Study on the sliding tribological behavior of ZIF-8 under lubricating grease conditions  

作　　者：Ling Pan Zhi Li Yunli Wu Kaikui Zheng Yuqing Han 

机构地区：[1]School of Advanced Manufacturing,Fuzhou University,Quanzhou 362251,China [2]School of Mechanical Engineering and Automation,Fuzhou University,Fuzhou 350108,China

出　　处：《Nanotechnology and Precision Engineering》2025年第1期25-35,共11页纳米技术与精密工程(英文)

基　　金：supported by the National Natural Science Foundation of China(52275178);the Fujian Industry University Cooperation Project(2020H6025)。

摘　　要：ZIF-8 is widely applied in lubrication,adsorption,and catalysis owing to its unique physicochemical properties.Previous experimental studies have demonstrated its feasibility as a lubricant additive.In the present work,the lubricating performance of ZIF-8 as an additive to lithiumbased grease is quantitatively and dynamically analyzed at the atomic scale using molecular dynamics simulations.Friction wear experiments are also conducted to elucidate the lubrication mechanism of ZIF-8.The simulation and experimental results indicate that the incorporation of ZIF-8 effectively enhances the antifriction and antiwear characteristics of lithium grease.The most significant improvement in the lubrication performance of the grease is obtained at a mass fraction of 2.0 wt.%ZIF-8,which reduces the friction factorof the grease by about 17.0%and the wear by40.0%.Furthermore,the molecular dynamics simulations reveal that ZIF-8 primarily functions as a ball bearing under low-load conditions.However,under high-load conditions,ZIF-8 undergoes significant deformation and primarily acts as a filler.This explains the experimentally observed significant reduction in friction coefficient after the addition of ZIF-8.The results of this study provide a theoretical foundation for the development of new environmentally friendly grease additives.

关 键 词：Antifriction mechanism ZIF-8 Skeletal material Molecular dynamics Lubricant additive Lithium-based grease 

分 类 号：TH117.2[机械工程—机械设计及理论]