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Composite piezoelectric film and preparation method thereof

A technology of piezoelectric thin film and composite film, applied in the manufacture/assembly of piezoelectric/electrostrictive devices, piezoelectric/electrostrictive/magnetostrictive devices, material selection for piezoelectric devices or electrostrictive devices It can solve the problems that the piezoelectric performance cannot fully meet the market performance requirements, and achieve the effects of high piezoelectric constant, high sensitivity and strong environmental adaptability.

Pending Publication Date: 2020-02-21
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In general, most of the existing technologies are based on the research of pure PVDF piezoelectric materials or composite piezoelectric films prepared with other conductive substances, and their piezoelectric properties cannot fully meet the market performance requirements and need to be further improved.

Method used

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  • Composite piezoelectric film and preparation method thereof
  • Composite piezoelectric film and preparation method thereof
  • Composite piezoelectric film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A preparation method of nano-cellulose / PVDF composite piezoelectric film includes the following steps: first add 2 parts of PVDF powder and 50 parts of N,N-dimethylformamide into a reactor, start a stirrer to adjust the speed to 300r / min, stirring for 30min, after PVDF is dissolved, add 2 parts of nano cellulose and 0.05 part of Mxene, adjust the stirring speed to 1000r / min, stir for 5min, use vacuum filtration (0.1MPa, 1h), hot press drying (100℃ , 5min) method to prepare nanocellulose / PVDF composite membrane; then put the prepared film into a polarizer, polarization voltage 8000V, polarization temperature 60℃, polarization time 20min, to obtain nanocellulose / PVDF composite Piezoelectric film.

Embodiment 2

[0036] A preparation method of nano-cellulose / PVDF composite piezoelectric film includes the following steps: first add 2 parts of PVDF powder and 50 parts of N-methylpyrrolidone into a reactor, start a stirrer to adjust the speed to 300r / min, and stir 30min, after PVDF is dissolved, add 3 parts of nanocellulose, 0.05 part of Mxene, adjust the stirring speed to 1000r / min, stir for 5min, use vacuum filtration (0.1MPa, 1h), hot press drying (100℃, 5min) Preparation of nano-cellulose / PVDF composite membrane; then put the prepared film into a polarizer, polarization voltage 10000V, polarization temperature 60°C, polarization time 30min, to obtain nano-cellulose / PVDF composite piezoelectric film.

Embodiment 3

[0038] A preparation method of nano-cellulose / PVDF composite piezoelectric film includes the following steps: first add 2 parts of PVDF powder and 50 parts of dimethyl sulfoxide into a reactor, start a stirrer to adjust the speed to 300r / min, and stir 30min, after PVDF is dissolved, add 4 parts of nanocellulose, 0.05 part of Mxene, adjust the stirring speed to 1000r / min, stir for 5min, use vacuum filtration (0.1MPa, 1h), hot press drying (100℃, 5min) Preparation of nano-cellulose / PVDF composite membrane; then put the prepared film into a polarizer, polarization voltage of 12000V, polarization temperature of 60°C, and polarization time of 60 minutes to obtain nano-cellulose / PVDF composite piezoelectric film.

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Abstract

The invention discloses a composite piezoelectric film and a preparation method thereof. The pure natural plant nano cellulose fiber, Mxene and polyvinylidene fluoride are used as raw materials, and anano cellulose / PVDF composite film with stronger piezoelectric property is prepared by the processes of mechanical mixing, drying film formation, high-voltage polarization and the like. The production cost is low, and the process is simple; the product is good in flexibility, high in sensitivity, suitable for batch production and continuous production, high in piezoelectric constant and high in environmental adaptability, and has great application potential in the fields of medical care, sports and leisure, human-computer interaction, transportation and the like.

Description

Technical field [0001] The invention belongs to the technical field of composite material preparation, and specifically relates to a composite piezoelectric film and a preparation method thereof. Background technique [0002] Piezoelectric material is a functional material that can convert between mechanical energy and electrical energy. Since the Curie brothers discovered the piezoelectric effect of quartz crystals in the 1880s, this material has attracted more and more attention. With the deepening of research, a large number of piezoelectric materials have emerged, such as piezoelectric film materials, piezoelectric ceramic materials, and piezoelectric composite materials. These materials have a very wide range of uses and play an important role in electrical, magnetic, acoustic, optical, thermal, moisture, gas, and force conversion devices. [0003] Polyvinylidene fluoride (PVDF) is a new type of polymer multifunctional material with unique pyroelectric and piezoelectric effe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L41/18H01L41/257H01L41/37H10N30/85H10N30/045H10N30/092
CPCH10N30/852H10N30/045H10N30/092
Inventor 李国栋刘温霞孔凡功孟霞黄浩存韩馨怡赵汝和
Owner QILU UNIV OF TECH
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