Polyurethane elastomer composite material with low modulus and high dielectric constant, and preparation method of composite material

A technology of polyurethane elastomer and composite material is applied in the field of dielectric elastomer preparation to achieve the effect of improving movement ability and polarization ability

Active Publication Date: 2013-06-12
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This polyurethane elastomer molecular composite material with low modulus and high dielectric constant can obtain high electrical deformation under very low external field voltage, which solves the problem that dielectric elastomers need to produce large electrical deformation under high voltage in traditional methods

Method used

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  • Polyurethane elastomer composite material with low modulus and high dielectric constant, and preparation method of composite material
  • Polyurethane elastomer composite material with low modulus and high dielectric constant, and preparation method of composite material
  • Polyurethane elastomer composite material with low modulus and high dielectric constant, and preparation method of composite material

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Experimental program
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Effect test

Embodiment 1

[0022] Using polyurethane elastomer as a matrix and polyethylene glycol as an organic small molecule filler, a polyurethane elastomer molecular composite material with low modulus and high dielectric constant is prepared. The specific operation steps are: (1) Dissolve 100g of thermoplastic polyurethane elastomer in In 1500g of tetrahydrofuran, heat and stir at 66°C to dissolve into a transparent solution; (2) Add 5g of polyethylene glycol small molecule filler with a molecular weight of 600, continue heating and stirring until the polyethylene glycol is completely dissolved; (3) Pour the solution into a thick In a square mold with a diameter of 2 cm and a length of 8 cm, place it in a ventilation device for 6 hours, and after the solvent in the solution is completely volatilized, a polyurethane elastomer molecular composite material with low modulus and high dielectric constant is obtained.

[0023] The thermoplastic polyurethane elastomer used above is Soft45A polyester poly...

Embodiment 2

[0027] Using polyurethane elastomer as a matrix and polyethylene glycol as an organic small molecule filler, a polyurethane elastomer molecular composite material with low modulus and high dielectric constant is prepared. The specific operation steps are: (1) Dissolve 100g of thermoplastic polyurethane elastomer in In 1800g tetrahydrofuran, heat and stir at 66°C to dissolve into a transparent solution; (2) Add 15g of polyethylene glycol small molecule filler with a molecular weight of 600, continue heating and stirring until the polyethylene glycol is completely dissolved; (3) Pour the solution into a thickness of In a square mold with a length of 2 cm and a length of 8 cm, place it in a ventilation device for 6 hours. After the solvent in the solution is completely volatilized, a polyurethane elastomer molecular composite material with low modulus and high dielectric constant is obtained.

[0028] The thermoplastic polyurethane elastomer used above is Soft45A polyester polyu...

Embodiment 3

[0032] Using polyurethane elastomer as a matrix and polyethylene glycol as an organic small molecule filler, a polyurethane elastomer molecular composite material with low modulus and high dielectric constant is prepared. The specific operation steps are: (1) Dissolve 100g of thermoplastic polyurethane elastomer in In 2000g acetone, heat and stir at 56°C to dissolve into a transparent solution; (2) Add 30 parts by mass of polyethylene glycol small molecule filler with a molecular weight of 200, and continue heating and stirring until the polyethylene glycol is completely dissolved; (3) Pour the solution into In a square mold with a thickness of 2 cm and a length of 8 cm, place it in a ventilation device for 6 hours. After the solvent in the solution is completely volatilized, a polyurethane elastomer molecular composite material with low modulus and high dielectric constant is obtained.

[0033] The thermoplastic polyurethane elastomer used above is Soft45A polyester polyuret...

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Abstract

The invention discloses a polyurethane elastomer composite material with a low modulus and a high dielectric constant, and a preparation method of the composite material, and belongs to the technical field of dielectric elastomer preparation. The composite material is added with small organic molecules which have a low dielectric constant and can form a hydrogen bond with a hydrogen proton, and the small organic molecules exist at a molecular level in the material so as to break down the interaction force among the molecular chains of an elastomer and change the movement capability and polarization capability of the molecular chains, and therefore, a dielectric elastomer composite material achieves a high dielectric effect. In addition, the added small organic molecules play a plasticizer role, thereby lowering the modulus of the composite material. The polyurethane elastomer composite material with the low modulus (2.10-0.23MPa) and the high dielectric constant (18-3500) can generate high electro-deformation under a very low outer field voltage, and the problem that the dielectric elastomer in the traditional method needs a high voltage to generate high electro-deformation is solved. Besides, the preparation method is simple, easy to operate, and easy to control in technology.

Description

Technical field: [0001] The invention belongs to the technical field of dielectric elastomer preparation, in particular to a polyurethane elastomer molecular composite material with low modulus and high dielectric constant and a preparation method thereof. technical background: [0002] Dielectric elastomers have the advantages of large electromechanical deformation, fast response, high energy density, low modulus, high electromechanical coupling coefficient and simple working principle. Therefore, the research and development of dielectric elastomer actuators has become a hot spot in the past decade. However, the requirement of high driving voltage (100kV / mm) for dielectric elastomer actuators greatly limits its application in some fields, especially the biomedical field. Therefore, to develop dielectric elastomers into a reliable micro-actuation technology, the key lies in reducing the driving voltage of dielectric elastomers so that they can produce large enough deformat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/04C08L71/08C08K5/053C08K5/3432
Inventor 宁南英颜丙越田明张立群刘苏亭
Owner BEIJING UNIV OF CHEM TECH
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