Modification of flax fiber fabrics by radiation grafting: Application to epoxy thermosets and potentialities for silicone-natural fibers composites
| Autor: | Xavier Coqueret, Gabriela Tataru, Romain Léger, Kevin Guibert, Sophie Rouif, Marianne Labbé |
|---|---|
| Přispěvatelé: | Institut de Chimie Moléculaire de Reims - UMR 7312 (ICMR), SFR Condorcet, Université de Reims Champagne-Ardenne (URCA)-Université de Picardie Jules Verne (UPJV)-Centre National de la Recherche Scientifique (CNRS)-Université de Reims Champagne-Ardenne (URCA)-Université de Picardie Jules Verne (UPJV)-Centre National de la Recherche Scientifique (CNRS)-SFR CAP Santé (Champagne-Ardenne Picardie Santé), Université de Reims Champagne-Ardenne (URCA)-Université de Picardie Jules Verne (UPJV)-Université de Reims Champagne-Ardenne (URCA)-Université de Picardie Jules Verne (UPJV)-Université de Reims Champagne-Ardenne (URCA)-Centre National de la Recherche Scientifique (CNRS), Durabilité des éco-Matériaux et Structures (DMS), Laboratoire de Mécanique et Génie Civil (LMGC), Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Centre des matériaux des Mines d'Alès (C2MA), IMT - MINES ALES (IMT - MINES ALES), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)-IMT - MINES ALES (IMT - MINES ALES), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT), Université de Reims Champagne-Ardenne (URCA)-Université de Picardie Jules Verne (UPJV)-Université de Reims Champagne-Ardenne (URCA)-Université de Picardie Jules Verne (UPJV)-Université de Reims Champagne-Ardenne (URCA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-IMT - MINES ALES (IMT - MINES ALES) |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Composite number Thermosetting polymer 01 natural sciences 030218 nuclear medicine & medical imaging Flax fiber 03 medical and health sciences chemistry.chemical_compound 0302 clinical medicine Silicone X-ray photoelectron spectroscopy Epoxy thermosets 0103 physical sciences Vinylsiloxane-based materials Fiber-matrix interactions Composite material Curing (chemistry) Composites Radiation 010308 nuclear & particles physics Thermal decomposition technology industry and agriculture Epoxy Radiation-induced grafting [CHIM.MATE]Chemical Sciences/Material chemistry [CHIM.POLY]Chemical Sciences/Polymers chemistry visual_art Radiation-induced peroxidation visual_art.visual_art_medium Natural fibers Flax fabrics |
| Zdroj: | Radiation Physics and Chemistry Radiation Physics and Chemistry, Elsevier, 2020, 170, pp.108663. ⟨10.1016/j.radphyschem.2019.108663⟩ |
| ISSN: | 0969-806X |
| DOI: | 10.1016/j.radphyschem.2019.108663⟩ |
| Popis: | International audience; This article reports on the results of a collaborative work aiming at improving the mechanical performances of composites based on flax fabrics and epoxy thermosets or silicone materials. Radiation processing was assessed as a simple pretreatment to modify the surface composition of commercially available fabrics. Two approaches were explored after analysis of the chemical features of the two types of composites.A first method designed for epoxy thermosets is based on the immobilization of bio-based adhesion promoters, partially epoxidized fatty oils exhibiting carbon-carbon unsaturations and epoxy groups expected to act as coupling agents after simultaneous EB radiation-grafting process.The second method was based on the peroxidation by EB-irradiation in air of the flax fabrics selected for the reinforcement of vinylsiloxane-based silicone materials. The thermal decomposition of peroxyl groups during the curing of a silicone matrix including vinylsiloxane units was indeed expected to generate covalent links between the fibers and reactive silicone formulations.The advantage and limitations of the two methods are discussed based on mechanical testing of composite specimens fabricated with the original fabrics, or after implementation of the radiation-induced pre-treatments. The efficiency of the proposed grafting processes is supported by XPS at the different stages of the modification process, as well as by SEM observation of fractured samples. The spectroscopic signature of adhesion promoters for the epoxy composites or of models of the silicone matrix was observed after radiation-promoted immobilization and extensive washing of fabric samples. |
| Databáze: | OpenAIRE |
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