Lubrication with Oil-Compatible Polymer Brushes

被引：71

作者：

Bielecki, Robert M. ^{[1
]}

Benetti, Edmondo M. ^{[1
]}

Kumar, Deepak ^{[1
]}

Spencer, Nicholas D. ^{[1
]}

机构：

[1] Swiss Fed Inst Technol, Dept Mat, Lab Surface Sci & Technol, CH-8093 Zurich, Switzerland

来源：

TRIBOLOGY LETTERS | 2012年 / 45卷 / 03期

关键词：

Polymer brush; Surface modification; ATRP; Oil lubrication; TRANSFER RADICAL POLYMERIZATION; SELF-ASSEMBLED MONOLAYERS; POLY(N-ALKYL METHACRYLATES); TRIBOLOGICAL PROPERTIES; INITIATOR DENSITY; GLASS-TRANSITION; ROOM-TEMPERATURE; BULK PROPERTIES; AQUEOUS-MEDIA; SURFACES;

D O I：

10.1007/s11249-011-9903-6

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

A polymer-brush-based, surface-modification strategy for friction and wear reduction in hard contact under boundary-lubrication conditions is proposed, specifically for a non-aqueous environment. Surface-initiated atom-transfer radical polymerization was employed for the synthesis of three different oil-compatible, hydrophobic polymer brushes based on alkyl methacrylates. This study presents polymerization kinetics, chemical characterization by means of Fourier-transform infrared spectroscopy and surface morphologies observed in atomic force microscopy. The lubrication properties of the anchored polymers were evaluated macroscopically by means of ball-on-disk methods and on the nanonewton scale by lateral force microscopy and showed significant reduction in friction up to contact pressures as high as 460 MPa. The frictional response of surface-grafted polymers is shown to depend strongly on the compatibility of the polymer with the chosen lubricating fluid.

引用

页码：477 / 487

页数：11

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