Preparation of bactericidal PDMS surfaces by benzophenone photo-initiated grafting of polynorbornenes functionalized with quaternary phosphonium or pyridinium groups


Lou Y., Schapman D., Mercier D., Suer N. C. , EREN T. , Thebault P., ...More

EUROPEAN POLYMER JOURNAL, vol.157, 2021 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 157
  • Publication Date: 2021
  • Doi Number: 10.1016/j.eurpolymj.2021.110669
  • Title of Journal : EUROPEAN POLYMER JOURNAL
  • Keywords: Quaternary ammonium, ROMP, Photo, Grafting to&nbsp, PDMS, Bactericidal&nbsp, Thiol-ene, BLOCK-COPOLYMERS, STAPHYLOCOCCUS-AUREUS, POLY(ETHYLENE GLYCOL), SILICONE, ANTIBACTERIAL, POLY(DIMETHYLSILOXANE), IMMOBILIZATION, POLYMERS, COATINGS, FACILE

Abstract

Cationic ROMP-polymers bearing ammonium or phosphonium groups were photo-grafted onto a PDMS surface via the thiol-ene click reaction, in the presence of benzophenone. The PDMS surface was first thiolated using pentaerythritol tetrakis (3-mercaptopropionate) (PTTMP) under UV, in the presence of benzophenone. The obtained cationic surfaces exhibited charge densities above 1014 charge/cm2 and a higher degree of hydrophilicity compared to non-grafted surfaces. The live and dead tests performed by fluorescence microscopy revealed an effective contact bactericidal effect of these surfaces against Escherichia coli and Staphylococcus epidermidis.