A kind of composite lubricating composition and lubricating material

Abstract

The invention provides a composite lubricating composition and a lubricating material. The components of the composite lubricating composition are liquid crystal molecules with a rod-like molecular structure and β-diketone. The structural formula of the β-diketone is shown in (1) , in formula (1), R 1 for C m h 2m+1 、C m h 2m OCH 3 or C m h 2m+1 COOCH 3 , R 2 for C n h 2n+1 、C n h 2n OCH 3 or C n h 2n+ 1 COOCH 3 , where m and n are positive integers. The technical scheme of the present invention utilizes the molecular characteristics of liquid crystal molecules with a rod-like molecular structure and β-diketone, and the two mix to produce a synergistic effect; when used for lubricating the steel surface, the combination of mixing the two without shearing High viscosity and good load-carrying capacity; under shearing conditions, the rod-shaped liquid crystal molecules and β-diketones are arranged in the horizontal direction, which reduces the viscosity and shear resistance, and can achieve super slippery under a wider range of working conditions .

Description

technical field [0001] The invention belongs to the technical field of lubricating materials, in particular to a composite lubricating composition and lubricating materials. Background technique [0002] Liquid crystal lubricant is a new type of lubricating material, which can simultaneously have high load-carrying capacity and low shear resistance through molecular orientation, so as to achieve controllable rheological and tribological properties. Generally speaking, the molecular orientation of liquid crystal materials can be realized in two ways. One is to cause the orderly arrangement of liquid crystal molecules through an external electric field or magnetic field, but when this method is used in a non-charged or magnetic environment, the liquid crystal molecules will lose this characteristic. Another way is to use a surfactant on the surface of the friction pair in advance as an alignment layer to induce the orientation of the liquid crystal molecules, but because wear...

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Problems solved by technology

One is to cause the orderly arrangement of liquid crystal molecules by applying an electric field or magnetic field, but when this method is used in a non-charged or magnetic environment, the liquid crystal molecules will lose this characteristic

Another way is to use a surfactant on the surface of the friction pair in advance as an alignment layer to induce the orientation of the liquid crystal molecules, but because wear is generally unavoidable during the friction process, and the surfactant layer will shrink as the friction movement time increases. Gradual damage will eventually lead to the disappearance of liquid crystal alignment ability, so it has no lubricating effect

In addition, existing studies have shown that molecules with a rod-like non-liquid crystal structure have a certain orientation ability under the condition of forming a chemical adsorption layer on the surface, but because the intermolecular force is not strong enough, the formed molecular orientation can only be maintained at a few. A molecular layer, so it cannot form a long-range ordered structure like a real liquid crystal molecule, so its carrying capacity is limited, and the range of ultra-slippery conditions that can be achieved is narrow.

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