Preparation method of perfluorotriethylamino high-heat-conducting lubricating nano-fluid

A perfluorotriethylamine, nanofluid technology, applied in lubricating compositions, heat exchange materials, chemical instruments and methods, etc., can solve the influence of dispersion stability, high chemical stability, easy to produce aggregation precipitation or agglomeration, etc. problem, to achieve the effect of solving the reunion

Inactive Publication Date: 2018-12-18
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, although graphene usually has excellent thermal conductivity and lubricating properties, since the graphene with a complete structure is composed of stable six-membered cyclobenzene-like units, the surface is inert and has high chemical stability, and the relationship between graphene sheets The strong π-π interactio

Method used

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  • Preparation method of perfluorotriethylamino high-heat-conducting lubricating nano-fluid
  • Preparation method of perfluorotriethylamino high-heat-conducting lubricating nano-fluid

Examples

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Effect test

Embodiment 1

[0072] Measure 23mL of concentrated sulfuric acid into a beaker, put the beaker in an ice bath and cool to below 4°C, weigh 1g of graphite powder and 0.5g of sodium nitrate into the beaker, turn on the ultrasound, slowly add 3g of potassium permanganate after 1h, turn off the ultrasound And start stirring, control the temperature not to exceed 10°C, and the reaction time is 2 hours in total. Move the beaker to a water bath, turn on the ultrasound, and control the temperature of the water bath at 38°C for 0.5h. Slowly add the resulting mixed solution into about 100 mL of low-temperature deionized water, then place the above mixed solution in a ~95°C water bath for 30 minutes, and keep moderate mechanical stirring during the period; after the high-temperature reaction, add 60 mL of deionized water to stop the reaction, and then add 25 mL ( 30Vol%) hydrogen peroxide, and then add 40mL (10Vol%) hydrochloric acid solution to dissolve after reacting for about 15min. Low-speed centr...

Embodiment 2

[0077] Measure 23mL of concentrated sulfuric acid into a beaker, put the beaker in an ice bath and cool to below 4°C, weigh 1g of graphite powder and 0.5g of sodium nitrate into the beaker, turn on the ultrasound, slowly add 3g of potassium permanganate after 1h, turn off the ultrasound And start stirring, control the temperature not to exceed 10°C, and the reaction time is 2 hours in total. Move the beaker to a water bath, turn on the ultrasound, and control the temperature of the water bath at 35°C for 0.5h. Slowly add the obtained mixed solution into about 100 mL of low-temperature deionized water, then place the above mixed solution in a ~90°C water bath for 60 minutes, and keep moderate mechanical stirring during the period; after the high-temperature reaction, add 60 mL of deionized water to stop the reaction, and then add 25 mL ( 30Vol%) hydrogen peroxide, after about 20min of reaction, add 40mL (10Vol%) hydrochloric acid solution to dissolve. Low-speed centrifugal was...

Embodiment 3

[0082] Measure 12mL of concentrated sulfuric acid into a beaker, put the beaker in an ice bath and cool to below 4°C, weigh 0.5g of graphite powder and 0.5g of sodium nitrate into the beaker, turn on the ultrasound, slowly add 1.5g of potassium permanganate after 1h, Turn off the ultrasound and start stirring, control the temperature not to exceed 10°C, and the total reaction time is 2h. Move the beaker to a water bath, turn on the ultrasound, and control the temperature of the water bath at 35°C for 0.5h. Slowly add the obtained mixed solution into about 50 mL of low-temperature deionized water, and then place the above mixed solution in a 95°C water bath for 30 minutes, maintaining moderate mechanical stirring; %) hydrogen peroxide, and then add 10 mL (10 Vol%) of hydrochloric acid solution to dissolve after reacting for about 15 minutes. Low-speed centrifugal washing to remove excess acid and by-products, disperse the neutral graphite oxide in water after washing, and ultras...

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Abstract

The invention provides a preparation method of perfluorotriethylamino high-heat-conducting lubricating nano-fluid and belongs to the field of preparation of a composite liquid working medium of a fluid loop system for a spacecraft. Efficient heat exchange and effective lubrication of the fluid loop system are realized through preparing fluorinated graphene-perfluorotriethylamino nano fluid; a hydrothermal method is adopted and hydrofluoric acid is used as a fluorinating reagent to carry out fluorination on graphene oxide, so as to successfully prepare multilayered fluorinated graphene; experiment equipment is relatively simple and a preparation process is easy to operate. The fluorine ratio on the surface of graphene can be controlled and adjusted. The graphene subjected to fluorination treatment has good dispersity in a perfluorotriethylamino working medium; a dispersant is not needed so that the heat resistance of a heat transferring interface can be reduced and the heat conductivityof the nano-fluid is remarkably improved. Fluorine atoms are inserted into graphene lamellas, the inter-lamellar spacing is enlarged and the acting force between layers is reduced; meanwhile, a strong repulsive force action between the fluorine atoms is very good for sliding between the layers, and the wear-reduction lubricating performance of the nano-fluid can be remarkably improved.

Description

Technical field: [0001] The invention belongs to the field of preparation of composite liquid working medium in a fluid circuit system for spacecraft; in particular, it provides a preparation method based on perfluorotriethylamine nanofluid, which is characterized in that it can uniformly disperse graphite in superhydrophobic and oleophobic liquid working medium ene nanoparticles, so as to realize the efficient heat exchange and anti-friction lubrication of liquid working fluid. Background technique: [0002] High-efficiency heat transfer is an eternal theme in the development of fluid circuit technology, and the heat transfer efficiency of heat load and heat transfer fluid directly affects the scale and performance of the system. In order to realize the development of a high-efficiency fluid circuit cooling system for spacecraft, the working medium in the mechanical pump-driven fluid circuit cooling technology is required to have a high heat transfer coefficient, which can ...

Claims

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Application Information

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IPC IPC(8): C09K5/10C10M169/04C01B32/194C10N30/06
CPCC09K5/10C10M169/04C10M2201/041C10M2215/04C10N2030/06C01B32/194
Inventor 刘金龙白明洁李成明苗建印何江魏俊俊陈良贤李振宇
Owner UNIV OF SCI & TECH BEIJING
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