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Your search keyword '"Fiona Magliozzi"' showing total 3 results
Start Over Author "Fiona Magliozzi" Topic 021001 nanoscience & nanotechnology
3 results on '"Fiona Magliozzi"'

1. Enantioselective Crystallization of Diglycerol Dicarbonate: Impact of the Microstructure on Polyhydroxyurethane Properties

Author

Etienne Grau, Guillaume Chollet, Henri Cramail, Fiona Magliozzi, Arthur Scali, Laboratoire de Chimie des Polymères Organiques (LCPO), Centre National de la Recherche Scientifique (CNRS)-Institut Polytechnique de Bordeaux-Ecole Nationale Supérieure de Chimie, de Biologie et de Physique (ENSCBP)-Université de Bordeaux (UB)-Institut de Chimie du CNRS (INC), Team 2 LCPO : Biopolymers & Bio-sourced Polymers, Centre National de la Recherche Scientifique (CNRS)-Institut Polytechnique de Bordeaux-Ecole Nationale Supérieure de Chimie, de Biologie et de Physique (ENSCBP)-Université de Bordeaux (UB)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut Polytechnique de Bordeaux-Ecole Nationale Supérieure de Chimie, de Biologie et de Physique (ENSCBP)-Université de Bordeaux (UB)-Institut de Chimie du CNRS (INC), and Equipe Nutrition, Santé et Biochimie des Lipides (ITERG)

Subjects
Materials science, Polymers and Plastics, Polyurethanes, Carbonates, 02 engineering and technology, Crystal structure, 010402 general chemistry, 01 natural sciences, law.invention, chemistry.chemical_compound, law, Materials Chemistry, Dicarbonate, Crystallization, Polyurethane, Organic Chemistry, Enantioselective synthesis, Recrystallization (metallurgy), Stereoisomerism, [CHIM.MATE]Chemical Sciences/Material chemistry, 021001 nanoscience & nanotechnology, Microstructure, 0104 chemical sciences, Crystallography, [CHIM.POLY]Chemical Sciences/Polymers, chemistry, Enantiomer, 0210 nano-technology
Abstract

International audience; Bicylic carbonates are precursors employed in non-isocyanate polyurethane syntheses, namely polyhydroxyurethanes (PHUs) and, among them, ether-activated biobased diglycerol dicarbonate (DGDC) is widely investigated. Herein, the original separation of DGDC stereoisomers, thanks to a recrystallization procedure, leading to enantiomers having different crystal lattices, that is, square transparent crystals and needle-like structures, respectively, is reported. In this study, the separation and the characterization of the two crystal structures is first discussed and, second, the impact of the stereochemistry of DGDC on the corresponding PHUs properties is investigated.

Published
2020

2. Hydrolysable bio-based polyhydroxyurethane networks with shape memory behavior at body temperature

Author

Damien Montarnal, Arthur Scali, Guillaume Chollet, Etienne Grau, Fiona Magliozzi, Henri Cramail, Laboratoire de Chimie des Polymères Organiques (LCPO), Centre National de la Recherche Scientifique (CNRS)-Institut Polytechnique de Bordeaux-Ecole Nationale Supérieure de Chimie, de Biologie et de Physique (ENSCBP)-Université de Bordeaux (UB)-Institut de Chimie du CNRS (INC), Team 2 LCPO : Biopolymers & Bio-sourced Polymers, Centre National de la Recherche Scientifique (CNRS)-Institut Polytechnique de Bordeaux-Ecole Nationale Supérieure de Chimie, de Biologie et de Physique (ENSCBP)-Université de Bordeaux (UB)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut Polytechnique de Bordeaux-Ecole Nationale Supérieure de Chimie, de Biologie et de Physique (ENSCBP)-Université de Bordeaux (UB)-Institut de Chimie du CNRS (INC), Institut des Corps Gras (ITERG), Laboratoire de Chimie, Catalyse, Polymères et Procédés, R 5265 (C2P2), Centre National de la Recherche Scientifique (CNRS)-École supérieure de Chimie Physique Electronique de Lyon (CPE)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut de Chimie du CNRS (INC), Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Université de Lyon-École supérieure de Chimie Physique Electronique de Lyon (CPE)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Tris, General Chemical Engineering, polyurethanes, Tris(2-aminoethyl)amine, isocyanate-free, 02 engineering and technology, Reactive extrusion, 010402 general chemistry, 01 natural sciences, chemistry.chemical_compound, Aminolysis, Environmental Chemistry, [CHIM]Chemical Sciences, shape memory recovery, Dicarbonate, tris(2-aminoethyl)amine, Renewable Energy, Sustainability and the Environment, General Chemistry, [CHIM.MATE]Chemical Sciences/Material chemistry, aminolysis, 021001 nanoscience & nanotechnology, polyhydroxyurethane, 3. Good health, 0104 chemical sciences, Template, [CHIM.POLY]Chemical Sciences/Polymers, chemistry, Chemical engineering, tris(2-(methylamino)ethyl)amine), [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], Amine gas treating, 0210 nano-technology, Glass transition
Abstract

International audience; Among possible routes towards isocyanate-free PUs, aminolysis of cyclic carbonates leading to polyhydroxyurethanes (PHUs) is one of the most promising pathways. Herein, we describe the solvent-free synthesis of shape memory PHU networks from diglycerol dicarbonate through reactive extrusion with varying amounts of primary and secondary triamines, Tris(2-aminoethyl)amine and Tris(2-(methyla-mino)ethyl)amine). Depending on the composition of the system, the glass transition temperature of the PHU networks can be finely tuned in the 20-40°C range and, consequently, affords shape memory recovery at body temperature. In addition, these networks revealed hydro-lysable over a few months and may find uses as bioresorbable templates for medical applications.

Published
2020

3. Benefit of the reactive extrusion in the course of polyhydroxyurethane synthesis by aminolysis of cyclic carbonates

Author

Henri Cramail, Guillaume Chollet, Fiona Magliozzi, Etienne Grau, Laboratoire de Chimie des Polymères Organiques (LCPO), Centre National de la Recherche Scientifique (CNRS)-Institut Polytechnique de Bordeaux-Ecole Nationale Supérieure de Chimie, de Biologie et de Physique (ENSCBP)-Université de Bordeaux (UB)-Institut de Chimie du CNRS (INC), Team 2 LCPO : Biopolymers & Bio-sourced Polymers, Centre National de la Recherche Scientifique (CNRS)-Institut Polytechnique de Bordeaux-Ecole Nationale Supérieure de Chimie, de Biologie et de Physique (ENSCBP)-Université de Bordeaux (UB)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut Polytechnique de Bordeaux-Ecole Nationale Supérieure de Chimie, de Biologie et de Physique (ENSCBP)-Université de Bordeaux (UB)-Institut de Chimie du CNRS (INC), Lipochimie Hall Industriel, and Institut des Corps Gras (ITERG)

Subjects
Renewable Energy, Sustainability and the Environment, General Chemical Engineering, Process improvement, biobased biscyclic carbonates, 02 engineering and technology, General Chemistry, Reactive extrusion, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, 0104 chemical sciences, reactive extrusion, chemistry.chemical_compound, Aminolysis, [CHIM.POLY]Chemical Sciences/Polymers, [CHIM.GENI]Chemical Sciences/Chemical engineering, chemistry, process improvement, Environmental Chemistry, Organic chemistry, 0210 nano-technology, solvent-free polymerizations, Polyurethane, Polyhydroxyurethanes
Abstract

International audience; Replacing toxic isocyanates and petro-based reactants currently employed for polyurethanes (PUs) synthesis is nowadays a major concern. Among all the possible routes to isocyanate-free PUs, aminolysis of cyclic car-bonates, leading to polyhydroxyurethanes (PHUs) seems to be one of the most promising pathways. Herein, we discuss the added value brought by the reactive extrusion process on PHU synthesis. In order to evaluate the benefit and the versatility of the process, three different bis-cyclic carbonates exhibiting different reactivity (Diglycerol Dicarbonate, Seb-bCC-ester and one bisCC containing amide function, Und-6DA-bisCC), were tested in the course of polymerization with different diamines. The PHUs synthesized through reactive extrusion were then compared with the ones obtained through classical bulk polymerizations in terms of kinetics, PHU molar masses and side reactions, clearly demonstrating the benefit of the extrusion process.

Published
2019

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