AVS 60th International Symposium and Exhibition
    Tribology Focus Topic Tuesday Sessions
       Session TR+SE-TuM

Paper TR+SE-TuM2
Ultra Low Friction Surface Designed by Biomimetic Approach

Tuesday, October 29, 2013, 8:20 am, Room 203 C

Session: Low Friction Materials
Presenter: Y. Higaki, JST ERATO Takahara Soft Interfaces Project, Japan
Authors: A. Takahara, JST ERATO Takahara Soft Interfaces Project, Japan
Y. Higaki, JST ERATO Takahara Soft Interfaces Project, Japan
M. Minn, JST ERATO Takahara Soft Interfaces Project, Japan
M. Kobayashi, JST ERATO Takahara Soft Interfaces Project, Japan
Correspondent: Click to Email
The environmentally friendly biomimetic lubrication system was designed by tethering polyelectrolytes on the substrates with sufficiently high grafting density, so-called 'polymer brushes'. The hydrated brushes in aqueous media formed water lubrication layer to reduce friction coefficient, which is useful not only for artificial joints and bio-devices but also for various mechanical devices. Macroscopic tribological properties of polyelectrolyte brushes bearing ammonium salt, sulfonic acid, or phosphorylcholine unit were characterized by ball-on-plate type tribotester in the air, water, and salt solution through sliding a glass ball on the surface under a normal pressure of ca. 130MPa. The low friction coefficient below 0.02 was observed in polyelectrolyte brushes in water.