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A multifunctional flexible piezoelectric composite film with an ordered structure and its preparation method

A technology for flexible piezoelectric, ordered structures with applications in the fabrication/assembly of piezoelectric/electrostrictive devices, piezoelectric/electrostrictive/magnetostrictive devices, materials for piezoelectric or electrostrictive devices Choosing the same direction can solve the problems of complex preparation method, high cost and poor repeatability, and achieve the effect of simple preparation method, short response time and stable structure

Active Publication Date: 2021-09-17
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although these works have a good effect on improving the sensitivity of functionalized thin films, the preparation methods of nanowires, nanorods and microarrays are relatively complicated, poorly reproducible and costly

Method used

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  • A multifunctional flexible piezoelectric composite film with an ordered structure and its preparation method
  • A multifunctional flexible piezoelectric composite film with an ordered structure and its preparation method
  • A multifunctional flexible piezoelectric composite film with an ordered structure and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] First, 0.5g of polyvinylidene fluoride copolymer P (VDF-TrFE) powder was dissolved in 100mL of N,N-dimethylformamide (DMF) solvent for later use, and then 0.5g of BaTiO 3 Disperse the single crystal microchips into 50mL DMF (N,N-Dimethylformamide N,N-dimethylformamide) solvent, form a suspension of piezoelectric single crystal microchips by ultrasonication and stirring, and then insert the clean glass slide into the In the above P(VDF-TrFE) solution, let it stand for 3 minutes, dry it, and then use a dropper to draw 10mL BaTiO 3 The single crystal microchip suspension is evenly and slowly dripped onto the tilted above-mentioned glass piece, and the glass piece is dried. The process of inserting the glass sheet into the P(VDF-TrFE) solution and then dripping the suspension of single crystal microchips for drying is repeated 150 times in this way to form a multifunctional flexible piezoelectric composite film with an ordered structure, such as figure 1 , 2 shown.

[00...

Embodiment 2

[0037] First, dissolve 0.5g of PVA (polyvinylalcohol polyvinyl alcohol) powder in 100mL of deionized water, set aside, then add 0.5g of BaTiO 3 Disperse the single crystal microchips into 50mL deionized water, and form a suspension of piezoelectric single crystal microchips through ultrasonication and stirring, then insert the clean glass slices into the above-mentioned PVA aqueous solution, let it stand for 3 minutes, dry it, and then use Pipette to draw 10mL BaTiO 3 The single crystal microchip suspension was evenly and slowly dropped onto the tilted above-mentioned glass piece, and dried. The process of inserting the glass sheet into the PVA solution and then dripping the suspension of the single crystal microchip to dry it is repeated 150 times in this way to form a multifunctional flexible piezoelectric composite film with an ordered structure.

[0038]Through magnetron sputtering, gold electrodes are evenly plated on the upper and lower surfaces of the composite film, a...

Embodiment 3

[0040] Firstly, 0.5g P(VDF-TrFE) powder was dissolved in 100mL DMF solvent for later use, then 0.5gPbTiO 3 Single crystal microchips were dispersed into 50mL DMF solvent, and PbTiO was formed by ultrasonication and stirring. 3 The suspension of single crystal microchip, and then insert the clean glass piece into the above P(VDF-TrFE) solution, let it stand for 3 minutes, dry it, and then use a dropper to draw 10mL of PbTiO 3 The single crystal microchip suspension was evenly and slowly dropped onto the tilted above-mentioned glass piece, and dried. The process of inserting the glass sheet into the P(VDF-TrFE) solution and then dripping the suspension of the single crystal microchip for drying was repeated 150 times in this way to form a multifunctional flexible piezoelectric composite film with an ordered structure.

[0041] Through magnetron sputtering, gold electrodes are evenly plated on the upper and lower surfaces of the electrical composite film, and wires are drawn out...

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Abstract

The invention discloses a multifunctional flexible piezoelectric composite film with an ordered structure and a preparation method thereof, and relates to the field of flexible piezoelectric materials. A flexible functionalized piezoelectric film with high sensitivity can be prepared, and the preparation method is simple in process. ,low cost. The invention includes: dissolving polymer powder in a solvent, dispersing piezoelectric single crystal microchips in the solvent, to obtain a polymer solution and a piezoelectric single crystal microchip dispersion respectively; inserting a glass sheet into the polymer solution and allowing it to stand still , and then dry the glass sheet; drop the piezoelectric single crystal microchip suspension evenly and slowly on the inclined glass sheet surface with a thin layer of polymer, and make the suspension flow over the polymer surface, and then add The glass sheet is dried; the cycle is performed until a multifunctional flexible piezoelectric composite film with a multi-layer ordered structure is formed on the surface of the glass sheet. The invention can be widely used in the fields of smart wearable devices, flexible robots, energy collection, biomedicine and the like.

Description

technical field [0001] The invention relates to the field of flexible piezoelectric materials, in particular to a multifunctional flexible piezoelectric composite film with an ordered structure and a preparation method thereof. Background technique [0002] In recent years, the fields of flexible wearable devices and artificial intelligence have developed rapidly, and the requirements for their core components—sensors are getting higher and higher, and this kind of flexible sensors is mainly composed of some functional films with special microstructures. The development of high-performance functional films is a prerequisite for the field of flexible sensors. The performance of functional film bodies is directly related to the intelligence and multi-function of carriers such as robots, medical equipment, human prostheses and wearable devices, and has been subject to multidisciplinary research. personnel are highly valued. As early as 1991, T.R.Jensen et al. developed a funct...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L41/37H01L41/18C23C14/35C23C14/14H10N30/092H10N30/85
CPCC23C14/35C23C14/14H10N30/852H10N30/092
Inventor 王一平李雄杰杨颖何亭睿孙胜盛云陈朋胡悫睿
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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