Abstract: Poly(ether ether ketone) was surface modified via immobilization of O-carboxymethyl chitosan. Acrylic acid was first introduced onto surface of PEEK by UV-initiated graft polymerization. Then O-carboxymethyl chitosan was subsequently covalent bonded onto the PEEK film. XPS, SEM, and water contact measurements were used to characterize the modified surface. The surface wettability was significantly improved with water contact angle drop from 86 ° for blank PEEK to 42 ° for modified PEEK. Palate adhesion experiments showed that the modified PEEK exhibit anti-coagulation properties.

Key words: Poly(ether ether ketone), O-carboxymethyl chitosan, Surface grafting, blood compatibility