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Graphene-polydopamine-copper nano-composite material and preparation method thereof

A technology of polydopamine and composite materials, which is applied in the petroleum industry, lubricating compositions, additives, etc., can solve the problems of complex preparation process, difficult operation, and easy oxidation of nano-copper, and achieve the effect of improving tribological properties and preventing oxidation

Inactive Publication Date: 2017-09-15
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] To sum up, in the practical application of the existing technology in industrial production, the preparation process is complex, difficult to operate, the prepared nano-copper is easily oxidized, the dispersion of copper nanoparticles on the surface of graphene is uneven, and the tribological properties need to be improved.

Method used

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  • Graphene-polydopamine-copper nano-composite material and preparation method thereof
  • Graphene-polydopamine-copper nano-composite material and preparation method thereof
  • Graphene-polydopamine-copper nano-composite material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0025] Step 1, preparation of graphene-polydopamine composite material: Weigh 0.02g of graphene and add it to 200ml of Tris-Hcl buffer solution with PH=8.5, ultrasonically disperse evenly to obtain mixed solution 1, then add 0.4g of dopamine and stir for 24h, A black precipitate was obtained, which was cleaned with distilled water and freeze-dried for 18 hours to obtain a graphene / polydopamine composite material.

[0026] Step 2, prepare graphene-polydopamine-copper nanocomposite material: take 0.005g of the above-mentioned graphene-polydopamine composite material, fully dissolve it in 50ml ethanol solution, and disperse it uniformly by ultrasonic to obtain mixed solution 3, in mixed solution 3 Add 0.05 g of copper acetate and stir evenly. After standing for 12 hours, pour off the supernatant and reconfigure it into a 50 ml solution to obtain mixed solution 4;

[0027] Step 3, dissolving 0.0447 g of sodium hypophosphite into 20 ml of ethanol solution; heating the solution 4 in...

Embodiment 2

[0032] Step 1, preparing graphene-polydopamine composite material: Weigh 0.05g of graphene and add it to 200ml of Tris-Hcl buffer solution with pH=8.5, ultrasonically disperse evenly to obtain mixed solution 1, then add 0.8g of dopamine and stir for 12h, A black precipitate was obtained, which was cleaned with distilled water and freeze-dried for 24 hours to obtain a graphene / polydopamine composite material.

[0033] Step 2, preparing graphene-polydopamine-copper nanocomposite material: take 0.01g of the above-mentioned graphene-polydopamine composite material, fully dissolve it in 50ml ethanol solution, and disperse it uniformly by ultrasonic to obtain mixed solution 3, in mixed solution 3 Add 0.425g of copper chloride and stir evenly, after standing for 12h, pour off the supernatant, and reconfigure it into a 50ml solution to obtain mixed solution 4;

[0034] Step 3, dissolving 0.53 g of sodium hypophosphite into 50 ml of ethanol solution; heating the solution 4 in a water b...

Embodiment 3

[0037] Step 1, preparation of graphene-polydopamine composite material: Weigh 0.1g of graphene and add it to 200ml of Tris-Hcl buffer solution with PH=8.5, ultrasonically disperse evenly to obtain mixed solution 1, then add 0.4g of dopamine and stir for 12h, A black precipitate was obtained, which was cleaned with distilled water and freeze-dried for 24 hours to obtain a graphene / polydopamine composite material.

[0038] Step 2, prepare graphene-polydopamine-copper nanocomposite material: take 0.005 of the above-mentioned graphene-polydopamine composite material, fully dissolve it in 50ml ethanol solution, and ultrasonically disperse evenly to obtain mixed solution 3, and add in mixed solution 3 0.08g of copper sulfate and stir evenly, after standing for 12h, pour off the supernatant, and reconfigure it into a 50ml solution to obtain mixed solution 4;

[0039] Step 3, dissolving 0.106 g of sodium hypophosphite into 50 ml of ethanol solution; heating the solution 4 in a water bat...

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Abstract

The invention discloses a graphene-polydopamine-copper nano-composite material and a preparation method thereof, and belongs to the field of nano-inorganic functional materials. The method includes the steps: taking graphene as a raw material, and enabling dopamine to automatically polymerize in buffer solution to prepare a graphene / polydopamine composite material; taking prepared graphene / polydopamine as a raw material, performing uniform dispersion in ethanol solution, adding copper salt, enabling mixture and reducing agents to react for 10-20min at the water bath temperature of 80 DEG C, performing centrifugal washing and drying to obtain the graphene / polydopamine / copper nano-composite material. According to the method, the dopamine serves as a modifying agent, so that the surface of the graphene is modified, copper nano-particles are uniformly dispersed on the surface of the graphene and directly reduced in the solution by the aid of the reducing agents, oxidation of the copper nano-particles can be effectively prevented, the preparation method is simple, and the obtained graphene / polydopamine / copper nano-composite material easily forms transfer films, has the functions of resisting abrasion and reducing friction and can serve as an effective lubricating additive.

Description

technical field [0001] The invention relates to a graphene / polydopamine / copper nano composite material and a preparation method thereof, belonging to the field of nano inorganic functional materials. Background technique [0002] Graphene, a planar two-dimensional monolayer of carbon atoms, has attracted interest over the past decade due to its novel electrical, catalytic, thermal, and mechanical properties. Due to its small size and very thin layered structure, graphene easily forms a transfer film during the friction process to prevent direct contact between the two friction surfaces, thereby reducing friction and wear during the friction process. Therefore, in the field of tribology, graphene and its derivatives are considered to be excellent solid lubricants or nano additives. However, due to the lack of surface functional groups, graphene is difficult to disperse uniformly in organic solvents, so it is difficult to form an effective bond with the polymer matrix, which ...

Claims

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Application Information

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IPC IPC(8): C10M161/00B22F9/24C10N30/06
CPCB22F9/24C10M161/00C10M2201/041C10M2201/05C10M2201/14C10M2217/046C10N2030/06
Inventor 王彪宋浩杰李璐莹王志强盛维琛
Owner JIANGSU UNIV
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