On the friction and adhesion hysteresis between polymer brushes attached to curved surfaces: Rate and solvation effects
作者机构：Materials Science and Technology of PolymersMESA+Institute for NanotechnologyUniversity of TwenteP.O.Box 2177500 AE Enschedethe Netherlands Jülich Supercomputing Centre Institute for Advanced Simulation FZ Jülich52425 JülichGermany Department of PhysicsLaboratory of Mechanics Faculty of ScienceUniversity of YaoundéP.O.Box 812YaoundéCameroon
出 版 物：《Friction》 (摩擦（英文版）)
年 卷 期：2015年第3卷第2期
页 面：148-160页
核心收录：
学科分类：081704[工学-应用化学] 07[理学] 0817[工学-化学工程与技术] 08[工学] 070305[理学-高分子化学与物理] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0802[工学-机械工程] 0703[理学-化学] 0801[工学-力学（可授工学、理学学位）]
基 金：SdB acknowledges financial support by the Foundation for Fundamental research on Matter(FOM),which is financially supported by the Nether-lands Organization for Scientific Research(NWO) GDK thanks Twas-DFG Cooperation Visits Programme for financial support
主 题：polymer brushes biomimetic materials molecular dynamics simulation
摘 要：Computer simulations of friction between polymer brushes are usually simplified compared to real systems in terms of solvents and *** most simulations,the solvent is only implicit with infinite compressibility and zero *** addition,the model geometries are parallel walls rather than curved or rough as in *** this work,we study the effects of these approximations and more generally the relevance of solvation on dissipation in polymer-brush systems by comparing simulations based on different solvation *** find that the rate dependence of the energy loss during the collision of brush-bearing asperities can be different for explicit and implicit ***,the non-Newtonian rate dependences differ noticeably between normal and transverse motion,i.e.,between head-on and off-center asperity ***,when the two opposing brushes are made immiscible,the friction is dramatically reduced compared to an undersaturated miscible polymer-brush system,irrespective of the sliding direction.
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