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Preparation method for polymer-based composite flexible piezoelectric sensor

A flexible piezoelectric and polymer technology, applied in the field of sensors, can solve the problems of small piezoelectric coefficient and electro-mechanical coupling coefficient, problems of temperature characteristics and aging characteristics, and hard molding and processing of lead zirconate titanate, etc., to achieve low dielectric The effect of electrical coefficient, excellent chemical sensitivity, and simple manufacturing process

Active Publication Date: 2019-01-25
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The hard and brittle characteristics of lead zirconate titanate bring difficulties to the molding process, and the arbitrary shape cannot be obtained, and the impact resistance is poor, so its application is severely restricted
Some polymer materials have good flexibility and can be made into large and uniform films, but their piezoelectric coefficients and electro-mechanical coupling coefficients are small, and there are problems with temperature characteristics and aging characteristics

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Preparation of lead zirconate titanate ultrafine ceramic powder: butyl titanate, lead acetate and zirconium dioxide were used as raw materials, the raw material was 10 mg, the mass ratio of zirconium and titanium was controlled to be 52:48, and deionized water, A mixed solution of ethylene glycol, diethyl ether and methyl ether is used as a solvent. The mixed solution is 80 mL, heated and stirred for 3 hours, and the lead zirconate titanate sol is obtained after uniform stirring, which is dried in an oven at a temperature of 70°C for 8 hours to remove water and organic matter. The solvent forms a xerogel, put the xerogel in a muffle furnace for calcination, the temperature of the muffle furnace is raised to 700°C, the temperature is kept constant for 4 hours, the heating rate is 5°C / min, and it is taken out after cooling to obtain ultrafine lead zirconate titanate ceramic powder.

[0034] (2) Preparation of zinc oxide nanorods: using the electrochemical deposition m...

Embodiment 2

[0040] (1) Preparation of lead zirconate titanate ultrafine ceramic powder: butyl titanate, lead acetate and zirconium dioxide were used as raw materials, the raw material was 13 mg, the mass ratio of zirconium and titanium was controlled to be 52:48, and deionized water, A mixed solution of ethylene glycol, diethyl ether and methyl ether was used as the solvent. The mixed solution was 90 mL, heated and stirred for 3 hours, and the lead zirconate titanate sol was obtained after uniform stirring, which was dried in an oven at 75°C for 7 hours to remove water and organic matter. The solvent forms a xerogel, and the xerogel is put into a muffle furnace for calcination. The temperature of the muffle furnace is raised to 650°C, kept at a constant temperature for 3 hours, and the heating rate is 5°C / min. ceramic powder.

[0041] (2) Preparation of zinc oxide nanorods: using the electrochemical deposition method, using a two-electrode system, taking zinc nitrate solution as the elect...

Embodiment 3

[0047] (1) Preparation of lead zirconate titanate ultrafine ceramic powder: butyl titanate, lead acetate and zirconium dioxide were used as raw materials, the raw material was 15 mg, the mass ratio of zirconium and titanium was controlled to be 52:48, and deionized water, The mixed solution of ethylene glycol, diethyl ether and methyl ether is used as the solvent, the mixed solution is 100mL, heated and stirred for 4 hours, and the lead zirconate titanate sol is obtained after stirring evenly, which is dried in an oven at 80°C for 6 hours to remove water and organic matter. The solvent forms a xerogel, put the xerogel in a muffle furnace for calcination, the temperature of the muffle furnace is raised to 700°C, the temperature is kept constant for 4 hours, the heating rate is 5°C / min, and it is taken out after cooling to obtain ultrafine lead zirconate titanate ceramic powder.

[0048] (2) Preparation of zinc oxide nanorods: using the electrochemical deposition method, using a...

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Abstract

The invention relates to the field of sensors, and discloses a preparation method for a polymer-based composite flexible piezoelectric sensor. According to the method, an ultrafine lead zirconate titanate ceramic and a zinc oxide nanorod array are firstly prepared, the rod array is then implanted into a mold, so that a polymer-based piezoelectric material is prepared, the mixture of epoxy resin and styrene-butadiene-styrene block copolymer is injected into the mold, and after polymer base solidification, by polarization, the polymer-based composite flexible piezoelectric sensor is obtained. The polymer-based composite flexible piezoelectric sensor has more excellent detection performance, the flexibility of the used polymer material is good, a large and uniform film can be produced, the piezoelectric coefficient and the electro-mechanical coupling coefficient are low, a composite material with certain piezoelectric performance can be prepared after combination, the defects of both areovercome, the polymer-based composite flexible piezoelectric sensor has high piezoelectricity, low brittleness, low density and low dielectric coefficient, moreover, large-area sheets and products with complex shapes can be easily produced, the production process is simple, and the cost is low.

Description

technical field [0001] The invention relates to the field of sensors, in particular to a preparation method of a polymer-based composite flexible piezoelectric sensor. Background technique [0002] Sensors are human beings' own detection of various sensory information in nature, and can convert different signals and sensory information into important digital and intelligent devices. In the process of the rapid development of information technology in human civilization, sensors have played an increasingly important role. They are one of the important means for human beings to explore the unknown world, understand the real world and observe surrounding information. A sensor is an adjustable component that can convert non-electrical signals such as electricity, light, temperature, and chemical action into electrical signals. [0003] Lead zirconate titanate / polymer composite material is a new type of functional piezoelectric material. Its dielectric and piezoelectric proper...

Claims

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Application Information

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IPC IPC(8): C08L63/00C08L53/02C08K9/02C08K7/00C08J3/28C08J5/18G01L1/16
CPCC08J3/28C08J5/18C08J2363/00C08J2453/02C08K7/00C08K9/02C08K2201/011G01L1/16
Inventor 万军民吕思佳胡智文王秉彭志勤
Owner ZHEJIANG SCI-TECH UNIV
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