Interferometry study of aqueous lubrication on the surface of polyelectrolyte brush

Motoyasu Kobayashi, Hiroyoshi Tanaka, Myo Minn, Joichi Sugimura, Atsushi Takahara

研究成果: ジャーナルへの寄稿学術誌査読

24 被引用数 (Scopus)


The water lubrication behavior of a polyelectrolyte brush was investigated by using double-spacer-layer ultra-thin-film interferometry to determine the thickness of the aqueous lubrication layer present at the interface between the brush and a spherical glass lens. A hydrophilic poly{[2-(methacryloyloxy)ethyl]trimethylammonium chloride} brush was prepared on an optical glass disk coated with layers of semireflective chromium and silica. The thickness of the hydrodynamic lubrication layer was estimated interferometrically. On increasing the sliding velocity from 10-5 to 10-1 m·s-1, the gap between the rotating disk and loading sphere glass lens showed a marked increase to 130 nm at 2 × 10-2 m·s-1, and the friction coefficient simultaneously decreased to 0.01-0.02, indicating that the polyelectrolyte brush promoted the formation of a fluid lubrication layer that separates the rubbing surfaces, preventing direct contact and providing a low friction coefficient. (Chemical Equation Presented).

ジャーナルACS Applied Materials and Interfaces
出版ステータス出版済み - 11月 26 2014

!!!All Science Journal Classification (ASJC) codes

  • 材料科学(全般)


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