Unlock instant, AI-driven research and patent intelligence for your innovation.

Printable graphene/zno nanocomposite 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: 2019-12-24
QIQIHAR UNIVERSITY
View PDF3 Cites 0 Cited by
  • 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Printable graphene/zno nanocomposite temperature and humidity sensor electrodes
  • Printable graphene/zno nanocomposite temperature and humidity sensor electrodes
  • Printable graphene/zno nanocomposite temperature and humidity sensor electrodes

Examples

Experimental program
Comparison scheme
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 Figure 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.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Sensitivityaaaaaaaaaa
Login to View More

Abstract

The invention discloses 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 its manufacturing method . The electrode of the temperature and humidity sensor of the present invention uses the inkjet printing technology to print the sensor on the flexible substrate, which can be pasted on the agricultural product or its surroundings, which is convenient for the arrangement of the sensor and low in price. At the same time, due to the characteristics of nanomaterials, the temperature and humidity sensor has good linearity, sensitivity and stability. The temperature sensor electrode based on the graphene / ZnO nanocomposite serpentine microarray exhibits good linearity. The sensitivity of the test technology is 1.6%Ω / ℃, and the linearity and correlation factor are 2.0% and 0.995, respectively. The humidity sensor electrode has a sensitivity of 6.568nF / RH% in a high-humidity environment, a hysteresis of 5.19%, and a good response recovery time.

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
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