Laser engraving preparation method and application of graphene-ceramic composite electrode array

A ceramic composite and electrode array technology, applied in the field of materials, can solve the problems of phenolic substances affecting the environment, difficult processing, unfavorable electrochemical sensor devices, etc., and achieve the effects of simple and environmentally friendly preparation process, easy industrial scale-up, and low raw material cost

Active Publication Date: 2022-03-04
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, the widely used PI material can only be used in the form of ultra-thin tape, and the cost is high; although the cost of phenolic resin material is low, its residual phenolic substances have an impact on the environment and are not conducive to the construction of low-background electrochemical Sensor devices; cellulose-based LIG precursor materials such as paper and wood are difficult to process, difficult to coat and integrate, while nitrocellulose materials need to use toxic organic solvents for dispersion and film formation, and most of these materials require atmosphere protection or multi-step processing to achieve its effective graphene
On the other hand, although plastics such as PET and PVC are widely used as film or sheet substrates for various electronic devices, previous studies have shown that these materials cannot be directly laser engraved graphene, so PET or PVC plastic sheet substrates are directly used as carbon substrates. Source LIG preparation technology has not been reported yet

Method used

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  • Laser engraving preparation method and application of graphene-ceramic composite electrode array
  • Laser engraving preparation method and application of graphene-ceramic composite electrode array
  • Laser engraving preparation method and application of graphene-ceramic composite electrode array

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] After mixing 1g of sodium montmorillonite and 2g of corn starch evenly, ball mill for 1-3 hours, add 9-15ml of water to the ball-milled mixture to make a thin paste, and use the method of scraping to form on the surface of the PET plastic sheet substrate. Uniform coating (20-30μm is acceptable), after drying at room temperature, immerse in 2mg / mL (0.5-5mg / mL is acceptable) FeCl 3 in ethanol solution for 1 min, remove it and absorb excess FeCl with filter paper 3 solution, after drying at room temperature, FeCl 3 Doped montmorillonite-starch composite coating.

[0039] Based on the three-electrode array pattern drawn by the computer, using a Diaotu laser engraving machine with a power of 3W and a wavelength of 405nm as the engraving equipment, the prepared FeCl 3The PET plastic sheet substrate covered by the doped montmorillonite-starch composite coating is placed in the engraving area, and engraved at 100% power, 50mm / s (20-100mm / s is acceptable) laser engraving rate ...

Embodiment 2

[0043] Reddish-brown refined dry pottery clay and water are mixed into a paste according to the mass ratio of 1:0.5-5, and a certain thickness of coating is formed on the surface of PVC plastic sheet substrate by dip coating method. After drying completely at room temperature or at elevated temperature, use a Wash the bottle with deionized water to remove excess clay on the surface of the coating, and after drying at room temperature or at elevated temperature, a PVC plastic sheet whose surface is evenly covered with an ultra-thin translucent clay coating is obtained, and the coating thickness is about 1 μm.

[0044] Based on the three-electrode array pattern drawn by the computer, a Diaotu laser engraving machine with a power of 3W and a wavelength of 405nm was used as the engraving equipment. / s (20-100mm / s is acceptable) laser engraving speed and engraving under air environment conditions, batch production of PVC-based graphene-ceramic composite three-electrode arrays, the r...

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Abstract

The invention belongs to the field of materials, and relates to a laser engraving preparation method of a graphene-ceramic composite electrode array and an application thereof. The laser engraving preparation method of the graphene-ceramic composite electrode array, the ceramic raw material is mixed alone or with starch and added with water to form a paste slurry, and then coated on the surface of the plastic substrate to form a coating, dried, and then laser engraved on the coating , to prepare graphene-ceramic composite electrode arrays. In the preparation method of the present invention, the coating formed by the ceramic raw material alone or with starch can absorb light to generate instantaneous high temperature during the laser engraving process, and vaporize the plastic substrate at the bottom of the coating, and after the vaporization products of these plastic substrates enter the coating, they can be The metal catalyst in the ceramic raw material is carbonized to form graphene, and the ceramic raw material itself is transformed into a ceramic under high temperature, so that a graphene-ceramic composite electrode array with certain mechanical strength and hydrophilicity is formed in situ.

Description

technical field [0001] The invention belongs to the field of materials, and relates to a laser engraving preparation method of a graphene-ceramic composite electrode array and an application thereof. Background technique [0002] Laser-induced graphene technology (LIG) can use laser to directly engrave the surface of insulating polymer film or coating to prepare graphene-based patterns or electrode arrays with high conductivity. It has the advantages of simple preparation process, high preparation precision, and suitable substrate It is widely used in supercapacitors, electrocatalysis, sensors, environmental protection and many other fields. Due to its excellent physical and chemical properties, polyimide (PI) is currently the most widely used polymer material in the field of LIG. However, the insoluble and infusible characteristics of PI materials limit its processing performance to a certain extent, and at the same time, too thick PI materials are prone to flying filament...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B33/04C04B33/13C04B33/32C04B41/85
CPCC04B33/04C04B33/13C04B33/1305C04B33/131C04B33/32C04B41/009C04B41/5093C04B41/85C04B2235/6026C04B2235/665C04B41/456
Inventor 胡成国
Owner WUHAN UNIV
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