Single-step covalent functionalization of polylactide surfaces.
A single-step, nondestructive, and versatile technique for the grafting and chemical surface modification of biodegradable polymers such as polylactide is described. The substrates are subjected to the vapor phase of any of three investigated vinyl monomers: acrylamide, maleic anhydride, and N-vinylpyrrolidone, and grafting is induced by photoinitiation of benzophenone under solvent free conditions. The modified surfaces exhibit higher wettability, and the grafting is verified by X-ray photoelectron spectroscopy, attenuated total reflection Fourier-transform IR, contact-angle measurements, and scanning electron microscopy. The graft-chain pendant groups remain functional and can subsequently be modified so that a tailor-made surface with desired properties may be achieved.
Edlund
Ulrica
U
Fibre and Polymer Technology, Royal Institute of Technology, SE-100 44 Stockholm, Sweden.
Källrot
Martina
M
Albertsson
Ann-Christine
AC
D020106:Acrylamide / Q000737:chemistry; D001577:Benzophenones / Q000737:chemistry; D005740:Gases; D008299:Maleic Anhydrides / Q000737:chemistry; D010777:Photochemistry; D011091:Polyesters / Q000737:chemistry*; D011760:Pyrrolidinones / Q000737:chemistry; D017550:Spectroscopy, Fourier Transform Infrared; D013499:Surface Properties; D014466:Ultraviolet Rays
D001577:Benzophenones; D005740:Gases; D008299:Maleic Anhydrides; D011091:Polyesters; D011760:Pyrrolidinones; D020106:Acrylamide; C033616:poly(lactide); C047723:benzophenone; C042670:N-vinyl-2-pyrrolidinone