Alkyl succinic anhydride modified phosphate amine salt ionic liquid, preparation method thereof and application of alkyl succinic anhydride modified phosphate amine salt ionic liquid in hydraulic oil and gear oil

Abstract

The invention belongs to the technical field of lubricating materials, and particularly relates to alkyl butanedioic anhydride modified phosphate amine salt ionic liquid, a preparation method thereof and application of the alkyl butanedioic anhydride modified phosphate amine salt ionic liquid in hydraulic oil and gear oil. Long straight-chain alkyl succinic anhydride is introduced into the phosphate amine salt ionic liquid, and a dicarboxylic acid amide structure and metal or metal ions have extremely high affinity or chelation, so that on one hand, the adsorption performance of the phosphate amine salt ionic liquid on the metal surface can be further enhanced; the phosphate amine salt ionic liquid can generate competitive adsorption with a high-activity sulfur-containing additive in gear oil, part of the sulfur-containing additive is inhibited from reacting with a metal surface, in addition, a long straight-chain alkyl structure is inserted into an adsorption layer, so that an original boundary adsorption film of the phosphate amine salt ionic liquid is tighter and thicker, an obvious antifriction effect is achieved, and the service life of the phosphate amine salt ionic liquid is prolonged. And the formation of micro pitting corrosion can be inhibited. On the other hand, metal ions generated when the zinc-containing hydraulic oil makes contact with water can be chelated on the basis of the strong chelation effect of a dicarboxylic acid amide structure and the metal ions, meanwhile, the solubilizing capacity of surface micelles can be improved through introduced long straight-chain hydrophobic groups, and therefore oil sludge generated when the zinc-containing hydraulic oil makes contact with water is inhibited; therefore, the filtering performance of the zinc-containing hydraulic oil is improved.

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