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Graphene/carbon nanotube (CNTs) flexible pressure sensor and manufacturing method

A technology of pressure sensors and carbon nanotubes, which is applied in the direction of instruments, measuring force, measuring devices, etc., can solve the problems of difficult operation and high cost, and achieve the effect of easy operation, adjustable size and low cost

Active Publication Date: 2021-05-28
TIANJIN CHENGJIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, they are still not easy to operate and too expensive for most wearable devices

Method used

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  • Graphene/carbon nanotube (CNTs) flexible pressure sensor and manufacturing method
  • Graphene/carbon nanotube (CNTs) flexible pressure sensor and manufacturing method
  • Graphene/carbon nanotube (CNTs) flexible pressure sensor and manufacturing method

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Experimental program
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Effect test

preparation example Construction

[0034] The ease of preparation of the PS microsphere array (2) and the influence on the sensitivity of the sensor are related to the diameter of the microspheres.

[0035] The conductivity of the graphene / multi-wall carbon nanotube mixed conductive coating (3) is significantly enhanced as the number of conductive coating layers increases within 1 to 3 layers.

[0036] The concentration of the copper paste (4) will affect the overall resistance of the sensor.

[0037] The width of the insulating tape (6) is 0.5cm.

[0038] The preparation method of described a kind of graphene / CNTs flexible pressure sensor is characterized in that, comprises the following steps:

[0039] S1: Mix the prepolymer and the curing agent at a ratio of 10:1, stir well and let it stand still. After the air bubbles escape to the surface of the solution and burst, put it in an electric heating constant temperature blast drying oven at 60°C for about 30 minutes to obtain PDMS.

[0040] S2: Use a microgu...

Embodiment

[0047] Mix 9.1g of prepolymer with 0.9g of curing agent, stir well and let it stand for 20 minutes, pour it evenly on the silicon wafer, put it in an electric heating constant temperature blast drying oven at 60°C for about 30 minutes, and obtain a PDMS film, cut it A thin slice of 3 x 1 cm.

[0048] Take 100 μL of PS microsphere solution with a diameter of 2 μm and 500 μL alcohol in a plastic U-shaped tube, close the U-shaped tube and place it in an ultrasonic cleaner to vibrate for 5 minutes, take 80 μL of the mixed solution and drop it into a sink filled with 1 L of clear water, let The microspheres were free to assemble for 2 minutes, and then dipped a drop of detergent solution with a plastic tube, immersed in the water surface, and gathered the microspheres together to form an orderly and compact array of PS microspheres.

[0049] The PDMS flakes were bombarded with oxygen plasma for 30s to make the surface of the PDMS flakes hydrophilic, then the PDMS flakes were clamped ...

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Abstract

The invention discloses a graphene / CNTs flexible pressure sensor and a manufacturing method, and particularly relates to the field of flexible electronic skin. The manufacturing method of the flexible pressure sensor comprises the following steps: firstly, mixing a prepolymer and a curing agent to prepare PDMS; then, producing a PS microsphere array; then, transferring the PS microsphere array to the surface of the PDMS; then, uniformly coating a graphene / CNTs mixed conductive solution; then, putting a copper wire at one end and coating copper paste; and finally, attaching surfaces, with the conductive coatings, of the two electrodes manufactured in the previous step together in a face-to-face mode and fixing through an insulating tape. The manufacturing method provided by the invention is simple and convenient to operate and low in cost, the shape and size of the sensor are adjustable, and the sensitivity of the sensor can be changed by adjusting the size of the PS microsphere array and the number of layers of the conductive coating.

Description

technical field [0001] The invention belongs to the field of flexible electronic skin, and in particular relates to a graphene / CNTs flexible pressure sensor and a manufacturing method. Background technique [0002] The flexible pressure sensor is an important part of the flexible electronic skin. Pressure sensors, also known as tactile / strain sensors, have attracted the attention of many researchers in recent years, especially for electronic skin-based flexible pressure sensors. Due to its unique advantages of flexibility, durability, biocompatibility, and lightweight, flexible strain and pressure sensors can be tightly attached to human skin, it facilitates real-time monitoring of various physiological signals such as heart rate, pulse, and respiratory rhythm Wait. Carbon nanotubes and graphene are nanocarbon materials with excellent mechanical and electrical properties. The tensile strength of multi-walled carbon nanotubes is 11-63GPa, the Young's modulus is 270-950GPa,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L1/22
CPCG01L1/2293
Inventor 罗春丽苏兴杰闫卫国
Owner TIANJIN CHENGJIAN UNIV
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