An aluminum alloy coupled bionic self-cleaning surface and its preparation method

Abstract

An aluminum alloy coupled bionic self-cleaning surface and its preparation method belong to the field of self-cleaning surface preparation. The structure is as follows from bottom to top: aluminum alloy substrate, brush coating and groove; the thickness of the brush coating is greater than 35 μm; the groove is in Fabricated on a brush-coated layer with a pitch of 100‑105 μm, a shape of 20‑25 μm in depth, and a surface contact angle of 120°‑150°. The method includes: pre-grinding the surface of the substrate and cleaning the surface; brushing the substrate; ultrasonic cleaning and deionized water cleaning in acetone; drying the surface of the substrate, heating to 200 ° C, and keeping it warm for two hours Afterwards, cool down to room temperature; laser micro-process the surface of the substrate to construct grooves with micron-scale spacing, and then clean it in ultrasonic waves of deionized water; heat-treat the surface of the substrate to 150°C for two hours and then cool to room temperature for treatment. The hydrophobicity, low surface adhesion and self-cleaning properties of the invention can be widely applied to the surfaces of various parts in the fields of automobile manufacturing, ships, chemical industry and aerospace.

Description

technical field

[0001] The invention belongs to the field of self-cleaning surface preparation, and in particular relates to an aluminum alloy coupling bionic self-cleaning surface and a preparation method thereof. Background technique

[0002] China is a big manufacturing country. China's aluminum alloy profile industry has passed the primary development stage characterized by quantity growth, and initially entered a new stage of improving product quality, enriching product categories, and relying on comprehensive capabilities to participate in market competition. However, aluminum alloys have poor ability to cope with rain and other humid environments during use, and there is no guarantee for the cleanliness of the surface, which greatly affects its service life and appearance quality.

[0003] In order to solve this series of problems, researchers turn their attention to the natural world. They found that there are many animals and plants in nature with super-hydrophobic...

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