Self-repaired material for cable sheath and preparation method

Abstract

The invention belongs to the field of self-repaired materials and provides a self-repaired material for a cable sheath and a preparation method. The preparation method comprises the following steps: mixing and kneading nano calcium silicate powder, nano calcium aluminate powder and a hyperbranched polymer so as to obtain modified nano micro particles, drying, performing ultrasonic dispersion in warm water with dimethyl formamide and polyvinylpyrrolidone, further stirring with a dried fiber raw material so as to obtain a film casting liquid, performing hollow spinning so as to obtain a hollow fiber filled with the modified nano micro particles, coating the hollow fiber with a phase-change themogenesis material, and enabling the hollow fiber to be adhered to the gap between a cable sheath layer and an insulating layer, thereby obtaining the self-repaired material for the cable sheath. Compared with a conventional method, the preparation method has the advantages that the hollow fiber ofthe self-repaired material for the cable sheath has relatively good protection performance upon a repairing agent, the effectiveness of the repairing material can be ensured, meanwhile the hyperbranched polymer is good in flowability, good in dispersability and rapid in reaction in repairing and high in repairing efficiency, the service life of an insulating material is effectively prolonged, theproduct security is improved, and meanwhile the material is simple in whole preparation process, simple in raw materials, relatively low in cost and feasible in industrial production.

Description

technical field [0001] The invention belongs to the technical field of self-repairing materials, and provides a self-repairing material for cable sheaths and a preparation method. Background technique [0002] In recent years, polymer materials have been more and more widely used in industry and life due to their light weight, wear resistance and easy processing. microcracks. These microcracks are the root of macroscopic cracks, which will destroy the integrity of polymer materials, so as to affect their performance and service life, such as damage to the mechanical strength of polymer fibers, cause circuit errors in polymer microelectronics, and affect high-molecular materials. The viscosity of molecular materials, etc. Because the cracks of polymer materials often appear deep inside, it is more difficult to detect than ordinary metal materials. Therefore, using the ease of processing of polymer materials to study biomimetic self-healing materials has emerged as the time...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a self-repairing material for cable sheath and its preparation method, which can solve the problems of poor polymer fluidity, less repair times, low repair efficiency, short service life and poor safety during self-repair of traditional electrical insulating materials.