Chemical grafting modified polypropylene capacitor film material as well as preparation method and application thereof

By introducing diethylenetriamineethyl acrylate into the polypropylene molecular chain, a chemically grafted modified polypropylene capacitor film material was prepared, which solved the problem of moisture corrosion, improved the material's corrosion resistance and breakdown resistance, and extended the service life of the film capacitor.

CN120737264AActive Publication Date: 2025-10-03ELECTRIC POWER RES INST CHINA SOUTHERN POWER GRID CO LTD
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Patent Information

Application Number
CN202510868765.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-06-26
Publication Date
2025-10-03
Estimated Expiration
2045-06-26

AI Technical Summary

Technical Problem

Existing polypropylene capacitor film materials are easily corroded by residual moisture during use, resulting in performance degradation and shortened lifespan. Existing methods for removing moisture are limited in effectiveness.

Method used

By introducing diethylenetriamineethyl acrylate into the polypropylene molecular chain, using esterification reaction and chemical grafting reaction, a chemically grafted modified polypropylene capacitor film material is prepared, and specific groups such as amino and carboxyl groups are introduced to adsorb and remove moisture and improve breakdown resistance.

Benefits of technology

The corrosion resistance and breakdown resistance of polypropylene capacitor film materials are significantly improved, and the service life of film capacitors is extended.

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Abstract

The invention belongs to the technical field of thin film capacitors, and particularly relates to a chemical grafting modified polypropylene capacitor film material and a preparation method and application thereof. According to the preparation method of the chemical grafting modified polypropylene capacitor film material, provided by the invention, diethylenetriamine ethyl acrylate with a plurality of specific groups such as amino groups and carboxyl groups and unsaturated double bonds is synthesized through esterification reaction, and the diethylenetriamine ethyl acrylate is introduced into a polypropylene material through chemical grafting to obtain chemical grafting modified polypropylene; the prepared polypropylene capacitor film material has the excellent properties of good compatibility, difficulty in film breakage, capability of adsorbing and removing residual moisture, difficulty in oxidation corrosion, excellent breakdown resistance and the like, and the preparation method is a preparation method of the high-performance polypropylene capacitor film material; therefore, the technical problem that a polypropylene capacitor film material prepared in the prior art is low in performance is solved.
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