Organometal-catalyzed synthesis of high molecular weight poly-( l -lactic acid) with a covalently attached imidazolium salt: performance-enhanced reduced graphene oxide–PLLA biomaterials
| Autor: | Thuany Maraschin, Nara Regina de Souza Basso, Frédéric Hild, Henri Stephan Schrekker, João Henrique Zimnoch dos Santos, Clarissa M. L. Schrekker, Yuri C. A. Sokolovicz, Joice S. Klitzke, Samuel Dagorne, Leonardo de Oliveira Bodo, Júlia Lacerda Couto |
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| Přispěvatelé: | Institut de Chimie de Strasbourg, Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC), Centre National de la Recherche Scientifique (CNRS)-Université Louis Pasteur - Strasbourg I-Institut de Chimie du CNRS (INC) |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Tetrafluoroborate
Oxide Salt (chemistry) 02 engineering and technology 010402 general chemistry 01 natural sciences Catalysis law.invention chemistry.chemical_compound law Materials Chemistry ComputingMilieux_MISCELLANEOUS chemistry.chemical_classification Graphene General Chemistry [CHIM.MATE]Chemical Sciences/Material chemistry 021001 nanoscience & nanotechnology 0104 chemical sciences Solvent [CHIM.POLY]Chemical Sciences/Polymers Chemical engineering chemistry Polymerization Covalent bond 0210 nano-technology |
| Zdroj: | New Journal of Chemistry New Journal of Chemistry, Royal Society of Chemistry, 2019, 43 (41), pp.16367-16373. ⟨10.1039/C9NJ03978C⟩ |
| ISSN: | 1144-0546 1369-9261 |
| Popis: | Herein, we report on the synthesis of imidazolium salt end-functionalized PLLA (PLLA-IS) and its application in the preparation of reduced graphene oxide–PLLA composites. When applying the imidazolium salt 1-(2-hydroxyethyl)-3-methylimidazolium tetrafluoroborate as the initiator, the organometallic Zn(C6F5)2toluene complex polymerized L-lactide into high molecular weight PLLA-IS (Mn up to 56k). The presence of this imidazolium functionality enhanced the PLLA−reduced graphene oxide interaction, which promoted a homogenous dispersion of this filler when applying a solvent casting procedure. Significant improvements in the mechanical properties were achieved, reaching 148% and 105% for the loss and storage moduli, respectively. Besides, the PLLA-IS/rGO-1% composite inhibited the growth of fungal biofilms, including C. tropicalis (43%) and C. albicans (34%). Altogether, these materials exhibit properties for novel applications, including as biomaterials. |
| Databáze: | OpenAIRE |
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