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A kind of physical cross-linked insulating material for high-voltage direct current cable and preparation method thereof

A technology of physical cross-linking and insulating materials, applied in insulators, organic insulators, plastic/resin/wax insulators, etc., can solve the problems of normal use of cables, inability to recycle, poor environmental performance, etc., to improve mechanical properties and electrical properties. Insulation performance, easy recycling, low cost effect

Active Publication Date: 2020-10-16
SHANGHAI KAIBO SPECIAL CABLE FACTORY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Because the currently widely used cross-linked polyethylene materials cannot be recycled, and the traditional chemical cross-linking method is complex in process, difficult to control, high in energy consumption, high in cost, and there are problems that by-products will affect the normal use of cables. , poor environmental performance

Method used

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  • A kind of physical cross-linked insulating material for high-voltage direct current cable and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) The specific process of spinning polyethylene fiber is:

[0033] Mix the sodium montmorillonite suspension with a mass fraction of 5% and the methacryloyloxyethyltrimethylammonium chloride solution with a mass fraction of 10%, heat and stir vigorously, and perform suction filtration after cooling to room temperature. After washing and drying, add dibenzoyl peroxide, polyethylene and silicone oil to ethanol, mix evenly at high speed, melt extrusion and water bath drawing to obtain polyethylene fiber:

[0034] In the preparation process of polyethylene fiber, the total mass parts of each raw material is based on 100 parts, of which: 3 parts of sodium montmorillonite, 1 part of methacryloyloxyethyltrimethylammonium chloride, diphenyl peroxide 1 part of formyl, 89 parts of polyethylene, 1 part of silicone oil, 6 parts of ethanol;

[0035] During the mixing process of sodium montmorillonite suspension and methacryloyloxyethyltrimethylammonium chloride solution, the heat...

Embodiment 2

[0044] (1) The specific process of spinning polyethylene fiber is:

[0045] Mix the sodium montmorillonite suspension with a mass fraction of 6% and the methacryloyloxyethyltrimethylammonium chloride solution with a mass fraction of 12%, heat and stir vigorously, and perform suction filtration after cooling to room temperature. After washing and drying, add dibenzoyl peroxide, polyethylene and silicone oil to ethanol, mix evenly at high speed, melt extrusion and water bath drafting to obtain polyethylene fiber and straw fiber unbundling dispersion:

[0046] In the preparation process of polyethylene fiber, the total mass parts of each raw material is based on 100 parts, of which: 2 parts of sodium montmorillonite, 1 part of methacryloyloxyethyltrimethylammonium chloride, diphenyl peroxide 0.5 parts of formyl, 90 parts of polyethylene, 0.5 parts of silicone oil, 6 parts of ethanol;

[0047] During the mixing process of sodium montmorillonite suspension and methacryloxyethyltri...

Embodiment 3

[0056] (1) The specific process of spinning polyethylene fiber is:

[0057] Mix the sodium montmorillonite suspension with a mass fraction of 4% and the methacryloyloxyethyltrimethylammonium chloride solution with a mass fraction of 12%, heat and stir vigorously, and perform suction filtration after cooling to room temperature. After washing and drying, add dibenzoyl peroxide, polyethylene and silicone oil to ethanol, mix evenly at high speed, melt extrusion and water bath drafting to obtain polyethylene fiber and straw fiber unbundling dispersion:

[0058] In the preparation process of polyethylene fiber, the total mass fraction of each raw material is based on 100 parts, of which: 4 parts of sodium montmorillonite, 2 parts of methacryloyloxyethyltrimethylammonium chloride, diphenyl peroxide 1 part of formyl, 85 parts of polyethylene, 1 part of silicone oil, 7 parts of ethanol;

[0059] During the mixing process of sodium montmorillonite suspension and methacryloyloxyethyltr...

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Abstract

The invention relates to the field of cable insulating materials, and discloses a physical-crosslinked type insulating material used for a high-voltage direct-current cable and a preparing method thereof. Raw materials of the insulating material include, by weight, 30-45% of polyethylene fibers, 15-50% of polyvinyl alcohol fibers and 20-40% of cellulose nanocrystals. The method includes (1) mixinga sodium montmorillonite suspension with methacrylatoethyl trimethyl ammonium chloride, adding the mixture, dibenzoyl peroxide, polyethylene and silicone oil together into ethanol, fully mixing the materials, melting and extruding the mixture, and performing water-bath drafting to obtain the polyethylene fibers; (2) allowing a spinning solution prepared by dissolving polyvinyl alcohol to stand, and subjecting the spinning solution to extrusion, solidification, drawing, drawing and thermal treatment to obtain the polyvinyl alcohol fibers; and (3) subjecting the prepared polyethylene fibers, the polyvinyl alcohol fibers and the cellulose nanocrystals to heating and pressurized premixing so as to obtain the physical-crosslinked type insulating material. The prepared physical-crosslinked typeinsulating material has higher structural stability than common insulating materials, and has excellent mechanical performance, electric insulating performance, heat resistance, acid and alkali resistance, and corrosion resistance. A process is simple, energy consumption is low, and the cost is low. The physical-crosslinked type insulating material is convenient to recover and reutilize and is extremely good in environment performance.

Description

technical field [0001] The invention relates to the field of cable insulating materials, and provides a physically cross-linked insulating material for high-voltage DC cables and a preparation method thereof. Background technique [0002] With the attention and promotion of new energy at home and abroad and the need for long-distance high-power power transmission, high-voltage direct current transmission has the advantages of low line cost, low loss, no reactive power, convenient connection, easy control and adjustment, etc. It has been widely used in power transmission. The research and development of insulated cables, which are an important part of HVDC power transmission, has gradually been put on the agenda. In recent years, the development of high-voltage DC cables at home and abroad is very rapid, and its research and development and operation volume have gradually increased. [0003] Polyethylene is widely used due to its excellent dielectric properties, physical an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/06C08L29/04C08L1/02C08K3/34D01F6/46D01F1/10D01F6/14H01B3/44
CPCC08L23/06C08L2203/202C08L2205/03C08L2205/16D01F1/10D01F6/14D01F6/46H01B3/441C08L29/04C08L1/02C08K3/346
Inventor 陈庆昝航
Owner SHANGHAI KAIBO SPECIAL CABLE FACTORY