Polylactic acid shell of electric energy metering box and preparation method of polylactic acid shell

Abstract

The invention discloses a polylactic acid shell of an electric energy metering box and a preparation method of the polylactic acid shell. The preparation method comprises the following steps: mixing the phase change material, the high-molecular surfactant and an alcohol-water mixed solution in a reaction container; starting a temperature control system to heat the reaction system to 30-100 DEG C under the condition of inert gas protective atmosphere; after the temperature of the reaction system is stable, adding a styrene monomer and an initiator, mixing and stirring at the stirring speed of 200-400r / min; when the reaction is carried out for 11-13 hours, ferromagnetic nanoparticles modified by a high-molecular surfactant are added, and the reaction is continued for 2-4 hours to obtain a phase change microcapsule; the preparation method comprises the following steps: putting polylactic acid into a dryer, and carrying out drying treatment at 55-65 DEG C for 22-26 hours to remove moisture; premixing polylactic acid and the phase change microcapsules, and performing melt extrusion and granulation through a double-screw extruder; and carrying out injection molding on the blended particles through an injection molding machine. Development of electrical branches can be effectively inhibited, the electrical aging process of the material is delayed, the service life of the material is prolonged, and the use safety is improved.

Description

technical field [0001] The invention belongs to the technical field of electrical materials, in particular to a polylactic acid shell of an electric energy metering box and a preparation method thereof. Background technique [0002] Polylactic acid is a new type of green polymer material with excellent biocompatibility, biodegradability and high strength, as well as good electrical and mechanical properties. Devices and other fields have been popularized and applied, especially the polylactic acid shell of the electric energy metering box. Under complex working conditions, such as rain, strong light irradiation, high temperature, etc., the polylactic acid shell of the electric energy metering box will produce bubbles, micro-cracks and other parts. Defects will induce electrical aging processes such as electrical tree branches under the action of an electric field, and further development will lead to insulation damage to the shell material, resulting in electrical and mechan...

AI Technical Summary

Problems solved by technology

[0004] Based on the current problems of discharge defects such as electric branches in the polylactic acid shell of the electric energy metering box, the present invention provides a polylactic acid shell of the electric energy metering box doped with phase-change microcapsules that can inhibit the partial discharge of polylactic acid and its preparation method to improve Safety performance and long-term stability of electric energy metering box polylactic acid shell as electric equipment

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