Preparation method of antifriction wettability patterned surface controlled by oil drop migration behavior

By preparing wedge-shaped hydrophilic patterns and self-assembled single molecular films on the surface of stainless steel, the surface tension difference force is used to resist thermal capillary force, the problem of oil deficiency in the contact area caused by thermal capillary migration of lubricating oil is solved, and the directional migration of oil droplets and the improvement of lubricating effect is achieved.

CN119703386APending Publication Date: 2025-03-28QINGDAO UNIV OF TECH
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Patent Information

Application Number
CN202411334153.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-09-24
Publication Date
2025-03-28

AI Technical Summary

Technical Problem

In the prior art, when the temperature difference inside and outside the friction contact zone is large, the problem of oil deficiency in the contact zone caused by thermal capillary migration of lubricating oil has not been effectively solved.

Method used

By preparing wedge-shaped hydrophilic patterns and self-assembled single molecular films on the surface of stainless steel, the huge surface tension difference and unbalanced surface tension difference forces are used to resist thermal capillary forces and hinder the thermal capillary migration behavior of oil droplets.

Benefits of technology

It effectively inhibits the thermal capillary migration of oil droplets, limits the oil droplets in the friction area, alleviates unnecessary wear caused by oil loss in the contact area, and realizes the directional movement of the oil droplets from the edge to the friction contact area during the thermal capillary migration.

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Abstract

The invention relates to the technical field of oil drop migration behavior control, and discloses an oil drop migration behavior controlled antifriction wettability patterned surface preparation method, which comprises: S1, carrying out polishing treatment on 50mm * 30mm * 3mm 316L stainless steel; s2, according to the step S1, the polished stainless steel sheet is sequentially washed with petroleum ether, absolute ethyl alcohol and deionized water for 10 min, and the stainless steel sheet is dried and taken out for use; s3, according to the step S2, the pretreated stainless steel sheet is subjected to self-assembly of a monomolecular film; s4, designing a wedge-shaped pattern by using CAD according to the step S3, drawing and importing the wedge-shaped pattern into a laser processing procedure, processing a wedge-shaped hydrophilic pattern by using laser, and processing the surface of the stainless steel sheet by using the laser; s5, according to the step S4, the stainless steel surface obtained after laser machining is completed is subjected to ultraviolet irradiation treatment; therefore, the wettability mode is the key for resisting the thermal capillary migration effect, and the wettability difference generated by the wettability mode plays a barrier role in the wettability mode.
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