Hydrophilization by coating of silylated polyoxazoline using sol-gel process

International audience; Hybrid films prepared from TEOS and polyoxazolines (Si-POx-Si) crosslinking agents were coated on different substrates in order to modify their surface properties. The film cohesion and adhesion on sub- strates were expected through the hydrogen bonding of the polyoxazoline crosslinked network. Low molecular-weight ﰁ,ﰂ-unsaturated polyoxazolines (DA-PMOx)s were synthesized by a one step cationic ring-opening polymerization (CROP) of 2-methyl-2-oxazoline (MOx) with a good control over the molec- ular weight. Based on double thiol-ene coupling (d-TEC) a post-functionalization of DA-PMOx end chains gave in good yield polyoxazoline cross linker (Si-POx-Si). Glass and various polymer substrates (PP, PEI, POM, etc.) were spin coated by the organic-inorganic hybrid films through sol-gel process. AFM, SEM, visible reflectance spectroscopy and contact angle experiments allowed the full characterization of targeted surfaces and demonstrated the efficiency of the polyoxazoline coating.