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A kind of edge functionalized graphene, its preparation method and the purposes for preparing anticorrosion coating

An anti-corrosion coating, graphene technology, applied in anti-corrosion coatings, chemical instruments and methods, epoxy resin coatings, etc., can solve problems such as restricting the application of graphene, irreparable, etc., to achieve excellent anti-corrosion characteristics, complete lamellar structure, Handleable effects

Active Publication Date: 2018-09-21
THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as mentioned above, even after various reduction treatments, the graphene oxide sheet itself has a large number of irreparable defects or holes, which greatly restricts the application of graphene in preventing the diffusion and penetration of gas or liquid molecules.

Method used

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  • A kind of edge functionalized graphene, its preparation method and the purposes for preparing anticorrosion coating
  • A kind of edge functionalized graphene, its preparation method and the purposes for preparing anticorrosion coating
  • A kind of edge functionalized graphene, its preparation method and the purposes for preparing anticorrosion coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] (1) Add 300 mg of graphene prepared by turbulent flow method to 200ml H 2 SO 4 (98%), 1.8g NaClO 3 And 1mlH 2 O 2 (30%) in a mixed system, stirring at room temperature (25°C) for 8 hours, and then repeating centrifugal washing of the product to obtain edge-functionalized graphene with carboxyl groups selectively modifying the edges of the sheet.

[0052] (2) Weigh 2.5mg of edge-functionalized graphene, 300mg of phenolic resin, 40mg of gypsum powder filler, 20mg of polyacrylic acid additives and 30mg of p-toluenesulfonic acid curing agent, dispersed in 100ml of water, and mechanically stirred for 5 hours to obtain edge-functionalized graphene Composite anticorrosive coating.

[0053] The coating is applied to the surface of the substrate by spraying, and after drying, the edge-functionalized graphene composite anticorrosive coating is obtained.

[0054] figure 1 with figure 2 TEM pictures and carbon Raman spectra of edge-functionalized graphene, showing its structural integrit...

Embodiment 2

[0058] (1) Add 1000 mg of graphene prepared by turbulent flow method to 200ml H 2 SO 4 (98%), 1.8g NaClO 3 And 0.04ml H 2 O 2 (30%) in a mixed system, stirred at 15°C for 4h, and then the product was repeatedly centrifuged and washed with water to obtain edge-functionalized graphene with carboxyl groups selectively modified at the edge of the sheet.

[0059] (2) Weigh 5mg edge-functionalized graphene, 60mg epoxy resin, 8mg talc filler, 10mg tributyl phosphate additive and 5mg m-phenylenediamine curing agent and disperse it in 80ml N-methylpyrrolidone. After 5h mechanical Stir to obtain edge functionalized graphene composite anticorrosive coating.

[0060] The coating is applied to the surface of the substrate by spraying, and after drying, the edge-functionalized graphene composite anticorrosive coating is obtained.

[0061] Table 1 shows that the edge-functionalized graphene anticorrosive coating of this embodiment has excellent corrosion resistance.

Embodiment 3

[0063] (1) Add 200 mg of graphene prepared by mechanical exfoliation to 10 ml of H 2 SO 4 (98%), 2g KClO 3 And 0.01ml H 2 O 2 (30%) in a mixed system, stirred at 0°C for 10 hours, and then the product was repeatedly centrifuged and washed with water to obtain edge-functionalized graphene with carboxyl groups selectively modified at the edge of the sheet.

[0064] (2) Weigh 70 mg of edge-functionalized graphene and disperse it in 30 ml of water, and stir it evenly for 1 hour to obtain edge-functionalized graphene one-component anticorrosive coating.

[0065] It is applied to the surface of the substrate by brushing, and after drying, the edge-functionalized graphene single-component anticorrosive coating is obtained.

[0066] Table 1 shows that the edge-functionalized graphene anticorrosive coating of this embodiment has excellent corrosion resistance.

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Abstract

The invention belongs to the field of graphene functionalization and application, and relates to an edge functionalized graphene, a preparation method thereof, and applications of the edge functionalized graphene in preparing anticorrosive paint According to the preparation method, a chlorate-concentrated sulfuric acid-hydrogen peroxide system is adopted for functionalization of graphene so as to obtain the edge functionalized graphene, wherein carboxy groups are connected with the lamina edges of a whole structure via selective modification; the edge functionalized graphene is subjected to film formation alone, or is combined with an anticorrosive paint formula component for composite film formation so as to obtain the edge functionalized graphene anticorrosive paint. The preparation method is simple, is high in efficiency, is capable of solving problems that graphene is difficult to treat, and stacking is easily caused, providing graphene solution with processibility and treatability, avoiding destroying of the graphene lamellar structure, and maintaining the graphene lamellar structure and the characteristics; the obtained edge functionalized graphene anticorrosive paint possesses excellent corrosion resistance; and application range is wide.

Description

Technical field [0001] The invention belongs to the functionalization and application field of graphene, relates to an edge-functionalized graphene, its preparation method and its use for preparing anti-corrosion coatings, in particular to a carboxyl group selectively modified in a complete graphene sheet Edge functionalized graphene of the edge, its preparation method and use for preparing edge functionalized graphene anticorrosive coating. Background technique [0002] Since its discovery in 2004, graphene has attracted much attention as a new type of carbon material. Graphene materials can be widely used in high-performance nanoelectronic devices, optoelectronic devices, gas sensors, composite materials, field emission materials, and energy storage. In view of the difficult dispersion of graphene and the difficulty of stacking between the layers, the functional modification of graphene has broadened the industrial application potential of graphene. Graphene oxide (GO) is the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09C1/46C09C3/06C09D161/06C09D163/00C09D1/00C09D175/14C09D5/08C09D7/62
CPCC01P2006/22C08K3/04C08K9/02C09C1/46C09C3/06C09D1/00C09D5/08C09D7/62C09D161/06C09D163/00C09D175/14C08L33/02C08L1/286Y02P20/54
Inventor 李祥龙苗中正智林杰
Owner THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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