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A kind of manufacturing method of flexible pressure sensor

A pressure sensor and manufacturing method technology, applied in manufacturing tools, additive manufacturing, instruments, etc., can solve the problems of copper film plastic deformation, FPC failure, failure, etc., and achieve the effect of strong adaptability and low cost

Active Publication Date: 2022-04-01
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most FPCs are made of polyimide as the outer film and copper film as the wire. When the deformation is large, the copper film will be plastically deformed or even broken, and there is a risk of failure.
If folding occurs, the FPC will fail faster

Method used

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  • A kind of manufacturing method of flexible pressure sensor
  • A kind of manufacturing method of flexible pressure sensor
  • A kind of manufacturing method of flexible pressure sensor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0064] A method of manufacturing the above-mentioned flexible pressure sensor, comprising the following steps:

[0065] (1) Preparation of flexible conductive 3D printing functional materials

[0066] Weighed 13.5g of multi-walled carbon nanotubes (MWNTs), 9g of mesophase carbon microspheres (MCMB) and 127.5g of thermoplastic polyurethane (TPU) in a beaker, and mechanically mixed to obtain a total of 150g of raw materials. Put the raw materials into a single-screw extruder, and carry out melt blending and extrusion at 190°C, wherein the screw speed is 30r / min, the cooling water temperature is 25°C, and the pulling speed is 20cm / min to obtain a linear shape with a diameter of 1.75mm. 3D printing functional material consumables.

[0067] (2) Preparation of gallium-based liquid metal

[0068] Put the gallium ingot in a vacuum oven at 60°C and heat it for 3 hours to turn it into a liquid state, then weigh the raw materials according to the mass ratio of gallium: indium: tin = 67...

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Abstract

The invention relates to a flexible pressure sensor and a manufacturing method thereof. A flexible pressure sensor includes an insulating shell, a flexible wire layer of a micro-channel, and a pressure-sensitive layer; the flexible wire layer of the micro-channel is arranged in the insulating shell, and the The center of the flexible wire layer of the microchannel is provided with a "return" type flow channel, and the liquid metal is filled in the "return" type flow channel; A groove is provided at the corresponding position of the flexible wire of the "type flexible micro-channel, and the groove is filled with a flexible pressure-sensitive material. The invention uses a 3D printing method to manufacture a conductive composite material sensor and an internal micro-flow channel at one time, injects gallium-based liquid metal into the micro-flow channel and closes the injection port to realize circuit connection, and obtains a bending-resistant flexible pressure sensor.

Description

technical field [0001] The invention belongs to the field of pressure sensors, and relates to a flexible pressure sensor and a manufacturing method thereof. Background technique [0002] As a new type of pressure sensor, the flexible pressure sensor has the function of multi-point measurement and can measure the pressure change of complex curved surfaces. It can be used in various aspects such as human body motion monitoring, industrial complex surface pressure sensing, and internal pressure testing of lithium-ion batteries. Flexible pressure sensors generally consist of two parts: flexible sensing functional materials and flexible circuits. [0003] Currently, flexible functional materials such as organic semiconductor materials and nanomaterials are commonly used. An organic field effect sensor is a field effect transistor composed of organic semiconductor materials, and its processing technology is complex. Flexible conductive composite materials also have pressure-sens...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01L1/22B29C48/05B29C64/118B33Y10/00B33Y70/10
CPCG01L1/22B29C48/05B29C64/118B33Y10/00B33Y70/10
Inventor 罗鲲蓝嘉昕诸葛祥群刘通罗志虹
Owner CHANGZHOU UNIV