首页|Novel concept of nano-additive design:PTFE@silica Janus nanoparticles for water lubrication

Novel concept of nano-additive design:PTFE@silica Janus nanoparticles for water lubrication

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Polytetrafluoroethylene(PTFE)has been widely used as a lubrication additive for reducing friction and wear;however,the hydrophobic nature of PTFE restricts its application in eco-friendly water-based lubrication systems.In this study,for the first time,we designed novel PTFE@silica Janus nanoparticles(JNs)to meet the requirement for additives in water-based lubricants,which have excellent dispersion stability in water attributed to the unique amphiphilic structure.By introducing the lubrication of the aqueous dispersion of the JNs with a concentration of 0.5 wt%,the coefficient of friction(COF)and wear volume were reduced by 63.8%and 94.2%,respectively,comparing to those with the lubrication of pure water.Meanwhile,the JNs suspension also exhibits better lubrication and wear-resistance performances comparing to commercial silica and PTFE suspensions.The excellent tribological behaviors of PTFE@silica JNs as nano-additives could be attributed to the synergetic effect of the two components,where the PTFE provided lubrication through the formed tribofilms on the friction pairs,and the rigid silica further enhanced the wear-resistance performance.Most importantly,the unique structure of JNs makes it possible to use PTFE as an additive in water-lubrication systems.Our study shed light on the design and application of novel JNs nanomaterials as additives to meet the requirements of future industrial applications.

Janus nanoparticles(JNs)polytetrafluoroethylene(PTFE)nano-additivesfrictionlubrication

Yanfei LIU、Hailing HE、Meng YANG、Ruize ZHANG、Shengtao YU、Tiantian YANG、Wenzhong WANG、Fuxin LIANG

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School of Mechanical Engineering,Beijing Institute of Technology,Beijing 100081,China

Institute of Polymer Science&Engineering,Department of Chemical Engineering,Tsinghua University,Beijing 100084,China

MOE Key Laboratory of Bioinformatics,Center for Plant Biology,School of Life Sciences,Tsinghua University,Beijing 100084,China

Tsinghua-Peking Center for Life Sciences,Beijing 100084,China

College of Biological Sciences,China Agricultural University,Beijing 100193,China

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国家自然科学基金Beijing Institute of Technology Research Fund Program for Young ScholarsTribology Science Fund of State Key Laboratory of Tribology(SKLT)in Advanced EquipmentFund of Key Laboratory of Advanced Materials of Ministry of Education

52005287SKLTKF21B14ADV21-4

2024

10.1007/s40544-023-0749-3

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CSTPCDEI
ISSN：2223-7690
年,卷(期)：2024.12(2)
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