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Transparent paper-based gas sensor as well as preparation method and application thereof

A gas sensor, transparent paper technology, applied in instruments, scientific instruments, measuring devices, etc., can solve the problems of large surface roughness, complicated preparation process, lack of transparency, etc., achieving simple preparation process, broad application prospects, and realization of devices. the effect of

Inactive Publication Date: 2021-03-16
GUANGDONG PROV MEDICAL INSTR INST
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Problems solved by technology

However, the transparency of paper prepared by these methods is generally less than 80%, and the surface roughness of paper is still high, which cannot meet the requirements for preparing electronic devices.
[0003] At present, there are reports in the literature that transparent electronic skins (sensors) have been prepared for monitoring human biological signals (bending, stretching, pressure, humidity, and exhaled air, etc.), but they are all prepared on the surface of PET plastic substrates, which not only cannot meet the requirements of porous air permeability. , can not achieve better biocompatibility
There are also related literature reports that using paper as the substrate to prepare paper-based gas sensors can not only be used for respiratory medical diagnosis, but also for other applications. However, due to the large surface roughness of ordinary paper, the surface needs to be further treated before use. , making the preparation process too complicated and not transparent

Method used

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  • Transparent paper-based gas sensor as well as preparation method and application thereof
  • Transparent paper-based gas sensor as well as preparation method and application thereof
  • Transparent paper-based gas sensor as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047]Preparation of nanocellulose transparent paper: First, soak 5g of dry pulp board for beating and beating, add a certain amount of water to adjust the concentration, and continue stirring until the plant fibers are fully dispersed, and the concentration of the slurry is 1wt%. Meanwhile, NaBr and TEMPO reagent (catalyst) were weighed and dissolved in distilled water for use. The prepared catalyst was poured into the thick slurry with constant stirring, followed by the addition of sodium hypochlorite. The dosage of NaBr is 1 mmol, the dosage of TEMPO reagent is 0.1 mmol, and the dosage of sodium hypochlorite is 8 mmol. The entire reaction process is carried out in a constant temperature water bath at 30 °C, and the pH value will gradually decrease during the reaction process. Use 0.1mol / L sodium hydroxide solution to adjust the pH value to about 10, until the final pH change value is as small as 0.01 per minute, Then add absolute ethanol to terminate the experiment. Wash ...

Embodiment 2

[0051] The preparation method of the nanocellulose transparent paper in this example is the same as that in Example 1.

[0052] refer to figure 1 , using nanocellulose paper as the transparent paper base substrate, through the method of screen printing, the conductive silver paste is printed on the paper base to print interdigital electrodes, the size of the interdigital electrodes is 0.4 × 0.3 cm, and then placed in an oven at 60 ℃ After curing for 30 minutes, a transparent paper base layer formed with a conductive electrode layer was obtained.

[0053] Take 0.01g of ZnO quantum dots and 0.01g of graphene composite material, ultrasonically mix them in 1mL of absolute ethanol, and then print them on the interdigital electrode to form a gas-sensing layer. The transparent paper-based gas sensor of this example is prepared.

Embodiment 3

[0055] The preparation method of the nanocellulose transparent paper in this example is the same as that in Example 1.

[0056] refer to figure 1 , using nanocellulose paper as the transparent paper base substrate, through the method of screen printing, the conductive silver paste is printed on the paper base to print interdigital electrodes, the size of the interdigital electrodes is 0.4 × 0.3 cm, and then placed in an oven at 60 ℃ After curing for 30 minutes, a transparent paper base layer formed with a conductive electrode layer was obtained.

[0057] Take 0.01 g of reduced graphene oxide, ultrasonically mix it in 1 mL of absolute ethanol, and then print it on the interdigital electrode to form a gas sensing layer, and the transparent paper-based gas sensor of this example is prepared.

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Abstract

The invention provides a transparent paper-based gas sensor as well as a preparation method and application thereof. The transparent paper-based gas sensor comprises a transparent paper-based substrate, a conductive electrode layer and a gas-sensitive sensing layer which are sequentially stacked, wherein the transparent paper-based substrate is nano-crystalline cellulose paper. The transparent paper-based gas sensor is prepared by taking nano cellulose as the transparent paper-based substrate, the preparation process is simple, the sensitivity of the sensor is high, the flexible paper-based gas sensor is realized to be a device, and the application prospect is wide.

Description

technical field [0001] The invention belongs to the technical field of sensing electronic devices, and in particular relates to a transparent paper-based gas sensor and a preparation method and application thereof. Background technique [0002] Paper is a very common renewable green and environmentally friendly material in daily life. Compared with plastics, metals and ceramics, it has the characteristics of low cost, renewable, degradable, flexible and easy to print. With the increasingly rapid development of flexible electronic devices, paper-based electronic devices have received extensive attention from the outside world, because it can meet the requirements of cost reduction, easy printing, and mass production. Therefore, a large variety of paper-based electronic devices are continuously being researched and designed, such as displays, diodes, antennas, capacitors, sensors, and solar cells. However, due to the porous nature of the fiber network structure of ordinary pa...

Claims

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Application Information

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IPC IPC(8): G01N27/12
CPCG01N27/127
Inventor 刘海信龚尧邹丽丽陈龙胜
Owner GUANGDONG PROV MEDICAL INSTR INST
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