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A flexible and stretchable multifunctional nanofiber sensor and its preparation method

A nanofiber and nanofiber membrane technology is applied in the field of multifunctional nanofiber sensors and their preparation, and achieves the effects of fast response speed, high electrical conductivity, and simple and easy manufacturing process.

Inactive Publication Date: 2019-04-26
ZHONGYUAN ENGINEERING COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the current research on sensors is still in response to a single mechanical stimulus, and it is still a challenge to construct a sensor that can simultaneously monitor and respond to tension, pressure, and bending.

Method used

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  • A flexible and stretchable multifunctional nanofiber sensor and its preparation method
  • A flexible and stretchable multifunctional nanofiber sensor and its preparation method
  • A flexible and stretchable multifunctional nanofiber sensor and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The preparation method of the flexible and stretchable multifunctional nanofiber sensor of this embodiment is as follows:

[0030] (1) Dimethylformamide and tetrahydrofuran were prepared in a mass ratio of 1:0.3 to obtain a mixed solvent, and graphene oxide powder was added to the mixed solvent, and ultrasonically dispersed for 3 h at room temperature to obtain a uniform mass concentration of 0.2 % graphene oxide solution, then adding molecular weight is 80000 polyurethane particles, magnetic stirring at room temperature for 8 h to obtain a mass concentration of 9% polyurethane solution doped graphene oxide;

[0031] (2) The polyurethane solution doped with graphene oxide obtained in step (1) is used as a spinning solution, transferred to a syringe for electrospinning, and the roller is used as a receiving device to obtain a polyurethane nanofiber membrane doped with graphene oxide , the spinning solution flow rate is 0.5 ml / h, the spinning voltage is 18 kV, and the dis...

Embodiment 2

[0038] The preparation method of the flexible and stretchable multifunctional nanofiber sensor of this embodiment is as follows:

[0039] (1) Dimethylformamide and tetrahydrofuran were prepared as a mixed solvent at a mass ratio of 1:0.5, graphene oxide powder was added to the mixed solvent, and ultrasonically dispersed for 4 h at room temperature to obtain a uniform graphene oxide solution with a mass concentration of 0.4 % , and then add polyurethane particles, and stir magnetically at room temperature for 10 h to obtain a polyurethane solution doped with graphene oxide. The molecular weight of described polyurethane is 100000; The mass concentration of polyurethane is 10%; Of graphene oxide;

[0040] (2) The polyurethane solution doped with graphene oxide obtained in step (1) is used as a spinning solution, transferred to a syringe for electrospinning, and the roller is used as a receiving device to obtain a polyurethane nanofiber membrane doped with graphene oxide . The ...

Embodiment 3

[0046] The preparation method of the flexible and stretchable multifunctional nanofiber sensor of this embodiment is as follows:

[0047] (1) Dimethylformamide and tetrahydrofuran were prepared as a mixed solvent at a mass ratio of 1:0.8, graphene oxide powder was added to the mixed solvent, and dispersed ultrasonically for 5 h at room temperature to obtain a uniform graphene oxide solution. Then polyurethane particles were added, and magnetically stirred for 12 h at room temperature to obtain a polyurethane solution doped with graphene oxide. The molecular weight of described polyurethane is 120000; The mass concentration of polyurethane is 11%; The mass concentration of graphene oxide is 0.6%;

[0048] (2) The polyurethane solution doped with graphene oxide obtained in step (1) is used as a spinning solution, transferred to a syringe for electrospinning, and the roller is used as a receiving device to obtain a polyurethane nanofiber membrane doped with graphene oxide . The...

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Abstract

The invention discloses a flexible and extensible multifunctional nanofiber sensor and a preparation method thereof. An electrostatic spinned polyurethane nanofiber membrane doped with graphene oxide is used as a flexible matrix. An in-situ polymerization method is used to in-situ polymerize conductive polymer polythiophene on the surface of the polyurethane nanofiber doped with graphene oxide, and the polyurethane / polythiophene nanofiber membrane which is doped with graphene oxide and is provided with a skin-core structure is prepared. The surface of the nanofiber membrane is compounded with a gel membrane with a conductive copper wire to prepare the flexible and extensible multifunctional nanofiber sensor. The sensor can be used for detecting multi-mechanical stimulation environments with pressure, stretching, bending and the like, and has the advantages of high sensitivity and wide sensing range. In a human body monitoring system, the sensor can monitor pulse, heartbeat, muscle group vibration and other human health physiological indicators in real time, and can detect the full-range movement of a human body, including the movement of facial expressions and large and small joints.

Description

technical field [0001] The invention belongs to the technical field of flexible sensor preparation, in particular to a flexible and stretchable multifunctional nanofiber sensor and a preparation method thereof, which are applied to the monitoring of human health and full range of motion, and in particular to the field of wearable electronic skin. Background technique [0002] Flexible sensors refer to sensors made of flexible materials, which have good flexibility, ductility, and can even be bent or folded freely, and have flexible and diverse structures. Accurate and fast measurement with special signals, so flexible sensing technology plays an important role in artificial intelligence, health medical devices and wearable electronics. The hard and brittle nature of ordinary sensors makes it difficult for electronic devices to bend or extend. Once there is a large deformation, the electronic devices will be damaged. Therefore, the measurement range is also greatly affected. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01L5/00B82Y15/00D06M15/63D06M101/30
CPCB82Y15/00D06M15/63D06M2101/30G01L5/00
Inventor 何建新王利丹邵伟力齐琨周玉嫚佑晓露南楠孙显强胡宝继卢凯崔世忠
Owner ZHONGYUAN ENGINEERING COLLEGE
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