End chain functional graphene modified intelligent energy cable, shielding material and manufacturing method thereof

Abstract

The invention discloses an end chain functional graphene modified intelligent energy cable, a shielding material and a manufacturing method thereof. The cable sequentially comprises a cable core, a wrapping tape and an outer sheath from interior to exterior, wherein the cable core comprises one or three insulated cable cores; each insulated cable core sequentially comprises a conductor, an end chain functional graphene modified conductor shielding layer, an insulating layer, an end chain functional graphene modified insulated shielding layer and a copper strip shielding layer from interior to exterior; and the end chain functional graphene modified conductor shielding layer, the insulating layer and the end chain functional graphene modified insulated shielding layer are of a three-layer co-extrusion structure. According to the cable disclosed by the invention, the conductor shielding and insulating and smooth and gap-free conductor shielding effects are achieved, so that the safety operation capacity of the cable is improved. Meanwhile, the end chain functional graphene can be uniformly and stably dispersed in a composite material, so that the long-time safety operating stability is further improved.

Description

technical field [0001] The invention relates to an end chain functionalized graphene modified smart energy cable, a shielding material and a manufacturing method. Background technique [0002] For medium and high voltage cables, in order to homogenize the electric field and achieve the purpose of smooth and gapless contact between the conductor and the insulation, and the insulation and the metal shielding layer, national and international standards require that a layer of semi-conductive shielding layer be extruded outside the conductor and the insulating layer . At present, semi-conductive polyolefin composites are mostly made by adding conductive carbon black to polyolefin through mixing, plasticizing, granulating, dehydrating, drying and other processes. However, on the one hand, carbon black has limited conductivity and needs to be added in a large amount. On the other hand, the fineness of the particles is not enough, and the particle size distribution is uneven. The ...

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Problems solved by technology

At present, semi-conductive polyolefin composites are mostly made by adding conductive carbon black to polyolefin through mixing, plasticizing, granulating, dehydrating, drying and other processes. However, on the one hand, carbon black has limited conductivity and needs to be added in a large amount. On the other hand, the fineness of the particles is not enough, and the particle size distribution is uneven. The volume resistivity of the semiconductive polyolefin material compounded from this is between 40 and 100Ω·cm, which is not ideal for shielding the homogenized electric field of cable products. , and the volume resistivity increases further after long-term operation

[0003] Graphene is a new type of material. Due to its unique structure, it has extraordinary electrical conductivity, good mechanical properties and thermal conductivity, and its microchip fineness distribution is uniform and below 10um, so it is listed in patents such as CN203617033U and CN103739929A However, when the cable is operated at high temperature for a long time, the pure graphene powder, like carbon black, will be rearranged in the polymer collective to change the conductive network and increase the volume resistivity.

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