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Capacitive flexible pressure sensor based on composite material dielectric layer and preparation method of capacitive flexible pressure sensor

A pressure sensor and composite material technology, applied in the field of sensors, can solve the problems such as the sensitivity and stability of the sensor need to be further improved, and achieve the effects of being beneficial to application promotion, improving sensitivity, and improving rate of change

Active Publication Date: 2016-10-12
XIAMEN ZHONGKE WISDOW MEDICAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this technical solution is that the change rate of the dielectric constant of the dielectric layer needs to be further improved, and the sensitivity and stability of the sensor need to be further improved.

Method used

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  • Capacitive flexible pressure sensor based on composite material dielectric layer and preparation method of capacitive flexible pressure sensor
  • Capacitive flexible pressure sensor based on composite material dielectric layer and preparation method of capacitive flexible pressure sensor
  • Capacitive flexible pressure sensor based on composite material dielectric layer and preparation method of capacitive flexible pressure sensor

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Experimental program
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Effect test

Embodiment 1

[0064] (1) Preparation of flexible substrate

[0065] Commercially available polydimethylsiloxane (PDMS) monomer and curing agent (Dow Corning, SYLGARD 184, the United States) were thoroughly mixed according to a mass ratio of 10:1, and OSP-100 Meyer rods (OSP-100 , Shijiazhuang Aospa Machinery Technology Co., Ltd.) on the surface of commercially available inkjet printing paper (Canon, LU-101 professional suede photo paper, Japan), and then put it in a vacuum oven for 5 minutes at room temperature to remove the coating. Bubbles in the layer, cured at 70°C for 2 hours, and peeled off from the surface of the photo paper to obtain a flexible substrate with a thickness of 100 μm.

[0066] (2) Preparation of conductive layer and electrodes

[0067] Using screen printing (screen printing machine: OS-500FB, China Outlet Printing Machinery Industry Co., Ltd.), print nano-silver conductive ink (AP02, Beijing Beiyin Zhongyuan Technology Co., Ltd.) on the surface of the flexible substra...

Embodiment 2

[0077] (1) Preparation of flexible substrate

[0078] The commercially available dimethylsiloxane (PDMS) monomer and curing agent (Dow Corning, SYLGARD 184, the United States) were thoroughly mixed at a mass ratio of 10:1, and OSP-1.5 Meyer rods (OSP-1.5, Shijiazhuang Austrian Machinery Technology Co., Ltd.) on the surface of commercially available inkjet printing photo paper (Canon, LU-101 professional suede photo paper, Japan), and then put it in a vacuum oven for 5 minutes at room temperature to remove the coating medium air bubbles, cured at 70°C for 2 hours, and peeled off from the surface of the photo paper to obtain a flexible substrate with a thickness of 1 μm.

[0079] (2) Preparation of conductive layer and electrodes

[0080] On the surface of the flexible substrate, the carbon nanotube conductive layer (TNWPM, Chengdu Organic Chemistry Co., Ltd., Chinese Academy of Sciences) was prepared by coating the OSP-1.5 Meyer rod (OSP-1.5, Shijiazhuang OSP Machinery Technol...

Embodiment 3

[0089] Other is exactly the same as embodiment 1, and difference is:

[0090] (1) Replace "polydimethylsiloxane (PDMS) / silver nanoparticle composite material" with "polystyrene (PS), epoxy resin, polyvinylidene fluoride (PVDF), polyester (PET), Polycarbonate (PC), polyphenylene sulfide (PPS), polypropylene (PP), polyimide (PI), polyethylene 2,6-naphthalene (PEN), polyurethane, polyurethane acrylate, Organic glass, silicone rubber or UV curable glue / copper, gold, aluminum, lead, zinc or tin nanoparticles (the optimal range of each doping component is 25wt.%~55wt.%) composite material".

[0091] (2) The thickness of the dielectric layer is 1 μm.

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Abstract

The invention relates to a capacitive flexible pressure sensor based on a composite material dielectric layer and a preparation method of the capacitive flexible pressure sensor and belongs to the technical field of sensors. The flexible pressure sensor includes an upper flexible substrate and a lower flexible substrate, and an upper conducting layer attached to the inner surface of the upper flexible substrate and a lower conducting layer attached to the inner surface of the lower flexible substrate. The composite material dielectric layer is arranged between the upper conducting layer and the lower conducting layer. Compared with the prior art, doping is performed on dielectric layer polymer resin of the capacitive flexible pressure sensor. The doping material includes metal conductors, ferroelectric ceramics, carbon material and organic semiconductors. By adopting the above doping material, the flexibility of the capacitive flexible pressure sensor is improved effectively and the application and promotion of the sensor are facilitated.

Description

technical field [0001] The invention relates to a capacitive flexible pressure sensor and a preparation method thereof, in particular to a capacitive flexible pressure sensor based on a composite material dielectric layer and a preparation method thereof, belonging to the technical field of sensors. Background technique [0002] In the 21st century, the problem of global population aging has intensified, and the cost of healthcare systems has continued to rise. Researchers from various countries are actively looking for new solutions in order to improve disease prevention and intervention. [0003] In recent years, wearable health and medical devices based on capacitive flexible pressure sensors have emerged as the times require, bringing new hope to people and gradually penetrating into various fields such as electronic skin and intelligent robots. For example, a carpet with a pressure sensor can notify medical staff and family members in time to tell the elderly and childr...

Claims

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Application Information

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IPC IPC(8): G01L1/14
CPCG01L1/142
Inventor 莫黎昕李路海翟庆彬李正博王振国
Owner XIAMEN ZHONGKE WISDOW MEDICAL TECH CO LTD
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