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Method for inhibiting oxidation of MXene nano material and application of MXene nano material in anticorrosive paint

A nanomaterial and nanosheet technology, applied in anti-corrosion coatings and other directions, can solve problems such as weakening and affecting material properties, and achieve the effect of preventing oxidation and degradation and improving oxidation conditions.

Active Publication Date: 2022-08-05
INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the two-dimensional structure of MXene with a large surface area, an important feature to achieve high barrier properties in anti-corrosion nanocomposite polymer coatings, can be greatly weakened by oxidation reactions.
[0005] Although, at present, the oxidation of MXene nanosheets can be suppressed by removing dissolved oxygen as the main oxidation source, controlling the storage time of MXene in an inert atmosphere, or storing at a lower temperature, once put into use, MXene nanomaterials still remain Rapid oxidative decomposition can occur, affecting the properties of its material
Therefore, there are still some challenges in the application of stable MXene nanomaterials in polymer coatings.

Method used

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  • Method for inhibiting oxidation of MXene nano material and application of MXene nano material in anticorrosive paint
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  • Method for inhibiting oxidation of MXene nano material and application of MXene nano material in anticorrosive paint

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Experimental program
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Effect test

Embodiment 1

[0043] Fresh MXene nanosheets (transmission electron microscopy images such as figure 1 As shown in (a), by dispersing 0.5g MXene in 95mL:5mL toluene:3-aminopropyltriethoxysilane solution and stirring continuously at 80°C for 12h under reflux system, silane-functionalized MXene nanoparticles were obtained Materials (F-MXene) such as figure 1 (b).

[0044] Take 0.1 g of the silane-functionalized MXene nanosheets obtained above and add it to 40 g of epoxy resin (MU-618) by solution mixing, stir vigorously for 30 min at room temperature and fully disperse, and then mix with 20 g of curing agent (CU-600). , to obtain a uniformly dispersed nanocomposite coating (Epoxy / F-MXene).

[0045] The above epoxy resin is epoxy resin (MU-618) and curing agent (CU-600), which were purchased from Shanghai Runtan New Material Technology Co., Ltd.

[0046] The nanocomposite coating obtained above was coated with a paint brush on a Q235 steel substrate, cured at room temperature for 72 hours, t...

Embodiment 2

[0050] 50 mL of graphene oxide (GO) (10 mg / mL) was mixed with 20 mL of ethanol, mixed and sonicated in a water bath for 60 min. Then, 50 mL of fresh MXene aqueous solution (10 mg / mL) was added to the mixture, and the mixture was magnetically stirred at room temperature for 1 h. The resulting mixture was transferred to a 200 mL Teflon-lined autoclave and heated at 120 °C for 4 hours. Finally, the resulting solution was centrifuged and washed several times with water and ethanol, and freeze-dried to obtain the nanohybrid (GO@MXene), as shown in image 3 (a).

[0051] Silane functionalization was performed by refluxing 0.5 g of the nanohybrid in a mixture of 3-aminopropyltriethoxysilane (5 mL) and deionized water (95 mL) at 80 °C for 12 h. The refluxed product was washed several times with absolute ethanol and deionized water, and finally freeze-dried to obtain the modified nanohybrid (F-GO@MXene), such as image 3 shown.

[0052] Depend on image 3 (a) As shown in the figur...

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Abstract

The invention relates to an anti-corrosion nano-filler, in particular to a method for inhibiting oxidation of an MXene nano-material and application of an obtained stable material serving as the anti-corrosion nano-filler in a polymer coating. A protective layer is formed on the surface of the MXene nanosheet, so that the complete two-dimensional sheet structure of the MXene nanomaterial is maintained, and oxidation is inhibited. The obtained non-oxidation MXene nanosheet with a defect-free and sheet-shaped structure is used as an anti-corrosion nano filler in a polymer coating so as to develop a long-term anti-corrosion coating on a metal structure. Therefore, oxidation of the MXene nanosheets is inhibited through covalent functionalization with alkoxy silane or hybridization with the graphene-based nanomaterial, and meanwhile, the dispersion quality of the MXene nanosheets in a polymer matrix is improved. The modified MXene-based nanosheet is used as a nanofiller in a polymer coating, and can exert long-acting corrosion resistance in a polymer matrix.

Description

technical field [0001] The invention relates to anti-corrosion nano-fillers, in particular to a method for inhibiting the oxidation of MXene nano-materials and the application of obtaining stable materials as anti-corrosion nano-fillers in polymer coatings. Background technique [0002] MXene is a two-dimensional transition metal carbide, nitride or carbonitride with the general chemical formula M n+1 AX n (n=1, 2, 3), as the MAX phase, where M is a transition metal (eg, titanium), A is a IIIA or IV main group element (eg, aluminum), and X is a carbon or nitrogen atom. MXenes can be synthesized by chemically etching the "A" element in compounds of the MAX phase crystal structure. As a result of this process, the MAX phase will recrystallize into 3D M n+1 X n , by vigorous stirring and centrifugation, will be converted into exfoliated 2D sheet-like morphology and hexagonal crystallinity of MXene. [0003] MXene nanosheets have the potential to develop anti-corrosion nano...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D5/08
CPCC09D5/08C08K9/06C08K9/10C08K3/14C08K3/28C08K2201/011
Inventor 段继周周子扬塞皮德·波哈森董续成孙佳文侯保荣
Owner INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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