Stress sensor with self-repairing ability and preparation method thereof

A stress sensor and self-repairing technology, applied in the direction of nanotechnology for sensing, measurement of the force of properties of piezoelectric resistance materials, nanotechnology for materials and surface science, etc., can solve the problem that stress sensors have not seen before Reporting, poor sensitivity and other issues, to achieve the effect of easy batch preparation, high sensitivity, and good anti-fatigue properties

Inactive Publication Date: 2019-07-05
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The gauge factor of the sensor is only 40, the sensitivity is poor
[0007] However, stress sensors with self-healing ability have not been reported yet.

Method used

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  • Stress sensor with self-repairing ability and preparation method thereof
  • Stress sensor with self-repairing ability and preparation method thereof
  • Stress sensor with self-repairing ability and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] (1) Weigh 0.2 g of graphene oxide with a sheet size of about 1-2 μm prepared by a chemical method and place it in a beaker, add 100 mL of deionized water, and ultrasonicate for 30 minutes to obtain a 2 mg / mL graphene oxide dispersion. L NaHCO 3 The solution adjusts the pH value of the graphene oxide dispersion to 6.5.

[0042] (2) Weigh 1g of low molecular weight polyvinyl alcohol and place it in a beaker, add 99mL of deionized water, heat and stir at 80°C to dissolve, and obtain a 1% mass fraction of polyvinyl alcohol solution

[0043] (3) Weigh 10mg of calcium chloride into a beaker, add 9.99mL of deionized water, and ultrasonicate for 10 minutes to obtain a 1mg / mL calcium chloride solution

[0044] (4) Weigh 2mL of silver nanowire (length 5um, diameter 30-40nm) dispersion (10mg / mL) in the reagent bottle, add 1.25mL of the graphene oxide solution obtained in step (1), and ultrasonically vibrate to make it re- dispersion. Suction filtration with a microporous membra...

Embodiment 2

[0050] (1) Weigh 0.2 g of MXene (Ti 3 C 2 X) Place in a beaker, add 100mL of deionized water, and sonicate for 30 minutes to obtain 2mg / mL of MXene(Ti 3 C 2 X) Dispersions.

[0051] (2) Weigh 0.4mL silver nanowire (length 5um, diameter 30-40nm) dispersion (10mg / mL) in the reagent bottle, add 0.4mL step (1) to obtain MXene (Ti 3 C 2 X) solution, sonicated to redisperse it. Suction filter with microporous membrane, wash several times with deionized water, suck off the supernatant, and obtain MXene containing silver nanowires (Ti 3 C 2 X) Conductive gel.

[0052] (3) Weigh 1 g of polyacrylic acid and place it in a beaker, add 99 mL of deionized water, heat at 80° C. and stir to dissolve to obtain a 1% mass fraction of polyacrylic acid solution.

[0053] (4) Weigh 10 mg of ferric chloride into a beaker, add 10 mL of deionized water, and sonicate for 10 minutes to obtain a 1 mg / mL ferric chloride solution.

[0054] (5) Take 8 μL of the polyacrylic acid solution obtained in...

Embodiment 3

[0058] (1) Weigh 0.2 g of graphene oxide with a sheet size of about 1-2 μm prepared by a chemical method and place it in a beaker, add 100 mL of deionized water, and ultrasonicate for 30 minutes to obtain a 2 mg / mL graphene oxide dispersion. L NaHCO 3 The solution adjusts the pH value of the graphene oxide dispersion to 6.5.

[0059] (2) Weigh 1.35g of adamantyl tetraethylene glycol ether and 5g of β-cyclodextrin tetraethylene glycol ether into a beaker, add 56.15mL of deionized water, and stir for 24 hours to obtain 10% host-guest-containing Clear transparent dispersion of the structure.

[0060] (3) Weigh 6mL of silver nanowire (length 5um, diameter 30-40nm) dispersion (10mg / mL) into a reagent bottle, add 10mL of graphene oxide solution obtained in step (1), and ultrasonically oscillate to redisperse it . Suction filtration with a microporous membrane, washing with deionized water several times, and sucking off the supernatant to obtain a conductive gel containing silver ...

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Abstract

The invention discloses a stress sensor with a self-repairing ability and a preparation method thereof. according to the preparation method, a one-dimensional metal nanowire, a two-dimensional inorganic nanosheet, hydrogel functional polymers, an additive and the like are compounded to prepare a nanocomposite colloidal printing ink with rheological characteristics, and the colloidal printing ink is printed on a wearable substrate through screen printing to prepare the repairable stress sensor having a shell-like bionic structure, wherein the one-dimensional metal nanowire provides a conductivenetwork structure for reducing resistance of the sensor; the two-dimensional inorganic nanosheet forms a layered strcture for improving sensitivity of the sensor; and a reversible dynamic cross-linking point is formed among the repairable hydrogel functional polymers, the two-dimensional inorganic nanosheet and the additive, so that the device has repairable performance. The prepared stress sensor has the advantages of large operating strain range, high sensitivity, repairable property after overload damage and the like, and has great application prospects in the fields of artificial electronic skin and biomimetic robots.

Description

technical field [0001] The invention belongs to the technical field of flexible stress sensors, relates to the technical fields of nanocomposite materials, self-repairing materials, conductive inks and printed electronic products, and particularly relates to a self-repairing, high-sensitivity, large-working-range mechanical sensor and a preparation method thereof. It is mainly used to monitor human movement from small to large range such as pulse, bending, etc. It has great application prospects in the fields of intelligent medical care, artificial electronic skin, bionic robots, and wearable devices. Background technique [0002] Wearable mechanical sensors have great prospects due to their wide application. As people use wearable mechanical sensors more and more frequently in daily life, the inevitable damage such as scratches greatly shortens the life of the device and improves the maintenance of the device. cost. Repairable devices can self-repair after being damaged, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L1/18B82Y15/00B82Y30/00
CPCB82Y15/00B82Y30/00G01L1/18
Inventor 梁嘉杰刘阳史鑫磊刘水任
Owner NANKAI UNIV
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