Method for preparing graphite series nano fluid

Abstract

The invention discloses a process for preparing nanophrase fluid of graphite, which comprises graphitic oxidation, surface modification and deoxidization of graphitic oxidation with surface modification. The surface modification means that surfaces of achieved 100 parts by mass of graphitic oxidation are modified to prepare graphitic oxidation with surface modification by 1-20 parts by mass of surface modifying agent. Deoxidization of graphitic oxidation with surface modification means that nanophrase graphite with surface modification is achieved by deoxidizing 100 parts by mass of products with 1-100 parts by mass of deoxidization agent. Finally the nanophrase graphite is prepared into nanophrase fluid of graphite, which is dispersed in dispersive medium by ultraphonic wave. The process of the invention can produce nanophrase fluid with high thermal conductivity, and replace nanophrase fluid of diamond, carbon nanotubes, carbon 60 and the like. Further the process of the invention has the advantages of simple technique, low cost, rich raw materials supply, and stable products, which cause no abrasion to heat exchangers.

Description

Technical field [0001] The invention relates to a method for preparing nanofluids, in particular to a method for preparing graphite-based nanofluids by using graphite as a raw material and using an oxidation-reduction method. Background technique [0002] In industries such as electric power, metallurgy, chemical industry, air conditioning, transportation and microelectronics, the application of heat exchangers is very common. Commonly used heat exchange working fluids are water, mineral oil, glycol, etc. These working fluids have low thermal conductivity and poor heat exchange performance, and have gradually become the main obstacle to enhancing heat transfer. [0003] At room temperature, the thermal conductivity of solid materials such as copper is generally 1-3 orders of magnitude greater than that of pure fluids (at room temperature, the thermal conductivity of copper is 645 times that of water and 2655 times that of engine oil), so high thermal conductivity is added to the ...

AI Technical Summary

Problems solved by technology

Metal particles have insufficient thermal conductivity and corrosion problems; SiC, Al 2 o 3 、TiO 2 There are general thermal conductivity and wear problems on the heat exchanger; diamond, carbon nanotubes and C 60 The high cost of production severely limits their application (diamond and carbon nanotubes also have wear problems on heat exchangers)

[0004] In short, the existing production methods of nanofluids have problems such as high cost and wear of heat exchangers, and cannot meet the urgent needs of the market for high-performance nanofluids that can be produced in large quantities and at low cost.