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Flexible air-permeable pressure sensor based on friction nano-generator and fabrication thereof

A pressure sensor and nanogenerator technology, applied in sensors, lamination, electrospinning, etc., can solve problems such as difficulty in meeting the needs of wearable human physiological signal monitoring, inability to meet human pulse measurement, lack of flexibility and breathability, etc. , to achieve the effect of ensuring comfort, wide application space and high sensitivity

Active Publication Date: 2017-12-22
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these sensors currently have disadvantages such as complex preparation process, poor sensitivity, lack of flexibility and air permeability, and it is difficult to meet the needs of wearable and human physiological signal monitoring.
In order to meet the wearable needs of the human body, the domestic patent CN104963089A discloses a soft and breathable electrode film material and a tactile sensor, but the tactile sensor is based on the piezoelectric principle and has a sensitivity of tens of pC / (N cm 2 ), the sensitivity is low, and it cannot meet the measurement of weak signals such as human pulse

Method used

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  • Flexible air-permeable pressure sensor based on friction nano-generator and fabrication thereof
  • Flexible air-permeable pressure sensor based on friction nano-generator and fabrication thereof
  • Flexible air-permeable pressure sensor based on friction nano-generator and fabrication thereof

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Effect test

Embodiment 1

[0039] A gas-permeable flexible pressure sensor based on a triboelectric nanogenerator, including a flexible carbon nanofiber film and a nanofiber film obtained by electrospinning on it, and the flexible carbon nanofiber film is obtained by electrospinning Nanoparticle-doped fiber films were obtained by carbonization. The preparation method of the air-permeable flexible pressure sensor based on the triboelectric nanogenerator is as follows:

[0040] Step 1: Add 6g of polyvinylidene fluoride (with a weight average molecular weight of 570,000) into 24g of N,N-dimethylformamide solvent, and stir in a water bath at 80°C for 10 hours to form a uniform and stable solution. After it was naturally cooled to room temperature, it was added to an electrospinning device for electrospinning to prepare a nanofiber film with a thickness of 30 μm. The spinning parameters were: voltage 30kV, receiving distance 25cm, perfusion speed 2mL / h, temperature 25°C , relative humidity 45%.

[0041] Th...

Embodiment 2

[0046] A gas-permeable flexible pressure sensor based on a triboelectric nanogenerator, including a flexible carbon nanofiber film and a nanofiber film obtained by electrospinning on it, and the flexible carbon nanofiber film is obtained by electrospinning Nanoparticle-doped fiber films were obtained by carbonization. The preparation method of the air-permeable flexible pressure sensor based on the triboelectric nanogenerator is as follows:

[0047] Step 1: Add 4.5g of polyvinylidene fluoride-trifluoroethylene (weight average molecular weight: 470,000 to 570,000) into 25.5g of N,N-dimethylformamide solvent, and stir in a water bath at 80°C for 12 hours to form Uniform and stable solution. After it was naturally cooled to room temperature, it was added to an electrospinning device for electrospinning to prepare a nanofiber film with a thickness of 20 μm. The spinning parameters were: voltage 10 kV, receiving distance 15 cm, perfusion speed 1.44 mL / h, temperature 25 ℃, relativ...

Embodiment 3

[0053] A gas-permeable flexible pressure sensor based on a triboelectric nanogenerator, including a flexible carbon nanofiber film and a nanofiber film obtained by electrospinning on it, and the flexible carbon nanofiber film is obtained by electrospinning Nanoparticle-doped fiber films were obtained by carbonization. The preparation method of the air-permeable flexible pressure sensor based on the triboelectric nanogenerator is as follows:

[0054] Step 1: Add 10.5 g of polystyrene (weight-average molecular weight: 190,000) into 19.5 g of tetrahydrofuran solvent, and stir at room temperature of 25° C. for 12 h to form a uniform and stable solution. Then it was added to the electrospinning device for electrospinning to prepare a nanofiber film with a thickness of 50 μm. The spinning parameters were: voltage 10kV, receiving distance 35cm, perfusion speed 0.42mL / h, temperature 25°C, relative humidity 45%. .

[0055] The second step: 6.0g polyvinylpyrrolidone (weight-average mo...

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Abstract

The invention provides a flexible air-permeable pressure sensor based on a friction nano-generator and a fabrication method thereof. The flexible air-permeable pressure sensor based on a friction nano-generator is characterized by comprising a flexible carbon nano-fiber thin film and a nano-fiber thin film installed thereon and obtained through electrostatic spinning; the flexible carbon nano-fiber thin film is obtained through carbonizing nano particles doped fiber thin film obtained through electrostatic spinning. The pressure sensor prepared by the invention can effectively monitor the change of external force and has high sensitivity; the air-permeable and flexible characteristics ensure the wearing comfort of human body; the pressure sensor has wide application space in the field of medical wearable detection of human body.

Description

technical field [0001] The invention belongs to the technical field of novel sensors, and in particular relates to a method for preparing a breathable flexible pressure sensor based on a frictional nanogenerator. Background technique [0002] In order to meet people's needs for real-time monitoring of health status, more and more research teams have combined micro-nano electronic technology and medical detection technology to design wearable sensors for monitoring human heartbeat, pulse, blood sugar, blood pressure and other physiological signals. Among them, the comprehensive information such as the shape, intensity and rate of the pulse and heartbeat can effectively reflect many physiological and pathological characteristics of the human cardiovascular system. Real-time detection of human physiological signals such as pulse signals through pressure sensor technology can not only prevent cardiovascular diseases in time, but also assist the human body to regulate exercise. ...

Claims

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Application Information

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IPC IPC(8): D01D5/00D04H1/728D01F9/10D01F1/10A61B5/00B32B37/00
CPCA61B5/6801A61B5/6843B32B37/00D01D5/003D01F1/10D01F9/10D04H1/728
Inventor 李召岭沈家力丁彬俞建勇
Owner DONGHUA UNIV
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