Electric-Field-Induced Friction Reduction and Control

被引：64

作者：

Drummond, Carlos ^{[1
,2
]}

机构：

[1] CNRS, Ctr Rech Paul Pascal, UPR 8641, F-33600 Pessac, France

[2] Univ Bordeaux, CRPP, UPR 8641, F-33600 Pessac, France

来源：

PHYSICAL REVIEW LETTERS | 2012年 / 109卷 / 15期

关键词：

POLYELECTROLYTE BRUSHES; LUBRICATION FORCES; CHARGED POLYMERS; SURFACES; LAYERS;

D O I：

10.1103/PhysRevLett.109.154302

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Friction is always present when surfaces in contact are set in motion. In this work I describe how a precise, active control of the global friction is possible by adjusting the local molecular conformation of a polyelectrolyte coating via the application of an alternating electric field. The intensity of the applied field determines the degree of interpenetration between polymer brushes in contact, regulating chain stretching while sliding, which is the process at the origin of the global friction. The dynamics of the problem is controlled by the relaxation times of the polyelectrolyte.

引用

页数：5

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