Preparation method of laser-induced graphene flexible strain-temperature two-parameter sensor

A laser-induced graphene technology, applied in the field of sensors, can solve the problems of susceptibility to the influence of dopamine, complex sensor structure and preparation process, and complex production process, to achieve excellent electrochemical characteristics, and the production process is green and pollution-free. The effect of high response volume

Pending Publication Date: 2021-02-12
HEBEI UNIV OF TECH
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  • Application Information

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Problems solved by technology

Although this method uses photolithography, what is obtained is a microfluidic channel mold, which needs to be modified with dopamine, so the structure and preparation process of the sensor are still relatively complicated, and the performance of the sensor is easily affected by dopamine, and it is only obtained In addition to the strain sensor, there are still limitations and sensitivity problems for the application in the field of biomedicine in today's society
Patent CN111599920A Flexible temperature sen

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  • Preparation method of laser-induced graphene flexible strain-temperature two-parameter sensor
  • Preparation method of laser-induced graphene flexible strain-temperature two-parameter sensor
  • Preparation method of laser-induced graphene flexible strain-temperature two-parameter sensor

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[0043]Example 1

[0044]Structure of laser induced graphene flexible strain - temperature double parameter sensor, such asfigure 1 As shown, including a flexible tensile substrate 1, a graphene conductive layer 2, a conductive copper foil 3, a wire 4. The flexible stretchable substrate 1 is placed at the bottom of the sensor, is made of a flexible stretchable material PDMS, and the surface of the flexible stretchable substrate is closely fitted with a graphene conductive layer 2, and the graphene conductive layer can be flexible. The tensile substrate 1 is simultaneously stretched, bending, the graphe element is 1.29 mm, the length is 17.62 mm, and the two ends of the grapher dielectric layer are graphene electrodes for connecting the external test equipment; the conductive copper foil 3 passed The conductive silver gel is connected to the graphene electrode at both ends of the graphene conductive layer, wherein the conductive silver glue is uniformly attached to the conductive copper ...

Example Embodiment

[0060]Example 2

[0061]A laser-induced graphene flexible strain-temperature double parameter sensor includes a flexible tensile substrate PDMS, a graphene conductive layer, a conductive copper foil, a wire. The flexible stretchable substrate is placed at the bottom of the sensor, the flexibility, the graphene conductive layer is placed over the flexible stretchable substrate, closely fitted.

[0062]The graphene conductive layer is also stretched with the flexible tensile substrate, curved, and the conductive graphene width is 1.29 mm, the length is 17.62 mm, and the two ends are graphene electrodes for connecting external testing equipment.

[0063]The copper foil is connected to the electrode of the graphene by conductive silver gel, wherein the conductive silver glue is uniformly attached to the conductive copper foil, and heat it on the 80 ° C heating table for 40 minutes, and after being completely cured, use solder to link the wire to the copper foil. . The copper foil has a length of...

Example Embodiment

[0067]Example 3

[0068]A laser induced graphene flexible strain - temperature double parameter sensor has different resistance change rates at different stretching ratiosFigure 6 As shown, the sensor responds to the resistance change rate at 5%, 10%, 15%, and 20% stretch rates. Repeated stretch release 7 times at each stretch rate, the stretch resistivity increases, and the release can be basically Complete recovery, performance is still good after many experiments. At a stretch rate of 5%, the sensor has a 180% strain resistance change rate response; at a stretch rate of 10%, the sensor has a 750% strain resistance change rate response; at a stretch rate of 15% , The sensor has a response of 1200% strain resistance change rate (the ordinate is the resistance change rate = (resistance after stretching-initial resistance) / initial resistance * 100%); at a stretch rate of 20%, the sensor has 1600 % Response of strain resistance change rate.

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Abstract

The invention relates to a preparation method of a laser-induced graphene flexible strain-temperature two-parameter sensor, wherein the method comprises the steps: preparing a preset pattern on a polyimide film by using laser to obtain patterned laser-induced graphene (LIG); uniformly mixing and stirring a PDMS solution according to a ratio of A to B of 10:1, standing for 30 minutes until bubblescompletely disappear, coating the prepared LIG with the PDMS, putting the coated LIG into a heating box at the temperature of 85 DEG C, heating for 120 minutes for curing, taking out after curing, melting the hydrosol with clear water to obtain a flexible material separated from a glass slide, and uncovering the PDMS to peel the LIG from the PI film; and finally, coating with conductive silver adhesive, and bonding a wire to obtain the flexible patterned graphene strain-temperature two-parameter sensor. The preparation method provided by the invention does not need a complex processing technology, is suitable for large-scale preparation and refined pattern processing, has no requirement on an operation environment, and is simple to operate. Wide application prospects are realized in the field of medical health wearable devices.

Description

technical field [0001] The invention belongs to the field of sensors, in particular to a high-sensitivity flexible wearable laser-induced graphene flexible strain-temperature dual-parameter sensor and a preparation method. Background technique [0002] As a precise device or device, a sensor can convert various non-electrical signals that are difficult to capture or measure into electrical signals that are easy to detect and display. an essential part of. In particular, flexible wearable sensors have broad application prospects in the fields of artificial intelligence, bioelectronics and medical care, and human-computer interaction. Flexible and wearable sensors with high sensitivity can be used to monitor physiological parameters such as pulse and respiration of the human body, and thus become a hot research direction in the field of healthcare. [0003] Graphene is a carbon atom with sp 2 The hybrid orbitals form a hexagonal two-dimensional carbon nanomaterial with a ho...

Claims

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Application Information

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IPC IPC(8): G01B7/16G01K7/16
CPCG01B7/18G01K7/16
Inventor 杨丽陈雪徐桂芝王宏丽姬华东郑广浩
Owner HEBEI UNIV OF TECH
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