Effect of chemical heterogeneity of biodegradable polymers on surface energy: A static contact angle analysis of polyester model films
| Autor: | Laurence Mora, Rima Belibel, Alexis Garcia, Thierry Avramoglou, Christel Barbaud |
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| Přispěvatelé: | Laboratoire de Recherche Vasculaire Translationnelle (LVTS (UMR_S_1148 / U1148)), Université Paris 13 (UP13)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de la Santé et de la Recherche Médicale (INSERM), Laboratoire des Sciences des Procédés et des Matériaux (LSPM), Centre National de la Recherche Scientifique (CNRS)-Université Sorbonne Paris Cité (USPC)-Institut Galilée-Université Paris 13 (UP13), Barbaud, Christel, Université Paris 13 (UP13)-Institut Galilée-Université Sorbonne Paris Cité (USPC)-Centre National de la Recherche Scientifique (CNRS) |
| Rok vydání: | 2016 |
| Předmět: |
Materials science
Heterogeneous surfaces Polyesters [SDV]Life Sciences [q-bio] Biocompatible Materials Bioengineering 02 engineering and technology Surface finish 010402 general chemistry 01 natural sciences Biomaterials Surface tension Contact angle Sessile drop technique Materials Testing Polymer chemistry Biodegradable (poly((R S)-3 Sessile drop 3 dimethylmalic acid) derivatives 021001 nanoscience & nanotechnology Biodegradable polymer Surface energy 0104 chemical sciences [SDV] Life Sciences [q-bio] Polyester Models Chemical Chemical engineering Mechanics of Materials Wettability Wetting 0210 nano-technology Hydrophobic and Hydrophilic Interactions |
| Zdroj: | Materials Science and Engineering: C Materials Science and Engineering: C, Elsevier, 2015, 59, pp.998-1006. ⟨10.1016/j.msec.2015.10.010⟩ Materials Science and Engineering: C, 2015, 59, pp.998-1006. ⟨10.1016/j.msec.2015.10.010⟩ |
| ISSN: | 0928-4931 |
| Popis: | International audience; a r t i c l e i n f o Biodegradable and bioassimilable poly((R,S)-3,3 dimethylmalic acid) (PDMMLA) derivatives were synthesized and characterized in order to develop a new coating for coronary endoprosthesis enabling the reduction of reste-nosis. The PDMMLA was chemically modified to form different custom groups in its side chain. Three side groups were chosen: the hexyl group for its hydrophobic nature, the carboxylic acid and alcohol groups for their acid and neutral hydrophilic character, respectively. The sessile drop method was applied to characterize the wettability of biodegradable polymer film coatings. Surface energy and components were calculated. The van Oss approach helped reach not only the dispersive and polar acid–base components of surface energy but also acid and basic components. Surface topography was quantified by atomic force microscopy (AFM) and subnanometer average values of roughness (Ra) were obtained for all the analyzed surfaces. Thus, roughness was considered to have a negligible effect on wettability measurements. In contrast, heterogeneous surfaces had to be corrected by the Cassie–Baxter equation for copolymers (10/90, 20/80 and 30/70). The impact of this correction was quantified for all the wettability parameters. Very high relative corrections (%) were found, reaching 100% for energies and 30% for contact angles. |
| Databáze: | OpenAIRE |
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