{"title":"Biomimetic design of UHMWPE bearing interfaces lubricated through boundary-fluid mixed mechanism for artificial joints","authors":"Dangsheng Xiong , Yuntong Liu , Yaling Deng","doi":"10.1016/j.triboint.2025.110535","DOIUrl":null,"url":null,"abstract":"<div><div>Natural articular cartilage, devoid of lymph and blood vessels, has limited self-repair capacity but can function for up to 70 years. Its remarkable longevity is attributed to its porous, water-containing structure and lubrication from brushlike polymers. In this study, simulating structure and lubrication mechanism of natural articular cartilage, a composite structure incorporating pores and brushlike polymers was constructed on bearing interface of UHMWPE artificial joint. The biomimetic bearing interface achieved a boundary-fluid mixed lubrication mechanism, demonstrating ultra-high wettability (0° contact angle) and low friction coefficient (0.03) comparable to that of natural articular cartilage, while also exhibiting a relatively long lifespan. This study presents a promising technology for fabricating super-lubricated bearing interfaces mimicking natural cartilage and elaborates a unique lubrication mechanism.</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":"204 ","pages":"Article 110535"},"PeriodicalIF":6.1000,"publicationDate":"2025-04-01","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/S0301679X25000301","RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2025/1/14 0:00:00","PubModel":"Epub","JCR":"Q1","JCRName":"ENGINEERING, MECHANICAL","Score":null,"Total":0}
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Abstract
Natural articular cartilage, devoid of lymph and blood vessels, has limited self-repair capacity but can function for up to 70 years. Its remarkable longevity is attributed to its porous, water-containing structure and lubrication from brushlike polymers. In this study, simulating structure and lubrication mechanism of natural articular cartilage, a composite structure incorporating pores and brushlike polymers was constructed on bearing interface of UHMWPE artificial joint. The biomimetic bearing interface achieved a boundary-fluid mixed lubrication mechanism, demonstrating ultra-high wettability (0° contact angle) and low friction coefficient (0.03) comparable to that of natural articular cartilage, while also exhibiting a relatively long lifespan. This study presents a promising technology for fabricating super-lubricated bearing interfaces mimicking natural cartilage and elaborates a unique lubrication mechanism.
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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