Flexible strain transducer based on carbon nanofiber yarn woven fabric and preparation method thereof

A technology of carbon nanofibers and strain sensors, applied in fabrics, fabric surface trimming, heating/cooling fabrics, etc., can solve the problems of sensor thickness and sensitivity coefficients, achieve high sensitivity coefficients, low energy consumption, and good application prospects

Active Publication Date: 2018-10-19
NANTONG TEXTILE & SILK IND TECH RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a flexible strain sensor with a thin thickness and a high sensitivity coefficient in order to overcome the problems of thicker sensors and lower sensitivity coefficients in the prior art

Method used

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  • Flexible strain transducer based on carbon nanofiber yarn woven fabric and preparation method thereof
  • Flexible strain transducer based on carbon nanofiber yarn woven fabric and preparation method thereof
  • Flexible strain transducer based on carbon nanofiber yarn woven fabric and preparation method thereof

Examples

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Effect test

Embodiment 1

[0048] A method for preparing a flexible strain sensor based on carbon nanofiber yarn fabric, the steps are as follows:

[0049] (1) Preparation of carbon nanofiber yarn fabric:

[0050] (1.1) Utilize the multi-nozzle wet-electrospinning device to prepare polyacrylonitrile nanofiber bundles, and make polyacrylonitrile nanofiber yarns by combining and twisting;

[0051] (1.2) Sizing the polyacrylonitrile nanofiber yarn, the polyacrylonitrile nanofiber yarn after the above sizing is the weft yarn, and the polyacrylonitrile staple fiber yarn is the warp yarn for weaving to obtain the fabric, and then the fabric is desized and ironed Prepared nanofiber yarn woven fabric, wherein the warp density of the fabric is 380 / 10cm, the weft density is 100 / 10cm, and the fabric structure is plain weave;

[0052] (1.3) Pre-oxidize and carbonize the nanofiber yarn fabric to obtain the carbon nanofiber yarn fabric; the pre-oxidation is carried out under air atmosphere, the pre-oxidation heating...

Embodiment 2

[0066] A method for preparing a flexible strain sensor based on carbon nanofiber yarn fabric, the steps are as follows:

[0067] (1) Preparation of carbon nanofiber yarn fabric:

[0068] (1.1) Utilize the multi-nozzle wet-electrospinning device to prepare polyacrylonitrile nanofiber bundles, and make polyacrylonitrile nanofiber yarns by combining and twisting;

[0069] (1.2) Sizing the polyacrylonitrile nanofiber yarn, the polyacrylonitrile nanofiber yarn after the above sizing is the weft yarn, and the polyacrylonitrile staple fiber yarn is the warp yarn for weaving to obtain the fabric, and then the fabric is desized and ironed Prepared nanofiber yarn woven fabric, wherein the warp density of the fabric is 200 / 10cm, the weft density is 50 / 10cm, and the fabric structure is plain weave;

[0070] (1.3) Pre-oxidize and carbonize the nanofiber yarn fabric to obtain the carbon nanofiber yarn fabric; the pre-oxidation is carried out under air atmosphere, the pre-oxidation heating ...

Embodiment 3

[0077] A method for preparing a flexible strain sensor based on carbon nanofiber yarn fabric, the steps are as follows:

[0078] (1) Preparation of carbon nanofiber yarn fabric:

[0079] (1.1) Utilize the multi-nozzle wet-electrospinning device to prepare polyacrylonitrile nanofiber bundles, and make polyacrylonitrile nanofiber yarns by combining and twisting;

[0080] (1.2) Sizing the polyacrylonitrile nanofiber yarn, the polyacrylonitrile nanofiber yarn after the above sizing is the weft yarn, and the polyacrylonitrile staple fiber yarn is the warp yarn for weaving to obtain the fabric, and then the fabric is desized and ironed Prepared nanofiber yarn woven fabric, wherein the warp density of the fabric is 300 / 10cm, the weft density is 200 / 10cm, and the fabric structure is plain weave;

[0081] (1.3) Pre-oxidize and carbonize the nanofiber yarn fabric to obtain the carbon nanofiber yarn fabric; the pre-oxidation is carried out in air atmosphere, the pre-oxidation heating ra...

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Abstract

The invention relates to a flexible strain transducer based on carbon nanofiber yarn woven fabric and a preparation method thereof. The preparation method includes the following steps: uniformly spreading a polymer solution or a liquid polymer, and drying the polymer solution or the liquid polymer to prepare base film; connecting the carbon nanofiber yarn woven fabric with extraction electrodes, infiltrating the carbon nanofiber yarn woven fabric into the polymer solution or the liquid polymer, placing the carbon nanofiber yarn woven fabric on the base film, and performing drying treatment; applying the polymer solution or the liquid polymer to the surface of the carbon nanofiber yarn fabric once, and preparing the flexible strain transducer based on the carbon nanofiber yarn woven fabricthrough drying. Final products include the carbon nanofiber yarn woven fabric, two extraction electrodes communicating with the carbon nanofiber yarn woven fabric, and polymer film covering the upperand lower surface of the carbon nanofiber yarn woven fabric. A sensitivity coefficient of is 30-200 when cyclic stretch is performed at elongation ranging from 0 to 5-12%; and a linear correlation coefficient is more than or equal to 0.995 when the elongation is 9% or below when stretch is performed. The preparation method is simple in a process, and low in cost.

Description

technical field [0001] The invention belongs to the field of strain sensor preparation, and relates to a flexible strain sensor based on carbon nanofiber yarn fabric and a preparation method thereof. Background technique [0002] The strain sensor is a sensor based on measuring the strain generated by the force deformation of the object. The resistance strain gauge is the most commonly used sensing element. It is a sensing element that can convert the change of strain on a mechanical component into a change of resistance. Traditional strain sensors are mostly made of metal and semiconductor. It is used under the condition of small strain, and has high rigidity, is not easy to bend, and has low sensitivity. With the development of society, the field of wearable electronic products, such as human motion detection and medical equipment, has higher requirements for strain sensors - high flexibility, high strain, high sensitivity and high stability, so the development of flexibl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B7/16D03D15/00D03D13/00D06C7/04D03D15/275D03D15/33
CPCG01B7/16D03D13/00D03D15/00D06C7/04D10B2321/10
Inventor 闫涛潘志娟
Owner NANTONG TEXTILE & SILK IND TECH RES INST
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