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Humidity sensor based on electrospinning nanofiber fabric

A humidity sensor and nanofiber technology, applied in the direction of electrochemical variables of materials, etc., can solve the problem of no contribution to sensor sensitivity and stability, and achieve the effects of low cost, high sensitivity and guaranteed stability.

Active Publication Date: 2019-08-16
NANTONG TEXTILE & SILK IND TECH RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since most of the base electrode materials currently use conductive substrates such as gold interdigitated electrodes and metal electrodes, the sensitivity of the entire humidity sensitive resistor only depends on the humidity sensitive resistor type material, and the substrate has little contribution to the sensitivity and stability of the sensor.

Method used

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  • Humidity sensor based on electrospinning nanofiber fabric
  • Humidity sensor based on electrospinning nanofiber fabric
  • Humidity sensor based on electrospinning nanofiber fabric

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Polyamide 6 / carbon nanotube nanofiber yarn was prepared by multi-needle water-bath electrospinning, in which the content of carbon nanotubes (single-walled carbon nanotubes, diameter 1-2nm, length 5-30μm) was 1%, and the yarn The linear density is 17.6tex, and then the plain weave nanofiber fabric is woven with a C / 401 rapier loom (Tianjin Longda Co., Ltd.). The weaving parameters are: the warp density of the upper machine is 450 pieces / 10cm, the weft density of the upper machine is 250 pieces / 10cm, the width is 24cm, the reed number is 15, and the number of penetrations is 3.

[0034] Cut out a rectangular nanofiber fabric with a length of 3 cm and a width of 1 cm, and use magnetron sputtering to coat it. The material is gold and the thickness is 200 nm. Then Fe with a mass ratio of 8:2 2 o 3 Mix the powder with ZnO as a humidity sensitive material to form a film with a thickness of 3 mm on the gold-plated nanofiber fabric to form a nanofiber fabric A1 with a humidit...

Embodiment 2

[0037] Polyamide 6 / carbon nanotube nanofiber yarn was prepared by multi-needle water-bath electrospinning, in which the content of carbon nanotubes (single-walled carbon nanotubes, diameter 1-2nm, length 5-30μm) was 1%, and the yarn The linear density is 17.6tex, and then the plain weave nanofiber fabric is woven with a C / 401 rapier loom (Tianjin Longda Co., Ltd.). The weaving parameters are: the warp density of the upper machine is 450 pieces / 10cm, the weft density of the upper machine is 250 pieces / 10cm, the width is 24cm, the reed number is 15, and the number of penetrations is 3.

[0038] Cut out a rectangular nanofiber fabric with a length of 3 cm and a width of 1 cm, and use magnetron sputtering to coat it. The material is gold and the thickness is 200 nm. Then TiO with a mass ratio of 5:5 2 Mix the powder with ZnO as the humidity sensitive material layer 101 to form a film with a thickness of 3 mm on the gold-plated nanofiber fabric to form the nanofiber fabric A1 with...

Embodiment 3

[0041] Polyamide 6 / carbon nanotube nanofiber yarn was prepared by multi-needle water-bath electrospinning, in which the content of carbon nanotubes (single-wall carbon nanotubes, diameter 1-2nm, length 5-30μm) was 0.5%, and the yarn The linear density is 17.6tex, and then the plain weave nanofiber fabric is woven with a C / 401 rapier loom (Tianjin Longda Co., Ltd.). The weaving parameters are: the warp density of the upper machine is 450 pieces / 10cm, the weft density of the upper machine is 250 pieces / 10cm, the width is 24cm, the reed number is 15, and the number of penetrations is 3.

[0042] Cut out a rectangular nanofiber fabric with a length of 3 cm and a width of 1 cm, and use magnetron sputtering to coat it. The material is gold and the thickness is 200 nm. Then Fe with a mass ratio of 8:2 2 o 3 Mix the powder with ZnO as the humidity sensitive material layer 101 to form a film with a thickness of 3 mm on the gold-plated nanofiber fabric to form the nanofiber fabric A1 ...

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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Abstract

The invention relates to the field of humidity sensing technologies and discloses a humidity sensor based on an electrospinning nanofiber fabric. The humidity sensor comprises a nanofiber fabric A, wherein the nanofiber fabric A is composed of a nanofiber fabric B, metal platings and humidity-sensitive material layers; the metal platings are arranged on the upper surface and the lower surface of the nanofiber fabric B respectively; and the surfaces of the two metal platings are plated with the humidity-sensitive material layers respectively. According to the humidity sensor based on the electrospinning nanofiber fabric, the nanofiber fabric is used as a conductive substrate which replaces original conductive substrates formed by a gold interdigital electrode, a metal electrode and the like, and cost is low; moreover, the humidity sensor itself has humidity sensitivity, the effect of a humidity-sensitive material is enhanced, and the whole humidity sensor is high in sensitivity and fastin response; and meanwhile, since electrodes are located at the two sides of the nanofiber fabric, the whole nanofiber fabric can be fully utilized, and the stability of the sensor is guaranteed.

Description

technical field [0001] The invention relates to the technical field of humidity sensing, in particular to a humidity sensor based on electrospun nanofiber fabrics. Background technique [0002] Humidity is a physical quantity that indicates the degree of dryness of the atmosphere. It has a great impact on people's daily production and life. The survival of human beings and other organisms needs to be in a certain humidity environment; textiles, papermaking, glass forming, electronic components, precision instruments and other production processes Humidity is also required to be strictly controlled. For the monitoring of humidity, the core device is the humidity sensor. At present, the humidity sensor of the humidity sensor mainly has two types: resistive and capacitive. The main principle is that when water molecules adsorb to the surface of the material, their dielectric constant or impedance changes. Compared with capacitive humidity sensors, resistive humidity sensors h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/30
CPCG01N27/30
Inventor 田龙潘志娟林童
Owner NANTONG TEXTILE & SILK IND TECH RES INST
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