Flexible stress sensor based on carbon nanotube and silver nanowire composite conductive film

A stress sensor, composite conductive technology, applied in instruments, measuring forces, measuring devices, etc., can solve problems such as poor adhesion, and achieve the effects of improving conductivity, responsiveness, and adhesion.

Active Publication Date: 2018-02-02
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned composite conductive films all belong to a kind of physical composite, and the adhesion between them is relatively poor.

Method used

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  • Flexible stress sensor based on carbon nanotube and silver nanowire composite conductive film
  • Flexible stress sensor based on carbon nanotube and silver nanowire composite conductive film

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0021] Step 1. Put 0.2g PVP and 0.012g CNTs into a grinding bowl for sufficient grinding. Pour the ground powder into a beaker containing 20 ml of ethylene glycol. Put it into an ultrasonic machine for ultrasonic dispersion for 12h-24h until the ultrasonic dispersion is uniform. Then dilute the ethylene glycol to 250ml, and then ultrasound for 12h-24h. Finally, the dispersed solution was allowed to stand still for 12 hours, and the precipitate-free solution with CNTs dispersed in the upper layer was taken.

[0022] Step 2. Weigh 0.108gAgNO 3 (Silver nitrate) and 0.1758g PVP are dissolved in 6ml of the upper sediment-free solution obtained in step 1, and continuously stirred to make it fully dissolved. In addition, weigh 0.02g of NaCl (sodium chloride) and dissolve it in 20ml of the upper layer solution obtained in step 1 without precipitation solution, and stir continuously to make it fully dissolved. Then measure 2ml of the above solution with NaCl dissolved, and the dissolve...

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Abstract

The invention discloses a flexible stress sensor based on a carbon nanotube and silver nanowire composite conductive film, which belongs to the technical field of flexible stress sensor. First, CNTs is dispersed in ethylene glycol, and AgNWs is synthesized in the dispersed solution. Then, the synthesized compound is transferred to a PDMS flexible substrate by means of spray coating to prepare a CNTs-AgNWs composite conductive film conductive electrode. Finally, a flexible stress sensor with high stability is obtained through packaging with a layer of PDMS flexible substrate. The compound of CNTs and AgNWs is chemically synthesized using the ethylene glycol dispersion of carbon nanotubes, which improves the bonding property of CNTs and AgNWs, and greatly improves the stability and responsiveness of the flexible stress sensor. The compounding of CNTs and AgNWs improves conductivity, saves energy and greatly widens the application of the flexible stress sensor in flexible electronics without changing the original flexibility, ductility and transparency.

Description

Technical field [0001] The invention belongs to the technical field of flexible stress sensors, relates to a preparation process of flexible stress sensors of CNTs (carbon nanotubes) and AgNWs (silver nanowires) composite conductive films, and specifically relates to the dispersion of carbon nanotubes in glycol solvents , The synthesis of silver nanowires in dispersed carbon nanotubes in ethylene glycol solution, the preparation of PDMS (polydimethylsiloxane) films, and the formation of composite conductive films of CNTs and AgNWs on the surface of PDMS films and the packaging of devices. Background technique [0002] With the development of technology, flexible devices can be widely used in various fields with their excellent performance. For example, flexible touch screens, flexible OLEDs (organic light emitting diodes), flexible solar cells, flexible semiconductor devices, and wearable electronic skins applied to robots. In particular, wearable electronic skins require better...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L1/20
CPCG01L1/20
Inventor 魏雄邦庞韩英杨俊杰张文豪吕国栋吴双红
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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