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Wearable multifunctional flexible sensor and manufacturing method thereof

A flexible sensor and multi-functional technology, applied in the direction of instruments, measuring devices, material resistance, etc., can solve problems such as pollution, inability to guarantee flexibility, high cost, etc., and achieve the effect of wide application prospects, good product performance, and simple operation

Active Publication Date: 2019-01-01
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although a large number of studies have shown that carbon nanotubes have excellent performance in the field of sensors, the high cost, the complexity of the preparation process and the pollution generated during the preparation process have limited its development.
In addition, traditional sensors are mostly fixed on hard substrates, which cannot guarantee their own flexibility. With the rapid development of wearable electronics, single-function sensors can no longer meet the requirements of flexible wearable multi-functional real-time monitoring.

Method used

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  • Wearable multifunctional flexible sensor and manufacturing method thereof
  • Wearable multifunctional flexible sensor and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Evenly mix graphite, sulfuric acid, oxalic acid and glycerol at a mass ratio of 5:1:1:1;

[0033] (2) Mix the mixture obtained in step (1) with deionized water at a mass ratio of 1:5 and stir evenly at room temperature at a rate of 1000 rpm to obtain carbon ink, and place it in a refrigerator at 2°C Refrigerate for 24 hours;

[0034] (3) Soak the cupro ammonia fabric cleaned 3 times by ultrasonic in the carbon ink in step (2) for 5 minutes, take it out and dry it in an oven at 120°C for 10 minutes;

[0035] (4) Repeat step (3) 5 times, and the deposition amount of different inks is 4.68 mg cm -2 layer of inductive conductive material;

[0036] (5) The two ends of the obtained sensing conductive layer are connected by conductive silver glue and leads are drawn out to form a multi-functional flexible sensor.

[0037] The strain sensing performance and liquid sensing performance of the prepared multifunctional flexible sensor were tested respectively, and it was fou...

Embodiment 2

[0039] (1) Evenly mix graphite, sulfuric acid, oxalic acid and glycerol at a mass ratio of 5:2:2:2;

[0040] (2) Mix the mixture obtained in step (1) with deionized water at a mass ratio of 1:10 and stir evenly at room temperature at a rate of 1000 rpm to obtain carbon ink, and place it in a refrigerator at 2°C Refrigerate for 24 hours;

[0041] (3) Soak the cupro ammonia fabric cleaned 3 times by ultrasonic in the carbon ink in step 2) for 5 minutes, then take it out and place it in an oven at 120°C for 5 minutes;

[0042](4) Repeat step (3) 3 times, and the deposition amount of different inks is 2.32 mg cm -2 layer of inductive conductive material;

[0043] (5) The two ends of the obtained sensing conductive layer are connected by conductive silver glue and leads are drawn out to form a multi-functional flexible sensor.

[0044] The strain sensing performance and liquid sensing performance of the prepared multifunctional flexible sensor were tested respectively, and it wa...

Embodiment 3

[0046] (1) Evenly mix graphite, sulfuric acid, oxalic acid and glycerol at a mass ratio of 5:2:3:3;

[0047] (2) Mix the mixture obtained in step (1) with deionized water at a mass ratio of 1:15 and stir evenly at room temperature at a rate of 1000 rpm to obtain carbon ink, and place it in a refrigerator at 4°C Refrigerate for 48 hours;

[0048] (3) Soak the Tencel fabric cleaned twice by ultrasonic waves in the carbon ink in step (2) for 5 minutes, then take it out and dry it in an oven at 130°C for 5 minutes;

[0049] (4) Repeat step (3) once, and the deposition amount of different inks is 1.26 mg cm -2 layer of inductive conductive material;

[0050] (5) The two ends of the obtained sensing conductive layer are connected by conductive silver glue and leads are drawn out to form a multi-functional flexible sensor.

[0051] The strain sensing performance and liquid sensing performance of the prepared multifunctional flexible sensor were tested respectively. It was found th...

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Abstract

The invention belongs to the electronic material technology field and discloses a multifunctional flexible sensor and a manufacturing method thereof. The multifunctional flexible sensor comprises a flexible substrate layer and an inductive and conductive composite material layer. The flexible substrate layer comprises a cellulose fabric. The inductive and conductive composite material layer is mainly carbon ink. Through a simple and effective dip-coating method, the manufacturing of the multifunctional flexible sensor is realized. The multifunctional flexible sensor has universality and is suitable for most of cellulose fabrics. The sensor has characteristics of rapid and large scale manufacturing, low cost, good product performance, simple operation, environmental protection and the like.The multifunctional flexible sensor combines the functions of a strain sensor and a liquid sensor and has a wide application prospect in the fields of environment monitoring, human body motion and awearable field.

Description

technical field [0001] The invention belongs to the technical field of electronic materials, and in particular relates to a multifunctional flexible sensor and a preparation method thereof. Background technique [0002] In order to meet the needs of the development of wearable and flexible electronics, more and more versatile flexible sensors, such as pressure sensors, humidity sensors, temperature sensors, and liquid sensors, have attracted extensive attention from researchers. As a new type of communication platform, flexible sensors can be integrated into textiles to monitor environmental changes, human health and exercise and fitness in real time. In order to effectively detect changes in the mechanical or electrical signals of the sensor to external stimuli, researchers have developed a large number of sensing materials, such as metal oxides, silicon nanowires, water-soluble polymers, carbon materials, etc. (X. Wang , S. H. Wang, Y. Yang and Z. L. Wang, ACS Nano, 2015,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D21/02G01L1/22G01N27/07
CPCG01D21/02G01L1/2287G01N27/07
Inventor 毕思伊吕银祥
Owner FUDAN UNIV
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