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High voltage cable thermoplastic semiconducting shielding material and preparation method thereof

A technology for shielding materials and high-voltage cables, applied in the field of high-voltage cables, can solve problems such as low resistivity and low volume resistivity, and achieve the effects of improving stability, simple preparation process and reducing volume resistivity

Active Publication Date: 2019-11-26
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies in the performance of the existing semi-conductive shielding materials for high-voltage cables, and provide a thermoplastic semi-conductive shielding material for high-voltage cables with low volume resistivity and low temperature dependence of resistivity and its preparation method

Method used

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  • High voltage cable thermoplastic semiconducting shielding material and preparation method thereof
  • High voltage cable thermoplastic semiconducting shielding material and preparation method thereof
  • High voltage cable thermoplastic semiconducting shielding material and preparation method thereof

Examples

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Embodiment 1

[0048] This embodiment relates to a thermoplastic semi-conductive shielding material for high-voltage cables; the material consists of 20 parts of polypropylene, 35 parts of ethylene-octene copolymer elastomer, 24 parts of conductive carbon black, 0.4 part of MXene-CNT composite conductive powder, Composed of 1.2 parts of lubricating dispersant and 0.5 parts of antioxidant.

[0049] The preparation method of the high-voltage cable thermoplastic semi-conductive shielding material comprises the following steps:

[0050] 1) Preparation of conductive masterbatch pellets containing carbon black:

[0051] 100 parts of grade 8200 ethylene-octene copolymer elastomer POE, 70 parts of nano conductive carbon black LK2017, 3.5 parts of lubricant ethylene bisoleic acid amide, 1.5 parts of antioxidant 4,4'-thiobis(6- tert-butyl-3-methylphenol), uniformly mixed in an internal mixer, the rotating speed is 50rpm, and the mixing temperature is 150°C. Immediately extrude and granulate with sin...

Embodiment 2

[0064] This embodiment relates to a semi-conductive shielding material for high-voltage cables; the material consists of 20 parts of polypropylene, 35 parts of ethylene-octene copolymer elastomer, 24 parts of conductive carbon black, 0.4 part of MXene-GNS composite conductive powder, 1.2 1 part lubricating dispersant, 0.5 part antioxidant.

[0065] The preparation method of the high-voltage cable thermoplastic semi-conductive shielding material comprises the following steps:

[0066] 1) The preparation of the conductive masterbatch pellets containing carbon black is the same as in Example 1.

[0067] 2) Preparation of MXene-GNS composite conductive powder:

[0068] Mix the 1 mg / mL ethanol solution of the MXene powder obtained by exfoliation with the 1 mg / mL graphene ethanol solution at a ratio of 1:1 to the mass ratio of the conductive component, ultrasonically disperse, filter, wash to remove ethanol, and freeze-dry to obtain MXene-GNS composite filler. The scanning electr...

Embodiment 3

[0073] This embodiment relates to a semi-conductive shielding material for high-voltage cables; the material consists of 20 parts of polypropylene, 35 parts of ethylene-octene copolymer elastomer, 24 parts of conductive carbon black, 0.4 part of GNS-CNT composite conductive powder, 1.2 1 part lubricating dispersant, 0.5 part antioxidant.

[0074] The preparation method of the high-voltage cable thermoplastic semi-conductive shielding material comprises the following steps:

[0075] 1) The preparation of the conductive masterbatch pellets containing carbon black is the same as in Example 1.

[0076] 2) Preparation of GNS-CNT composite conductive powder:

[0077] Disperse graphene and carbon nanotubes in 200ml of deionized water at a mass ratio of 3:1, 1:1, and 1:3, so that the concentrations of graphene and carbon nanotubes are both 1mg / mL, and add 1.6g Sodium dodecyl sulfonate, ultrasonically dispersed, filtered, washed to remove sodium dodecyl sulfonate, freeze-dried. Prep...

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Abstract

The invention provides a high voltage cable thermoplastic semiconducting shielding material and a preparation method thereof. The material is composed of the following components by weight: 15-40 parts of polypropylene, 30-50 parts of a polyolefin elastomer, 15-40 parts of conductive carbon black, 0.1-5.0 parts of an MXene-graphene (MXene-GNS) or MXene-carbon nanotube (MXene-CNT) or graphene-carbon nanotube (GNS-CNT) composite conductive powder, 0.5-10 parts of a lubricating dispersant, and 0.5-5.0 parts of an antioxidant. According to the invention, by adding the composite conductive filler,the dosage of conductive carbon black is reduced, and the processability of the shielding material is improved; the obtained semiconducting shielding material has high electrical conductivity, good conductivity temperature stability, good heat resistance and mechanical performance, and at the same time is non-crosslinked, green and environment-friendly.

Description

technical field [0001] The invention belongs to the technical field of high-voltage cables, and relates to a thermoplastic semi-conductive shielding material for high-voltage cables and a preparation method thereof. Background technique [0002] Power cables are composed of metal conductors, conductor shields, insulation, insulation shields and protective materials. Among them, the semi-conductive shielding layer plays the role of uniform conductor surface electric field or grounding, and its performance greatly affects the performance of the cable. The shielding material of traditional XLPE insulated cables mainly uses ethylene polymers as the matrix, such as the copolymer of ethylene and ethyl acrylate (EEA) or the copolymer of ethylene and vinyl acetate (EVA), adding conductive Carbon black forms a conductive network. However, EVA and EEA are often used as shielding materials for medium and low voltage cables. Under high voltage, a small amount of acidic substances (suc...

Claims

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Application Information

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IPC IPC(8): C08L23/08C08L23/12C08K13/02C08K3/04
CPCC08K2201/001C08K2201/011C08L23/0815C08L2203/20C08L23/12C08K13/02C08K3/04C08K3/041C08K3/042
Inventor 黄兴溢孙博阳江平开张军
Owner SHANGHAI JIAO TONG UNIV
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