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Piezoresistive sensing fabric with unidirectional moisture transfer function and preparation method thereof

A unidirectional moisture-wicking and conductive fabric technology, which is applied in plant fibers, textiles, papermaking, and material resistance, can solve problems such as poor air permeability and poor wearing comfort, and achieve excellent electrical conductivity, high humidity resistance and high precision , the effect of excellent sensing performance

Active Publication Date: 2022-02-18
WUHAN TEXTILE UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the polymer composite microsphere coating has a dense film structure, which has the disadvantages of poor air permeability and poor wearing comfort.

Method used

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  • Piezoresistive sensing fabric with unidirectional moisture transfer function and preparation method thereof
  • Piezoresistive sensing fabric with unidirectional moisture transfer function and preparation method thereof
  • Piezoresistive sensing fabric with unidirectional moisture transfer function and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0036] The invention provides a preparation method of a piezoresistive sensing fabric with unidirectional moisture-conducting effect, comprising the following steps:

[0037] S1, immerse the pretreated fabric base cloth in a polymer conductive solution, ultrasonically treat it for 1-30 minutes, to obtain a conductive fabric, and then roll the conductive fabric for 3-5 times, and then heat the conductive fabric at 50-120 ° C. Drying for 5-60 minutes, so that the upper and lower surfaces and the inside of the fabric base cloth are uniformly deposited with a loaded polymer conductive layer to obtain a first conductive fabric;

[0038] S2, immersing the first conductive fabric prepared in step S1 in a dispersion of a hydrophobic metal oxide, and ultrasonically treating it for 0.5 to 15 minutes to obtain a hydrophobic conductive fabric; then washing the hydrophobic conductive fabric, and then placing drying at 50-120° C. for 5-60 minutes, so that a hydrophobic metal oxide layer is ...

Embodiment 1

[0049] A preparation method of a piezoresistive sensing fabric with unidirectional moisture-conducting effect, comprising the following steps:

[0050] S1, the cotton fabric base cloth is placed in water, sodium hydroxide solution, and ethanol in turn, ultrasonically cleaned for 5 minutes, and then naturally dried, and the pretreated cotton base cloth is immersed in a polypyrrole polymer conductive with a concentration of 2.0wt%. In the solution, ultrasonically treated for 10 min to obtain a conductive fabric, and then the conductive fabric was subjected to rolling treatment, repeated 3 times, and then dried at 60 ° C for 15 min, so that the upper and lower surfaces and the interior of the fabric base cloth were uniformly deposited and loaded with high load. Molecular conductive layer to obtain a first conductive fabric;

[0051] S2, the first conductive fabric prepared in step S1 is immersed in a dispersion of hydrophobic titanium dioxide with a concentration of 5 mg / mL, and ...

Embodiment 2-4

[0085] The difference from Example 1 is that the settings of the implementation parameters in the preparation steps are different, and other steps are the same as those in Example 1, and are not repeated here.

[0086] Table 1 shows the parameter settings in Examples 1 to 4

[0087]

[0088] Combined with Table 1 for analysis:

[0089] 1) In the present invention, the influence of the concentration of the polymer conductive solution on the sensing performance of the piezoresistive sensing fabric is: as the concentration of the conductive solution increases, the resistance of the piezoresistive sensing fabric decreases in a smaller range, and the sensing Sensitivity slightly improved. Considering the cost factor, good sensing performance can be achieved by selecting a moderate concentration of conductive solution.

[0090] 2) The effect of the concentration and type of the dispersion of the hydrophobic metal oxide on the sensing performance of the piezoresistive sensing fa...

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Abstract

The invention provides a piezoresistive sensing fabric with unidirectional moisture guiding function and a preparation method thereof. The piezoresistive sensing fabric uses the fabric base fabric as the base material, and through the structure design of the asymmetric hydrophilic / hydrophobic functional surface on both sides, the first hydrophobic metal oxide layer, the first polymer The conductive layer, the fabric base fabric, the second polymer conductive layer, the second hydrophobic metal oxide layer and the hydrophilic fiber layer are combined to construct a piezoresistive sensing fabric with unidirectional moisture conductivity, which has excellent electrical conductivity. Sex, moisture conduction, anti-high humidity interference performance and high-precision sensing function. The preparation method is simple in process and strong in implementability, and is suitable for use in the field of piezoresistive sensing material preparation; and the method can be prepared in air, with stable process and good repeatability; it can also realize large-scale production and preparation, and has the advantages of Good industrialization potential.

Description

technical field [0001] The invention relates to the technical field of preparation of conductive fabrics, in particular to a piezoresistive sensing fabric with unidirectional moisture-conducting effect and a preparation method thereof. Background technique [0002] In recent years, wearable electronic skin has made great progress in the application of human motion and health detection, artificial intelligence, electronic skin, etc. According to the sensing mechanism, it can be divided into capacitive, piezoresistive, piezoelectric, and triboelectric. Recently, a fabric-based piezoresistive sensor that combines the advantages of high sensitivity, simple preparation process, easy integration, good air permeability, good flexibility, good mechanical properties, large area, knitting, and wearing comfort has been obtained. It has attracted much attention from the majority of researchers. The fabric-based piezoresistive sensor is composed of a sensing unit and an electrode, wher...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M15/37D06M11/38D06M11/46D06M15/03G01N27/04D06M101/06
Inventor 杨丽燕王栋马俊李沐芳
Owner WUHAN TEXTILE UNIV
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