Double-layer structure flexible piezoelectric film with high output, preparation and application method thereof

A double-layer structure, flexible piezoelectric technology, applied to piezoelectric/electrostrictive/magnetostrictive devices, material selection for piezoelectric devices or electrostrictive devices, circuits, etc., can solve the problem of decreased flexibility, The problems of high modulus of inorganic nanofillers and increased modulus of composite materials can achieve the effect of maintaining flexibility, increasing dielectric constant, and enhancing piezoelectric output

Active Publication Date: 2018-09-14
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The second is that the modulus of the inorganic nanofiller itself is high, and the mo

Method used

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  • Double-layer structure flexible piezoelectric film with high output, preparation and application method thereof
  • Double-layer structure flexible piezoelectric film with high output, preparation and application method thereof
  • Double-layer structure flexible piezoelectric film with high output, preparation and application method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0028] Example 1

[0029] Weigh 0.5618g of the surface-modified BT nanoparticles in a beaker, add 7.5mL of nitrosidine dimethylformamide (DMF), ultrasonically disperse for 2h to form a uniform suspension, and then add 1.5g of PVDF powder to it. Magnetic stirring at 30°C for 12h to make it completely dissolved. Spin coating-heat treatment process as attached figure 1 Shown: Put the mixed solution in a vacuum drying box to pump bubbles, turn on the homogenizer, put on a glass slide that has been washed and ultrasonically treated in ethanol, and then use a pipette to suck up 2 mL of the mixed solution, drop it onto the glass slide, and perform ordering. Layer film spin coating. Spin coating at 500 rpm for 10 s and then at 1000 rpm for 15 s. The slow speed is for the solution to spread out slowly on the glass slide, and the fast speed is to ensure the film thickness is uniform. Put the single-layer film on the glue baking table, bake at 150°C for 2h (guarantee solvent drying), redu...

Example Embodiment

[0030] Example 2

[0031] Weigh 0.8923g of surface-modified BT nanoparticles into a beaker, add 7.5mL of DMF, ultrasonically disperse for 2h to form a uniform suspension, then add 1.5g of PVDF powder to it, magnetically stir at 30℃ for 12h to make it complete Dissolve. Put the mixed solution in a vacuum drying box to evacuate bubbles, turn on the homogenizer, put on a glass slide that has been washed and sonicated in ethanol, and then use a pipette to suck up 2 mL of the mixed solution, drop it onto the glass slide, and perform single-layer film spinning. Painted. Spin coating at 600rpm for 10s and then 1200rpm for 10s. Put the monolayer film on the glue bake table, bake at 160℃ for 2h, reduce the temperature to 40℃, and apply the second layer of the monolayer film on the glass sheet Pure PVDF spin coating, the spin coating conditions are the same, and finally the solvent is thoroughly dried at 70°C for 10 hours. Remove the double-layer film from the glass substrate to obtain ...

Example Embodiment

[0032] Example 3

[0033] Weigh 1.2640g of the surface-modified BT nanoparticles into a beaker, add 7.5mL of nitrosidine dimethylformamide (DMF), ultrasonically disperse for 2h to form a uniform suspension, and then add 1.5g of PVDF powder to it. Magnetic stirring at 30°C for 12h to make it completely dissolved. Put the mixed solution in a vacuum drying box to evacuate bubbles, turn on the homogenizer, put on a glass slide that has been washed and sonicated in ethanol, and then use a pipette to suck up 2 mL of the mixed solution, drop it onto the glass slide, and perform single-layer film spinning. Painted. Spin coating at 600rpm for 10s and then 1500rpm for 10s for spin coating. Put the monolayer film on the glue bake table, bake at 150℃ for 2h, reduce the temperature to 40℃, and apply the second layer of the monolayer film on the glass sheet Pure PVDF spin coating, the spin coating conditions are the same, and finally the solvent is thoroughly dried at 70°C for 10 hours. Rem...

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Abstract

Belonging to the field of electronic composite materials and nano-functional materials, the invention provides a double-layer structure flexible piezoelectric film with high output, a preparation andapplication method thereof. A layer-by-layer solution spin coating-heat treatment process is adopted, an inorganic piezoelectric material is used as the filler to enhance the piezoelectric output of the composite film, and the double-layer structure is utilized to acquire high output and good mechanical properties at the same time. The inorganic filler is nanoparticles or nanofiber of barium titanate, barium strontium titanate, lead zirconate titanate and other piezoelectric ceramics, or nanoparticles or nanofiber of magnesium oxide, zinc oxide and other metal oxides, or multiwalled carbon nanotube. The polymer matrix can be polyvinylidene fluoride, polyvinylidene fluoride-trifluoroethylene, polyvinylidene fluoride-trifluoroethylene-hexafluoropropylene and other materials. By adjusting thefiller content and the filler distribution in the double layers, the filler efficiency can be improved. The composite material has the characteristics of good flexibility, high piezoelectric output,high sensitivity and light weight, and can be used as a power supply of wearable equipment, as a flexible sensor to detect human activities and the like.

Description

technical field [0001] The invention belongs to the technical field of electronic composite materials and nano-functional materials, and relates to a double-layer structure polymer-based composite film using nano-piezoelectric ceramics, metal oxides, multi-wall carbon nanotubes and other inorganic materials as fillers by using a solution spin-coating process and its preparation method. The composite material has the characteristics of good mechanical properties, high piezoelectric output, high sensitivity and light weight. Background technique [0002] Piezoelectric materials refer to crystalline materials that generate voltage at both ends when subjected to an external force, and can realize mutual conversion between mechanical energy and electrical energy. Utilizing the characteristics of piezoelectric materials, it can be used to make various sensor elements and micro-nano energy devices. [0003] Barium titanate (BT) and lead zirconate titanate (PZT) are typical piezoe...

Claims

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Application Information

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IPC IPC(8): C08L27/16C08K9/00C08K3/24C08J5/18H01L41/113H01L41/18H01L41/187H01L41/193H01L41/317
CPCC08J5/18C08J2327/16C08K3/24C08K9/00H10N30/308H10N30/8536H10N30/302H10N30/8554H10N30/857H10N30/077
Inventor 胡澎浩牛津闫丽丽赵朝贤
Owner UNIV OF SCI & TECH BEIJING
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