Effect of bionic microtexture geometry on the tribological performance of hydrophobic surfaces
Year: 2025
Type: article
Abstract: This study intergrates experimental and theoretical approaches to explore the effect of bionic microtexture geometry on the tribological performance of hydrophobic surfaces. A theoretical model is established based on the extended Reynolds equation, and hydrophobic sandwich-like coatings with four types of bionic microtextures were fabricated using laser processing and electrohydrodynamic jet (EHDA) method. The mechanical durability and friction-wear characteristics of different samples were systematically investigated. The numerical results showed that the continuous dimple textured surface deposited with coatings (CTS-1) exhibited the largest slip velocity and the lowest friction. Sample CTS-2 exhibited best load bearing capacity with maximum surface pressure. Experimental results were consistent with the theoretical model, sample CTS-1 exhibited the lowest friction coefficient and CTS-2 had the best anti-wear performance. Compared with PS sample, the average friction coefficient of CTS-1 was reduced by 14.05 % and the wear rate of CTS-3 decreased by 19.66 %. This can be attributed to the improved slip effect of CTS-1 and higher load bearing capacity and lower cavitation of lubrication film on CTS-2. Furthermore, sample CTS-1 exhibited outstanding properties in durability tests and long-term sliding experiments, confirming the effective role of the continuous hexagonal dimple microtextures in protecting the hydrophobic nanocoatings during abrasion.
Authors: Junyan Wang, Jianxin Deng, Shiyao Rong, Zhihui Zhang, Yichen Bao
Institution: Shandong University
Language: English
Subfield: Mechanical Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $1,640
Award: G5505212307
OpenAlex ID: W4413677454