Zwitter-ion modified acrylate dielectric elastomer film and preparation method thereof

The method of preparing acrylate dielectric elastomer films modified by zwitterions solves the problems of electromechanical instability and insufficient self-healing of dielectric elastomer materials without pre-stretching, and realizes dielectric elastomer materials with high breakdown field strength, high energy density and self-healing ability.

CN120795247APending Publication Date: 2025-10-17NINGXIA UNIVERSITY
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Patent Information

Application Number
CN202511014640.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-07-23
Publication Date
2025-10-17

AI Technical Summary

Technical Problem

Existing dielectric elastomer materials suffer from electromechanical instability, insufficient driving performance, and insufficient self-healing ability without pre-stretching, making it difficult to meet the requirements of high energy density and high frequency operation.

Method used

A zwitterionic modified acrylate dielectric elastomer film preparation method was adopted, which prepared uniformly distributed zwitterionic clusters through photo-initiated free radical polymerization reaction, thereby improving the breakdown field strength and self-healing ability of the material.

Benefits of technology

A dielectric elastomer material with high breakdown field strength and high energy density is achieved, with self-healing properties, which prolongs the service life and improves driving performance.

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Abstract

The invention discloses a zwitter-ion modified acrylate dielectric elastomer film and a preparation method thereof. Zwitter-ions can be selected from sulfobetaine methacrylate (SBMA), carboxyl betaine methacrylate (CBMA), sulfobetaine acrylamide (SBAA) and the like. The acrylate monomer can be butyl acrylate (BA), dodecyl acrylate (LA), isoamyl acrylate (EHA) and the like. Zwitterions (special compounds which simultaneously carry equal positive and negative charges on the same molecule and are electrically neutral on the whole) are copolymerized into an acrylate dielectric elastomer through photo-initiated free radical polymerization reaction, zwitterionic clusters uniformly distributed in the dielectric elastomer can construct traps for capturing high-energy electrons, the leakage current of the material is reduced, and the dielectric property of the material is improved. And the intrinsic breakdown field strength of the material is improved. In addition, the mutual attraction effect between dipole ions with positive and negative charges in the structure provides driving force for intrinsic self-repairing. And after being electrically and mechanically damaged, the material can be self-recovered, so that the service life of the material is prolonged.
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