Electrografting of mixed organophosphonic monolayers for SI-ATRP of 2-methacryloyloxyethyl phosphorylcholine

Bastien Arrotin, Jean Marc Noël, Joseph Delhalle, Laetitia Mespouille, Zineb Mekhalif

Research output: Contribution to journalArticlepeer-review

Abstract

Abstract: Nitinol (NiTi), one of the most important alloys for biomedical applications, is still hampered by its surface nickel inclusions, making it sensitive to pitting corrosion and leading therefore to the release of potentially carcinogenic Ni2+ ions. In this work, we assess the impact of the combination of electrografted mixed self-assembled monolayers (SAMs) on NiTi followed by a polymer coating formed by surface-initiated atom transfer radical polymerization (SI-ATRP). The molecular ratio of 11-(2-bromoisobutyrate)-undecyl-1-phosphonic acid (BUPA) to 11-decylphosphonic acid (C10P) on the electroassisted elaboration of the (BUPA/C10P)-NiTi-SAMs has been optimized. A small amount of BUPA (20%) appears to be the most promising condition, as it provides an efficient corrosion resistance and promotes the SI-ATRP of 2-methacryloyloxyethyl methacrylate (MPC). This confers to the surface hydrophilic properties and corrosion resistance close to those NiTi-SAMs when long polymerization times are used (≥ 6 h). Graphical abstract: [Figure not available: see fulltext.].

Original languageEnglish
Pages (from-to)1121-1132
Number of pages12
JournalJournal of Coatings Technology and Research
Volume16
Issue number4
DOIs
Publication statusPublished - 15 Jul 2019

Keywords

  • Corrosion
  • Electroassisted grafting
  • MPC polymer coating
  • Nitinol
  • Organophosphonic acids self-assembled monolayers (SAMs)
  • SI-ATRP

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