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High-sensitivity flexible piezoresistive sensor based on MXene bionic skin structure

A piezoresistive sensor and skin structure technology, applied in the field of wearable electronics and new materials, can solve the problems of difficult wearability, poor light transmission, thick flexible piezoresistive sensor, etc., achieve good cycle stability and low cost , the effect of high sensitivity

Inactive Publication Date: 2019-12-17
HUBEI UNIV OF AUTOMOTIVE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the MXene-based flexible piezoresistive sensors constructed with existing geometric configurations are thick and poor in light transmission, making it difficult to achieve wearability.
In addition, the regulation of the contact resistance of MXene sensitive materials and flexible substrates on the sensitivity of piezoresistive sensors needs to be further explored.

Method used

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  • High-sensitivity flexible piezoresistive sensor based on MXene bionic skin structure
  • High-sensitivity flexible piezoresistive sensor based on MXene bionic skin structure
  • High-sensitivity flexible piezoresistive sensor based on MXene bionic skin structure

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Experimental program
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Effect test

preparation example Construction

[0045] (3) Preparation of MXene-based silica gel biomimetic layer;

[0046] (4) Preparation of flexible interdigitated electrodes;

[0047] (5) Assembly of MXene-based biomimetic piezoresistive sensors.

Embodiment 1

[0049] In a preferred embodiment of the present invention, a method for preparing a high-sensitivity flexible piezoresistive sensor based on MXene material sandpaper bionic skin structure, the method comprises the following steps:

[0050] S1: The MAX phase was etched by chemical solution method, followed by centrifugal cleaning and low temperature ultrasonic to prepare MXene nanosheets.

[0051] The commercially available MAX phase precursor-Ti 3 AlC 2 , wet chemical etching was carried out at 35°C for 24 hours to obtain multilayer MXene; the etchant was centrifuged and washed 8 times repeatedly, and then sonicated for 40 minutes in an ice bath under the protection of an inert atmosphere (argon gas). After centrifugation for 1 hour under the conditions of a rotor radius of 7 cm, a rotating speed of 3500 r / min, and a lifting rate of 1 gear, the obtained upper liquid is MXene (i.e., Ti 3 C 2 T x nanosheet) colloidal solution; the average diameter of the MXene nanosheets is ...

Embodiment 2

[0062] In a preferred embodiment of the present invention, a method for preparing a high-sensitivity flexible piezoresistive sensor based on MXene material sandpaper bionic skin structure, the method comprises the following steps:

[0063] S1: The MAX phase was etched by chemical solution method, followed by centrifugal cleaning and low temperature ultrasonic to prepare MXene nanosheets.

[0064] The commercially available MAX phase precursor-Ti 3 AlC 2 , wet chemical etching was carried out at 35°C for 24h to obtain multilayer MXene; the etchant was centrifuged and washed 7 times repeatedly, and then ultrasonically treated for 1h under the protection of an ice bath and an inert atmosphere (argon gas). After centrifugation for 1 hour under the conditions of a rotor radius of 7 cm, a rotating speed of 3500 r / min, and a lifting rate of 1 gear, the obtained upper liquid is MXene (i.e., Ti 3 C 2 T x nanosheet) colloidal solution; the average diameter of the MXene nanosheets is...

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Abstract

The invention discloses a high-sensitivity flexible piezoresistive sensor based on an MXene bionic skin structure. The high-sensitivity flexible piezoresistive sensor comprises a flexible interdigitalelectrode layer, an MXene-based silica gel bionic layer and a packaging layer; the MXene-based silica gel bionic layer is prepared by obtaining a film with a bionic skin structure through silica gelimpression abrasive paper and then coating the bionic film with the film; the flexible interdigital electrode layer is obtained through ink-jet printing and magnetron sputtering; the MXene-based silica gel bionic layer is in direct contact with an electrode area to form a loop; and the packaging material is preferably a polyethylene film. The flexible pressure-sensitive sensor provided by the invention has extremely high sensitivity, low detection limit, short response time and high stability, and shows great application potential in practical application of electronic skin, wearable electronic devices and the like. The sensor solves the problems that an existing MXene-based piezoresistive sensor is complex in preparation process and difficult to have high sensitivity and stability at thesame time.

Description

technical field [0001] The invention belongs to the technical field of wearable electronics and new materials, and specifically relates to a flexible piezoresistive sensor. More specifically, the invention relates to a high-sensitivity flexible piezoresistive sensor based on a two-dimensional MXene material sandpaper bionic skin structure and its Preparation methods and applications. Background technique [0002] In recent years, flexible pressure sensors, as one of the important components of smart devices, have received great attention in the fields of the Internet of Things and smart industries due to their characteristics of being arbitrarily bendable and comfortable to wear. According to different working principles, flexible pressure sensors are mainly divided into three types: piezoresistive, piezoelectric, and capacitive. Compared with piezoelectric and capacitive pressure sensors, piezoresistive pressure sensors (referred to as piezoresistive sensors) have the adva...

Claims

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Application Information

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IPC IPC(8): G01L1/20G01L9/02
CPCG01L1/20G01L9/02
Inventor 马亚楠
Owner HUBEI UNIV OF AUTOMOTIVE TECH
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