Preparation method of diene dielectric elastomer

Abstract

The invention discloses a method for preparing a diene dielectric elastomer. First, the diene rubber is dissolved in a reaction medium, and reacted with an epoxidation reagent first, and then with an oxidative degradation reagent through a one-pot reaction method to prepare a diene dielectric elastomer. The aldehyde-terminated diene liquid rubber is obtained; then, by solution mixing method, the aldehyde-terminated diene liquid rubber, amino-terminated polyetheramine, high dielectric solvent, and multifunctional aldehyde-based crosslinking agent are mixed in an organic solvent, and the solvent is evaporated After heating and curing, a diene dielectric elastomer is obtained. The present invention uses aldehyde group-terminated diene rubber as the matrix, amino-terminated polyetheramine as the compatibilizer, realizes the chain extension of the rubber matrix through the aldehyde-amine condensation reaction and improves the polarity of the molecular chain, and improves the relationship between the rubber matrix and the high dielectric solvent. Compatibility, and the use of multifunctional aldehyde-based crosslinking agents to achieve crosslinking of the rubber matrix, ultimately endowing the diene material with a high dielectric constant while retaining low mechanical modulus, dielectric loss and electrical conductivity. The invention belongs to the technical field of preparation of dielectric elastomers.

Description

technical field [0001] The invention belongs to the technical field of preparation of dielectric elastomers and is used for preparing dielectric elastomers with high dielectric properties, in particular to a preparation method of diene dielectric elastomers. Background technique [0002] Dielectric elastomer is a kind of intelligent soft material that undergoes large deformation under the excitation of an external electric field and realizes the mutual conversion of electrical energy and mechanical energy. It is considered to be a new generation of artificial muscles. Soft robots, aerospace, intelligent medical devices, wearable devices and other fields have great application potential. [0003] In practical applications, dielectric elastomers need to meet performance requirements such as high dielectric constant, low mechanical modulus, dielectric loss, and electrical conductivity. [0004] At present, the common commercial dielectric elastomers are mostly acrylate-based e...

AI Technical Summary

Problems solved by technology

The former nano-dielectric particles are difficult to disperse in the rubber matrix, and the interface compatibility between the rubber matrix and the particles is poor, and the dielectric constant of the rubber material must be effectively improved through fine interface design and modification.

The latter often involves a complicated and time-consuming chemical modification process, and the introduction of highly polar groups is difficult to effectively control, resulting in the inability to effectively control the dielectric constant of the modified rubber material.

In addition, when the above method increases the dielectric constant of the hydrocarbon rubber material, it is inevitably accompanied by a substantial increase in the material's mechanical modulus, dielectric loss, and electrical conductivity, which limits the practical application of the material in the field of dielectric elastomers.

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