Photoinduced Functionalization on Polymer Surfaces

Photoreactive Carboxybetaine Copolymers Impart Biocompatibility and Inhibit Plasticizer Leaching on Polyvinyl Chloride

“…Cross-linking can effectively increase the stability of a polymer on the surface, and surface-attached zwitterionic polymer networks and hydrogels are biomolecule-repellent. , The benzophenone (BP) moiety can generate a di-radical to abstract aliphatic hydrogens in the adjacent compounds to promote chemical conjugation under ultraviolet illumination, which has been broadly utilized to induce chemical reactions for photoreactive groups. ,− Notably, both the constitutional formula of the BP-containing compounds and the wavelength/intensity of ultraviolet will strongly affect the decomposition behavior of BP moieties . Here, ultraviolet light with longer wavelength (312 nm) and lower energy dose (600 mJ/cm 2 ) was applied to allow the di-radicals to abstract hydrogens from the hydrocarbon of both the polymers and the PVC substrates to cross-link the polymer chains and covalently immobilize the polymer to the tubing.…”