Super-long service life self-repairing stress sensor based on printable nano composite material and preparation method thereof

A technology of nano-composite materials and stress sensors, which is applied to the printing, printing, and printing processes of producing special varieties of printed matter. It can solve the problems of low sensitivity and self-repairing stress sensors that have not been reported yet, and achieve high sensitivity and working strain range. Wide, the effect of improving the service life

Active Publication Date: 2020-09-18
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its sensitivity is much less than 100
[0009] So far, self-healing stress sensors with ultra-long lifetime, high sensitivity (gauge factor>100), and large tensile range (>50%) have not been reported

Method used

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  • Super-long service life self-repairing stress sensor based on printable nano composite material and preparation method thereof
  • Super-long service life self-repairing stress sensor based on printable nano composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (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.

[0030] (2) 1 g of polyvinyl alcohol, 455 mg of succinic anhydride, and 13 mg of p-toluenesulfonic acid were added to the DMSO solution, followed by stirring at 50° C. for 48 hours. Then, it was dialyzed in water for 5 days to remove impurities, and the solution was spin-dried to obtain PVAA as a white solid.

[0031] (3) Add 200mL of DMF, 500mg of PVAA, 96mg of amantadine, 53mg of N-(3-dimethylaminopropyl)-N'-ethylcarbodiimide hydrochloride into a 500mL round bottom flask equipped with a magnetic stirrer , 43mg of 1-hydroxybenzotriazole monohydrate and 55.8mg of N,N-diisopropylethylamine. Heat and stir at 70°C for 24 hours. The crude solution was dia...

Embodiment 2

[0038] (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.

[0039] (2) Weigh 1mL silver nanowire (length 5μm, diameter 30-40nm) dispersion (15mg / mL) in reagent bottle, add 2.5mL 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.

[0040] (3) Add 200mL of DMF, 500mg of polyacrylic acid, 96mg of cucurbituril, and 53mg of N-(3-dimethylaminopropyl)-N'-ethylcarbodiimide hydrochloride into a 500mL round bottom flask equipped with a magnetic stirrer , 43mg of 1-hydroxybenzotriazole monohydrate and 55.8mg of N,N-diisopropylethylamine. Heat and stir at 70°C for 24 hours. The crude solution was dialyzed against deionized water for 5 days to remove impurities a...

Embodiment 3

[0046] (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.

[0047] (2) Weigh 2mL of the silver nanowire (length 5μm, diameter 30-40nm) dispersion (10mg / mL) into the reagent bottle, add 2mL of the 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 nanowires and graphene oxide.

[0048] (3) Add 200 mL of DMF, 500 mg of polyacrylamide, 96 mg of column[6]arene, 53 mg of N-(3-dimethylaminopropyl)-N'-ethylcarbodiethylene into a 500 mL round bottom flask equipped with a magnetic stirrer Amine hydrochloride, 4...

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Abstract

The invention discloses a super-long service life self-repairing stress sensor based on a printable nano composite material and a preparation method thereof. According to the invention, nano compositematerial colloid ink with rheological properties is prepared by compounding a one-dimensional metal nanowire, a two-dimensional inorganic nanosheet, a polymer material containing host-guest interaction, a corresponding high-boiling-point solvent and the like, and the stress sensor with in-situ self-repairing capability and long cycle service life is prepared by a silk-screen printing method. In the working process of the sensor, the contained host-guest polymer material can repair defects generated inside in real time and in situ, and the service life of the material is greatly prolonged. Meanwhile, the sensor has the advantages that the working strain range is larger than 50%, the sensitivity gauge factor is larger than 100, the self-repairing capacity is high, and the anti-interferencecapacity to sweat is high. The sensor is easy to prepare and has a huge application prospect in the fields of intelligent wearable devices and the like.

Description

technical field [0001] The invention belongs to the technical field of flexible stress sensors, relates to the technical fields of nanocomposite materials, printed electronic devices, and self-repairing materials, in particular to an ultra-long-life self-repairing mechanical sensor and a preparation method thereof. It is mainly used for the monitoring of human movement in a small range to a large range, with high sensitivity, large working range, and strong anti-interference ability. It has great application prospects in the fields of electronic skin, bionic robots, and wearable devices. Background technique [0002] Wearable mechanical sensors have great prospects due to their wide range of applications, and people use wearable mechanical sensors more and more frequently in daily life. According to statistics, in normal life, the knee joint will bend about 100,000 times a week; the WeChat sports app shows that the number of steps a person takes is about 10,000 per day. Im...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L1/00C09D11/52C09D11/033C09D11/03B41M3/00B41M1/22B41M1/12B33Y10/00B29C64/106
CPCB41M1/12B41M1/22B41M3/00B33Y10/00B29C64/106C09D11/03C09D11/033C09D11/52G01L1/00
Inventor 梁嘉杰刘阳
Owner NANKAI UNIV
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