Process for synthesizing nano barium titanate/polyurethane elastic composite

A polyurethane elastomer and composite material technology, which is applied in the synthesis field of nano-barium titanate/polyurethane elastomer composite materials, can solve the problems of poor electromechanical activity and low dielectric constant, and achieve shortened response time, excellent dielectric properties, Effects of less demanding temperature and pressure conditions

Inactive Publication Date: 2006-08-16
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, compared with piezoelectric ceramics, the dielectric constant of polyurethane elastomers is lower, and the electromechanical activity is not as good as piezoelectric ceramic materials, which limits its application.

Method used

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  • Process for synthesizing nano barium titanate/polyurethane elastic composite
  • Process for synthesizing nano barium titanate/polyurethane elastic composite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Add nanoscale barium titanate powder to N, N-dimethylacetamide solution containing coupling agent (coupling dose is 1.6% of the weight of barium titanate powder) to form 10% (wt / wt) After stirring for 4 hours at room temperature, take out 1ml and add it to 6.2g poly(hexanediol-neopentyl glycol) adipate polyol (hydroxyl value 74), stir vigorously, and heat to 160°C for pumping Vacuum to remove the solvent in the system. Keep the vacuum and lower the temperature to 75°C, add 0.2728g of 1,1,1-trimethylolpropane and 0.046ml of 1,4-butanediol (80% cross-linking agent ratio), and continue to fully stir. Then add 1.17ml of toluene diisocyanate, stir all the materials quickly and fully, pour them into the mold, cure in an oven at 110°C for 10 hours, and slowly cool down to room temperature to obtain nano barium titanate / polyurethane elastomer composite material. from figure 1 It can be seen that the relationship between the dielectric constant and the frequency of the obtaine...

Embodiment 2

[0021] The polyhexamethylene adipate neopentyl glycol ester polyol in Example 1 was changed to polybutylene adipate neopentyl glycol ester polyol with the same relative molecular weight, and other conditions remained unchanged. The obtained material has a maximum dielectric constant of 8.1 and a maximum strain of -0.021 (5000V applied voltage).

Embodiment 3

[0023] The addition amount of the nano-barium titanate powder suspension in Example 1 was further increased to 1.5 ml, and the other conditions remained unchanged. The maximum dielectric constant is 8.6 and the maximum strain is -0.0152 (5000V applied voltage).

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Abstract

A process for synthesizing the electrostrictive nano-barium carbonate / polyurethane elastomer compound includes such steps as proportionally mixing nano-barium carbonate, solvent and coupling agent, adding it to polyester polyol, adding isocyanate and cross-linking agent, polymerizing and high-temp solidifying.

Description

technical field [0001] The invention relates to a synthesis method of nanometer barium titanate / polyurethane elastomer composite material with electrostrictive performance. Background technique [0002] Polyurethane (referred to as Polyurethane Polyurethane) is named for its urethane group -NH-COO- in the main chain of the macromolecule. It is a high polymer with unique properties and multiple uses. As a type of polyurethane resin, polyurethane elastomer is a high molecular polymer between ordinary rubber and hard plastic. It not only has the high strength of plastic, but also has the elasticity and toughness of rubber. It still maintains elasticity under high hardness, and has high mechanical strength under low hardness. Chemical corrosion, radiation resistance, good adhesion with other materials, high elasticity, strong vibration absorption ability and good biocompatibility and other excellent properties. [0003] In 1994, Newman et al. (J....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L75/06C08G18/42C08K3/24
Inventor 林保平丛羽奇李建清
Owner SOUTHEAST UNIV
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