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Printable graphene/ZnO-nano-composite-material-based temperature and humidity sensor electrodes

A nano-composite material, temperature sensor technology, applied in material capacitors, thermometers, analytical materials, etc., can solve the problems of reducing commodity value, withering of fruits and vegetables, etc., and achieve the effect of good response recovery time and good linearity

Active Publication Date: 2018-02-06
QIQIHAR UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the one hand, the water evaporation of fruits and vegetables is due to the respiration, and on the other hand, the air humidity in the storage environment is too low, which causes the fruits and vegetables to wither, reducing the commodity value.

Method used

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  • Printable graphene/ZnO-nano-composite-material-based temperature and humidity sensor electrodes
  • Printable graphene/ZnO-nano-composite-material-based temperature and humidity sensor electrodes

Examples

Experimental program
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Effect test

Embodiment 1

[0026] A method for making a printable graphene / ZnO nanocomposite microarray temperature sensor electrode is as follows:

[0027] 1) Doping graphene with nano-ZnO. Take 10mg of graphene powder and disperse it into 100ml of dimethylformamide (DMF), ultrasonic treatment for 1h, the ultrasonic equipment adopts KQ-100DV CNC ultrasonic cleaner, then adjust the viscosity of EC-GNP solution by adding ethylene glycol and glycerin, and continue ultrasonication 1h, the solvent ratio is DMF: ethylene glycol: glycerol=50:45:5 vol%, obtains graphene conductive ink; Then 0.02g nano ZnO powder is added in this solution ultrasonic dispersion 1h, obtains graphene / ZnO nanocomposite Material conductive ink.

[0028] 2) Use graphene / ZnO nanocomposite conductive ink to print serpentine electrodes, and repeat printing 20 times to obtain printed electrodes. In the RTA rapid thermal annealing system, N 2 Under a protective atmosphere, anneal at 300°C for 300s to obtain printed electrodes for tempe...

Embodiment 2

[0033] Embodiment 2 Temperature and humidity sensor test results

[0034] In the present invention, the resistance value of the temperature sensor varies with temperature and its linearity is as follows: image 3 Shown; temperature sensor repeatability and stability as Figure 4 shown. The capacitance value of the humidity sensor varies with the humidity curve as shown in Figure 5 Shown; humidity sensor hysteresis and response recovery time as Image 6 Shown; humidity sensor repeatability and stability as Figure 7 shown.

[0035] It can be seen from the figure that the temperature sensor shows good linearity, the sensitivity is 1.6% Ω / ℃, the linearity and correlation factor are 2.0% and 0.995, respectively, and the repeatability and stability are good. The humidity sensor has a sensitivity of 6.568nF / RH% in a high-humidity environment and a hysteresis of 5.19%. It has good response recovery time and repeat stability.

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Abstract

The invention discloses printable graphene / ZnO-nano-composite-material-based temperature and humidity sensor electrodes and in particular relates to graphene / ZnO-nano-composite-material-based microarray printable temperature and humidity sensor electrodes. In addition, the invention also relates to methods for manufacturing the electrodes. According to the temperature and humidity sensor electrodes, sensors are printed on flexible substrates by an ink-jet printing technology; pasting to an agricultural product is realized; the sensors are arranged conveniently; and the price is low. Meanwhile,because of characteristics of the nano material, the temperature and humidity sensors have high linearity, sensitivity and stability. The graphene / ZnO-nano-composite-material-based snakelike microarray temperature sensor electrode has high linearity; the sensitivity of the testing technique is 1.6% omega / degrees, and the linearity and correlation factor are 2.0% and 0.995 respectively. The sensitivity of the humidity sensor electrode reaches 6.568nF / RH% in a high-humidity environment and the humidity hysteresis is 5.19%; and the response recovery time is good.

Description

technical field [0001] The invention relates to a printable graphene / ZnO nanocomposite material temperature and humidity sensor electrode, specifically a graphene / ZnO nanocomposite material microarray printable temperature and humidity sensor electrode, and the invention also relates to a manufacturing method thereof. Background technique [0002] Food safety is an important issue related to the national economy and the people's livelihood. It is the fourth largest global issue after population, resources and the environment. How to effectively supervise and manage food distribution and establish a traceability system covering the entire food industry chain is a key issue. The key to solving food safety problems. [0003] Heilongjiang Province is the largest grain-producing province in my country. In 2015, the total grain output reached 136.96 billion catties, accounting for one-tenth of the country's total, and the increase in output was nearly half of the country's total. ...

Claims

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Application Information

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IPC IPC(8): G01D21/02G01K7/16G01N27/22
CPCG01D21/02G01K7/16G01N27/223
Inventor 陶佰睿邵慧苗凤娟武文逸苗瑞
Owner QIQIHAR UNIVERSITY
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