Effect of grafting density of poly(2-methacryloyloxyethyl phosphorylcholine) brush on the tribological properties

Motoyasu Kobayashi, Wang Zhe, Kazuhiko Ishihara, Atsushi Takahara

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

High-density polymer brush on silicon wafer was prepared by surface-initiated atom transfer radical polymerization ('grafting-from' method) of 2-methacryloyloxyethyl phosphorylcholine (MPC) using CuBr / 2,2'-bipyridyl complex in methanol at 300 K. Low-density poly(MPC) brush was prepared by 'grafting-to' method using an poly(MPC) end-functionalized with alkoxysilyl group. The surface of both poly(MPC) brush was very hydrophilic; water contact angle was below 5 degree. Dynamic friction tests were carried out by sliding a glass ball (φ = 10 mm) on the surface at a sliding velocity of 90 mm/min under loading of 0.49 N at 298 K. Friction coefficient of high-density poly(MPC) brush was much lower than that of low-density one in aqueous condition. In addition, great wear resistance was observed in a high-density polymer brush. These results indicate that high-density and super-hydrophilic polymer can act as efficient lubricant to reduce the friction coefficient.

Original languageEnglish
Title of host publicationPolymer Preprints, Japan - 55th SPSJ Annual Meeting
Pages1222
Number of pages1
Volume55
Edition1
Publication statusPublished - 2006
Event55th SPSJ Annual Meeting - Nagoya, Japan
Duration: May 24 2006May 26 2006

Other

Other55th SPSJ Annual Meeting
Country/TerritoryJapan
CityNagoya
Period5/24/065/26/06

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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