Preparation method of graphene-metal composite nanofluid

A nano-fluid and metal composite technology is applied in the field of nano-fluid chemical materials to achieve the effects of good thermal stability, simple preparation method and increased suspension amount

Active Publication Date: 2021-08-31
WEIFANG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a preparation method of graphene-metal composite nanofluid, the prepared graphene-metal composite nanofluid can exist stably for a long time, effectively prevent the settlement caused by the agglomeration of composite nanomaterials, improve the thermal conductivity, Good thermal stability, effectively solve the problem of micro-pipeline blockage in the application process, the method is simple and easy to promote

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] The preparation method of described graphene-gold composite nanofluid comprises the following steps:

[0045] (1) Synthesis of quaternary ammonium salt-type gemini surfactant 12-4-12: 10.8g of 1,4-dibromobutane, 23.4g of N-dodecyl-N,N-dimethyl tertiary amine Mix it with 40mL of isopropanol solvent, put it into a 250mL round-bottomed flask, and heat to reflux at 85°C for 24 hours. Washing with anhydrous ether and vacuum drying at 40°C to prepare butane-1,4(N-dodecyl-N,N-dimethyl)ammonium bromide, namely [12-4-12]2Br - ;

[0046] (2) Preparation of graphene oxide (GO): Put 1g of graphite powder, 5mL of concentrated sulfuric acid, 1g of potassium dichromate and 1g of phosphorus pentoxide into a clean flask, stir magnetically, and place in an oil bath at 80°C Heating for 6 hours, after the reaction is over, add 200mL of water to dilute, and let it stand for 24 hours; then filter the crude product, wash it with deionized water until neutral, and dry the solid crude product...

Embodiment 2

[0053] The preparation method of described graphene-gold composite nanofluid comprises the following steps:

[0054] (1) Synthesis of quaternary ammonium salt-type gemini surfactant 16-6-16: 12.2g of 1,6-dibromohexane, 29.6g of N-hexadecyl-N,N-dimethyl tertiary amine Mix it with 40mL of isopropanol solvent, put it into a 250mL round-bottomed flask, and heat to reflux at 85°C for 24 hours. Washing with anhydrous ether and vacuum drying at 40°C to prepare hexane-1,6(N-hexadecyl-N,N-dimethyl)ammonium bromide, namely [16-6-16]2Br - ;

[0055] (2) Preparation of graphene oxide (GO): Put 1g of graphite powder, 5mL of concentrated sulfuric acid, 1g of potassium dichromate and 1g of phosphorus pentoxide into a clean flask, stir magnetically, and place in an oil bath at 80°C Heating for 6 hours, after the reaction is over, add 200mL of water to dilute, and let it stand for 24 hours; then filter the crude product, wash it with deionized water until neutral, and dry the solid crude pro...

Embodiment 3

[0062] The preparation method of described graphene-gold composite nanofluid comprises the following steps:

[0063] (1) Synthesis of quaternary ammonium salt-type gemini surfactant 14-2-14: 9.4g of 1,2-dibromoethane, 26.5g of N-tetradecyl-N,N-dimethyl tertiary amine Mix it with 40mL of isopropanol solvent, put it into a 250mL round-bottomed flask, and heat to reflux at 85°C for 24 hours. Washing with anhydrous ether and vacuum drying at 40°C to prepare ethane-1,2(N-tetradecyl-N,N-dimethyl)ammonium bromide, namely [14-2-14]2Br - ;

[0064] (2) Preparation of graphene oxide (GO): Put 1g of graphite powder, 5mL of concentrated sulfuric acid, 1g of potassium dichromate and 1g of phosphorus pentoxide into a clean flask, stir magnetically, and place in an oil bath at 80°C Heating for 6 hours, after the reaction is over, add 200mL of water to dilute, and let it stand for 24 hours; then filter the crude product, wash it with deionized water until neutral, and dry the solid crude pr...

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Abstract

The invention belongs to the technical field of nanofluid chemical materials, and particularly relates to a preparation method of graphene-metal composite nanofluid. The preparation method of the graphene-metal composite nanofluid comprises the steps that an m-s-m type gemini surfactant solution is synthesized, then a graphene oxide and a metal precursor are modified with an m-s-m type gemini surfactant, and finally two mixed solutions are mixed to react, so that the graphene-metal composite nanofluid is obtained. According to the provided preparation method of the graphene-metal composite nanofluid, the prepared graphene-metal composite nanofluid can stably exist for a long time, sedimentation caused by agglomeration of a composite nanomaterial is effectively avoided, the heat conductivity coefficient is increased, the heat stability is good, the problem that a micro-pipeline is blocked in the application process is effectively solved, and the method is simple and easy to popularize.

Description

technical field [0001] The invention belongs to the technical field of nanofluid chemical materials, and in particular relates to a preparation method of graphene-metal composite nanofluid. Background technique [0002] Nanofluid is an innovative nanotechnology in the field of heat transfer. Nanofluid shows the advantages of higher stability, better rheological properties and higher thermal conductivity. Composite nanofluid is the combination of two or more different types It is prepared by suspending the combination of nanomaterials in water and other base fluids. It combines the physical and chemical properties of different nanomaterials and works in a uniformly dispersed fluid. The composite nanofluid exhibits better heat transfer performance and thermophysical properties. [0003] The Hummers method is a method for producing reduced graphene oxide through oxidation-exfoliation-reduction. This method has good timeliness and safe preparation process. Graphene nanosheets ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00B22F9/24B82Y30/00B82Y40/00C01B32/184
CPCB22F9/24C01B32/184B82Y30/00B82Y40/00B22F1/105B22F1/107
Inventor 李丹吴倩王林同宋明君孙晓日
Owner WEIFANG UNIVERSITY
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