Extra-high-voltage heat-resistant insulating material and preparation method thereof

A heat-resistant insulation, ultra-high voltage technology, applied in the direction of organic insulators, plastic/resin/wax insulators, etc., can solve the problem of unfavorable large-scale production, can not improve the heat resistance and anti-aging properties of materials, and the preparation process is complicated, etc. problem, to achieve the effect of suppressing the accumulation of space charges, avoiding flashover along the surface, and good compatibility

Inactive Publication Date: 2016-02-17
STATE GRID HENAN ELECTRIC ZHOUKOU POWER SUPPLY
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

The insulating material prepared by the invention has good flexibility and excellent mechanical properties, and can effectively improve the mechanical properties and electrical properties of ultra-high voltage DC cables, but the preparation process of the invention is complicated, which is not conducive to large-scale production
Invention patent CN101445627A discloses a high-voltage DC cable insulation material and its preparation method. The technical solution adopted in the invention is to mix 100 parts by weight of low-density polyethylene, 0.1-1 parts by weight of antioxidant, 0.5-5 parts by weight of The maleic anhydride is put into the internal mixer for mixing, and then 0.1-5 parts by weight of cross-linking agent is added and mixed for 10-15 minutes to obtain high-voltage DC cable insulation materials. The insulation materials prepared by the invention can effectively improve the high-voltage The mechanical properties and electrical properties of DC cables, but this invention can not improve the heat resistance and aging resistance of materials

Method used

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  • Extra-high-voltage heat-resistant insulating material and preparation method thereof

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preparation example Construction

[0036] The present invention also provides a preparation method for the above-mentioned UHV heat-resistant insulating material, comprising the following steps:

[0037]1) Add 0.1~1 parts by weight of butyl titanate to 10~50 parts by weight of distilled water, place in a magnetic stirrer, stir for 20~40min at 20~40°C, and then add 2~6 parts by weight of nano-dioxide silicon, ultrasonically treated, filtered, and then dried at 50-60°C to obtain surface-modified nano-silica;

[0038] 2) Add the surface-modified nano-silica obtained in step 1) and 80-100 parts by weight of epoxy resin to the torque rheometer in sequence, and mix at 140-180°C for 20-40 minutes to obtain nano-silica Silicon modified epoxy resin;

[0039] 3) The nano-silica modified epoxy resin obtained in step 2), 15-30 parts by weight of polytetrafluoroethylene, 2-10 parts by weight of nano-silicon carbide, nano-boron nitride and nano-titanium dioxide mixture, 2-5 parts by weight 1 part compatibilizer is put into...

Embodiment 1

[0048] A method for preparing a UHV heat-resistant insulating material, comprising the following steps:

[0049] 1) Add 0.1 parts by weight of butyl titanate to 10 parts by weight of distilled water, place it in a magnetic stirrer, stir at 20°C for 20 minutes, then add 2 parts by weight of nano-silica, ultrasonic treatment, ultrasonic frequency 15kHz, power 300W, time 20min, repeat 3 times, each interval is 5min, filter, and then dry at 50°C to obtain surface-modified nano-silica;

[0050] 2) Add the surface-modified nano-silica and 80 parts by weight of epoxy resin obtained in step 1) to the torque rheometer in sequence, and mix at 140°C for 20 minutes to obtain nano-silica-modified epoxy resin ;

[0051] 3) The nano-silica modified epoxy resin obtained in step 2), 15 parts by weight of polytetrafluoroethylene with a particle size of 0.5-5 μm, 2 parts by weight of nano-silicon carbide and nano-nitrided particles with a particle size of 30-60 nm A mixture of boron and nano-t...

Embodiment 2

[0055] A method for preparing a UHV heat-resistant insulating material, comprising the following steps:

[0056] 1) Add 0.3 parts by weight of butyl titanate to 15 parts by weight of distilled water, place it in a magnetic stirrer, stir at 23°C for 25 minutes, then add 3 parts by weight of nano-silica, ultrasonic treatment, ultrasonic frequency 18kHz, power 350W, time 25min, repeat 3 times, each interval 8min, filter, and then dry at 55°C to obtain surface-modified nano-silica;

[0057] 2) Add the surface-modified nano-silica and 85 parts by weight of epoxy resin obtained in step 1) to the torque rheometer in sequence, and mix at 150°C for 25 minutes to obtain nano-silica-modified epoxy resin ;

[0058] 3) The nano-silica modified epoxy resin obtained in step 2), 20 parts by weight of polytetrafluoroethylene with a particle size of 0.5-5 μm, and 5 parts by weight of nano-silicon carbide and nano-nitrided particles with a particle size of 30-60 nm A mixture of boron and nano-...

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Abstract

The invention belongs to the technical field of electrical equipment and particularly relates to an extra-high-voltage heat-resistant insulating material and a preparation method thereof. The extra-high-voltage heat-resistant insulating material comprises components in parts by weight as follows: 80-100 parts of epoxy resin, 15-30 parts of polytetrafluoroethylene, 2-6 parts of nano-silica, 0.1-1 part of butyl titanate, 10-50 parts of distilled water, 2-10 parts of a mixture of nano silicon carbide, nano boron nitride and nano titanium dioxide, 5-15 parts of a diluent, 2-5 parts of a compatilizer, 0.2-2 parts of an antioxidant and 2-8 parts of a cross-linking agent. The prepared extra-high-voltage heat-resistant insulating material can effectively inhibit space charge accumulation in cable insulation materials and has good mechanical properties, electrical properties, thermal properties and physical properties and excellent comprehensive properties.

Description

technical field [0001] The invention belongs to the technical field of electric equipment, and in particular relates to an ultra-high voltage heat-resistant insulating material and a preparation method thereof. Background technique [0002] In recent years, my country's electric power industry has developed rapidly, the operating voltage level of the power grid system has been continuously improved, and the network scale has gradually expanded. The ultra-high or ultra-high voltage transmission network is the skeleton and core of the smart grid that State Grid is building. The construction of an ultra-high voltage transmission network can greatly improve the transmission capacity of my country's power grid and reduce the loss of long-distance power transmission. However, higher voltage levels and DC transmission poses a major challenge to the safety and reliability of insulating materials widely used in electrical equipment. [0003] High-performance insulating materials are ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/00C08L27/18C08L51/06C08K13/06C08K9/04C08K3/22C08K3/36C08K3/38C08K3/34C08K5/14H01B3/40
Inventor 李欣石雨霏李岩
Owner STATE GRID HENAN ELECTRIC ZHOUKOU POWER SUPPLY
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