Enhancement of the adhesive strength of antithrombogenic and hemocompatible a-C:H:SiOx films to polypropylene

A. S. Grenadyorov, Solovyev, N. M. Ivanova, M. O. Zhulkov, A. M. Chernyavskiy, V. V. Malashchenko, I. A. Khlusov

Research output: Contribution to journalArticle

Abstract

Silicon- and oxygen-incorporated hydrogenated amorphous carbon films (a-C:H:SiOx) are deposited onto polypropylene substrates using plasma-assisted chemical vapor deposition to increase their antithrombogenicity and hemocompatibility. To increase the a-C:H:SiOx film adhesion to the polymer substrate, the latter is pretreated with argon or oxygen ions from the ion source with closed electron drift. The optimum conditions for the ion-beam treatment are determined by measurements of the surface wettability and chemical composition, the film morphology and adhesion. The adhesive properties are evaluated by the pull-off adhesion test. X-ray photoelectron spectroscopy shows the formation of new oxygen-containing functional groups after the exposure to both argon and oxygen ion beams. The highest film adhesion is observed for the substrate irradiated by oxygen ions, when the pull-off force increases from 3.4 to 24 kg/cm2. Various characterization techniques such as Fourier transform infrared spectroscopy, Raman spectroscopy, scanning electron microscopy are employed to study the a-C:H:SiOx film structure on a polymer substrate. In vitro investigation of platelet adhesion and cytotoxicity helps to evaluate the blood compatibility with the film. The a-C:H:SiOx film shows low thrombogenicity and no cytotoxic activity towards human leukocytes.

Original languageEnglish
Article number126132
JournalSurface and Coatings Technology
Volume399
DOIs
Publication statusPublished - 15 Oct 2020

Keywords

  • Cytotoxicity
  • Ion beam treatment
  • Platelet adhesion
  • Polypropylene
  • SiO-doped DLC

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

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