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Preparation method of flexible sensor

A flexible sensor and flexible substrate technology, applied in the field of sensors, can solve the problems of high cost of nanomaterials, high manufacturing cost, and difficult optimization of process parameters, and achieve flexible and controllable shape, improved stability, and good combination

Active Publication Date: 2018-05-08
深圳感碳科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the above-mentioned types of processes, the cost of nanomaterials used is high, and the optimization of process parameters is difficult; the physical and chemical compatibility between nanomaterials and the substrate is not good, and the chemical and mechanical stability is not high; the manufacturing cost is high, and the substrate cannot be flexibly selected Material

Method used

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  • Preparation method of flexible sensor
  • Preparation method of flexible sensor
  • Preparation method of flexible sensor

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] figure 1 It is the preparation flowchart of the piezoresistive flexible sensor of this embodiment, and the specific steps are as follows:

[0052] First, 1.5 g of precursor solution, which is N,N'-dimethylacetamide solution of polyamic acid, was spin-coated on A4 paper 1 to form polyamic acid-A4 paper composite matrix 2.

[0053] Heat treatment was performed on the spin-coated polyamic acid-A4 paper composite substrate 2, specifically removing water at 100° C. for 0.5 h, and then removing solvent at 150° C. for 1.5 h. In order to prevent the A4 paper 1 from being curled by heat and cause uneven heating, the A4 paper 1 can be fixed with a heat-resistant adhesive tape. After heat treatment, polyamic acid is amidated into polyimide to form polyimide-A4 paper composite matrix 3 . figure 2 is the cross-sectional scanning electron microscope image of polyimide-A4 paper composite substrate 3, the part above the solid line a-a' in the figure is A4 paper 1, and the part betwe...

Embodiment 2

[0059] First, 1.5 g of precursor solution, which is N,N'-dimethylacetamide solution of polyamic acid, was scraped on A4 paper to form polyamic acid-A4 paper composite matrix.

[0060] Heat treatment is performed on the polyamic acid-A4 paper composite substrate after scraping coating, specifically removing water at 100° C. for 0.5 h, and then removing solvent at 150° C. for 1.5 h. In order to prevent A4 paper from being curled by heat and causing uneven heating, heat-resistant tape can be used to fix A4 paper. After heat treatment, the polyamic acid is amidated into polyimide to form a polyimide-A4 paper composite matrix.

[0061] Put the polyimide-A4 paper composite substrate in a laser cutting machine for laser scanning carbonization, the laser light source used is CO 2 Laser, the laser power is controlled at 1W, the laser scanning speed is 20mm / s, along the vertical direction, the laser is irradiated every 0.13mm, and the irradiated area roughly forms a U-shaped pattern ( ...

Embodiment 3

[0064] First, spin-coat 0.5g of precursor solution on A4 paper, which is N,N'-dimethylacetamide solution of polyamic acid. The spin-coating speed is 1000rpm (A4 paper can be completely soaked at this speed), The time is 1 min, and the same method is used to spin coat three times to form a polyamic acid-A4 paper composite matrix.

[0065] Heat treatment was performed on the spin-coated polyamic acid-A4 paper composite substrate, specifically removing water at 100° C. for 0.5 h, and then removing solvent at 150° C. for 1.5 h. In order to prevent the A4 paper from being curled by heating and causing uneven heating, it can be pressed with an appropriate weight after removing water. After heat treatment, the polyamic acid is amidated into polyimide to form a polyimide-A4 paper composite matrix.

[0066] Put the polyimide-A4 paper composite substrate in a laser cutting machine for laser dot carbonization. The laser light source used is carbon dioxide laser, the laser power is contr...

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Abstract

The invention relates to a preparation method of a flexible sensor, which comprises the following steps: modifying carbonated polymer on part of the surface of a flexible matrix to form a carbonated polymer layer; irradiating at least part of the carbonated polymer layer with laser to realize in-situ carbonization and form a sensing element; and electrically connecting at least two positions of the sensing element to form electrodes, and then, obtaining a flexible sensor. The method of the invention has the advantages of low cost, strong universality, flexible design, simple manufacture, automatic processing and good technological controllability. The flexible sensor prepared is multifunctional and highly sensitive.

Description

technical field [0001] The invention relates to the technical field of sensors, in particular to a preparation method of a flexible sensor. Background technique [0002] With the growing demand for flexible and soft electronic devices, wearable flexible sensors have important applications in the fields of personalized health monitoring, human motion detection, human-computer interaction, soft robotics, etc. Flexible sensor devices mainly include sensing elements and flexible substrates. Flexible substrates generally choose ductile plastics such as PET and rubber such as PDMS. In addition, environmentally friendly and low-cost matrix materials such as paper and fabrics have attracted widespread attention. [0003] At present, flexible sensing technology mainly uses materials such as carbon nanotubes, porous silicon, porous alumina, zinc oxide nanorods, graphite, and gold nanofilms through techniques such as drop coating, ink pen writing, pencil writing, inkjet printing, and...

Claims

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Application Information

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IPC IPC(8): G01D5/16G01D5/20G01D5/24A61B5/08
CPCA61B5/08A61B5/6819G01D5/16G01D5/20G01D5/24
Inventor 刘涛罗姜姜姚艳波段晓爽
Owner 深圳感碳科技有限公司
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