Surface characterization of biopolyurethanes based on cellulose derivatives

详细信息    查看全文

• 作者：Doina Macocinschi ; Daniela Filip ; Maria Butnaru and Cristina Daniela Dimitriu
• 刊名：Journal of Materials Science Materials in Medicine
• 出版年：2009
• 出版时间：March, 2009
• 年：2009
• 卷：20
• 期：3
• 页码：775-783
• 全文大小：428.6 KB

文摘

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 K?lble, 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.