Silicone rubber with excellent tracking resistance and high heat conductivity

A technology of tracking resistance and high thermal conductivity, which is applied in the field of electrical insulating polymer materials, can solve problems such as threats to the safe operation of the power grid, poor thermal conductivity, and temperature rise, and achieve improved tracking resistance, obvious thermal conductivity, and The effect of improving thermal conductivity

Inactive Publication Date: 2016-10-12
ELECTRIC POWER RES INST STATE GRID JIANGXI ELECTRIC POWER CO +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, when there is pollution on the surface of the silicone rubber composite insulator, discharge will occur on the surface. Due to the poor thermal conductivity of the material, the temperature in the local area will rise by several hundred degrees Celsius. If the local energy exceeds the interatomic energy of the molecular chain of the silicone rubber itself, the silicone rubber The composite material will decompose, leaving a carbonized conductive channel on the surface of the insulator. In severe cases, the surface of the material will burn for a short time, causing the insulator to fail and threatening the safe operation of the power grid.

Method used

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  • Silicone rubber with excellent tracking resistance and high heat conductivity
  • Silicone rubber with excellent tracking resistance and high heat conductivity
  • Silicone rubber with excellent tracking resistance and high heat conductivity

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] (1) Take nano-ATH with a mass fraction of 100% (relative to the silicone rubber matrix), and perform surface treatment on the nanoparticles. The steps are: take 150% ethanol and pour it into a beaker, and then add 5% The silane coupling agent, the mass fraction is 0.3% acetic acid and the mass fraction is 1.25% water, the pH value of the solution is adjusted to about 5, and the silane coupling agent is fully hydrolyzed with an electromagnetic stirrer for 40 minutes to obtain the silane aqueous solution; the ATH particles Add it into the silane aqueous solution, and stir with an electromagnetic stirrer for 40 minutes to obtain an inorganic nanoparticle solution.

[0047] (2) Mixing the silicone rubber matrix with the inorganic nanoparticle solution: place the methyl vinyl silicone rubber matrix on the rubber mixer, and gradually add the inorganic nanoparticle solution in step 1) after wrapping the roll, and mix evenly to obtain the silicone rubber and A blend of emulsion...

Embodiment 2

[0051] The doped nanoparticles were replaced by ATH with a mass fraction of 100% in Example 1 to BN with a mass fraction of 100%, and the amount of other reagents remained unchanged; other steps were the same as in Example 1.

[0052] Figure 2(a)Under the condition that the sample preparation environment and other reagent dosage ratios are exactly the same, the doped particles are respectively 100% ATH and 100% BN (Example 1-2) of the thermal conductivity versus temperature curve comparison chart, it is found that Both ATH and BN can improve the thermal conductivity of silicone rubber, and the thermal conductivity of BN filled silicone rubber increases more than ATH filled, up to 0.6Wm -1 k -1 .

Embodiment 3

[0054] It is the ATH of 100% to replace the ATH that is 25% and the BN that massfraction is 75% by the massfraction in embodiment 1 by the nanoparticle of doping, the consumption of other reagents is constant; Other steps are with embodiment 1 same.

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Abstract

The invention discloses silicone rubber with excellent tracking resistance and high heat conductivity. The silicone rubber is prepared from a methyl vinyl silicone rubber base body, inorganic nanoparticles, a vulcanizing agent, a cross-linking agent (TAIC), hydroxyl silicone oil and a silane coupling agent. The inorganic nanoparticles including aluminum hydroxide (ATH) and boron nitride (BN) are used as filler and are combined with the silicone rubber in a mixing and doping mode to obtain unitary and binary doped silicon rubber composite insulating material excellent in heat conductivity and tracking resistance. As ATH and BN are doped into the silicone rubber, tracking resistance and heat conductivity of the silicon rubber can be improved greatly.

Description

[0001] technical field [0002] The invention belongs to the field of electrical insulating polymer materials, in particular to a method for preparing silicone rubber with tracking resistance and high thermal conductivity. Background technique [0003] Composite insulators based on silicone rubber have good mechanical strength, electrical insulation and chemical stability, are light in weight, easy to operate and maintain, and are very reliable in high-voltage applications. They are increasingly replacing glass and ceramic insulators. [0004] However, when there is pollution on the surface of the silicone rubber composite insulator, discharge will occur on the surface. Due to the poor thermal conductivity of the material, the temperature in the local area will rise by several hundred degrees Celsius. If the local energy exceeds the interatomic energy of the molecular chain of the silicone rubber itself, the silicone rubber The composite material will decompose, leaving a ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/07C08L83/06C08K13/06C08K9/06C08K3/22C08K3/38
CPCC08L83/04C08K2201/003C08K2201/011
Inventor 周求宽晏年平王子悦
Owner ELECTRIC POWER RES INST STATE GRID JIANGXI ELECTRIC POWER CO
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