Preparation method of graphene-metal composite nanofluid
A nanofluid and metal composite technology, applied in the field of nanofluid chemical materials, to achieve the effects of preventing sedimentation, stable dispersion, and good thermal stability
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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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