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Graphene RFID tag and preparation method and application thereof

A technology of graphene and conductive paste, applied in the field of radio frequency identification, can solve the problems of easy damage of labels, poor mechanical, chemical and thermal stability of metal labels, etc., and achieve the effect of superior conductivity, high dispersion performance and stability

Pending Publication Date: 2022-06-07
广州优刻谷科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] RFID antennas are generally made of metal materials such as copper and aluminum. The mechanical, chemical and thermal stability of metal tags is poor, so the tags are easily damaged in the actual application of the Internet of Things, and electronic waste is also generated

Method used

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  • Graphene RFID tag and preparation method and application thereof
  • Graphene RFID tag and preparation method and application thereof
  • Graphene RFID tag and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Example 1 Preparation of graphene conductive paste

[0049] 1. Preparation of graphene:

[0050] Concentrated sulfuric acid and concentrated phosphoric acid were mixed in an 8:1 volume ratio and immersed in an ice-water bath to cool. Then, the natural flake graphite and potassium permanganate were mixed uniformly at a weight ratio of 1:3, poured into the mixed acid, stirred and reacted for 2 hours, removed from the ice bath, and reacted in a water bath at 45 °C for 30 minutes. After that, it was moved into the ice bath again, and deionized water equal to the volume of concentrated sulfuric acid was added dropwise with stirring. After the reaction, 3% hydrogen peroxide solution was added until the liquid changed from tan to pale yellow and no gas was produced. After centrifugation, removing the supernatant, adding the same volume of deionized water, ultrasonic dispersion, dialysis, and drying in an oven at 70° C. to obtain flake graphite oxide.

[0051] After grinding t...

Embodiment 2

[0055] Weigh 4g of 10mg / ml graphene dispersion liquid, put it into the syringe barrel, connect it with the nozzle and install it on the three-axis CNC platform, open the air pressure control system, then fix the PET matrix on the heating plate, and use the computer to set the nozzle to move. Set the speed to 5, set the nozzle movement route, set the slurry extrusion speed to 100 microliters per minute, turn on the heating plate, set the heating plate temperature to 100 °C, and start running after the heating plate temperature rises and stabilizes at 100 °C , the graphene conductive paste is extruded from the nozzle and formed on the substrate through a screw extrusion or pneumatic pressure control system.

[0056] Put the formed antenna circuit into the ion sputtering apparatus, set the sputtering time for 5 minutes, and test the conductivity as shown in Table 1.

Embodiment 3

[0058] Weigh 4g of 20mg / ml graphene dispersion liquid, put it into the syringe barrel, connect it with the nozzle and install it on the three-axis CNC platform, open the air pressure control system, then fix the PP substrate on the heating plate, and use the computer to set the nozzle to move. Set the speed to 5, set the nozzle movement route, set the slurry extrusion speed to 100 microliters per minute, turn on the heating plate, set the heating plate temperature to 100 °C, and start running after the heating plate temperature rises and stabilizes at 100 °C , the graphene conductive paste is extruded from the nozzle and formed on the substrate through a screw extrusion or pneumatic pressure control system.

[0059] Put the formed antenna circuit into the ion sputtering apparatus, set the sputtering time for 5 minutes, and test the conductivity as shown in Table 1.

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Abstract

The invention discloses a graphene material and a preparation method thereof. The graphene material can be used for preparing conductive paste and an RFID antenna. The method is characterized in that the preparation method and the use process are green and environment-friendly; and the prepared graphene has high dispersing performance and stability, is easily and uniformly dispersed in a solvent, and is stably stored. Meanwhile, the prepared graphene is clear in lamella and excellent in conductivity, and the conductivity of the graphene is basically not affected after the graphene is dispersed. The graphene conductive paste and the multilayer ink direct writing printing technology based on the graphene conductive paste provided by the invention are environment-friendly, and can also significantly assist in improving the conductivity of a graphene RFID tag antenna. Meanwhile, the adhesive force is high, falling is not prone to occurring, toughness is good, breaking is not prone to occurring, and the service life is prolonged. And in large-scale production, the production efficiency can be effectively improved, the cost is reduced, and the time is saved.

Description

technical field [0001] The invention belongs to the technical field of radio frequency identification (Radio Frequency Identification, RFID), and more particularly, relates to a graphene RFID tag and a preparation method and application thereof. Background technique [0002] The Internet of Things (IoT) connects any object with the Internet through information sensing devices such as radio frequency identification (RFID) and positioning systems, according to the agreed protocol, for information exchange and communication, so as to realize intelligent identification and positioning. , tracking, monitoring and management. It has been widely used in various independent fields such as retail, transportation, and military. [0003] Radio frequency identification (RFID) technology is a technology that uses radio frequency (RF) waves to carry out two-way information transmission through spatial coupling to achieve intelligent target identification. Due to its strong anti-interfer...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/184H01B1/24H01Q1/22H01Q1/38
CPCC01B32/184H01B1/24H01Q1/38H01Q1/2225
Inventor 陈政霖李舸陈胜俭郑飞州
Owner 广州优刻谷科技有限公司
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