbon black can improve micrometer silicon carbide silicon/silicon rubber composite material simultaneously, but in mentioned material, silicon carbide and the minimum material of carbon black addition are: the addition 15.8Vol% of silicon carbide, the addition 1.3Vol% of carbon black, also namely the formula of this material is 98.5 parts of silicon rubber, 60 parts of micrometer silicon carbide silicon, 3 parts of carbon blacks, and specific gravity of black is set to 2.0g/cm
3.Because the silicon carbide added is more, and with the addition of carbon black again, the DC breakdown intensity of the silicon carbide/silicon rubber composite material obtained also is no more than 10kV/mm; Mechanical property is more bad, and tensile break strength and elongation at break are respectively 1.5MPa and 20%, and the viscosity simultaneously again because of matrix material is large, increases the difficulty being uniformly mixed and being vented.
Summary of the invention
The present invention seeks to the problem that disruptive strength is low, physical-mechanical property is poor in order to solve existing silicone rubber based conductance Nonlinear Composite, and a kind of liquid silastic base conductance non-linear dielectric materials is provided.
Liquid silastic base conductance non-linear dielectric materials of the present invention is made up of 100 parts of liquid silastics and 10 ~ 20 parts of nonlinear functions fillers by weight, and nonlinear functions filler is made up of nano zine oxide, nano titanium oxide, nanometer silicon carbide, carbon nanotube, graphitized carbon black and nano-graphite;
Wherein liquid silastic is the using double-component liquid silicon rubber of the polymerization degree 100 ~ 2000, the particle diameter of nano zine oxide is 10nm ~ 100nm, the particle diameter of nano titanium oxide is 10nm ~ 100nm, the particle diameter of nanometer silicon carbide is 10nm ~ 100nm, carbon nanotube is diameter 5nm ~ 80nm, the single armed carbon nanotube of pipe range 1 μm ~ 15 μm, both arms carbon nanotube or multi-walled carbon nano-tubes, the particle diameter of graphitized carbon black is 10nm ~ 100nm, and the sheet of nano-graphite is thick is 10nm ~ 100nm, sheet footpath is 1 μm ~ 2 μm.
Adopt vacuum mixer that liquid silastic is mixed bubble removing side by side with various filler below 50 DEG C, after shaping, obtain liquid silastic base conductance non-linear dielectric materials through sulfuration.
The present invention adopts multiple nonlinear functions filler composite, give full play to the synergistic effect of each functional stuffing, the nonlinear functions filler added in 100 parts of liquid silastics is no more than 20 parts, composite emulsion viscosities in whipping process is low, be easy to stir, the alternating current breakdown intensity of the liquid silastic base conductance non-linear dielectric materials prepared is not less than 30kV/mm, and DC breakdown intensity is not less than 60kV/mm, and in below 8kV/mm electric field, lower volume resistivity is not less than 10
13Ω m, maximum nonlinear factor 6 ~ 20, tensile strength is not less than 6.0MPa, and elongation at break is not less than 200%.The present invention is mainly used in high-voltage insulating compound material.
Embodiment
Embodiment one: present embodiment liquid silastic base conductance non-linear dielectric materials is made up of 100 parts of liquid silastics and 10 ~ 20 parts of nonlinear functions fillers by weight, and nonlinear functions filler is made up of nano zine oxide, nano titanium oxide, nanometer silicon carbide, carbon nanotube, graphitized carbon black and nano-graphite;
Wherein liquid silastic is the using double-component liquid silicon rubber of the polymerization degree 100 ~ 2000, the particle diameter of nano zine oxide is 10nm ~ 100nm, the particle diameter of nano titanium oxide is 10nm ~ 100nm, the particle diameter of nanometer silicon carbide is 10nm ~ 100nm, carbon nanotube is diameter 5nm ~ 80nm, the single armed carbon nanotube of pipe range 1 μm ~ 15 μm, both arms carbon nanotube or multi-walled carbon nano-tubes, the particle diameter of graphitized carbon black is 10nm ~ 100nm, and the sheet of nano-graphite is thick is 10nm ~ 100nm, sheet footpath is 1 μm ~ 2 μm.
Present embodiment is raw materials used is commercially available prod, nonlinear functions filler is nano material, because nano-grain size is little, specific surface area is large, surface energy is high, surface atom proportion large, there is unique quantum size effect, surface effects, small-size effect and macro quanta tunnel effect.Nonlinear functions filler nanometer zinc oxide, nano titanium oxide, nanometer silicon carbide, carbon nanotube, graphitized carbon black and nano-graphite can by any than compositions, the present invention gives full play to the synergistic effect of each nano functional filler, the alternating current breakdown intensity obtaining liquid silastic base conductance non-linear dielectric materials is not less than 30kV/mm, DC breakdown intensity is not less than 60kV/mm, maximum nonlinear factor 6 ~ 20, tensile strength is not less than 6.0MPa, and elongation at break is not less than the non-linear dielectric materials of 200%.
Embodiment two: present embodiment and embodiment one are made up of 100 parts of liquid silastics and 12 ~ 18 parts of nonlinear functions fillers by weight unlike liquid silastic base conductance non-linear dielectric materials.Other parameter is identical with embodiment one.
Embodiment three: present embodiment and embodiment one are made up of 100 parts of liquid silastics and 13 parts of nonlinear functions fillers by weight unlike liquid silastic base conductance non-linear dielectric materials.Other parameter is identical with embodiment one.
Embodiment four: one of present embodiment and embodiment one to three are made up of 100 parts of liquid silastics and 20 parts of nonlinear functions fillers by weight unlike liquid silastic base conductance non-linear dielectric materials, containing 5 ~ 15 parts of nano zine oxides in nonlinear functions filler.Other parameter is identical with one of embodiment one to three.
Embodiment five: one of present embodiment and embodiment one to four are made up of 100 parts of liquid silastics and 20 parts of nonlinear functions fillers by weight unlike liquid silastic base conductance non-linear dielectric materials, containing 3 ~ 10 parts of nanometer silicon carbides in nonlinear functions filler.Other parameter is identical with one of embodiment one to four.
Embodiment six: one of present embodiment and embodiment one to four are made up of 100 parts of liquid silastics and 20 parts of nonlinear functions fillers by weight unlike liquid silastic base conductance non-linear dielectric materials, containing 4 ~ 6 parts of nanometer silicon carbides in nonlinear functions filler.Other parameter is identical with one of embodiment one to four.
Embodiment seven: one of present embodiment and embodiment one to six are made up of 100 parts of liquid silastics, 10 parts of nano zine oxides, 2 parts of nano titanium oxides, 5 parts of nanometer silicon carbides, 0.5 part of carbon nanotube, 0.5 part of graphitized carbon black and 0.5 part of nano-graphite by weight unlike liquid silastic base conductance non-linear dielectric materials.Other parameter is identical with one of embodiment one to six.
Embodiment eight: one of present embodiment and embodiment one to seven are 40nm ~ 60nm unlike the particle diameter of nano zine oxide, the particle diameter of nano titanium oxide is 40nm ~ 70nm, the particle diameter of nanometer silicon carbide is 40nm ~ 60nm, carbon nanotube is diameter 10nm ~ 20nm, the single armed carbon nanotube of pipe range 5 μm ~ 10 μm, both arms carbon nanotube or multi-walled carbon nano-tubes, the particle diameter of graphitized carbon black is 20nm ~ 40nm, and the sheet of nano-graphite is thick is 20nm ~ 40nm, sheet footpath is 1 μm ~ 2 μm.Other parameter is identical with one of embodiment one to seven.
Embodiment one: the present embodiment liquid silastic base conductance non-linear dielectric materials is made up of 100 parts of liquid silastics, 10 parts of nano zine oxides, 2 parts of nano titanium oxides, 5 parts of nanometer silicon carbides, 0.5 part of carbon nanotube, 0.5 part of graphitized carbon black and 0.5 part of nano-graphite by weight;
Wherein liquid silastic to be mean polymerisation degree be 500 using double-component liquid silicon rubber, the particle diameter of nano zine oxide is 30nm ~ 60nm, the particle diameter of nano titanium oxide is 40nm ~ 60nm, the particle diameter of nanometer silicon carbide is 30nm ~ 60nm, carbon nanotube is the single armed carbon nanotube of diameter 5nm ~ 15nm, pipe range 5 μm ~ 15 μm, the particle diameter of graphitized carbon black is 10nm ~ 30nm, and the sheet of nano-graphite is thick is 30nm ~ 50nm, sheet footpath is 1 μm ~ 2 μm.
Adopt vacuum mixer that liquid silastic is mixed bubble removing side by side with various filler at 45 DEG C, after shaping, obtain liquid silastic base conductance non-linear dielectric materials through sulfuration.
Liquid silastic base conductance non-linear dielectric materials volume specific resistance in below 8kV/mm electric field that the present embodiment obtains is 5 × 10
14Ω m, alternating current breakdown intensity is 32kV/mm, and DC breakdown intensity is 63kV/mm, and maximum nonlinear factor is 12.5, and tensile strength is 7.0MPa, and elongation at break is 240%.
Embodiment two: the present embodiment liquid silastic base conductance non-linear dielectric materials is made up of 100 parts of liquid silastics, 5 parts of nano zine oxides, 1 part of nano titanium oxide, 4 parts of nanometer silicon carbides, 1.0 parts of carbon nanotubes, 1 part of graphitized carbon black and 1 part of nano-graphite by weight;
Wherein liquid silastic to be mean polymerisation degree be 800 using double-component liquid silicon rubber, the particle diameter of nano zine oxide is 40nm ~ 60nm, the particle diameter of nano titanium oxide is 40nm ~ 70nm, the particle diameter of nanometer silicon carbide is 40nm ~ 60nm, carbon nanotube is the both arms carbon nanotube of diameter 10nm ~ 20nm, pipe range 5 μm ~ 10 μm, the particle diameter of graphitized carbon black is 20nm ~ 40nm, and the sheet of nano-graphite is thick is 20nm ~ 40nm, sheet footpath is 1 μm ~ 2 μm.
Adopt vacuum mixer that liquid silastic is mixed bubble removing side by side with various filler at 45 DEG C, after shaping, obtain liquid silastic base conductance non-linear dielectric materials through sulfuration.
Liquid silastic base conductance non-linear dielectric materials volume specific resistance in below 8kV/mm electric field that the present embodiment obtains is 9 × 10
14Ω m, alternating current breakdown intensity is 36kV/mm, and DC breakdown intensity is 67kV/mm, and maximum nonlinear factor is 10.0, and tensile strength is 7.6MPa, and elongation at break is 280%.
Embodiment three: the present embodiment liquid silastic base conductance non-linear dielectric materials is made up of 100 parts of liquid silastics, 3 parts of nano zine oxides, 1 part of nano titanium oxide, 3.5 parts of nanometer silicon carbides, 1 part of carbon nanotube, 1 part of graphitized carbon black and 0.5 part of nano-graphite by weight;
Wherein liquid silastic to be mean polymerisation degree be 1500 using double-component liquid silicon rubber, the particle diameter of nano zine oxide is 30nm ~ 50nm, the particle diameter of nano titanium oxide is 40nm ~ 60nm, the particle diameter of nanometer silicon carbide is 30nm ~ 60nm, carbon nanotube is the multi-arm carbon nano-tube of diameter 10nm ~ 20nm, pipe range 5 μm ~ 15 μm, the particle diameter of graphitized carbon black is 20nm ~ 40nm, and the sheet of nano-graphite is thick is 40nm ~ 60nm, sheet footpath is 1 μm ~ 2 μm.
Adopt vacuum mixer that liquid silastic is mixed bubble removing side by side with various filler at 40 DEG C, after shaping, obtain liquid silastic base conductance non-linear dielectric materials through sulfuration.
Liquid silastic base conductance non-linear dielectric materials volume specific resistance in below 8kV/mm electric field that the present embodiment obtains is 1 × 10
15Ω m, alternating current breakdown intensity is 38kV/mm, and DC breakdown intensity is 70kV/mm, and maximum nonlinear factor is 8.5, and tensile strength is 8.0MPa, and elongation at break is 290%.
Claims (3)
1. a liquid silastic base conductance non-linear dielectric materials, it is characterized in that liquid silastic base conductance non-linear dielectric materials is made up of 100 parts of liquid silastics and 20 parts of nonlinear functions fillers by weight, nonlinear functions filler is made up of nano zine oxide, nano titanium oxide, nanometer silicon carbide, carbon nanotube, graphitized carbon black and nano-graphite;
Wherein liquid silastic is the using double-component liquid silicon rubber of the polymerization degree 100 ~ 2000, the particle diameter of nano zine oxide is 10nm ~ 100nm, the particle diameter of nano titanium oxide is 10nm ~ 100nm, the particle diameter of nanometer silicon carbide is 10nm ~ 100nm, carbon nanotube is diameter 5nm ~ 80nm, the Single Walled Carbon Nanotube of pipe range 1 μm ~ 15 μm, double-walled carbon nano-tube or multi-walled carbon nano-tubes, the particle diameter of graphitized carbon black is 10nm ~ 100nm, and the sheet of nano-graphite is thick is 10nm ~ 100nm, sheet footpath is 1 μm ~ 2 μm; Containing the nano zine oxide of 5 ~ 15 parts in nonlinear functions filler, containing the nanometer silicon carbide of 3 ~ 10 parts.
2. a kind of liquid silastic base conductance non-linear dielectric materials according to claim 1, it is characterized in that liquid silastic base conductance non-linear dielectric materials is made up of 100 parts of liquid silastics and 20 parts of nonlinear functions fillers by weight, containing 4 ~ 6 parts of nanometer silicon carbides in nonlinear functions filler.
3. a kind of liquid silastic base conductance non-linear dielectric materials according to claim 1 and 2, it is characterized in that the particle diameter of nano zine oxide is 40nm ~ 60nm, the particle diameter of nano titanium oxide is 40nm ~ 70nm, the particle diameter of nanometer silicon carbide is 40nm ~ 60nm, carbon nanotube is diameter 10nm ~ 20nm, the Single Walled Carbon Nanotube of pipe range 5 μm ~ 10 μm, double-walled carbon nano-tube or multi-walled carbon nano-tubes, the particle diameter of graphitized carbon black is 20nm ~ 40nm, and the sheet of nano-graphite is thick is 20nm ~ 40nm, sheet footpath is 1 μm ~ 2 μm.
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| CN105331110A (en) * | 2015-11-17 | 2016-02-17 | 镇江高美新材料有限公司 | Liquid silicone rubber based conductive nonlinear insulating material |
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| JP6870898B2 (en) * | 2015-01-09 | 2021-05-12 | モメンティブ パフォーマンス マテリアルズ ゲーエムベーハーＭｏｍｅｎｔｉｖｅ Ｐｅｒｆｏｒｍａｎｃｅ Ｍａｔｅｒｉａｌｓ ＧｍｂＨ | Use of silicone rubber compositions for the manufacture of insulators for high voltage direct current applications |
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| CN101440180A (en) * | 2008-12-26 | 2009-05-27 | 哈尔滨理工大学 | Polyolefin based non-linear dielectric material |
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| CN105331110A (en) * | 2015-11-17 | 2016-02-17 | 镇江高美新材料有限公司 | Liquid silicone rubber based conductive nonlinear insulating material |
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