炭黑种类及浓度对高压电缆半导体屏蔽材料性能的影响,Journal of Polymer Science

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炭黑种类及浓度对高压电缆半导体屏蔽材料性能的影响
Journal of Polymer Science ( IF 3.9 ) Pub Date : 2023-09-15 , DOI: 10.1002/pol.20230356
Tianyao Liu ₁ , Hao Guo ₁ , Xuejing Li ₁ , Lu Liu ₁ , Guochang Li ₁ , Yanhui Wei ₁ , Chuncheng Hao ₁ , Yuanwei Zhu ₂

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半导体屏蔽层作为高压电缆的重要组成部分，其性能直接影响电缆的安全运行和使用寿命。炭黑（CB）是屏蔽材料的主要导电填料，其类型和浓度直接影响屏蔽层的性能。本文采用较高结构的CB-A和较低结构的CB-B作为导电填料，选择EBA作为基体树脂制备屏蔽材料。屏蔽材料的 CB 浓度为 35、45 和 55 phr。研究了CB类型和浓度对屏蔽材料的理化、电学、热学和机械性能的影响。研究表明，当CB种类相同时，CB浓度越高，屏蔽材料中的CB网络越密集，CB结块现象越严重。随着CB浓度的增加，屏蔽材料表现出体积电阻率下降的趋势、导热系数上升的趋势、机械性能下降的趋势。当CB浓度相同时，CB-A在基体树脂中分散性较好，CB-A/EBA屏蔽材料具有较低的体积电阻率和较弱的PTC效应，CB-A/EBA屏蔽材料在低温下具有较高的导热系数并且CB-B/EBA屏蔽材料在高温下具有更高的导热系数，CB-A/EBA屏蔽材料具有更好的机械性能。综合比较表明，浓度为45份的CB-A/EBA屏蔽材料具有优异的综合性能，25℃和90℃时的体积电阻率分别为15.3和68Ω·cm。室温下的导热率为 0.434 W/(m·K)，90°C 下的导热率为 0.536 W/(m·K)。应力为31.08 MPa，应变为570.2%。该工作对于导电填料的选择以及半导体屏蔽材料的性能提升具有重要的参考意义。

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Effect of carbon black type and concentration on the performance of semiconductive shielding material of high-voltage cable

Semiconductive shielding layer as an important part of high-voltage cable, its performance directly affects the safe operation and the service life of the cable. Carbon black (CB) is the main conductive filler of shielding materials, and its type and concentration directly affect the performance of the shielding layer. In this paper, CB-A with higher structure and CB-B with lower structure were used as conductive fillers and EBA was chosen as the matrix resin to prepare the shielding materials. The CB concentrations of the shielding materials were 35, 45, and 55 phr. The influences of CB type and concentration on the physicochemical, electrical, thermal and mechanical properties of the shielding materials were investigated. The research shows that when the CB types are the same, the higher the concentration of CB, the more intensive the CB network in the shielding material, and the more serious the CB agglomeration phenomenon. With increasing CB concentration, shielding materials show a decreasing trend of volume resistivity, an increasing trend of thermal conductivity, and a decreasing trend of mechanical properties. When the CB concentration is the equal, the CB-A has better dispersion in the matrix resin, CB-A/EBA shielding material has lower volume resistivity and weaker PTC effect, CB-A/EBA shielding material has higher thermal conductivity at low temperature and CB-B/EBA shielding material has higher thermal conductivity at high temperature, CB-A/EBA shielding material has better mechanical properties. A comprehensive comparison shows that CB-A/EBA shielding material with a concentration of 45 phr has excellent overall performance, with volume resistivity of 15.3 and 68 Ω·cm at 25°C and 90°C, respectively. The thermal conductivity is 0.434 W/(m K) at room temperature and 0.536 W/(m K) at 90°C. The stress is 31.08 MPa and the strain is 570.2%. This work has important reference for the selection of conductive fillers and performance improvement of semiconductive shielding materials.

更新日期：2023-09-15

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