A flexible integrated piezoelectric sensing material and its preparation method

A piezoelectric sensing and flexible technology, applied in the field of flexible sensing materials and their preparation, can solve the problems of high density, complex processing, not suitable for wearable devices, etc., achieve low piezoelectric current, sensitive material response, and improve flexibility with light effect

Active Publication Date: 2021-09-21
DALIAN UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional piezoelectric materials and electrode materials are generally hard, high-density and complexly processed inorganic materials or metal materials, which do not meet the requirements of wearable devices

Method used

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  • A flexible integrated piezoelectric sensing material and its preparation method
  • A flexible integrated piezoelectric sensing material and its preparation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) 13% mass fraction of PVDF was dissolved in DMAc:acetone solvent with a volume ratio of 1:1, and magnetically stirred at 60° C. for 2 hours until completely dissolved to obtain a spinning solution.

[0031] (2) The spinning solution was electrospun at 15° C. and 40% humidity, with a propulsion speed of 35 μL / min, a spinning voltage of 8 kV, and a receiving distance of 12 cm to form a 20 μm thick PVDF electrospun film.

[0032] (3) Grind 300 mg of CNTs, add it to 1 L of water, stir for 3 h, and disperse ultrasonically for 1 h to obtain a uniform CNTs dispersion, add 10 mL of PEDOT:PSS dispersion with a mass fraction of 1%, stir for 1 h until completely mixed, and obtain CNTs / PEDOT:PSS composite dispersion.

[0033] (4) Using the electrospun membrane as a filter membrane, the CNTs / PEDOT:PSS composite dispersion was first vacuum-filtered to obtain a porous composite membrane deposited with 5 μm thick CNTs / PEDOT:PSS.

[0034] (5) Use the porous composite membrane deposi...

Embodiment 2

[0037] (1) 10% mass fraction of PVDF was dissolved in a DMF:acetone solvent with a volume ratio of 3:2, and magnetically stirred at 25° C. for 4 hours until completely dissolved to obtain a spinning solution.

[0038] (2) The spinning solution was electrospun at 25° C. and 60% humidity, with a propulsion speed of 47 μL / min, a spinning voltage of 15 kV, and a receiving distance of 12 cm to form a PVDF electrospun film with a thickness of 50 μm.

[0039] (3) Grind 500 mg of CNTs, add to 1 L of water, stir for 3 h, and ultrasonically disperse for 1 h to obtain a uniform CNTs dispersion.

[0040] (4) Using the electrospun membrane as a filter membrane, the CNTs dispersion was first subjected to vacuum filtration to obtain a porous composite membrane deposited with 10 μm thick CNTs.

[0041] (5) Use the porous composite membrane deposited with CNTs as a filter membrane, continue to vacuum filter the PEDOT:PSS suspension with a mass fraction of 1%, and continue to deposit a 20 μm th...

Embodiment 3

[0044] (1) 15% by mass fraction of PVDF was dissolved in a DMF:acetone solvent with a volume ratio of 1:1, and magnetically stirred at 60° C. for 2 hours until completely dissolved to obtain a spinning solution.

[0045] (2) The spinning solution was electrospun at 15° C. and 50% humidity, with a propulsion speed of 20 μL / min, a spinning voltage of 9.5 kV, and a receiving distance of 15 cm to form a 50 μm thick PVDF electrospun film.

[0046] (3) Grind 450 mg of CNTs, add to 1 L of water, stir for 3 h, and ultrasonically disperse for 1 h to obtain a uniform CNTs dispersion.

[0047] (4) Using the electrospun membrane as a filter membrane, the CNTs dispersion was first subjected to vacuum filtration to obtain a porous composite membrane deposited with 15 μm thick CNTs.

[0048] (5) Use the porous composite membrane deposited with CNTs as a filter membrane, continue to vacuum filter the PEDOT:PSS suspension with a mass fraction of 1.5%, and continue to deposit a 15 μm thick PEDOT:...

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Abstract

The invention belongs to the technical field of piezoelectric sensing materials, and in particular relates to a flexible integrated piezoelectric sensing material and a preparation method thereof. The present invention adopts electrospinning method to prepare PVDF, PVDF-TrFE macromolecule flexible film, adopts carbon nanotube, PEDOT:PSS to carry out composite, carries out room temperature lamination with PVDF electrospinning film to obtain the piezoelectric sensor with excellent mechanical and electrical properties composite material. The preparation method of the present invention is simple and easy, the parameters are adjustable, no adhesive is used in the compounding and laminating process, no other invalid components are introduced, the material responds sensitively, the piezoelectric current is low, it is safe and harmless to the human body, and it is completely adaptable to the human body. Requirements for wearable sensor devices.

Description

technical field [0001] The invention belongs to the technical field of piezoelectric sensing materials, and in particular relates to a flexible sensing material integrating electrode materials prepared by multi-layer suction filtration and piezoelectric materials prepared by electrostatic spinning and a preparation method thereof. Background technique [0002] In recent years, with the development of artificial intelligence and intelligent detection technology, the demand for wearable sensing materials is also increasing. The materials are required to be light, flexible and have a certain mechanical strength, so that they can be attached to human skin or curved surface structures. , and carry out sensitive signal capture, and convert temperature signal, chemical signal or action signal into electrical signal for output, so that it can be monitored and processed by computer. [0003] Piezoelectric sensors are a type of stress sensors that can convert pressure signals into vol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D04H1/728D01D5/00B05D7/04B05D7/24
CPCB05D7/04B05D7/24D01D5/003D04H1/728D10B2505/00
Inventor 宾月珍马小涵言驿鹏
Owner DALIAN UNIV OF TECH
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