Electromechanical response estimation method of novel electroactive polymer

Abstract

The invention discloses an electromechanical response estimation of a novel electroactive polymer. The novel electroactive polymer comprises an elastic membrane and flexible electrodes at the two sides of the elastic membrane, the flexible electrodes are uniformly coated on the upper and lower surfaces of the elastic membrane, the thickness of the electrodes is lower than that of the elastic membrane, the young modulus of the electrodes is lower than that of the elastic membrane, and the flexible electrodes are connected with anode and cathode of an external voltage respectively. The elastic membrane is of a dielectric elastomer material of a negative Poisson's ratio, the material is prepared by applying compression force in three orthogonal directions to a porous dielectric elastomer material when the porous material is heated to the temperature slightly higher than the heat softening temperature range. Via the method, the novel electroactive polymer has a higher electromechanical performance than a traditional dielectric electroactive polymer.

Description

technical field [0001] The invention relates to an electroactive polymer, in particular to a method for estimating the electromechanical response of a novel electroactive polymer. Background technique [0002] Negative Poisson's ratio material, also known as auxetic, is a new type of functional material with a negative Poisson's ratio. When the material is stretched and deformed, it will expand laterally in the direction perpendicular to the load; When a material undergoes compression deformation, it contracts laterally in the direction perpendicular to the load. Therefore, the material will automatically concentrate on the loading place so that it can bear the load more effectively, and the stiffness of the material will also increase non-linearly with the increase of the load, so the negative Poisson's ratio material has a higher shear modulus and resilience toughness , with excellent mechanical properties. [0003] Electroactive polymers are a new class of flexible func...

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Problems solved by technology

[0004] Under the excitation of electric field and voltage, traditional dielectric electroactive polymers will accumulate positive and negative charges at the flexible electrodes on both sides, thereby generating electrostatic effects and forming Coulomb force. Coulomb force acts on the thickness direction of electroactive polymers. The electroactive polymer is compressed along the thickness direction and laterally stretched, the thickness dimension decreases and the area increases. As the thickness of the electroactive polymer continues to decrease, problems such as mechanical damage, electrical breakdown, and electromechanical coupling instability are prone to occur. , which is not conducive to the large-scale application of electroactive polymers

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