{"title":"Enhanced stable lubrication performance by surface nanobubble morphology modulated by conical pit notch diameter","authors":"Chao Wang , Yan Lu","doi":"10.1016/j.triboint.2025.110545","DOIUrl":null,"url":null,"abstract":"<div><div>A water-controlled ratio multisolvent evaporation method for the preparation of hydrophobic surfaces with nanocone pits of different sizes is proposed. The morphology of nanobubbles on the surface of conical pits was observed by atomic force underwater testing, revealing that the diameter of the conical pit notch is the key to influence the nanobubble morphology. The nucleation mechanism of nanobubbles due to local saturation of gases in pure water solution and the regulation mechanism of nanobubble morphology by the surface potential energy of cone pits are revealed by the molecular dynamics simulation method of alcohol-water exchange. Lubrication experiments demonstrate that surfaces with nanobubbles have a more stable high drag reduction, and the larger the nanobubble morphology the better the stable lubrication.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"205 ","pages":"Article 110545"},"PeriodicalIF":6.1000,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Tribology International","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0301679X25000404","RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2025/1/20 0:00:00","PubModel":"Epub","JCR":"Q1","JCRName":"ENGINEERING, MECHANICAL","Score":null,"Total":0}
引用次数: 0
Abstract
A water-controlled ratio multisolvent evaporation method for the preparation of hydrophobic surfaces with nanocone pits of different sizes is proposed. The morphology of nanobubbles on the surface of conical pits was observed by atomic force underwater testing, revealing that the diameter of the conical pit notch is the key to influence the nanobubble morphology. The nucleation mechanism of nanobubbles due to local saturation of gases in pure water solution and the regulation mechanism of nanobubble morphology by the surface potential energy of cone pits are revealed by the molecular dynamics simulation method of alcohol-water exchange. Lubrication experiments demonstrate that surfaces with nanobubbles have a more stable high drag reduction, and the larger the nanobubble morphology the better the stable lubrication.
期刊介绍：
Tribology is the science of rubbing surfaces and contributes to every facet of our everyday life, from live cell friction to engine lubrication and seismology. As such tribology is truly multidisciplinary and this extraordinary breadth of scientific interest is reflected in the scope of Tribology International.
Tribology International seeks to publish original research papers of the highest scientific quality to provide an archival resource for scientists from all backgrounds. Written contributions are invited reporting experimental and modelling studies both in established areas of tribology and emerging fields. Scientific topics include the physics or chemistry of tribo-surfaces, bio-tribology, surface engineering and materials, contact mechanics, nano-tribology, lubricants and hydrodynamic lubrication.
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