Flexible pulse sensor and manufacturing method thereof

A pulse sensor, flexible technology, applied in the direction of gaseous chemical plating, metal material coating process, catheter, etc., to achieve good mechanical stability, enhance mechanical stability, and increase the effect of interaction

Active Publication Date: 2017-05-17
THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But it may be able to detect the health of some larger structures
[0010] However, there is no relevant report on the use of carbon nanotube-graphene composite films as pulse sensors in the prior art

Method used

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  • Flexible pulse sensor and manufacturing method thereof
  • Flexible pulse sensor and manufacturing method thereof

Examples

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preparation example Construction

[0072] A kind of preparation method of the flexible pulse sensor based on carbon nanotube-graphene composite film, comprises the following steps (flow chart as image 3 shown):

[0073] (1) Mix the matrix of PDMS and the curing agent at a mass ratio of 5-15:1, and put it into a vacuum desiccator to vacuumize to remove air bubbles;

[0074] (2) Float the flat copper sheet with carbon nanotube-graphene composite film upside down (the film is facing down) on the liquid PDMS, wherein the carbon nanotube-graphene composite film is prepared as follows: chemical vapor phase The carbon nanotube film synthesized by the deposition method is transferred to the copper sheet, and then the graphene is grown in the pores of the carbon nanotube by chemical vapor deposition to obtain the carbon nanotube-graphene composite film on the copper sheet (refer to the patent disclosed in 201410128376.0 Preparation method preparation), the preparation schematic diagram of carbon nanotube-graphene comp...

Embodiment 1

[0080] A method for preparing a flexible pulse sensor based on carbon nanotube-graphene composite film, comprising the steps of:

[0081] (1) Transfer the carbon nanotube film with a light transmittance of 90% to the surface of the copper foil, place the copper foil in a tube furnace, and evacuate to 5.0×10 -2 Torr, the argon gas with a flow rate of 300 sccm and the hydrogen gas with a flow rate of 60 sccm are introduced, the temperature of the tube furnace is raised to 1000 ° C within 40 minutes, and the temperature is continued for 30 minutes, and then the methane with a flow rate of 20 sccm is fed in, and the reaction is continued for 30 minutes; the temperature is lowered to room temperature, Obtain a carbon nanotube-graphene composite film with a light transmittance of 86% on copper foil;

[0082] (2) The copper sheet for growing carbon nanotubes-graphene is buckled upside down to the surface of liquid PDMS where the PDMS precursor liquid and curing agent are mixed in a m...

Embodiment 2

[0087] A method for preparing a flexible pulse sensor based on carbon nanotube-graphene composite film, comprising the steps of:

[0088] (1) Transfer the carbon nanotube film with a transmittance of 85% to the surface of the copper foil, place the copper foil in a tube furnace, and evacuate to 4.2×10 -2 Torr, argon gas with a flow rate of 500 sccm and hydrogen gas with a flow rate of 80 sccm were introduced, and the temperature of the tube furnace was raised to 1050 ° C within 60 minutes, and the temperature was continued for 30 minutes, and then methane with a flow rate of 10 sccm was introduced, and the reaction was continued for 30 minutes. Cool down to room temperature to obtain a carbon nanotube-graphene composite film with a transmittance of 80% on the copper foil;

[0089] (2) Invert the copper sheet for growing carbon nanotubes-graphene onto the surface of liquid PDMS where the PDMS precursor liquid and curing agent are mixed in a mass ratio of 10:1 and the air bubble...

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Abstract

The invention provides a flexible pulse sensor and a manufacturing method thereof. The flexible pulse sensor comprises a flexible base, carbon nano tube-graphene composite film of which part is embedded into the flexible base, and electrodes, wherein the electrodes are arranged at two ends of the carbon nano tube-graphene composite film; the thickness of the flexible base is 0.8-1.2mm; the light transmittance of the initial carbon nano tube is 85-95%, and the light transmittance of the carbon nano tube-graphene composite film obtained through chemical vapor deposition is 80-92%. According to the flexible pulse sensor and the manufacturing method thereof, the carbon nano tube, the graphene and the flexible base synergize with one another so that the flexible pulse sensor can not only have the advantages of the graphene and the carbon nano tube sensor but also avoid the disadvantages of the graphene and the carbon nano tube sensor, the mechanical stability of a strain sensor is strengthened, the pulse sensor does not lose efficacy within at least 10% of strain ranges, the pulse sensor can effectively catch pulse signals, and the detecting effect is reached.

Description

technical field [0001] The invention belongs to the technical field of nanometer devices, and relates to a flexible pulse sensor and a preparation method thereof. Background technique [0002] The detection of human pulse signal is of great significance for the timely diagnosis of diseases. Since the pulse can cause deformation of the skin surface, a strain sensor can be used to detect the pulse signal. However, the strain signal caused by the pulse is usually very weak, so the pulse sensor needs to have a sufficiently high sensitivity to small strains. In the actual detection process, due to the large strain caused by muscle movement, although these strain signals can be processed by filtering, the pulse sensor needs to ensure that it will not fail under these strains in order to ensure the normality of the daily pulse measurement process. conduct. [0003] Carbon nanomaterials are often used in the preparation of strain sensors due to their high transparency, electrical...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/02C23C16/26C23C16/01
CPCA61B5/02C23C16/01C23C16/26
Inventor 方英史济东李红变李昕明
Owner THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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