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Flexible piezoresistive composite material and preparation method thereof

A composite material and flexible technology, applied in the field of materials, can solve the problems of sensitivity, hysteresis, cycle stability and high temperature resistance, which limit practical applications, etc., to achieve strong high temperature resistance and reduce manufacturing costs.

Pending Publication Date: 2022-03-22
XIAMEN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] It is the performance of the piezoresistive material that plays a decisive role in the performance of the entire pressure sensor. However, the sensitivity, hysteresis, cycle stability, and high temperature resistance of the existing piezoresistive materials are not very ideal. its practical application

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  • Flexible piezoresistive composite material and preparation method thereof
  • Flexible piezoresistive composite material and preparation method thereof
  • Flexible piezoresistive composite material and preparation method thereof

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preparation example Construction

[0032] Embodiments of the present invention provide a flexible piezoresistive composite material and a preparation method thereof, comprising the following steps:

[0033] S1, ultrasonically blending graphene oxide, nano zinc oxide and n-hexane to obtain solution A;

[0034] S2, ultrasonically blending the copper nanoparticles and n-hexane for 10-20 min, and then stirring for 20-40 min to obtain solution B;

[0035] S3, ultrasonically blending the silicone rubber and n-hexane for 15-25 minutes, and then stirring to obtain solution C;

[0036] S4, add solution A and solution B to solution C at a titration rate of 5-15mL / min, stir for 1.5-2.5h, and store under vacuum for 0.5-1.5h to obtain the flexible piezoresistive composite material.

[0037] In the method of this embodiment, graphene oxide (GO), as a derivative of graphene, loses its highly conjugated structure during oxidation, but retains the overall layered structure, and the introduction of functional groups makes graph...

Embodiment 1

[0049] First, 0.5 g of graphene oxide and 0.01 g of nano-zinc oxide were ultrasonically blended with n-hexane, which was designated as solution A.

[0050] 0.02 g of copper nanoparticles (100 nm in diameter) were ultrasonicated in n-hexane for 15 minutes, then magnetically stirred for 30 minutes, and then dispersed into n-hexane, which was designated as solution B.

[0051] 5 g of silicone rubber and n-hexane were mechanically stirred and ultrasonically blended for 20 minutes to obtain silicone rubber suspension C. Add solution A and solution B into silicone rubber suspension C at a titration rate of 10 mL / min for mechanical stirring to achieve solution blending. After fully mixing for 2 hours, store it under vacuum conditions for 1 hour to remove the air bubbles in the composite material and obtain the piezoresistive composite material

[0052] The piezoresistive composite material is printed on the FPC board by screen printing. Before printing the piezoresistive composite m...

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Abstract

The invention provides a flexible piezoresistive composite material and a preparation method thereof, and the preparation method comprises the following steps: S1, carrying out ultrasonic blending on graphene oxide, nano zinc oxide and normal hexane to obtain a solution A; s2, carrying out ultrasonic blending on copper nanoparticles and normal hexane for 10 to 20 minutes, and then stirring for 20 to 40 minutes, so as to obtain a solution B; s3, carrying out ultrasonic blending on organic silicon rubber and normal hexane for 15-25 minutes, and stirring to obtain a solution C; and S4, adding the solution A and the solution B into the solution C at a titration speed of 5-15 mL / min, stirring for 1.5-2.5 h, and storing for 0.5-1.5 h under a vacuum condition to obtain the flexible piezoresistive composite material. The flexible piezoresistive composite material has the advantages of high sensitivity, stable signal change, hysteresis performance, cycling stability and relatively strong high temperature resistance, and has relatively outstanding advantages in industrialization and practical application.

Description

technical field [0001] The invention relates to a flexible piezoresistive composite material and a preparation method thereof, belonging to the technical field of materials. Background technique [0002] A pressure sensor is a sensor device that converts a pressure signal into an electrical signal output. There are many types of pressure sensors: such as piezoelectric, piezoresistive and capacitive pressure sensors. In recent years, pressure sensors have been used in a wide range of applications, not only in industry and scientific research, but also in daily life. Because the piezoresistive sensor has the advantages of large measurement range, good temperature stability, high sensitivity, small hysteresis, short response time, low cost, strong reliability, simple structure, and good linear characteristics, it is better than piezoelectric and capacitive sensors. Sensors are more advantageous. [0003] It is the performance of the piezoresistive material that plays a decisi...

Claims

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Application Information

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IPC IPC(8): H01C7/108H01C7/112H01C7/115H01C17/00H01C17/065
CPCH01C7/108H01C7/112H01C7/115H01C17/003H01C17/06513H01C17/06546H01C17/06533
Inventor 洪文晶池标方志群黄宝贵朱时华张艺红陈海燕吴相福陈嘉彦
Owner XIAMEN UNIV