Direct modification of polyolefin films by surface-initiated polymerization of a phosphobetaine monomer

Motoyasu Kobayashi, Tomoaki Matsugi, Junji Saito, Jun Ichi Imuta, Norio Kashiwa, Atsushi Takahara

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

The surfaces of polyethylene and polypropylene sheets were modified by grafting with polymeric brushes formed from a phosphobetaine monomer. Pressed sheets of bromo-functionalized polyethylene or polypropylene macroinitiators (PE-MIs and PP-MIs, respectively) were used to initiate the atom-transfer radical polymerization of 2-(methacryloyloxy)ethyl phosphorylcholine (MPC) under mild conditions to form a superhydrophilic grafted surface layer. The grafted polyolefin sheets showed excellent wettability and oil-detachment behaviour in water. Even three years after surface grafting had been performed, the PMPC-g-PP sheet retained a water contact angle of less than 10°. Furthermore, the water contact angle of the PMPC-g-PP sheet remained as low as 12° after it had been annealed at 373 K for 60 min under reduced pressure. Dynamic friction tests performed on the PMPC-g-PE sheet by sliding it against a glass ball revealed a marked reduction in the friction coefficient in water at sliding velocities in the range of 10-5 to 10-1 m s-1, possibly as a result of lubrication by water.

Original languageEnglish
Pages (from-to)731-739
Number of pages9
JournalPolymer Chemistry
Volume4
Issue number3
DOIs
Publication statusPublished - Feb 7 2013

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Biochemistry
  • Polymers and Plastics
  • Organic Chemistry

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