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Preparation method of synergistically doped modified polyvinylidene fluoride piezoelectric nano-generator

A polyvinylidene fluoride piezoelectric and nanogenerator technology, applied in the direction of generator/motor, piezoelectric effect/electrostrictive or magnetostrictive motor, electrical components, etc., can solve the piezoelectric output of PVDF nanofiber film Problems such as low performance, to achieve the effect of improving output performance

Pending Publication Date: 2021-03-09
XI'AN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for preparing a synergistically doped modified polyvinylidene fluoride piezoelectric nanogenerator, which solves the problem of low piezoelectric output performance of PVDF nanofiber membranes in the prior art

Method used

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  • Preparation method of synergistically doped modified polyvinylidene fluoride piezoelectric nano-generator
  • Preparation method of synergistically doped modified polyvinylidene fluoride piezoelectric nano-generator

Examples

Experimental program
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Effect test

Embodiment 1

[0048]Add PVDF with a mass fraction of 12wt% into a solvent with a DMAc:acetone ratio of 70:30, and stir until the solution is transparent. Then add 1wt% of vitamin B2, 6wt% of dopamine and 0.1wt% of ZnO, and keep stirring for 120 minutes to fully dissolve vitamin B2 into the PVDF solution to obtain a spinning solution. The above-mentioned spinning solution is subjected to electrospinning, and the parameters of the electrospinning process are: the spinning temperature is 20° C., the relative humidity is 40%, the perfusion speed is 0.5 mL / h, the spinning distance is 10 cm, and the spinning voltage is 15 kV. Silk time is 2h. The prepared nanofiber membrane was dried for 50 minutes to make the solvent evaporate as much as possible. Then add PDMS and curing agent in a petri dish of appropriate size to encapsulate the nanofibrous membrane in PDMS. The prepared nanofiber packaging film was cut into strips with a width of 0.5 mm perpendicular to the nanofiber arrangement direction,...

Embodiment 2

[0050] Add PVDF with a mass fraction of 14wt% into the solution with a DMAc:acetone ratio of 60:40, and stir until the solution is transparent. Then add 5wt% of vitamin B2, 6wt% of dopamine and 1wt% of CNTs, and keep stirring for 120min to fully dissolve vitamin B2 into the PVDF solution to obtain a spinning solution. The above-mentioned spinning liquid is subjected to electrospinning, and the parameters of the electrospinning process are: the spinning temperature is 25°C, the relative humidity is 45%, the perfusion speed is 1.0mL / h, the spinning distance is 15cm, the spinning voltage is 20kV, and the spinning Silk time is 3h. The prepared nanofiber membrane was dried for 40 minutes to make the solvent evaporate as much as possible. Then add PDMS and curing agent in a petri dish of appropriate size to encapsulate the nanofibrous membrane in PDMS. The prepared nanofiber packaging film was cut into strips with a width of 0.6 mm perpendicular to the nanofiber arrangement direct...

Embodiment 3

[0052] Add PVDF with a mass fraction of 16wt% into the solution with a ratio of DMAc:acetone of 50:50, and stir until the solution is transparent. Then add 9wt% sodium niobate particles, 6wt% dopamine and 5wt% BaTiO 3 , and continued to stir for 300 minutes to fully dissolve the sodium niobate particles into the PVDF solution to obtain a spinning solution. The above-mentioned spinning liquid is subjected to electrospinning, and the parameters of the electrospinning process are: the spinning temperature is 30°C, the relative humidity is 50%, the perfusion speed is 1.5mL / h, the spinning distance is 20cm, and the spinning voltage is 25kV. Silk time is 4h. The prepared nanofiber membrane was dried for 30 minutes to make the solvent evaporate as much as possible. Then add PDMS and curing agent in a petri dish of appropriate size to encapsulate the nanofibrous membrane in PDMS. The prepared nanofiber packaging film was cut into strips with a width of 0.7 mm perpendicular to the n...

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Abstract

The invention discloses a preparation method of a synergistically doped modified polyvinylidene fluoride (PVDF) piezoelectric nano-generator, and the method specifically comprises the following steps:dissolving PVDF in a mixed solvent of dimethylacetamide (DMAc) and acetone, and adding a beta nucleating agent, a chemical modifier and inorganic nanoparticles with piezoelectric properties accordingto a certain proportion, and preparing a uniform and stable spinning solution with a certain concentration; performing electrostatic spinning on the spinning solution through an electrostatic spinning machine, wherein a receiving device is a high-speed roller, and preparing a directional nanofiber membrane; adding a curing agent into PDMS (Polydimethylsiloxane) for packaging the oriented nanofiber membrane; vertically cutting the cured nanofiber membrane along the longitudinal direction of the nanofiber, and arranging the nanofiber membrane in a manner of being vertical to the horizontal position to form an elastic and vertically-arranged nanofiber piezoelectric film; attaching conductive plates to the upper and lower parts of the prepared piezoelectric film, and packaging the whole piezoelectric film with PDMS to prepare the nano-generator.

Description

technical field [0001] The invention belongs to the technical field of electrospinning, and relates to a method for preparing a synergistically doped modified polyvinylidene fluoride piezoelectric nanogenerator. Background technique [0002] As an emerging component material in modern electronics, nanomaterials have a series of unique shapes and properties, which provide a broad window for improving the performance of various energy devices. Using nanomaterials and nanotechnology to harvest energy from the environment, As a sustainable, self-sufficient energy source, it constitutes the emerging field of nanoenergy, which can be used to provide continuous energy for electronic devices. [0003] Commonly used polymers with strong piezoelectric properties mainly include polyvinylidene fluoride (PVDF) and its copolymers. Among them, PVDF is currently the most widely used piezoelectric polymer because of its good processability, acid and alkali corrosion resistance, and high mec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02N2/18D04H1/4318D04H1/728D01F6/48D01F1/10
CPCD01F1/10D01F6/48D04H1/4318D04H1/728H02N2/18H02N2/22
Inventor 刘呈坤张梦迪张庆申宇彤王浩毛雪魏亮冯燕
Owner XI'AN POLYTECHNIC UNIVERSITY
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