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Thermoplastic high-voltage cable insulation material and preparation method thereof

A high-voltage cable and insulating material technology, applied in plastic/resin/wax insulators, insulators, organic insulators, etc., can solve problems such as breakdown strength drop, space charge accumulation, agglomeration, etc., to suppress space charge injection and improve volume resistance. rate, the effect of enhancing thermal stability

Active Publication Date: 2021-03-09
SHANGHAI JIAOTONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This cable has several disadvantages
One is that the XLPE insulation is difficult to recycle after the service of the cable, causing great environmental pressure; the other is that the cross-linked by-products are likely to cause space charge accumulation under the DC electric field, which seriously affects the service life of the cable, making conventional XLPE Insulated power cables cannot be used in high-voltage direct current transmission occasions; third, degassing is required in the cable production process, the process is complex and the production environment is harsh
Due to the extremely high resistivity of polyolefin insulating materials, charges are easily accumulated after injection, resulting in localized electric field concentration or distortion, resulting in a significant drop in breakdown strength
Adding inorganic nanoparticles to polyolefin insulation can suppress space charge injection, however, since most inorganic nanoparticles are incompatible with the polymer matrix, they are easily agglomerated in polyolefin, resulting in a significant decrease in the breakdown strength of the insulating material. Limiting the application of polyolefin insulation materials in high voltage cables

Method used

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  • Thermoplastic high-voltage cable insulation material and preparation method thereof
  • Thermoplastic high-voltage cable insulation material and preparation method thereof
  • Thermoplastic high-voltage cable insulation material and preparation method thereof

Examples

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Embodiment 1

[0045]This embodiment relates to a thermoplastic high pressure cable insulating material, the insulating material from 90 parts of the polypropylene copolymer as a matrix, 6 parts of 2-amino-3- (3, 4 - Dihydroxyphenyl) propionic acid -1H, 1H, 2H, 2H-全fluorogen modified titanate nanoparticles are composed of fillers. Among them, 2-amino-3- (3,4-dihydroxyphenyl) propionic acid - 1H, 1H, 2H, 2H-perfluorogen modified titanate nanoparticles were prepared by the following steps:

[0046]A. Dopamine having a long chain structure: 1H, 1H, 2H, 2H-full fluorohyllol and L-3,4-dihydroxybenzlanine reaction, to give 2-amino-3- (3,4-dihydroxy) Phenyl) propionic acid - 1H, 1H, 2H, 2H-全fluorogene. This method of synthesis of dopamine having a long chain structure (Manolakis, i.Et Al., Macromol.rapid Commun.2014, 35, 71-76.).

[0047]B. Dopamine-modified titanate nanoparticles of long chain structure: 2-amino-3- (3,4-dihydroxyphenyl) propionic acid - 1H, 1H, 2H, 2H-全 酯 解In isopropyl alcohol, the titanium d...

Embodiment 2

[0050]This embodiment relates to a thermoplastic high voltage cable insulating material, the insulating material consisting of 90 parts of polypropylene and 10 parts of the propylene-ethylene copolymer as a matrix, 5 parts of 2-amino-3- (3, 4- Dihydroxy phenyl) propionate modification of nanoparticles are composed as filler. Among them, 2-amino-3- (3,4-dihydroxyphenyl) propionate modified barium titanate nanoparticles were prepared by the following steps.

[0051]A. Dopamine having a long chain structure: 1-decanol is reacted with L-3,4-dihydroxybenzophenine to give 2-amino-3- (3,4-dihydroxyphenyl) propionate. This method of synthesis of dopamine having a long chain structure (Manolakis, i.Et Al., Macromol.rapid Commun.2014, 35, 71-76.).

[0052]C. Dopamine-modified titanate nanoparticles of the long chain structure: 2-amino-3- (3,4-dihydroxyphenyl) propionate is dissolved in isopropyl alcohol while strontium titanate nano The particles are dispersed in a hydrochloric acid buffer of three...

Embodiment 3

[0055]This embodiment relates to a thermoplastic high voltage cable insulating material, the insulating material from 100 parts of the like polypropylene as a substrate and 4 parts of 2-amino-3- (3,4-dihydroxyphenyl) propionic acid-1H , 1H, 2H, 2H-perfluorogen-modified magnesium oxide nanoparticles consist as filler. Among them, the preparation step of 2-amino-3- (3,4-dihydroxyphenyl) propionate modification of zitride-modified magnesium oxide nanoparticles is different, and the nanoparticles used are magnesium oxide.

[0056]This example also relates to a method of preparation of a thermoplastic high voltage cable insulating material, the method is 100 parts of the like polypropylene, 4 parts of a dopamine-modified magnesium oxide nanoparticle 1010 and 0.1 parts. The antioxidant 168 was added to the mesh, mixed at 200 ° C for 8 minutes to give a thermoplastic high voltage cable insulating material.

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Abstract

The invention discloses a thermoplastic high-voltage cable insulating material and a preparation method thereof. The insulating material comprises the following components in parts by weight: 100 parts of polyolefin resin; 0.1-6 parts of dopamine-modified nanoparticles; antioxidant 0.1-0.5 parts; the dopamine is modified dopamine; the nanoparticles are inorganic nanoparticles. In the present invention, the nanoparticles are first grafted and modified with dopamine having a long-chain structure, and the dopamine with a long-chain structure can not only improve the dispersion of nanoparticles, but also improve the thermal stability of thermoplastic cable insulation materials, and can also Significantly suppresses the injection of space charges. The thermoplastic high-voltage cable insulating material prepared by the invention has excellent mechanical, thermal and insulating properties, and also has the characteristics of easy processing, and is suitable for cable insulation, especially for high-voltage DC cable insulation.

Description

Technical field[0001]The present invention belongs to the technical field of cable insulating material, and more particularly to a thermoplastic high voltage cable insulating material and a preparation method thereof.Background technique[0002]The extruded insulated plastic power cable has a small size, light quality, easy to lay, and easy maintenance, it is widely used in the transmission and distribution project. However, most of the extruded insulated plastic cables currently used are crosslinked polyethylene insulated cables. This cable has several disadvantages. First, the cross-linking polyethylene insulation is difficult to recover after the end of the cable service, causing a large environmental pressure; second, cross-linking by-products easily cause spatial charge agglomeration under DC electric field, seriously affecting the service life of the cable, so that conventional cross-linking polyethylene Insulated power cables cannot be used in high-voltage DC transmission; thir...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/12C08L23/14C08L23/08C08K9/04C08K3/24C08K3/22C08K3/36C08K3/38H01B3/44
CPCC08K3/22C08K3/36C08K9/04C08K2003/222C08K2003/2227C08K2003/2244C08K2003/385C08K2201/011C08L23/12C08L2201/08C08L2203/202H01B3/441C08L23/14C08K3/24C08L23/0815C08K2003/2296
Inventor 黄兴溢江平开张军周雁
Owner SHANGHAI JIAOTONG UNIV
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