文献类型：期刊文献

英文题名：Friction Control via Tunable Interpenetration of Spherical Polyelectrolyte Brushes

作者：Liu, Xin[1];Yu, Shulei[1];Zhang, Yuhua[1];Zhang, Ziyu[1];Li, Li[1];Kelarakis, Antonios[2];Feng, Bingge[3];Li, Jiusheng[3];Ballauff, Matthias[4];Liao, Qi[5];Guo, Xuhong[1,6]

机构：[1]East China Univ Sci & Technol, State Key Lab Chem Engn & Low Carbon Technol, Shanghai 200237, Peoples R China;[2]Univ Cent Lancashire, Ctr Mat Sci, Preston PR1 2HE, England;[3]Chinese Acad Sci, Shanghai Adv Res Inst, Lab Adv Lubricating Mat, Shanghai 201210, Peoples R China;[4]Free Univ Berlin, Inst Chem & Biochem, D-14195 Berlin, Germany;[5]Chinese Acad Sci, Inst Chem, Beijing 100190, Peoples R China;[6]Chinese Acad Agr Sci, Inst Bast Fiber Crops, Changsha 410205, Peoples R China

年份：2026

卷号：59

期号：6

起止页码：3487

外文期刊名：MACROMOLECULES

收录：;EI(收录号：20261320346931);WOS:【SCI-EXPANDED(收录号:WOS:001709174900001)】；

基金：We thank the Shanghai Professional Technical Service Platform for High-end Lubricants Research and Development for experimental support. SAXS data collection was performed with assistance from the staff at beamline BL19U2 of the National Facility for Protein Science in Shanghai (NFPS) at SSRF. The characterization of JSM-IT800 was supported by the Research Center of Analysis and Test at ECUST.

语种：英文

外文关键词：Additives - Friction - Grafting (chemical) - Macros

摘要：Polyelectrolyte brushes are promising materials for achieving superlubricity, but conventional approaches requiring chemical surface grafting limit their broad applicability. Here, we demonstrate a simple, yet effective and readily scalable friction-control strategy using spherical polyelectrolyte brushes as lubricant additives. By tuning particle concentration, we precisely control the degree of polymer chain interpenetration, a key factor determining lubrication performance. Combining scattering, viscosity, and friction measurements, we identify three distinct lubrication regimes defined by brush interpenetration. Enhanced lubrication occurs at the concentration threshold separating the semidilute partly interpenetrated regime from the semidilute fully interpenetrated regime, which aligns closely with the transition between mixed and hydrodynamic lubrication. Our results point to a direct correlation between nanoscale structural transitions and macroscale friction behavior, offering a predictive framework for enhanced lubrication in diverse industrial applications.