Flexible fabric-based strain sensor and preparation method thereof

A strain sensor and flexible fabric technology, applied in the sensor field, can solve the problems of small sensing range, low sensitivity, wide strain, poor bonding force of conductive material elastic fabric, etc., to achieve the effect of enhancing adhesion and increasing contact area.

Active Publication Date: 2021-07-23
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the fabric strain sensor prepared by the current method, the bonding force between the conductive substance (graphene, carbon nanotube, etc.) and the elastic fabric is poor, resulting in problems such as small sensing range and poor sensitivity.
[0007] In order to solve at least one of the above-mentioned problems, the present invention proposes a method for fabricating a flexible fabric-based strain sensor by using alternate intercalation interlocking based on the layered impregnation process of dynamic bonding and double synergy, which solves the problem of the conductive material and the substrate in the sensor. The problem of bonding firmness, while solving the problems of low sensitivity and wide strain of the existing strain sensor, and improving the ability of the strain sensor as a wearable device

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Flexible fabric-based strain sensor and preparation method thereof
  • Flexible fabric-based strain sensor and preparation method thereof
  • Flexible fabric-based strain sensor and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] A method for fabricating flexible fabric-based strain sensors, such as figure 2 , including the following steps:

[0067] (1) Dip the polyester ammonia fabric in a solution containing sodium hydroxide (2g / L), take it out after dipping at a constant temperature of 85°C for 45 minutes, wash, dry and weigh for subsequent use; obtain the pretreated polyester ammonia fabric;

[0068] (2) Immerse the pretreated polyester ammonia fabric obtained in step (1) in a mixed solution containing dopamine hydrochloride (2 mg / mL) and tris buffer (1 M), the pH of the solution is 8.5; then at room temperature (25° C. ) under magnetic stirring (80rpm) for 24h; washing and drying to obtain a polydopamine-modified polyester / ammonia fabric;

[0069] (3) Immerse the polydopamine-modified polyester / ammonia fabric obtained in step (2) in graphene oxide dispersion (30 mM), the immersion temperature is 65°C, the immersion time is 30min, and then dried at 60°C for 30min; then the drying The resu...

Embodiment 2

[0087] A method for preparing a flexible fabric-based strain sensor, comprising the steps of:

[0088] (1) dipping the bromine fabric in a solution containing sodium hydroxide (2g / L), taking out after dipping at a constant temperature of 45min at 85°C, washing, drying, and weighing for subsequent use; obtain the pretreated bromine fabric;

[0089] (2) Immerse the pretreated bromine fabric obtained in step (1) in a mixed solution containing dopamine hydrochloride (2 mg / mL) and tris buffer (1 M), the pH of the solution is 8.5; then at room temperature (25° C. ) under magnetic stirring (80rpm) for 24h; washing and drying to obtain polydopamine-modified bromine fabric;

[0090] (3) immersing the polydopamine-modified nylon fabric obtained in step (2) in a dispersion solution containing carboxylated carbon nanotubes (30 mM) at room temperature for 30 minutes, and then drying at 60° C. for 30 minutes; obtaining an inner layer coated with Nylon fabric with conductive structure (carb...

Embodiment 3

[0097] Adjust the concentration of graphene oxide dispersion in Example 1 to be 10, 20, and 40 mM, omit step (4), and other are consistent with Example 1 to obtain a polyester ammonia fabric coated with reduced graphene oxide nanosheets.

[0098] The polyester ammonia fabric coated with reduced graphene oxide nanosheets will be obtained and tested for performance, and the test results are as follows:

[0099] The test result of table 5 embodiment 3

[0100]

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Abstract

The invention discloses a flexible fabric-based strain sensor and a preparation method thereof, and belongs to the technical field of sensors. The preparation method comprises the following steps of (1) pretreating an elastic fabric; (2) modifying the pretreated elastic fabric by using dopamine or a derivative thereof; (3) dipping the elastic fabric modified by dopamine or the derivative thereof in a dispersion liquid of graphene or the derivative thereof, drying, reducing, washing and drying; and (4) dipping the elastic fabric obtained in the step (3) in a mixed dispersion liquid of silver nitrate and carbon nanotubes or derivatives thereof, drying, reducing, washing, and drying to obtain the flexible fabric-based strain sensor. Due to the addition of dopamine or the derivative thereof, the problems that a carbon material is poor in dispersity and easy to agglomerate are solved, the bonding firmness problem of a conductive material and a matrix in the sensor is solved, and meanwhile the problems of low sensitivity, wide strain and the like of an existing flexible strain sensor are solved.

Description

technical field [0001] The invention relates to a flexible fabric-based strain sensor and a preparation method thereof, belonging to the technical field of sensors. Background technique [0002] As the core components of wearable electronic devices, the development of strain sensors has attracted more and more attention, and has a wide range of applications in wearable devices, intelligent health monitoring, flexible robots, energy storage and other fields. In recent years, flexible sensors based on elastic fabrics have attracted more and more attention due to their softness, breathability, low cost, and other advantages. Fabric-based flexible sensors can be integrated with clothing and have great application prospects. [0003] At present, there are related reports that carbon nanomaterials (carbon nanotubes, graphene and carbon black, etc.) and metal nanomaterials (metal nanowires and metal nanoparticles) have been introduced into fabric substrates to prepare flexible sen...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M13/368D06M11/74D06M11/83D06M11/38G01B7/16G01L1/18D06M101/38D06M101/34D06M101/32
CPCD06M13/368D06M11/74D06M11/83D06M11/38G01B7/18G01L1/18D06M2101/38D06M2101/34D06M2101/32
Inventor 丛洪莲蒋高明赵树强万爱兰缪旭红
Owner JIANGNAN UNIV
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