Preparation methods of nanometer piezoelectric film and nanometer composite piezoelectric generator

A piezoelectric film and composite piezoelectric technology, applied in the manufacture/assembly of piezoelectric/electrostrictive devices, material selection for piezoelectric devices or electrostrictive devices, device material selection, etc., can solve nano power generation Reduce mechanical performance and other problems, and achieve the effect of low cost, uniform distribution and stress, and good application prospects

Active Publication Date: 2014-12-10
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, adding too much conductive carbon nanotubes will have a shielding effect on the piezoelectric potential, thereby weakening the performance of the nanogenerator.

Method used

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  • Preparation methods of nanometer piezoelectric film and nanometer composite piezoelectric generator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Cut the purified bacterial cellulose membrane into small pieces, soak in deionized water, and disperse with a high-speed disperser to obtain a semi-gelled bacterial cellulose slurry. Measure its density as 0.9675g cm 3 .

[0024] (2) Weigh 0.3g of barium titanate nanoparticles (about 100nm in diameter) and disperse them into 20 ml of deionized water, and ultrasonically oscillate for 20 min to obtain a uniform barium titanate suspension.

[0025] (3) Measure 40 ml of the bacterial cellulose slurry prepared in step (1), mix it with the barium titanate suspension in step (2), stir thoroughly and ultrasonically oscillate for 30 min to obtain a uniform mixed slurry .

[0026] (4) Pour the mixed slurry in step (3) into the suction filtration device for suction filtration. After the liquid is filtered off, a layer of wet film will be formed on the filter membrane.

[0027] (5) Sandwich the wet film between two polytetrafluoroethylene plates, place it in a vacuum box and...

Embodiment 2

[0032] (1) Cut the purified bacterial cellulose membrane into small pieces, soak in deionized water, and disperse with a high-speed disperser to obtain a semi-gelled bacterial cellulose slurry. Measure its density as 0.9675g cm 3 .

[0033] (2) Weigh 0.2 g of sodium niobate nanoparticles (about 1 μm in diameter) and disperse them into 20 ml of deionized water, and ultrasonically oscillate for 20 min to obtain a uniform sodium niobate suspension.

[0034] (3) Measure 40 ml of the bacterial cellulose slurry prepared in step (1), mix it with the sodium niobate suspension in step (2), stir thoroughly and ultrasonically oscillate for 30 min to obtain a uniform mixed slurry .

[0035] (4) Pour the mixed slurry in step (3) into the suction filtration device for suction filtration. After the liquid is filtered off, a layer of wet film will be formed on the filter membrane.

[0036] (5) Sandwich the wet film between two polytetrafluoroethylene plates, place it in a vacuum box and ap...

Embodiment 3

[0041] (1) Cut the purified bacterial cellulose membrane into small pieces, soak in deionized water, and disperse with a high-speed disperser to obtain a semi-gelled bacterial cellulose slurry. Measure its density as 0.9675 g cm 3 .

[0042] (2) Weigh 0.1 g of barium titanate nanoparticles (about 100 nm in diameter) and disperse them into 20 ml of deionized water, and ultrasonically oscillate for 20 min to obtain a uniform barium titanate suspension.

[0043] (3) Measure 20 ml of the bacterial cellulose slurry prepared in step (1), mix it with the barium titanate suspension in step (2), stir thoroughly and ultrasonically oscillate for 30 min to obtain a uniform mixed slurry .

[0044] (4) Pour the mixed slurry in step (3) into the suction filtration device for suction filtration. After the liquid is filtered off, a layer of wet film will be formed on the filter membrane.

[0045] (5) Sandwich the wet film between two polytetrafluoroethylene plates, place it in a vacuum box ...

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Abstract

The invention discloses preparation methods of a nanometer piezoelectric film and a nanometer composite piezoelectric generator. The methods are characterized in that biocompatible bacterial cellulose is taken as a substrate, and nanometer (or submicron) piezoelectric particles having high piezoelectric coefficients are taken as a filling material, the piezoelectric film is obtained by compounding the bacterial cellulose and the piezoelectric particles, and the piezoelectric film is used for constructing the flexible nanometer composite piezoelectric generator. Through the unique spatial three-dimensional network structure of the bacterial cellulose, the piezoelectric particles are naturally and uniformly distributed in the bacterial cellulose, and the internal stress of the film is uniformly, thereby greatly improving the output performance of the nanometer composite piezoelectric generator. The nanometer composite piezoelectric generator is biocompatible, and can be implanted into a living body to collect energy. Moreover, a preparation process is simple, the cost is low, and the nanometer piezoelectric film and the nanometer composite piezoelectric generator have very good application prospects.

Description

technical field [0001] The invention relates to a preparation method of a nano-piezoelectric thin film and a nano-generator compounded by bacterial cellulose and piezoelectric particles, and has wide application prospects in the fields of medical materials, electronic materials, and the like. [0002] Background technique [0003] Energy issues have become increasingly prominent in human development. Environmental pollution caused by traditional energy sources and their limited reserves force people to seek alternative new energy sources. However, the energy contained in the environment is ubiquitous, such as mechanical energy such as vibration and friction, and waste heat energy. If these energies are collected and utilized through a certain conversion mechanism, the total amount will be very considerable. In recent years, the popularity of portable electronic products has put forward higher requirements for the power supply driving these electronic devices. The tradition...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L41/37H01L41/18
Inventor 张跃张光杰廖庆亮赵颖利张铮梁齐杰
Owner UNIV OF SCI & TECH BEIJING
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