Preparation of a mica–organic hybrid solid lubricant and characterization of its lubrication mechanisms

Kenichiro Oshita, Shinobu Komiyama, Shinya Sasaki

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A mica–organic hybrid solid lubricant was synthesized by an intercalation technique, where an alkyl ammonium cation was inserted into mica's interlayer region. And the lubrication performance and its mechanism were investigated. X-ray diffraction (XRD) showed that the distance between the silicate layers increased from 12.4 Å to 36.3 Å after the intercalation reaction. Owing to the increase in the interlayer distance, the intercalated mica showed a significantly improved lubricity. The results of Fourier-transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS) revealed that the intercalated organic cation retained a localized positive charge in mica's interlayer region and weakened electrostatic attraction to the silicate layers. This effect promotes mica's cleavage ability, resulting in a low coefficient of friction.

Original languageEnglish
Pages (from-to)349-358
Number of pages10
JournalTribology International
Publication statusPublished - 1 Jul 2018


  • Intercalation
  • Mica
  • Solid lubricant

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