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Electrospinning-based flexible tensile strain sensor with spiral wound structure

A technology of tensile strain and helical winding, which is applied in the direction of using electric/magnetic devices to transmit sensing components, textiles and papermaking, fiber chemical characteristics, etc., can solve the problems of inability to provide electrical signal response, decline in electrical conductivity, etc., and achieve strain tolerance Wide range, high tensile recovery, and the effect of ensuring electrical conductivity

Active Publication Date: 2018-01-12
QINGDAO AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The most common product of traditional electrospinning is a two-dimensional non-woven fiber structure. This technology can be used to prepare micro-nano fiber membrane materials with certain electrical conductivity. However, although most of these materials can be bent and have certain flexibility, however, Often it cannot be stretched in a large range, and in the case of a small range of stretching, its electrical conductivity will drop sharply, and it cannot provide a good electrical signal response, which limits its application in flexible wearable devices to some extent. further application of

Method used

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  • Electrospinning-based flexible tensile strain sensor with spiral wound structure
  • Electrospinning-based flexible tensile strain sensor with spiral wound structure
  • Electrospinning-based flexible tensile strain sensor with spiral wound structure

Examples

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Embodiment 1

[0034] A method for preparing a flexible and stretchable strain sensor based on electrospinning helical winding structure, comprising the following steps:

[0035] (1) Preparation of conductive nanofiber film by electrospinning: mix 1.2g polyurethane (PU), 3.9g N-N dimethylformamide and 3.9g acetone, heat and stir at 40°C until uniform and transparent to obtain a uniform spinning precursor solution, and spin The silk precursor solution is injected into the liquid storage mechanism of the electrospinning device, the spinning voltage is 13 kV, the spinning distance is 8 cm, the air humidity is 45%, and the spinning time is 10 minutes, that is, the insulation is obtained on the collector electrode of the electrospinning device. Nanofiber membrane, the obtained insulating nanofiber membrane is immersed in a graphene solution (solvent is DMF) after in-situ wetting and loading graphene, and then the sample is naturally dried to obtain a conductive nanofiber membrane;

[0036] (2) Pr...

Embodiment 2

[0040] A method for preparing a flexible and stretchable strain sensor based on electrospinning helical winding structure, comprising the following steps:

[0041] (1) Preparation of conductive nanofiber film by electrospinning: mix 1.2g polyurethane (PU), 3.9g N-N dimethylformamide and 3.9g acetone, heat and stir at 40°C until uniform and transparent to obtain a uniform spinning precursor solution, and spin The silk precursor solution is injected into the liquid storage mechanism of the electrospinning device, the spinning voltage is 13 kV, the spinning distance is 8 cm, the air humidity is 45%, and the spinning time is 10 minutes, that is, the insulation is obtained on the collector electrode of the electrospinning device. Nanofiber membrane; Dissolve 2.542g of sulfosalicylic acid in 50ml of deionized water, then add 1.8626g of aniline into it, and stir it thoroughly as solution A, dissolve 4.564g of ammonium persulfate in 50ml of deionized water, and stir it fully As soluti...

Embodiment 3

[0047] A method for preparing a flexible and stretchable strain sensor based on electrospinning helical winding structure, comprising the following steps:

[0048] (1) Preparation of conductive nanofiber film by electrospinning: mix 1.2g polyurethane (PU), 3.9g N-N dimethylformamide and 3.9g acetone, heat and stir at 40°C until uniform and transparent to obtain a uniform spinning precursor solution, and spin The silk precursor solution is injected into the liquid storage mechanism of the electrospinning device, the spinning voltage is 13 kV, the spinning distance is 8 cm, the air humidity is 45%, and the spinning time is 10 minutes, that is, the insulation is obtained on the collector electrode of the electrospinning device. Nanofiber membrane; mix 0.3ml hydrochloric acid, 1.2ml EDOT, and 60ml deionized water, and record it as solution ①; mix 2.16g ammonium persulfate and 30ml deionized water, and record it as solution ②. After stirring with a magnetic stirrer at room temperat...

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Abstract

The invention discloses an electrospinning-based flexible tensile strain sensor with a spiral wound structure, and a preparation method of the electrospinning-based flexible tensile strain sensor. A sensitive resistor of the product is made of a bifilar helix prepared through twice twisting of a conductive nanofiber membrane prepared through the combination with an electrospinning method. The sensor has relatively high conductivity, still has a conductive property at relatively large tension and large-size tension, has advantages of relatively good toughness, high tensile recovery property, good tensile stability, wide strain withstanding range, simple preparation method and low production cost, and is suitable for large-scale production.

Description

technical field [0001] The invention belongs to the field of flexible electronic devices, in particular to a flexible and stretchable strain sensor with a helical winding structure based on electrospinning and a preparation method thereof. Background technique [0002] In recent years, since flexible wearable electronic devices can be integrated into clothing and human skin to obtain various information such as body movements, body temperature changes, psychological changes, and health conditions anytime and anywhere, that is, to work flexibly in non-planar working environments and Promote the integration of information and people. Therefore, it has received extensive attention in the fields of natural disaster early warning, artificial electronic skin, solar cells, smart displays, wearable personal health monitoring equipment, robots with artificial intelligence, and embedded medical devices. As the core component of flexible wearable devices, flexible sensors will affect t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/40D06M11/74D06M15/61D06M15/63D01D5/00D04H1/728G01D5/16D06M101/38
Inventor 于桂凤潘维王进平孙晓波姜永超李永平张志广李桂霞
Owner QINGDAO AGRI UNIV
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