Edge functionalized graphene, preparation method thereof, and applications of edge functionalized graphene in preparing anticorrosive paint

A technology of anti-corrosion coatings and graphene, applied in anti-corrosion coatings, chemical instruments and methods, epoxy resin coatings, etc., can solve the problems that restrict the application of graphene and cannot be repaired, and achieve excellent anti-corrosion properties, complete sheet structure, The effect of excellent physical and chemical properties

Active Publication Date: 2017-01-04
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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  • Edge functionalized graphene, preparation method thereof, and applications of edge functionalized graphene in preparing anticorrosive paint
  • Edge functionalized graphene, preparation method thereof, and applications of edge functionalized graphene in preparing anticorrosive paint
  • Edge functionalized graphene, preparation method thereof, and applications of edge functionalized graphene in preparing anticorrosive paint

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] (1) Graphene prepared by 300 mg turbulent flow method is added to 200ml H 2 SO 4 (98%), 1.8g NaClO 3 and 1mlH 2 o 2 (30%) in a mixed system, stirred at room temperature (25° C.) for 8 h, and then the product was repeatedly centrifuged and washed with water to obtain edge-functionalized graphene with carboxyl groups selectively modifying the edge 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 additive and 30mg of p-toluenesulfonic acid curing agent and disperse them in 100ml of water, and obtain edge-functionalized graphene after 5 hours of mechanical stirring Composite anti-corrosion coating.

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

[0054] figure 1 and figure 2 Transmission electron micrograph and carbon Raman spectrum of edge-functiona...

Embodiment 2

[0058] (1) Graphene prepared by 1000 milligrams of turbulent flow method is added 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 4 h, and then the product was repeatedly centrifuged and washed with water, thereby obtaining edge-functionalized graphene with carboxyl groups selectively modifying the edge of the sheet.

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

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

[0061] Table 1 shows that the edge-functionalized graphene anticorrosion coating of the present embodiment has excellen...

Embodiment 3

[0063] (1) 200 milligrams of graphene prepared by mechanical exfoliation method are added to 10ml 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 h, and then the product was repeatedly centrifuged and washed with water to obtain edge-functionalized graphene with carboxyl groups selectively modifying the edge of the sheet.

[0064] (2) Weigh 70 mg of edge-functionalized graphene and disperse it in 30 ml of water, and mechanically stir for 1 hour to obtain a single-component anti-corrosion coating with edge-functionalized graphene.

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

[0066] Table 1 shows that the edge-functionalized graphene anticorrosion coating of the present 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 field of functionalization and application of graphene, relates to a kind of edge functionalized graphene, its preparation method and the application for preparing anti-corrosion coating, especially relates to a kind of carboxyl group selective modification in complete graphene sheet Edge-functionalized graphene on the edge of , a preparation method thereof and use for preparing an edge-functionalized graphene anticorrosion 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 sheets, the functional modification of graphene has broadened the industrial application potent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/46C09C3/06C09D161/06C09D163/00C09D1/00C09D175/14C09D5/08C09D7/12
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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