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Preparation method of composite nanometer piezoelectric generator

A generator and piezoelectric technology, applied in the manufacture/assembly of piezoelectric/electrostrictive devices, generator/motor, material selection for piezoelectric devices or electrostrictive devices, etc., can solve the output of nano-film Not high, polydimethylsiloxane has no piezoelectric performance and other problems, and achieves the effects of low price, uniform external force, and high output short-circuit voltage

Inactive Publication Date: 2014-11-19
UNIV OF SCI & TECH BEIJING
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Problems solved by technology

[0009] The purpose of the present invention is to solve the problem that the organic matrix used in traditional nanocomposite generators is polydimethylsiloxane (PDMS), which has no piezoelectric properties. At the same time, due to its viscosity, when nanomaterials are mixed with PDMS, nanomaterials It cannot be well dispersed in it, which will cause the agglomeration of nanomaterials, so that the output of the prepared nanofilm is not high. A composite nanopiezoelectric generator based on organic piezoelectric materials and piezoelectric particles is proposed. Preparation

Method used

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Examples

Experimental program
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Effect test

Embodiment approach 1

[0020] Embodiment 1: Preparation of PVDF / barium titanate nanoparticle composite nanofilm

[0021] (1) Preparation of PVDF organic solvent: Weigh 3g of PVDF particles with a balance and put it into a clean round-bottomed flask, weigh 30ml of nitrogen methylpyrrolidone (NMP) organic solvent with a graduated cylinder and pour it into the round-bottomed flask, and put it in the flask. rotor, place the flask in a magnetic stirring water bath, adjust the temperature to 45°C, and rotate the speed to 3000r / min. Stirring was continued for 12 hours to obtain a fully dissolved PVDF organic solvent. preparation process such as Picture 1-1 to 1-3.

[0022](2) Substrate cleaning and preparation of PVDF / barium titanate nanoparticle mixed solution: After ultrasonically cleaning the glass slide substrate with acetone, ethanol, isopropanol, and deionized water, dry it with nitrogen gas; measure 3ml of the PVDF organic solution obtained above Put it into a clean beaker, weigh 0.7g of bariu...

Embodiment approach 2

[0025] Embodiment 2: Preparation of PVDF / lithium niobate nanoparticle composite nanofilm

[0026] (1) Prepare PVDF organic solvent as in Example 1.

[0027] (2) Substrate cleaning and preparation of PVDF / lithium niobate nanoparticle mixed solution: substrate cleaning, measure 3ml of the PVDF organic solution obtained above into a cleaned beaker, weigh 0.3g of lithium niobate nanoparticles into the beaker with a balance In the process, seal the mouth of the beaker with a parafilm, put the beaker in an ultrasonic machine, and keep stirring for 10-30min, and stir evenly.

[0028] (3) Obtain the composite nano film: put the washed glass slide on a very flat petri dish, drop the obtained mixed solution on the glass slide with a dropper, and spread the solution on the glass slide. Put the petri dish into a vacuum drying oven, evacuate, adjust the temperature to 55° C., and vacuum dry for 1 hour. Take out the petri dish, and carefully peel off the film on the glass slide with twe...

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Abstract

A composite nanometer piezoelectric generator based on an organic piezoelectric material and piezoelectric ceramic particles belongs to the field of nanometer generator preparation. The invention aims to provide and build up a nanometer generator film preparation method with the characteristics of quick preparation, uniform particles, low cost and high output and is characterized in that nanometer (or submicron) piezoelectric particles with high voltage coefficients are good in piezoelectric performance, the organic piezoelectric material as the base body is good in piezoelectric performance and the piezoelectric particles can also be uniformly dispersed in the organic piezoelectric material due to the good viscosity of the solution of the organic piezoelectric material, meanwhile, the piezoelectric particles are also good in mechanical performance; through the combination of the piezoelectric performance and the mechanical performance of the nanometer piezoelectric particles, flexible piezoelectric films with uniformly distributed particles can be prepared and the high output nanometer piezoelectric generator can be made through the high voltage polarization of the films. According to the invention, the characteristics of simple structure, low cost, quick preparation, good flexibility and high output and can be realized, and the composite nanometer piezoelectric generator can be applied to nanometer electricity generation field, force transducers and electric transducers and to drive LED and the like, as a result, the nanometer generator is excellent in application value.

Description

technical field [0001] The invention belongs to the field of preparation of composite nano power generation, relates to a method for preparing a composite nano piezoelectric generator based on organic piezoelectric materials and piezoelectric ceramic particles, and belongs to the field of preparation of nano generators. Background technique [0002] In recent years, nanogenerators have been widely used in the nanometer field. Nanogenerators convert mechanical energy into electrical energy in the nanoscale range through the piezoelectric effect, that is, the effect of charge polarization caused by mechanical deformation in materials, and realize electromechanical coupling. and the important process of sensing. And it can integrate nanodevices to realize nanosystems in the true sense. It can collect mechanical energy, vibration energy and fluid energy, and convert these energies into electrical energy for nanodevices. The electrical energy generated by nanogenerators is enough...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L41/37H01L41/257H01L41/18H01L41/113H02N2/18H10N30/092H10N30/045H10N30/30H10N30/85
Inventor 张跃赵颖利廖庆亮张光杰张铮梁齐杰
Owner UNIV OF SCI & TECH BEIJING
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