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A preparation method of 3D printing polyvinylidene fluoride piezoelectric film

A polyvinylidene fluoride piezoelectric and 3D printing technology, applied in the manufacture/assembly of piezoelectric/electrostrictive devices, 3D object support structures, piezoelectric/electrostrictive/magnetostrictive devices, etc., can solve 3D The preparation method of printing flexible piezoelectric films has not been reported yet, and the printing style is flexible, raw materials are saved, and automation is facilitated.

Active Publication Date: 2022-01-11
上海凸申科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the consumables used in 3D printing are basically hard consumables, and few flexible materials are involved; moreover, the preparation method of flexible piezoelectric film for 3D printing has not been reported yet.

Method used

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  • A preparation method of 3D printing polyvinylidene fluoride piezoelectric film
  • A preparation method of 3D printing polyvinylidene fluoride piezoelectric film
  • A preparation method of 3D printing polyvinylidene fluoride piezoelectric film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Use devices such as figure 1 As shown, a PVDF piezoelectric film 3D model with a square section of 20mm × 20mm and a thickness of 40μm was established with Solidworks software, and the established 3D model was sliced ​​with Cura software. The slice parameters were: layer thickness 0.01mm, moving speed 30mm / s , The movement track adopts non-woven textile type. Weigh 1.2g of PVDF powder, 7.9g of N-methylpyrrolidone (NMP) and 0.9g of acetone to mix, ultrasonically oscillate for 2 hours until it is clear and transparent, and let it stand for 15 minutes to exhaust the air bubbles, and prepare a printing ink with a mass percentage of PVDF of 12wt%. Draw 1-2mL of printing ink with a needle tube, and assemble a 24-gauge needle (inner diameter 0.3mm). Connect the positive pole of the high-voltage DC power supply to the needle, and connect the negative pole of the high-voltage DC power supply to the copper plate at the bottom of the bottom plate. After fixing the needle tube an...

Embodiment 2

[0030] Use devices such as figure 1 As shown, a PVDF piezoelectric film 3D model with a square section of 20 mm × 20 mm and a thickness of 80 μm was established with Solidworks software, and the established 3D model was sliced ​​with Cura software. The slice parameters were: layer thickness 0.01 mm, moving speed 30 mm / s , the movement trajectory is in the form of a back shape. Weigh 1.5g PVDF powder, 7.6g N-methylpyrrolidone (NMP) and 0.9g acetone, mix and ultrasonically shake for 2h until clear and transparent. Stand still for 15 minutes to exhaust air bubbles to prepare printing ink with PVDF mass percentage content of 15wt%. Draw 1-2mL of printing ink with a needle tube, and assemble a 24-gauge needle (inner diameter 0.3mm). Adjust the voltage of the high-voltage DC power supply to 3kV, start the 3D printer to prepare the piezoelectric film until the end of the program, and let it dry naturally.

[0031] The prepared PVDF piezoelectric film has fine structure, good flexi...

Embodiment 3

[0033] Use devices such as figure 1As shown, a PVDF piezoelectric film 3D model with a square section of 20 mm × 20 mm and a thickness of 80 μm was established with Solidworks software, and the established 3D model was sliced ​​with Cura software. The slice parameters were: layer thickness 0.01 mm, moving speed 30 mm / s , the movement trajectory is in the form of a back shape. Weigh 1.8g PVDF powder, 7.3g N-methylpyrrolidone (NMP) and 0.9g acetone, mix and ultrasonically shake for 2h until clear and transparent. Stand still for 15 minutes to exhaust air bubbles to prepare printing ink with PVDF mass percentage content of 18wt%. Draw 1-2mL of printing ink with a needle tube, and assemble a 24-gauge needle (inner diameter 0.3mm). Connect the positive pole of the high-voltage DC power supply to the needle, and connect the negative pole of the high-voltage DC power supply to the copper plate at the bottom of the bottom plate. After fixing the needle tube and adjusting the distan...

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Abstract

The invention belongs to the field of piezoelectric film material preparation, and specifically relates to a method for preparing a 3D printed polyvinylidene fluoride piezoelectric film; the specific steps are: first create a 3D model of the piezoelectric film and perform slice processing; use 3D modeling software to build the model , use Cura software to slice the established 3D model; then weigh multi-walled carbon nanotubes and graphene in proportion, mix multi-walled carbon nanotubes and graphene with N-methylpyrrolidone, and ultrasonically form a precursor solution , add polyvinylidene fluoride powder and acetone, and ultrasonically obtain 3D printing ink; finally, set the printing process and process, start the 3D printer to print piezoelectric film on the bottom plate, and obtain polyvinylidene fluoride piezoelectric film; the present invention obtains polyvinylidene fluoride piezoelectric film. Vinylidene fluoride piezoelectric film has excellent flexibility, high β-phase content, and excellent piezoelectric performance. It has broad application prospects in complex environments such as damage detection, structural vibration, medical equipment, and artificial intelligence.

Description

technical field [0001] The invention belongs to the field of piezoelectric film material preparation, and in particular relates to a method for preparing a 3D printed polyvinylidene fluoride piezoelectric film. Background technique [0002] Traditional piezoelectric materials represented by silicon-based and ceramics are relatively brittle and cannot withstand large deformations, so they are difficult to apply to complex curved surfaces as sensor devices. The excellent piezoelectric performance, high flexibility, high sensitivity and low response charge of polyvinylidene fluoride (PVDF) make it a sensor in complex environments such as damage detection, structural vibration, medical equipment and artificial intelligence. Sensitive materials have unparalleled advantages. So far, PVDF has been reported to have 5 crystal forms, α, β, γ, δ and ε, and their formation conditions are different, and they can interact with each other under certain conditions (heat, electric field, me...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L41/45H01L41/257B29C64/165B29C64/209B29C64/264B33Y10/00B33Y30/00H10N30/098H10N30/045
CPCB29C64/165B29C64/209B29C64/264B33Y10/00B33Y30/00H10N30/045H10N30/098
Inventor 陈彩凤蔡飞翔王安东廖林晨祝园钱继龙
Owner 上海凸申科技有限公司