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High-temperature-resistant cable internal insulating material and preparation method and application thereof

An internal insulation and high temperature resistant technology, applied in insulators, inorganic insulators, organic insulators, etc., can solve the problem that the resistivity is greatly affected by temperature, the amount of space charge injection and accumulation is small, and inorganic nanoparticles are compatible with polymer matrix materials. It can improve compatibility, reduce the amount of space charge injection and accumulation, and improve the problem of space charge accumulation.

Active Publication Date: 2020-12-04
JIUJIANG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In view of the above-mentioned technical deficiencies, the purpose of the present invention is to provide a kind of high temperature resistant cable internal insulation material and its preparation method and application. It is greatly affected by temperature and the technical defects of small space charge injection and accumulation, and overcomes the technical defects of poor compatibility between inorganic nanoparticles and polymer matrix materials. The prepared high temperature resistant cable internal insulation material can be used in high voltage DC plastic used in cables

Method used

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  • High-temperature-resistant cable internal insulating material and preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0031] A preparation method for an internal insulation material of a high temperature resistant cable, comprising the steps of:

[0032] (1) Mix zinc sulfate with sodium hydroxide at a ratio of 1:2, and then add TiO with the amount of zinc sulfate and other substances 2 , after hydrothermal reaction at 180°C for 3.5h in the reactor, washed and dried to constant weight, TiO 2 -ZnO composite material;

[0033] (2) TiO 2 - Fabrication of ZnO composite material supporting substrate: coating epoxy resin on the substrate, the thickness of epoxy resin is 1mm, and then TiO 2 -ZnO composite material is evenly laid on the epoxy resin and dried at room temperature, TiO 2 -ZnO composite with a thickness of 2 mm to obtain TiO 2 - ZnO composite support substrate;

[0034] (3) Coating: The target material of the high-purity pyrolytic graphite target is placed horizontally in the vacuum chamber, so that the center of the target material is located at the center of the circle correspondin...

Embodiment 2

[0040] A preparation method for an internal insulation material of a high temperature resistant cable, comprising the steps of:

[0041] (1) Mix zinc nitrate with sodium hydroxide at a ratio of 1:2, and then add TiO with the amount of zinc nitrate and other substances 2 , after hydrothermal reaction at 200 ° C for 2.5 h in the reactor, washed and dried to constant weight, TiO 2 -ZnO composite material;

[0042] (2)TiO 2 - Fabrication of ZnO composite material supporting substrate: coating epoxy resin on the substrate, the thickness of epoxy resin is 1.5mm, and then TiO 2 -ZnO composite material is evenly laid on the epoxy resin and dried at room temperature, TiO 2 -ZnO composite with a thickness of 2.5 mm to obtain TiO 2 - ZnO composite support substrate;

[0043] (3) Coating: The target material of the high-purity pyrolytic graphite target is placed horizontally in the vacuum chamber, so that the center of the target material is located at the center of the circle corres...

Embodiment 3

[0049] A preparation method for an internal insulation material of a high temperature resistant cable, comprising the steps of:

[0050] (1) Mix zinc sulfate with sodium hydroxide at a ratio of 1:2, and then add TiO with the amount of zinc sulfate and other substances 2 , after hydrothermal reaction at 220°C for 3 hours in the reactor, washed and dried to constant weight, TiO 2 -ZnO composite material;

[0051] (2)TiO 2 - Fabrication of ZnO composite material supporting substrate: coating epoxy resin on the substrate, the thickness of epoxy resin is 1.5mm, and then TiO 2 -ZnO composite material is evenly laid on the epoxy resin and dried at room temperature, TiO 2 -ZnO composite with a thickness of 2.5 mm to obtain TiO 2 - ZnO composite support substrate;

[0052] (3) Coating: The target material of the high-purity pyrolytic graphite target is placed horizontally in the vacuum chamber, so that the center of the target material is located at the center of the circle corres...

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Abstract

The invention relates to the technical field of cable internal insulating material preparation, in particular to a high-temperature-resistant cable internal insulating material and a preparation method and application thereof. The preparation method comprises the following steps: preparing a TiO2-ZnO composite material, loading the TiO2-ZnO composite material on a substrate, preparing a carbon film by conducting magnetron sputtering on high-purity pyrolytic graphite on the surface of the TiO2-ZnO composite material loaded substrate to obtain a coated material, calcining the coated material ata high temperature, and carrying out ball milling to obtain a filler; and finally, blending the filler and crosslinked polyethylene, and carrying out heating polymerization to prepare the high-temperature-resistant cable internal insulating material. According to the preparation method, the technical defects that the resistivity is greatly influenced by temperature and the space charge injection and accumulation amount is small are overcome, the technical defect that the compatibility of inorganic nanoparticles and a high polymer matrix material is poor is overcome, and the prepared high-temperature-resistant cable internal insulating material can be applied to a high-voltage direct-current plastic cable.

Description

technical field [0001] The invention relates to the technical field of preparation of cable internal insulating materials, in particular to a high-temperature-resistant cable internal insulating material and its preparation method and application. Background technique [0002] Compared with AC cables, high-voltage DC cables have multiple advantages, such as small power loss, stable operation, large transmission capacity, unlimited transmission distance, and can be connected to asynchronous grids, etc. The current high-voltage DC plastic cables use cross-linked polyethylene (XLPE) as the main insulation of the cable. XLPE maintains the advantages of high insulation resistance, good voltage resistance, low dielectric constant and dielectric loss of polyethylene, and has better insulation properties than polyethylene. Excellent thermal and mechanical properties, and the overall performance has been significantly improved. [0003] However, with the large-scale use of XLPE as a...

Claims

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Application Information

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IPC IPC(8): C08L23/06C08K9/02C08K3/22C08K3/04C08K5/13C08K13/06C08J5/18H01B3/44H01B3/10
CPCC08K9/02C08K3/22C08K3/04C08K5/13C08K13/06C08J5/18H01B3/441H01B3/10C08L2201/08C08L2203/20C08K2201/011C08K2003/2296C08K2003/2241C08L23/06
Inventor 杨长春
Owner JIUJIANG UNIVERSITY
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