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A flexible strain sensor with double-response strength line and its preparation method

A strain sensor and double-response technology, applied in the direction of electric/magnetic solid deformation measurement, electromagnetic measurement device, etc., can solve the problems of low accuracy and reliability, achieve low cost, simple and efficient method, high detection accuracy and reliability sexual effect

Active Publication Date: 2022-08-09
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, the existing flexible strain sensors only change the intensity signal under different strains, and there is no change in the line shape, and the accuracy and reliability of the test are low

Method used

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  • A flexible strain sensor with double-response strength line and its preparation method
  • A flexible strain sensor with double-response strength line and its preparation method
  • A flexible strain sensor with double-response strength line and its preparation method

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preparation example Construction

[0047] The invention relates to a flexible strain sensor with double-response strength lines and a preparation method thereof. The MXene conductive film is used as a sensitive layer to prepare a flexible strain sensor with double-response strength lines after being combined with a flexible sink and electrodes. The microstructure of MXene nanosheets can be regulated by the difference in the morphology of MXene nanosheets in different solvents, and then a flexible strain sensor with dual-response strength line is fabricated. The sensor device in the present invention exhibits signal intensity changes under different strains, and also exhibits characteristic electrical signal response curves, and can identify various deformations such as stretching and bending, and display different characteristic response curves. The sensing mechanism is that the MXene sensitive layer loaded on the surface of the flexible substrate is subjected to the dual action of cracks and inward extrusion me...

Embodiment 1

[0074] First, the Ti 3 AlC 2 The phase powder is added to the hydrochloric acid solution dispersed with lithium fluoride, and the reaction product is obtained by etching at 30 to 60 ° C for 6 to 48 hours; Freeze-drying at -15°C for 6-24 hours to obtain multilayer Ti 3 C 2 T x Powder; Ti is divided according to the ratio of (0.3~1)g:(40~100)ml 3 C 2 T x The powder is mixed with deionized water, ultrasonicated in an ice-water bath for 15min-2h under an inert atmosphere (such as argon), centrifuged at 2000-3500rpm for 0.25-1h, and the supernatant is taken, which is Ti 3 C 2 T x A single layer or a few layers. After freezing to form a solid, put it into a freeze dryer for 12 to 24 hours to remove moisture to obtain loose flocculent Ti 3 C 2 T x powder. Then to 2mg Ti 3 C 2 T x After adding 10-20 mL of toluene as a solvent, sonicate for 5-15 min to make Ti 3 C 2 T x The nanosheets were well dispersed in the solvent system, and Ti was obtained by vacuum filtration...

Embodiment 2

[0080] First, the Ti 3 AlC 2 The phase powder is added to the hydrochloric acid solution dispersed with lithium fluoride, and the reaction product is obtained by etching at 30 to 60 ° C for 6 to 48 hours; Freeze-drying at -15°C for 6-24 hours to obtain multilayer Ti 3 C 2 T x Powder; Ti is divided according to the ratio of (0.3~1)g:(40~100)ml 3 C 2 T x The powder is mixed with deionized water, ultrasonicated in an ice-water bath for 15min-2h under an inert atmosphere (such as argon), centrifuged at 2000-3500rpm for 0.25-1h, and the supernatant is taken, which is Ti 3 C 2 T x A single layer or a few layers. After freezing to form a solid, put it into a freeze dryer for 12 to 24 hours to remove moisture to obtain loose flocculent Ti 3 C 2 T x powder. Then to 2mg Ti 3 C 2 T x After adding 10-20 mL of m-xylene as a solvent, sonicate for 5-15 min to make Ti 3 C 2 T x The nanosheets were well dispersed in the solvent system, and Ti was obtained by vacuum filtratio...

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Abstract

The invention relates to a flexible strain sensor with double-response strength line and a preparation method thereof. The flexible strain sensor with double-response intensity line includes: a sensitive material, the sensitive material is a conductive film formed by two-level stacking of single-layer or few-layer MXene nanosheets in an organic solvent; a flexible substrate, the flexible substrate The bottom is used to load the sensitive material; the electrodes are located at both ends of the sensitive material; and the encapsulation layer is used to protect the sensitive material.

Description

technical field [0001] The invention relates to a flexible wearable sensor and a preparation method thereof, in particular to a flexible strain sensor based on MXene and having dual-response strength and linearity, belonging to the field of flexible and wearable electronics and the technical field of new materials. Background technique [0002] In recent years, flexible electronic devices have gradually become a research hotspot. Because of their flexibility and elasticity, they can replace traditional rigid devices to achieve good fit with flexible substrates and meet the deformation requirements of equipment. Among them, flexible electronic sensors have similar functions to human skin and can be used to sense and monitor changes in various external signals. They have great potential in many fields such as motion sensing, health monitoring, communication and entertainment, and human-computer interaction. [0003] Among many external signals, mechanical signals such as press...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B7/16
CPCG01B7/16
Inventor 孙静唐昊王冉冉
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI