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Elastic strain sensor and preparation method thereof

A strain sensor, elastic strain technology, used in flexible wearable sensors, human-computer interaction, wearable devices, medical rehabilitation training fields, it can solve the problem that the stretching range is only 15%, the liquid metal is easy to leak, and the stretching range is small, etc. problems, to achieve the effect of improving sensitivity and sensor life, good electrical and mechanical properties, excellent tensile properties and stability

Active Publication Date: 2021-08-06
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The sensor has high sensitivity, but the stretching range is only 15%, which is difficult to meet the requirements of the test on the surface strain of human skin
Huang et al. proposed a strain sensor in Composites Science and Technology, 2020. The sensor is prepared by mixing carbon nanotubes and polydimethylsiloxane solution and then cured by laser ablation. The sensor preparation process is simple and cost-effective Low performance is easy to adjust, but there is still the problem that the stretch range is too small
Chen et al. proposed in ACS Applied Materials & Interfaces, 2020, 12, 22200-22211 to prepare sensors by using Ecoflex to make wave-shaped microchannels and inject eutectic gallium indium liquid metal. The sensor has good stretchability but has low sensitivity, The problem of easy leakage of liquid metal

Method used

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  • Elastic strain sensor and preparation method thereof
  • Elastic strain sensor and preparation method thereof
  • Elastic strain sensor and preparation method thereof

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Effect test

Embodiment 1

[0044] According to a method for preparing an elastic strain sensor provided by the present invention, comprising:

[0045] Step M1: Etching the MAX phase material to obtain the MXene material;

[0046] Step M2: adding a conductive material to the MXene material to obtain an MXene composite material;

[0047] Step M3: modifying the MXene composite material on the support material to form a sensitive layer of the strain sensor;

[0048] Step M4: Coating an elastic electrode support layer on the substrate and patterning it;

[0049] Step M5: preparing an electrode conductive layer on the elastic electrode support layer by using a peeling process;

[0050] Step M6: removing the substrate to obtain an elastic electrode;

[0051] Step M7: casting an elastic polymer to prepare an elastic substrate, and transferring the elastic electrodes to the elastic substrate;

[0052] Step M8: placing the sensitive layer of the strain sensor on the elastic electrode to obtain an elastic stra...

Embodiment 2

[0067] Embodiment 2 is a modification of embodiment 1

[0068] According to an embodiment of the present invention, a method for preparing an elastic strain sensor is provided, see figure 1 , including the following preparation steps:

[0069] M1. Etching MAX phase material 1 to obtain MXene material 2;

[0070] M2. add conductive material in described MXene material 2, obtain MXene composite material 3;

[0071] M3. modify the MXene composite material 3 on the support material 4 to form the sensitive layer 5 of the strain sensor;

[0072] M4. coating elastic electrode support layer 9 on substrate 8, and patterning;

[0073] M5. Utilize stripping process to prepare electrode conductive layer 10 on described supporting layer 9;

[0074] M6. remove the substrate 8 to obtain the elastic electrode 11;

[0075] M7. Cast elastic polymer 12 to prepare elastic substrate, and transfer the elastic electrode 11 to the elastic substrate;

[0076] M8. Place the sensitive layer 5 on t...

Embodiment 3

[0093] Embodiment 3 is a modification of embodiment 1 and / or 2

[0094] The MXene composite material 3 is a composite material of MXene and silver nanowires; the support material 4 is cotton with a thickness of 0.3 cm.

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Abstract

The invention provides an elastic strain sensor and a preparation method thereof. The preparation method comprises the steps of M1 etching an MAX phase material to obtain an MXene material; M2 adding a conductive material into the MXene material to obtain an MXene composite material; M3 modifying a supporting material with the MXene composite material to form a sensitive layer of the strain sensor; M4 coating an elastic electrode supporting layer on a substrate, and patterning the elastic electrode supporting layer; M5 preparing an electrode conducting layer on the elastic electrode supporting layer by using a stripping process; M6 removing the substrate to obtain an elastic electrode; M7 casting an elastic polymer to prepare an elastic substrate, and transferring the elastic electrode to the elastic substrate; and M8 placing the sensitive layer of the strain sensor on the elastic electrode. The sensor provided by the invention adopts a structure of modifying the MXene composite material on the supporting material to measure the strain, so that the sensitivity and the stretching range of the sensor are improved, and the service life of the sensor is prolonged.

Description

technical field [0001] The invention relates to the field of flexible wearable sensors, in particular to an elastic strain sensor and a preparation method thereof, which are applicable to fields such as wearable devices, medical rehabilitation training, and human-computer interaction. Background technique [0002] With the rise of flexible electronics and the development of human health medicine, the application of elastic sensors in wearable devices has attracted much attention because of their portability, real-time performance and reliability. Among them, wearable elastic strain sensors have great application potential in the fields of medical diagnosis, sports rehabilitation, virtual reality, robot manipulation, sports training, and entertainment. [0003] Compared with traditional copper foil strain gauges, elastic strain sensors have made great progress, but there is still a long way to go before they are practical. By searching the existing elastic strain sensor main...

Claims

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Application Information

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IPC IPC(8): G01B7/16B32B15/20B32B17/06B32B7/12B32B33/00
CPCG01B7/16B32B15/20B32B17/061B32B7/12B32B33/00
Inventor 陈迪王砚璞林树靖李其超吁子贤郭益平曹成喜崔大祥
Owner SHANGHAI JIAO TONG UNIV
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