Piezoresistive sensing fabric with one-way moisture conduction effect and preparation method thereof

A unidirectional moisture-conducting, conductive fabric technology, used in plant fibers, textiles and papermaking, fiber processing, etc., can solve problems such as poor wearing comfort and poor air permeability, and achieve high-humidity resistance performance, high precision, and excellent conductivity. , to ensure the effect of accuracy and stability

Active Publication Date: 2021-04-20
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 one-way moisture conduction effect and preparation method thereof
  • Piezoresistive sensing fabric with one-way moisture conduction effect and preparation method thereof
  • Piezoresistive sensing fabric with one-way moisture conduction effect and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0036] The invention provides a method for preparing a piezoresistive sensing fabric with unidirectional moisture transfer function, comprising the following steps:

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

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

Embodiment 1

[0049] A preparation method of a piezoresistive sensing fabric with unidirectional moisture transfer, comprising the steps of:

[0050] S1, put the cotton fabric base cloth in water, sodium hydroxide solution, and ethanol in sequence, ultrasonically clean it for 5 minutes, and then dry it naturally. solution, sonicated for 10 minutes 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 minutes, so that the upper and lower surfaces and interior of the fabric base cloth had a high uniform deposition load. Molecular conductive layer to obtain the first conductive fabric;

[0051] S2, immersing the first conductive fabric prepared in step S1 in a dispersion of hydrophobic titanium dioxide with a concentration of 5 mg / mL, and ultrasonically treating it for 1.5 min to obtain a hydrophobic conductive fabric; then washing the hydrophobic conductive fabric , and then dried at 60° C. for 15 min...

Embodiment 2-4

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

[0086] Table 1 is the parameter setting in embodiment 1 to 4

[0087]

[0088] Combined with Table 1 for analysis:

[0089] 1) In the present invention, the impact of the polymer conductive solution concentration on the piezoresistive sensing weaving sensing performance is: with the increase of the conductive solution concentration, the resistance of the piezoresistive sensing fabric decreases in a small range, and the sensing Sensitivity has been slightly increased. In view of the cost factor, good sensing performance can be achieved by selecting a moderate concentration of the conductive solution.

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

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Abstract

The invention provides a piezoresistive sensing fabric with a one-way moisture conduction effect and a preparation method thereof. The piezoresistive sensing fabric takes fabric base cloth as a base material, through the structural design of asymmetric hydrophilic / hydrophobic functional surfaces on two sides, a first hydrophobic metal oxide layer, a first polymer conductive layer, the fabric base cloth, a second polymer conductive layer, a second hydrophobic metal oxide layer and a hydrophilic fiber layer are sequentially compounded from top to bottom, the piezoresistive sensing fabric with the one-way moisture conduction effect is constructed, and the piezoresistive sensing fabric has excellent electrical conductivity, moisture conduction effect, high-humidity interference resistance and high-precision sensing function. The preparation method is simple in process, high in practicability and suitable for being applied to the field of piezoresistive sensing material preparation; the method can be used for preparation in the air, the process is stable, and the repeatability is good; and large-area production and preparation can be realized, and the method has good industrialization potential.

Description

technical field [0001] The invention relates to the technical field of conductive fabric preparation, in particular to a piezoresistive sensing fabric with unidirectional moisture guiding function and a preparation method thereof. Background technique [0002] In recent years, the application of wearable electronic skin in human motion and health detection, artificial intelligence, electronic skin, etc. has made great progress. According to the sensing mechanism, it can be divided into capacitive, piezoresistive, piezoelectric, and triboelectric. Recently, fabric-based piezoresistive sensors that combine the advantages of high sensitivity, simple preparation process, easy integration, good air permeability, good flexibility, excellent mechanical properties, large area, weavable, and comfortable wearing have been obtained. The majority of researchers are enthusiastic and have attracted much attention. The fabric-based piezoresistive sensor consists of a sensing unit and ele...

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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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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