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Preparation of flexible pressure sensor for monitoring motion signal and human body pulse signal

A technology of pressure sensor and pulse signal, which is applied in the measurement and application of sensors and piezoelectric devices, can solve the problems that it is difficult to further improve the output performance of friction nanogenerators, it is unfavorable for large-scale production, and the equipment is expensive. Achieve real-time monitoring and information feedback, improve electrical output performance, and simplify equipment

Active Publication Date: 2019-11-05
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above methods for preparing rough structures use expensive equipment, high cost, and complicated processes, which are not conducive to large-scale production, and it is difficult to further improve the output performance of triboelectric nanogenerators.

Method used

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  • Preparation of flexible pressure sensor for monitoring motion signal and human body pulse signal
  • Preparation of flexible pressure sensor for monitoring motion signal and human body pulse signal
  • Preparation of flexible pressure sensor for monitoring motion signal and human body pulse signal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A method for preparing a flexible pressure sensor for monitoring motion signals and human pulse signals, the specific steps are:

[0043] Step 1: Add ethyl cellulose to a mixed solvent of acetone and polydimethylacetamide (volume ratio: 4 / 1), and keep stirring at 25°C for 30 minutes to prepare a uniform and stable solution with a mass fraction of 30%. Triboelectrically positive polymer spinning solution. Silver nanowires were added to a mixed solvent of acetone and N,N-dimethylformamide (volume ratio: 4 / 6), and ultrasonically treated at 25-40°C for 2 hours to prepare a homogeneous solution with a mass fraction of 0.005%. Then polyvinylidene fluoride powder was slowly added into the solution, and stirred continuously at 50° C. for 2 hours to prepare a triboelectronegative polymer spinning solution with a mass fraction of 15%.

[0044] Step 2: Electrospinning the triboelectrically positive polymer spinning solution and the triboelectrically negative polymer spinning solu...

Embodiment 2

[0051] A method for preparing a flexible pressure sensor for monitoring motion signals and human pulse signals, the specific steps are:

[0052] Step 1: Add ethyl cellulose to a mixed solvent of acetone and polydimethylacetamide (volume ratio: 4 / 1), and keep stirring at 25°C for 30 minutes to prepare a uniform and stable solution with a mass fraction of 35%. Triboelectrically positive polymer spinning solution. Silver nanowires were added to acetone and N,N-dimethylformamide mixed solvent (volume ratio: 4 / 6), ultrasonicated at 25-40°C for 2h to prepare a homogeneous solution with a mass fraction of 0.005%, and then Slowly add polyvinylidene fluoride powder into the solution, and keep stirring at 50° C. for 2 hours to prepare a triboelectronegative polymer spinning solution with a mass fraction of 15%.

[0053] Step 2: Electrospinning the triboelectrically positive polymer spinning solution and the triboelectrically negative polymer spinning solution obtained in step 1 respect...

Embodiment 3

[0059] A method for preparing a flexible pressure sensor for monitoring motion signals and human pulse signals, the specific steps are:

[0060] Step 1: Add ethyl cellulose to a mixed solvent of acetone and polydimethylacetamide (volume ratio: 4 / 1), and keep stirring at 25°C for 30 minutes to prepare a uniform and stable solution with a mass fraction of 35%. Triboelectrically positive polymer spinning solution. Silver nanowires were added to acetone and N,N-dimethylformamide mixed solvent (volume ratio: 4 / 6), ultrasonicated at 25-40°C for 2h to prepare a homogeneous solution with a mass fraction of 0.005%, and then Slowly add polyvinylidene fluoride powder into the solution, and keep stirring at 50° C. for 2 hours to prepare a triboelectronegative polymer spinning solution with a mass fraction of 15%.

[0061] Step 2: Electrospinning the triboelectrically positive polymer spinning solution and the triboelectrically negative polymer spinning solution obtained in step 1 respect...

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Abstract

The invention provides a preparation method of a flexible pressure sensor for monitoring a motion signal and a human body pulse signal. The preparation method is characterized by comprising the following steps: preparing a frictional electricity positive polymer spinning solution and a frictional electricity negative polymer spinning solution, wherein the frictional electricity negative polymer spinning solution contains nanowire; respectively performing static spinning to obtain a frictional electricity positive fiber thin-film and a frictional electricity negative fiber thin-film; preparinga solution containing the polymer and the curing agent, and pouring the solution on the obtained preparation die, and curing the same to obtain a flexible support base material, wherein a groove is formed on an upper surface of the flexible support base material; respectively forming electrodes on the backs of the frictional electricity positive fiber thin-film and the frictional electricity negative fiber thin-film, and assembling to obtain the flexible pressure sensor for monitoring the motion signal and the human body pulse signal. The preparation method provided by the invention has extensive application prospect in the intelligent wearable field, the carry-on motion health and physiological signal monitoring and like fields.

Description

technical field [0001] The invention belongs to the fields of pressure sensors, smart wearables and sports health monitoring, and in particular relates to a preparation method of a fiber-based high-sensitivity flexible pressure sensor for monitoring body motion signals and human pulse signals. Background technique [0002] With the rapid development of modern technology and the continuous improvement of living standards, the real-time monitoring of human sports health and pulse signals plays an increasingly important role in disease diagnosis, treatment and health assessment. To achieve real-time monitoring of human body health and pulse signals, the urgent problem is to ensure the sensitivity, stability and continuity of energy supply of the sensor. One of the effective solutions is to design and prepare a high-sensitivity sensor with self-driving function. sensor. The triboelectric nanogenerator based on triboelectrification and electrostatic inductive coupling effects ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L1/16A61B5/0205A61B5/11
CPCA61B5/0205A61B5/11G01L1/16
Inventor 李召岭楼梦娜朱苗苗丁彬俞建勇
Owner DONGHUA UNIV
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