Conductive composite masterbatch for rubber cable shielding material and preparation method thereof

Abstract

The invention discloses a conductive composite master batch used for a rubber cable shielding material and a preparation method thereof. The composite master batch consists of the following components in parts by mass: 40-60 parts of colloidal graphene, 25-40 parts of superconducting carbon black combination, 10-20 parts of paraffin oil; wherein the effective content of conductive substances is 30-45%. First, graphene and pretreatment liquid are made into dispersion liquid, and then blended and grafted with liquid ethylene-propylene rubber and catalyst at high temperature to obtain colloidal graphene, which is then mixed with two different particle sizes of conductive carbon black and paraffin oil to make granules. into a composite masterbatch. After the masterbatch is applied to the shielding material, the use of powder can be greatly reduced, the cleanliness can be easily controlled, the processability, tear resistance and electrical stability can be effectively improved, and the volume resistivity can be greatly reduced. Black powder causes poor processability, easy tearing, low electrical properties and difficult to control cleanliness. The preparation process and products do not need to be dried, the process is short, the energy consumption is low, the use of conventional equipment, easy mass production, and good application prospects .

Description

technical field [0001] The invention relates to the field of modification and application of carbon nano-composite materials, in particular to a conductive composite masterbatch for rubber cable shielding materials and a preparation method thereof. Background technique [0002] Medium and high voltage special rubber cables are widely used in urban power transmission and distribution, ships, rail transit, aerospace, wind power generation, coal mines and other fields, and have high requirements for safety in use. The electric field is evenly distributed to avoid the breakdown of the insulating layer caused by the electrical treeing of the insulating layer. The relevant standards stipulate that semi-conductive shielding materials must be used. It is getting higher and higher. In addition, rubber cables are mostly used in mobile and sports occasions. During the application process, the shielding layer is often fatigued and fractured, which seriously affects the life of the cable...

AI Technical Summary

Problems solved by technology

After the masterbatch is applied to the shielding material, it can effectively reduce the Mooney viscosity, improve the tear resistance, improve the processability, and at the same time greatly reduce the volume resistivity of the shielding material, which solves the poor processability caused by the large amount of carbon black used in the existing shielding material. Poor tear resistance, low electrical performance and difficult to control the cleanliness, and the preparation process and products do not need to be dried, the process is short, low energy consumption, using conventional equipment, easy to mass production, and has a good application prospect

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