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Silk protein-based flexible composite sensor and preparation method thereof

A composite sensor and silk protein technology, applied in the field of sensors, can solve problems such as difficulty in returning the resistance value to the initial value, inability to sense temperature, unstable resistance value, etc., to achieve environmental protection, reduce material consumption, and increase lifespan Effect

Pending Publication Date: 2021-08-13
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is that the existing single humidity sensor made of silk protein can only sense humidity, but cannot sense temperature, and although the silk protein film obtained by dissolving lithium bromide has excellent flexibility, it cannot However, it cannot be stretched, and the composite sensor based on silk protein by simply adding conductive substances faces problems such as unstable resistance and difficulty in returning to the initial value.

Method used

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  • Silk protein-based flexible composite sensor and preparation method thereof
  • Silk protein-based flexible composite sensor and preparation method thereof
  • Silk protein-based flexible composite sensor and preparation method thereof

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Embodiment 1

[0050] Such as Figure 1 to Figure 2 As shown, the present invention provides a flexible composite sensor based on silk protein, comprising: a flexible substrate 1, interdigital electrodes 2 and folded composite sensing materials 3, and the interdigitated electrodes 2 are located on the flexible substrate 1 and folded composite sensing materials Between 3, the folded composite sensing material 3 is silk protein and graphene film. Wherein, the material of the flexible base 1 is silk protein film and calcium ion film, the mass fraction of silk protein is 57wt%-80wt%, and the mass fraction of calcium ion is 20wt%-43wt%. The conductive substance used in the interdigital electrode 2 is one of conductive silver paste, conductive copper paste and conductive silver ink; the interdigital electrode 2 is provided with an electrode lead-out area 4, and the area of ​​the electrode lead-out area 4 is 2*2mm 2 The interdigital electrode 2 is provided with a gap that completely matches the fo...

Embodiment 2

[0062] A method for preparing a flexible composite sensor based on silk protein, comprising the following steps:

[0063] S1. Preparation of flexible substrate: Print the designed mold with a 3D printer, pour polydimethylsiloxane polymer or silica gel into the mold and pour the mold, and then pour the silk protein solution into the poured mold for a second time Invert the mold to obtain a flexible substrate 1 .

[0064] Specifically, first draw the mold through SOLIDWORKS drawing software, and the peripheral size of the mold is 60*60*3.5mm 3 , slot size 50*50*1mm 3 , and then print the mold through a high-precision 3D printer, and finally pour polydimethylsiloxane polymer (PDMS) or silica gel into the mold and pour the mold, and then pour the silk protein solution into the poured mold. Invert the mold for the second time and put it in an oven at 40°C for curing.

[0065] S2. Preparation of interdigitated electrodes: Print conductive silver paste or conductive silver ink on ...

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Abstract

The invention discloses a silk protein-based flexible composite sensor and a preparation method thereof, the flexible composite sensor comprises a flexible substrate, an interdigital electrode and a composite sensing material, the flexible substrate can be directly attached to the skin or the surface of other detected objects, the interdigital electrode is located between the flexible substrate and the composite sensing material, the composite sensing material is silk protein and a graphene film, can react to humidity changes and temperature changes in the environment, can also react to stretching, can generate corresponding changes through changes of different environmental factors, realizes sensing of the external environment, and is simple in manufacturing method, small in device size, flexible and wearable, and wide in application prospect.

Description

technical field [0001] The invention relates to the technical field of sensors, in particular to a flexible composite sensor based on silk protein and a preparation method thereof. Background technique [0002] With the advent of the era of intelligence, the development and combination of material science and smart electronics has triggered a huge change in the field of smart wearables, whether it is used to sense changes in the human body (such as body temperature, heart rate, breathing, etc.), or to use In order to help the human body perceive changes in the external environment, many requirements have been placed on the current wearable devices. [0003] In order to adapt to wearable devices, more and more flexible sensors have been designed in recent years, and many sensors have the advantages of high precision and high sensitivity. Although many excellent sensors with a single function have been reported, the performance of composite sensors is generally limited by fac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D5/16C07K14/435C07K1/14
CPCG01D5/16C07K14/43586
Inventor 张晓升李良原李博远文丹良涂程宋亚梅
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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