title: Surface characterization of biopolyurethanes based on cellulose derivatives.
abstract: Surface tension parameters and surface morphology of biopolyurethanes based on cellulose derivatives thin films, before and after HF cold plasma treatment has been investigated. Calculations are based on the geometric mean approach of Owens and Wendt, Rabel and Kälble, on the Lifshitz-van der Waals acid/base approach of van Oss and co-workers and on the theoretical methods involving quantitative structure-property relationship. For all the investigated samples the polar component contributes significantly to the total surface tensions, as due to the large electron donor interactions. HF cold plasma treatment modifies the surface energy of biopolyurethanes by changing their surface polarity and hydrophilicity. The hydrophilic/hydrophobic balance was studied by means of the free energy of hydration between the biomaterial film and water. The protein adsorption tests of fibrinogen were effected to evaluate the applicability of these biopolyurethanes as biomedical thromboresistant devices.
authors.affiliation: Petru Poni Institute of Macromolecular Chemistry, 700487, Iasi, Romania. eradro2002@yahoo.com
authors.forename: Doina
authors.initials: D
authors.lastname: Macocinschi
authors.forename: Daniela
authors.initials: D
authors.lastname: Filip
authors.forename: Maria
authors.initials: M
authors.lastname: Butnaru
authors.forename: Cristina Daniela
authors.initials: CD
authors.lastname: Dimitriu
mesh_terms: D000327:Adsorption; D001672:Biocompatible Materials / Q000737:chemistry*; D001704:Biopolymers / Q000737:chemistry*; D002482:Cellulose / Q000737:chemistry*; D005340:Fibrinogen / Q000378:metabolism; D006801:Humans; D066298:In Vitro Techniques; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning; D008970:Molecular Weight; D011140:Polyurethanes / Q000737:chemistry*; D013499:Surface Properties; D013500:Surface Tension; D013816:Thermodynamics; D013927:Thrombosis / Q000517:prevention & control; D014867:Water / Q000737:chemistry
chemical_list: D001672:Biocompatible Materials; D001704:Biopolymers; D011140:Polyurethanes; D014867:Water; D005340:Fibrinogen; D002482:Cellulose