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A preparation method of self-healing graphene-based pressure sensor

A pressure sensor and graphene-based technology, applied in the field of smart polymers, can solve the problems that the self-healing performance cannot be improved at the same time, the pressure sensor cannot self-repair and self-healing the conductive performance of conductive polymers, etc., and the filling amount and the three-dimensional network structure can be The effect of good controllability, good sensitivity and stability, and high conductivity

Inactive Publication Date: 2019-10-11
SUZHOU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method solves the problem that the existing pressure sensor cannot be self-healing and the problem that the conductivity and self-healing performance of the self-healing conductive polymer cannot be improved at the same time, and provides a self-healing graphene-based pressure sensor preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A preparation method for a self-repairing graphene-based pressure sensor, comprising the following steps:

[0029] 1) Preparation of one-dimensional silver nanowire material

[0030] a) Ethylene glycol pretreatment: Add 50 mL of ethylene glycol into a three-necked flask and fully heat at 150°C for 10 minutes;

[0031] b) Add 1 mL of NaCl aqueous solution to the solution formed in step a), and heat for 10 minutes; the concentration of NaCl aqueous solution is 0.002 mol / L;

[0032] c) Dissolve 10 g of silver nitrate in ethylene glycol to form a 0.3 mol / L silver nitrate solution; dissolve 15 g of polyvinylpyrrolidone (PVP) in ethylene glycol to form a 0.4 mol / L PVP solution; Take 10 mL of silver nitrate solution and add it to the mixed solution formed in step b), and at the same time, take 30 mL of PVP solution and slowly drop it in through a peristaltic pump, and the time is controlled within 50 minutes;

[0033] d) After the dropwise addition, the reaction solution obt...

Embodiment 2

[0046] A preparation method for a self-repairing graphene-based pressure sensor, comprising the following steps:

[0047] 1) Preparation of one-dimensional silver nanowire material

[0048] a) Ethylene glycol pretreatment: Add 60 mL of ethylene glycol into a three-necked flask and fully heat at 155°C for 16 minutes;

[0049] b) Add 1.8 mL of NaCl aqueous solution to the solution formed in step a), and heat for 10 minutes; the concentration of NaCl aqueous solution is 0.0025 mol / L;

[0050] c) Dissolve 15 g of silver nitrate in ethylene glycol to form a 0.35 mol / L silver nitrate solution; dissolve 14 g of polyvinylpyrrolidone (PVP) in ethylene glycol to form a 0.48 mol / L PVP solution; Take 13 mL of silver nitrate solution and add it to the mixed solution formed in step b), and at the same time, take 35 mL of PVP solution and slowly drop it in through a peristaltic pump, and the time is controlled within 65 minutes;

[0051] d) After the dropwise addition, the reaction solutio...

Embodiment 3

[0064] A preparation method for a self-repairing graphene-based pressure sensor, comprising the following steps:

[0065] 1) Preparation of one-dimensional silver nanowire material

[0066] a) Ethylene glycol pretreatment: Add 70 mL of ethylene glycol into a three-necked flask and fully heat at 160°C for 25 minutes;

[0067] b) Add 2 mL of NaCl aqueous solution to the solution formed in step a), and heat for 12 minutes; the concentration of NaCl aqueous solution is 0.003 mol / L;

[0068] c) Dissolve 8 g of silver nitrate in ethylene glycol to form a 0.4 mol / L silver nitrate solution; dissolve 20 g of polyvinylpyrrolidone (PVP) in ethylene glycol to form a 0.5 mol / L PVP solution; Take 15 mL of silver nitrate solution and add it to the mixed solution formed in step b), and at the same time, take 30 mL of PVP solution and slowly drop it in through the peristaltic pump, and the time is controlled within 70 minutes;

[0069] d) After the dropwise addition, the reaction solution ob...

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Abstract

The present invention discloses a self-repairing graphene-based pressure sensor and a preparation method thereof. A grapheme@silver nanowire composite conductor is added into a self-repairing macromolecule matrix to make a conductive elastomer having a self-repairing function; and the self-repairing conductive elastomer is packaged to a pressure sensor. The contradictory problem is solved that the conductivity and the conductivity and the self-repairing performance of the traditional self-repairing conductive polymeric materials are difficult to optimize at the same time. The self-repairing graphene-based pressure sensor and the preparation method thereof have the following advantages: 1, the drying processing is not needed in the grapheme@silver nanowire composite conductor postprocessing to reduce the hard-agglomeration problem of the grapheme@silver nanowire; the grapheme@silver nanowire composite conductor is easy to form a three-dimensional cross-linked network structure in the self-repairing polymer matrix; and the self-repairing graphene-based pressure sensor is long in life, high in conductivity and high in sensitivity.

Description

technical field [0001] The invention relates to the field of intelligent polymers, more specifically, to a preparation method of a self-repairing graphene-based pressure sensor. Background technique [0002] In recent years, with the rapid development of wearable electronics, flexible electronic devices have shown great application prospects in medical devices, energy, information, industry and other fields. Among them, the flexible pressure sensor is an electronic device that converts external force signals into electrical signals, and has been widely used. However, after the traditional flexible pressure sensor is subjected to external damage, self-fatigue, and aging, the pressure sensor loses its basic sensing function, which seriously reduces the service life and stability of the device. Therefore, it is of great significance to develop a flexible pressure sensor with self-healing function. [0003] In order to obtain self-healing flexible pressure sensors, researchers...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01L1/18G01L9/06C08L77/08C08K7/06C08K3/04C08G69/34C08J5/18
Inventor 赵博文沈伟刘涵周兴王丽丽李珅曹丰宋冠宇杜逸纯汤强
Owner SUZHOU UNIV OF SCI & TECH