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MXene-based flexible polyurethane fiber membrane strain sensor

A technology of strain sensor and polyurethane fiber, which is applied in fiber processing, devices for coating liquid on the surface, textiles and papermaking, etc., can solve the problems of mutual restriction between strain sensitivity and strain sensing range, complex preparation process of flexible strain sensor, etc., to achieve Effects of increased sensitivity and strain sensing range, high sensitivity, and low detection limit

Active Publication Date: 2019-04-05
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to overcome the problems of complex preparation process of the current flexible strain sensor, mutual restriction of strain sensitivity and strain sensing range, etc., and provide a method for preparing a high-performance flexible strain sensor

Method used

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  • MXene-based flexible polyurethane fiber membrane strain sensor
  • MXene-based flexible polyurethane fiber membrane strain sensor
  • MXene-based flexible polyurethane fiber membrane strain sensor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] (1) Preparation of MXene dispersion: Add 1.0 g of lithium fluoride (LiF) to 10 mL of hydrochloric acid with a concentration of 9 mol / L, stir for 5 min, and mix 1.0 g of Ti with a particle size of 400 mesh 3 AlC 2 The powder was added slowly, and etched at 35°C for 24h. The obtained product was centrifugally washed with deionized water at 3500 rpm until the pH was greater than 6, and the product obtained by the above centrifugal filtration was vacuum-filtered to obtain Ti 3 C 2 powder. Take 0.1g Ti 3 C 2 powder, added to 50.0ml of ethanol solution with a mass fraction of 50%, ultrasonicated in an ice-water bath for 2 hours under a nitrogen atmosphere, and the obtained solution contained Ti 3 C 2 Sheet 2mg / mL MXene dispersion (i.e. Ti 3 C 2 Dispersions).

[0044] (2) Preparation of TPU spinning solution: Add 5.9g of BASF 1180A polyurethane elastomer and 1.5g of BASF 1185A polyurethane elastomer to 40ml of DMF / THF mixed solution with a volume ratio of 1:1, stir fo...

Embodiment 2

[0049] (1) Preparation of MXene dispersion: Add 1.0 g of LiF to 10 mL of hydrochloric acid with a concentration of 9 mol / L, stir for 5 min, and mix 1.0 g of Ti with a particle size of 400 mesh 3 AlC 2 The powder was added slowly, and etched at 35°C for 24h. The obtained product was centrifugally washed with deionized water at 3500 rpm until the pH was greater than 6, and the product obtained by the above centrifugal filtration was vacuum-filtered to obtain Ti 3 C 2 powder. Take 0.05g Ti 3 C 2 powder, added to 50.0mL of 50% ethanol solution with a mass fraction of 3 C 2 Sheet 1mg / mL MXene dispersion.

[0050] (2) Preparation of TPU spinning solution: 3.7g of BASF 1185A polyurethane elastomer was added to 40ml of DMF / THF mixed solution with a volume ratio of 1:1, stirred by the rotor for 6h, and after the TPU elastomer was completely dissolved, a uniform TPU spinning solution. The mass fraction of 1185A in the solution was 10%.

[0051] (3) Preparation of TPU fiber mem...

Embodiment 3

[0055] (1) Preparation of MXene dispersion: Add 1.0 g of LiF to 10 mL of hydrochloric acid with a concentration of 9 mol / L, stir for 5 min, and mix 1.0 g of Ti with a particle size of 400 mesh 3 AlC 2 The powder was added slowly, and etched at 35°C for 24h. The obtained product was centrifugally washed with deionized water at 3500 rpm until the pH was greater than 6, and the product obtained by the above centrifugal filtration was vacuum-filtered to obtain Ti 3 C 2 powder. Take 0.15g Ti 3 C 2 powder, added to 50.0mL of 50% ethanol solution with a mass fraction of 3 C 2 Sheet 3mg / mL MXene dispersion.

[0056] (2) Preparation of TPU spinning solution: Add 4.8g of BASF 1180A polyurethane elastomer and 3.0g of BASF 1185A polyurethane elastomer to 40mL of DMF / THF mixed solution with a volume ratio of 1:1, stir for 6h through the rotor, and wait for the TPU to become elastic After the body is completely dissolved, a uniform TPU spinning solution is obtained. The mass fracti...

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Abstract

The invention relates to a MXene-based flexible polyurethane fiber membrane strain sensor. The sensor is prepared from a flexible substrate and a conductive layer; the flexible substrate is TPU flexible fiber film, the thickness of the fiber film is 100-300 micrometer; the conductive layer is an Mxene conductive layer wrapping the surface of the flexible substrate, the thickness of the conductivelayer is 20-50 micrometer; and the two ends of a thin film are connected with wires. Accordingly, the strain sensitivity of the sensor is improved, and the strain sensing range of the sensor is widened.

Description

technical field [0001] The invention relates to the field of flexible strain sensors, in particular to a flexible polyurethane fiber membrane strain sensor based on MXene material, and belongs to the technical field of flexible material preparation and application. Background technique [0002] In recent years, with the development of flexible electronic science and artificial intelligence technology, flexible strain sensing devices have gradually become a major research hotspot. Among them, flexible strain sensors are widely used in aerospace, military industry, transportation, motion sensing, construction, medical health and other fields, and their working principles mainly include: piezoelectric, capacitive and piezoresistive. At present, the mainstream method of the traditional tension sensor is to convert the deformation of the sensor into the change of resistance value during the stretching process. One of the methods is to fill the polymer with conductive substances,...

Claims

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Application Information

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IPC IPC(8): D04H1/728D01D5/00B05D1/00B05D3/04B05D5/12B05D7/24
CPCD01D5/003D01D5/0076D01D5/0092D04H1/728B05D1/00B05D3/0493B05D5/12B05D7/24D10B2509/00
Inventor 苑文静杨凯杨进争李新新
Owner HEBEI UNIV OF TECH
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