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Preparation method of flexible gas sensor for fabric

A gas sensor and sensor technology, used in instruments, scientific instruments, textiles and papermaking, etc., can solve the problems of inconvenient wearing, affecting the breathability and comfort of protective clothing, and achieve regular pore arrangement, easy regulation and detection. obvious effect

Pending Publication Date: 2021-10-26
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the gas sensor is mainly worn on the smart protective clothing through wearable devices, which is not only inconvenient to wear, but also affects the breathability and comfort of the protective clothing. Therefore, how to integrate the gas sensor while maintaining the original flexibility and breathability of the fabric When it comes to protective clothing, it is a technical problem that smart protective clothing needs to solve

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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  • Preparation method of flexible gas sensor for fabric
  • Preparation method of flexible gas sensor for fabric
  • Preparation method of flexible gas sensor for fabric

Examples

Experimental program
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Effect test

Embodiment 1

[0038] The method for preparing a flexible gas sensor for fabrics in this embodiment includes the following steps:

[0039] Step 1. Select an area on the fabric as the sensor processing area, and the fabric as the flexible substrate of the sensor;

[0040] Step 2. Weigh the alcohol-soluble phenolic resin and the block copolymer F127 according to the mass ratio of 2:1, and the alcohol-soluble phenolic resin and the block copolymer F127 as the solute. Proportionally weigh absolute ethanol, using absolute ethanol as a solvent; pour the weighed alcohol-soluble phenolic resin and block copolymer F127 into absolute ethanol for stirring, the stirring temperature is 40°C, and the stirring rate is 800 rpm, The stirring time is 4 hours, until the alcohol-soluble phenolic resin and the block copolymer F127 are completely fused, and the coating solution is prepared;

[0041] Step 3. Put the coating solution in a vacuum box for degassing treatment for 0.5h to remove the air bubbles in the...

Embodiment 2

[0045] In this embodiment, the ratio of raw materials for preparing the coating solution in step 2 is different from that in Example 1, and all the other steps are the same as in Example 1, specifically:

[0046] Weigh the alcohol-soluble phenolic resin and the block copolymer F127 according to the mass ratio of 1:1, and then weigh the absolute ethanol according to the mass ratio of the solute to the solvent of 1:4 to prepare the coating solution.

[0047] image 3 For the electron microscope picture of the porous carbon obtained in this example, the carbon dioxide laser ablated the coated area of ​​the fabric to form a regular porous structure with a pore size of 100-200 nm.

[0048] Figure 5 The sensor that obtains for this embodiment measures the continuous response graph of NO gas, wherein, R represents the resistance of sensor after changing in gas, R 0 Indicates the initial resistance; It can be seen from the figure that as the gas concentration increases, the respons...

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Abstract

The invention relates to a preparation method of a flexible gas sensor for a fabric. The preparation method comprises the following steps of 1, selecting an area on the fabric as a sensor processing area, 2, preparing a coating solution according to the mass ratio of alcohol-soluble phenolic resin to poloxamer being larger than 1: 2 and smaller than or equal to 2: 1, the mass ratio of the sum of the mass of the alcohol-soluble phenolic resin and the mass of the poloxamer to absolute ethyl alcohol being 1: 4, 3, placing the coating solution in a vacuum box for degassing treatment, spin-coating the sensor processing area of the fabric with the degassed coating solution, and placing the fabric spin-coated with the coating solution in a vacuum drying box for vacuum heating and drying, 4, ablating the area, spin-coated with the coating solution, of the dried fabric by using a carbon dioxide laser to obtain porous carbon, and respectively adhering electrode plates to two ends of the area where the porous carbon is located. The gas sensor is combined with the fabric, so that the flexibility and the air permeability of the fabric are kept, and the manufacturing cost of the intelligent protective clothing is reduced.

Description

technical field [0001] The invention belongs to the technical field of sensor preparation, in particular to a method for preparing a flexible gas sensor for fabrics. Background technique [0002] Traditional gas sensors mostly use rigid materials as substrates, and metal oxides as gas-sensing materials. With the rapid development of flexible device manufacturing technology, gas-sensitive materials can be coated on flexible substrates such as polyimide film (PI), polyethylene terephthalate film, etc. (PET), polyimide, to prepare flexible gas sensors. Flexible gas sensors are easier to integrate into multi-sensor arrays, electronic noses, smart textiles, industrial radio frequency tags and other systems than rigid sensors to meet the development trend of miniaturization, intelligence and multi-function of gas sensors. [0003] In some high-risk industrial environments, due to the toxic and harmful gases produced by leakage, they appear colorless and odorless at low concentra...

Claims

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Application Information

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IPC IPC(8): G01N27/12D06N3/00D06N3/04
CPCG01N27/126D06N3/04D06N3/0077
Inventor 杨丽姬华东郑广浩王宏丽
Owner HEBEI UNIV OF TECH
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