Lubricating oil containing oleic acid-modified superparamagnetic nanometer hollow beads and preparation method thereof

Abstract

The invention specifically relates to a lubricating oil containing oleic acid-modified superparamagnetic nanometer hollow beads and a preparation method thereof, belonging to the technical field of lubricating oil. The lubricating oil comprises the following components: 1, 0.1 to 2 wt% of superparamagnetic nanometer hollow Fe3O4 beads grafted with oleic acid function groups; and 2, 98 to 99.9 wt% of three kinds of base oil. The preparation method comprises the following steps: 1, synthesizing the superparamagnetic nanometer hollow Fe3O4 beads in one step by using a solvothermal synthesis method and grafting the oleic acid function groups onto the surfaces of the superparamagnetic nanometer hollow Fe3O4 beads at the same time; 2, mixing the hollow Fe3O4 beads grafted with the oleic acid function groups and the three kinds of base oil; 3, subjecting a product obtained after previous mixing to ultrasonic dispersion; 4, carrying out high-speed shearing and dispersion on the product having undergone ultrasonic dispersion; and 5, preparing the finished lubricating oil containing the oleic acid-modified superparamagnetic nanometer hollow beads. The lubricating oil containing the oleic acid-modified superparamagnetic nanometer hollow beads have excellent resistance to friction and abrasion, high bearing capability and stable quality and produce no precipitation after long-term storage.

Description

technical field [0001] The invention relates to the technical field of lubricating oil, in particular to a lubricating oil containing oleic acid-modified superparamagnetic nano hollow microspheres and a preparation method thereof. Background technique [0002] Lubricating oil generally consists of two parts: base oil and additives. Base oil is the main component of lubricating oil, which determines the basic properties of lubricating oil. Additives can make up for and improve the performance of base oil, endow some new properties, and are an important part of lubricating oil. There are many kinds of anti-wear and anti-friction additives used in lubricating oil, but they can be roughly divided into two categories: one is oil-soluble organic compounds, which are easy to combine with lubricating oil and evenly dispersed in various lubricating oils, which can effectively change the lubrication The quality of the oil, but harmful components may be produced during the friction pr...

AI Technical Summary

Problems solved by technology

There are many kinds of anti-wear and anti-friction additives used in lubricating oil, but they can be roughly divided into two categories: one is oil-soluble organic compounds, which are easy to combine with lubricating oil and evenly dispersed in various lubricating oils, which can effectively change the lubrication The quality of the oil, but harmful components may be produced during the friction process, especially when the temperature is high, it may corrode the bearing materials of non-ferrous metals (such as silver and tin); the other type is the solid lubricant type, which is made of some Solid particles with a layered or scaled structure (such as colloidal molybdenum disulfide, graphite, polytetrafluoroethylene, etc.) and some soft metals such as Pb and Cu are uniformly dispersed in lubricating oil, but solid lubricants in lubricating oil The dispersion and stability in the system are not good, and it is easy to precipitate after long-term storage, which affects the mechanical lubrication effect and the life of the lubricating oil

[0003] About nano Fe 3 o 4 Materials have also been studied as lubricating oil additives, but due to the synthesis of nano-Fe 3 o 4 The particle shape is irregular or flake shape. After being modified and dispersed in base oil, due to its large specific surface area, high surface activity and easy aggregation, low stability, it cannot be placed for a long time, and because of its irregular shape or The shape of flakes cannot effectively improve the tribological properties of lubricating oil, and these nanomaterials are difficult to be effectively recycled

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