Elastomer film with multi-level microstructure and preparation method thereof, and flexible pressure sensor containing the same

A technology of pressure sensors and elastomers, applied in the direction of instruments, measuring force, measuring devices, etc., can solve problems such as difficult mass production, complex preparation process, narrow sensing range, etc., achieve stable response, great application potential, and high sensitivity high effect

Active Publication Date: 2022-05-06
TIANJIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the problems of low sensitivity, narrow sensing range, complex and unstable preparation process, and difficulty in large-scale mass production faced by the existing flexible pressure sensor, and provides an elastomer film with a multi-level microstructure and a preparation method thereof

Method used

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  • Elastomer film with multi-level microstructure and preparation method thereof, and flexible pressure sensor containing the same
  • Elastomer film with multi-level microstructure and preparation method thereof, and flexible pressure sensor containing the same
  • Elastomer film with multi-level microstructure and preparation method thereof, and flexible pressure sensor containing the same

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0037] A preparation method of an elastomer film with a multi-level microstructure is prepared by the following steps:

[0038] Step 1, processing and customizing the collection template of electrospinning;

[0039] Step 2. Change the receiving device in the electrospinning equipment from a drum to a collection template, and adjust the parameters of the electrospinning equipment;

[0040] Electrospinning is a special fiber manufacturing process. The polymer solution or melt is jet-spun in a strong electric field. Under the action of the electric field, the droplet at the needle changes from a spherical shape to a conical shape (ie "Taylor cone") , and extend from the conical tip to obtain fiber filaments. In this way, polymer filaments with nanoscale diameters can be produced.

[0041] Step 3, preparing a thermoplastic polyurethane (TPU) elastomer solution to obtain an electrospinning solution;

[0042] Step 4, extracting the electrospinning liquid, and spinning through the...

Embodiment 1

[0058] A kind of preparation method of elastomer film is made by following steps:

[0059] Step 1, processing and customizing the collection template of electrospinning;

[0060] Step 2. Change the receiving device in the electrospinning equipment from a drum to a collection template, and adjust the parameters of the electrospinning equipment;

[0061] Step 3, preparing a thermoplastic polyurethane (TPU) elastomer solution to obtain an electrospinning solution;

[0062] Step 4: extracting the electrospinning solution and spinning it through the electrospinning equipment; after the spinning is completed, the film is peeled off from the collection template to obtain an elastomeric film with no protrusions on the surface and randomly distributed fiber grids inside.

[0063] The surface roughness of the elastomer film prepared in this example is 9.431.

[0064] In the first step, a rectangular iron woven wire mesh with a template length of 40 cm and a width of 20 cm is collected...

Embodiment 2

[0070] A preparation method of an elastomer film with a multi-level microstructure is prepared by the following steps:

[0071] Step 1, processing and customizing the collection template of electrospinning;

[0072] Step 2. Change the receiving device in the electrospinning equipment from a drum to a collection template, and adjust the parameters of the electrospinning equipment;

[0073] Step 3, preparing a thermoplastic polyurethane (TPU) elastomer solution to obtain an electrospinning solution;

[0074] Step 4, extracting the electrospinning liquid, and spinning through the electrospinning equipment; after the spinning is completed, the film is peeled off from the collection template to obtain an elastomeric film with a multi-level microstructure.

[0075] The elastomer film with multi-level microstructure prepared in this example has regular hill-shaped micro-protrusions on one side and randomly distributed fiber network inside, and its surface roughness is 13.645.

[00...

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Abstract

The invention discloses an elastomer film with a multi-level microstructure, its preparation method and a flexible pressure sensor containing the elastomer film. One side has a multi-level microstructure composed of randomly distributed fiber networks, which meets the requirements of low cost while being stable and fast to prepare. In addition, electrospinning technology is widely used in industrial practice, so the preparation method of the present invention has application prospects in large-scale industrial production. The flexible pressure sensor prepared by the invention has high sensitivity (>63.93kPa ‑1 ) and a large sensing range (>160kPa), not only has a strong response to small vibrations such as human pulse and vocal cord vocalization, but also has a stable response to large body movements such as joint movements. In the real-time monitoring of pressure Shows good response and great application potential.

Description

technical field [0001] The invention belongs to the technical field of flexible pressure sensor manufacturing, and in particular relates to an elastic body film with a multi-level microstructure, a preparation method thereof and a flexible pressure sensor containing the elastic body film. Background technique [0002] Driven by numerous smart devices such as artificial skin, wearable electronics, and health monitoring, flexible pressure sensors capable of monitoring and distinguishing subtle pressures as well as deformations have attracted extensive attention. A pressure sensor is a device that can sense pressure signals and convert pressure signals into usable electrical signals according to certain rules. There are three main types: capacitive, piezoelectric and resistive, of which resistive Due to its simple integration process, easy signal collection and excellent sensing performance, flexible pressure sensors have attracted special attention from researchers, and have b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01L1/20
CPCG01L1/205
Inventor 杨硕程博闻丁凯王伟
Owner TIANJIN UNIV OF SCI & TECH
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