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Organometal-catalyzed synthesis of high molecular weight poly-(l-lactic acid) with a covalently attached imidazolium salt: performance-enhanced reduced graphene oxide–PLLA biomaterials

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Abstract

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.

Graphical abstract: Organometal-catalyzed synthesis of high molecular weight poly-(l-lactic acid) with a covalently attached imidazolium salt: performance-enhanced reduced graphene oxide–PLLA biomaterials

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Publication details

The article was received on 31 Jul 2019, accepted on 12 Sep 2019 and first published on 12 Sep 2019


Article type: Paper
DOI: 10.1039/C9NJ03978C
New J. Chem., 2019, Advance Article

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    Organometal-catalyzed synthesis of high molecular weight poly-(L-lactic acid) with a covalently attached imidazolium salt: performance-enhanced reduced graphene oxide–PLLA biomaterials

    Y. C. A. Sokolovicz, C. M. L. Schrekker, F. Hild, L. de Oliveira Bodo, J. L. Couto, J. S. Klitzke, T. Maraschin, N. R. de Souza Basso, J. H. Z. dos Santos, S. Dagorne and H. S. Schrekker, New J. Chem., 2019, Advance Article , DOI: 10.1039/C9NJ03978C

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