Crosslinked polyethylene composite material as well as preparation method and application thereof

A technology for cross-linked polyethylene and composite materials, applied in the field of cross-linked polyethylene composite materials and their preparation, can solve the problems of affecting electrical properties, mechanical properties and thermal stability, shorten the service life of cables, etc. Breakdown ability, the effect of improving the operating voltage of the AC cable material

Pending Publication Date: 2021-09-17
ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, cross-linked polyethylene insulating materials are inevitably exposed to high-temperature environments during production and use, and are prone to aging under the action of heat and oxygen, thereby affecting their electrical properties, mechanical properties and thermal stability, and reducing Cable service life

Method used

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  • Crosslinked polyethylene composite material as well as preparation method and application thereof
  • Crosslinked polyethylene composite material as well as preparation method and application thereof
  • Crosslinked polyethylene composite material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] This embodiment provides a cross-linked polyethylene composite material, comprising the following components in parts by mass: 100 parts of low-density polyethylene, 1.8 parts of dicumyl peroxide, 0.4 parts of triallyl cyanurate, 0.2 parts of antioxidant 1010, 3 parts of nanometer vinyl cage polysilsesquioxane and 30 parts of boron nitride; Boron nitride composition, the mass ratio of boron nitride with a particle size of micron and boron nitride with a particle size of nanometer is 3:1.

[0033] Wherein boron nitride is hexagonal boron nitride, and the average median particle diameter of micron-scale boron nitride is 10 μm; the average median particle diameter of nanometer-scale boron nitride is 50 nm. The purity is 99.1%; the density of low-density polyethylene is 0.9210g / cm 3 , The melt flow rate is 1.5g / 10min, the gel content is 86%; the melting point of nano vinyl cage polysilsesquioxane is 360°C, and the flash point is 210°C.

[0034] This embodiment also provid...

Embodiment 2

[0039] This embodiment provides a cross-linked polyethylene composite material, comprising the following components by mass: 100 parts of low-density polyethylene, 1.9 parts of ethylene peroxide, 0.3 parts of triallyl isocyanurate, 0.25 parts Parts of antioxidant 1035, 2 parts of nano vinyl cage polysilsesquioxane and 35 parts of boron nitride; The composition of boron, the mass ratio of boron nitride with a particle size of micron and boron nitride with a particle size of nanometer is 4:1.

[0040] Wherein boron nitride is hexagonal boron nitride, and the average median particle diameter of micrometer-sized boron nitride is 5 μm; the average median particle diameter of nanometer-sized boron nitride is 40 nm, The purity is 99.1%; the density of low-density polyethylene is 0.9220g / cm 3 , The melt flow rate is 0.9g / 10min, the gel content is 84%; the melting point of nano vinyl cage polysilsesquioxane is 355°C, and the flash point is 205°C.

[0041] This embodiment also provide...

Embodiment 3

[0046] This embodiment provides a cross-linked polyethylene composite material, comprising the following components in parts by mass: 100 parts of low-density polyethylene, 2 parts of dicumyl peroxide, 0.5 part of trimethylolpropane trimethacrylate , 0.3 parts of antioxidant 300, 4 parts of nano vinyl cage polysilsesquioxane and 40 parts of boron nitride; The composition of boron nitride, the mass ratio of boron nitride with a particle size of micron and boron nitride with a particle size of nanometer is 6:1.

[0047] Wherein boron nitride is hexagonal boron nitride, and the average median particle diameter of micron-scale boron nitride is 15 μm; the average median particle diameter of nanometer-scale boron nitride is 60 nm. The purity is 99.1%; the density of low-density polyethylene is 0.9230g / cm 3 , The melt flow rate is 2.1g / 10min, the gel content is 82%; the melting point of nano vinyl cage polysilsesquioxane is 350°C, and the flash point is 200°C.

[0048] This embodim...

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Abstract

The invention discloses a crosslinked polyethylene composite material as well as a preparation method and application thereof, and belongs to the technical field of high-voltage alternating-current cable insulation. The crosslinked polyethylene composite material is prepared from the following components in parts by mass: 100 parts of low-density polyethylene, 1.8 to 2 parts of a cross-linking agent, 0.3 to 0.5 part of an assistant cross-linking agent, 0.2 to 0.3 part of an antioxidant, 2 to 4 parts of nano vinyl polyhedral oligomeric silsesquioxane and 30 to 40 parts of boron nitride, wherein the boron nitride is composed of boron nitride with a micron-scale particle size and boron nitride with a nano-scale particle size, and the mass ratio of the boron nitride with the micron-scale particle size to the boron nitride with the nano-scale particle size is (2-6): 1. According to the crosslinked polyethylene composite material disclosed by the invention, the nano vinyl polyhedral oligomeric silsesquioxane and the boron nitride are taken as additives, so that the insulation and high-voltage alternating current breakdown resistance of the crosslinked polyethylene composite material can be effectively improved.

Description

technical field [0001] The invention relates to the technical field of high-voltage AC cable insulation, in particular to a cross-linked polyethylene composite material and its preparation method and application. Background technique [0002] In recent years, my country's urbanization process has continued to advance, urban electricity demand has continued to increase, cable transmission voltage levels have developed from 110kV, 220kV to 500kV, and the average annual growth rate of high-voltage cable transmission lines has reached 13%. The cable industry has broad prospects for development. Compared with oil-paper insulation, cross-linked polyethylene (XLPE) has significant advantages in the application of power cables. At present, XLPE tends to be used as the main insulation in the world from 35kV medium and low voltage cables to 110kV and above high voltage cables. Compared with polyethylene (PE), cross-linked polyethylene (XLPE) has a three-dimensional network macromolec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L83/07C08K9/10C08K3/38H01B3/44
CPCC08L23/06H01B3/441C08K2003/385C08K2201/011C08L2207/066C08K2201/003C08L2312/00C08L2203/202C08L83/04C08K9/10C08K3/38
Inventor 朱闻博黎小林傅明利侯帅惠宝军冯宾张逸凡伍国兴谢宏徐曙陈潇
Owner ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD
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