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Graphene-carbon nanotube synergistic high-electrical-property semiconductive shielding material and preparation method thereof

A technology of carbon nanotubes and high electrical performance, applied in the direction of magnetic/electric field shielding, electrical components, etc., can solve problems such as high electric field strength, insulation layer breakdown, and electric field deformation

Pending Publication Date: 2022-01-18
JIANGSU SHANGSHANG CABLE GRP NEW MATERIAL CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the electric field strength in the insulation layer of medium and high voltage power cables is very large, any tiny defect on the semi-conductive shielding layer may cause serious electric field deformation and partial discharge, and the protrusions on the surface of the shielding layer are prone to needle point effect under high voltage electric field , causing the phenomenon of electrical treeing, which eventually leads to the breakdown of the insulating layer

Method used

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  • Graphene-carbon nanotube synergistic high-electrical-property semiconductive shielding material and preparation method thereof
  • Graphene-carbon nanotube synergistic high-electrical-property semiconductive shielding material and preparation method thereof
  • Graphene-carbon nanotube synergistic high-electrical-property semiconductive shielding material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044]

[0045]

[0046] Accurately weigh various materials according to the formula for use, and passivate white oil, graphene microflake powder, single-walled carbon nanotubes, conductive carbon black, dispersant, dispersant, antioxidant, anti-scorch agent, and metal ions The agent and lubricant are fully mixed in a high-speed mixer, the mixing time is 10±2min, the temperature is controlled at 50±5°C, and the stirring rate is 40±3RPM, so that each raw material component is mixed in a high-speed mixer. Add ethylene-ethyl acrylate copolymer, ethylene octene copolymerized thermoplastic elastomer, and linear low-density polyethylene into the main feed of the reciprocating single-screw mixing extruder through a weight loss scale, and add the high-mixed powder through a weight loss scale The side feeding of the reciprocating single-screw mixing extruder, the white oil is injected into the mixing section of the reciprocating single-screw mixing extruder through the injection g...

Embodiment 2

[0049] A raw material of graphene and carbon nanotube synergistic high-electric performance semi-conductive shielding material includes the following components in parts by weight:

[0050]

[0051]

[0052] Processes such as mixing and extrusion granulation are the same as in Example 1. The properties of the prepared cable materials are shown in Table 1.

Embodiment 3

[0054] The raw material of a graphene and carbon nanotube synergistic high electrical performance semi-conductive shielding material includes the following components in parts by weight

[0055]

[0056]

[0057] Processes such as mixing and extrusion granulation are the same as in Example 1. The properties of the prepared cable materials are shown in Table 1.

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Abstract

The invention discloses a graphene-carbon nanotube synergistic high-electrical-property semiconductive shielding material and a preparation method thereof. The graphene-carbon nanotube synergistic high-electrical-property semiconductive shielding material is used for a semiconductive shielding layer of a middle-and-high-voltage power cable. The electrical shielding material comprises the following raw materials in parts by mass: 50-90 parts of an ethylene-ethyl acrylate copolymer, 5-25 parts of an ethylene-octene copolymer thermoplastic elastomer, 5-25 parts of linear low-density polyethylene, 5-10 parts of white oil, 5-20 parts of graphene microchip powder, 5-20 parts of a single-walled carbon nanotube, 15-50 parts of conductive carbon black, 0.5-2 parts of a dispersant, 0.2-1 part of a dispersing aid, 0.5-2 parts of an antioxidant, 0.1-0.8 part of an anti-scorching agent, 0.2-1 part of a metal ion passivator, 0.5-2 parts of a lubricant, 1-2 parts of a cross-linking agent, and 0.5-1 part of an assistant cross-linking agent. According to the graphene-carbon nanotube synergistic high-electrical-property semiconductive shielding material, the graphene and the carbon nanotube are compounded for use, so the use amount of a conductive filler can be effectively reduced, the processability of the material is improved, and the graphene-carbon nanotube synergistic high-electrical-property semiconductive shielding material has excellent conductivity, volume resistivity temperature stability, thermal stability, scorch resistance, surface smoothness and mechanical properties.

Description

technical field [0001] The invention relates to a graphene and carbon nanotube synergistic high-electric performance semi-conductive shielding material and a preparation method thereof, which are used for the semi-conductive shielding layer of medium and high voltage power cables and belong to the field of cable materials. Background technique [0002] With the upgrading of my country's power transmission and distribution system, the annual demand for medium and high voltage cross-linked polyethylene insulated (XLPE) cables is increasing. In recent years, my country has been committed to improving the quality level of semi-conductive shielding layers and narrowing the gap with foreign advanced levels. At present, the semi-conductive shielding material used in XLPE cables is mainly made by adding conductive carbon black and other additives to ethylene-vinyl acetate copolymer for cross-linking. The amount of carbon black added as a conductive filler is generally 36wt%-50wt%. ...

Claims

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Application Information

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IPC IPC(8): C08L23/08C08K3/04H05K9/00
CPCC08L23/0869H05K9/0081C08K2201/011C08K2201/001C08L2207/04C08L2205/025C08L23/0815C08K3/042C08K3/041
Inventor 戴学东丁成刘雄军梁福才凌国桢狄洪杰
Owner JIANGSU SHANGSHANG CABLE GRP NEW MATERIAL CO LTD
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