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Theses

Procédés de Modification des Fibres naturelles (PROMOF)

Abstract : Many natural fibers have been used for a long time in textile industry as cotton and flax. Moreover, natural fibers are getting more importance in composites industry as a substitute for glass, carbon, or aramid fibers. However, they must be modified to overcome some disadvantages such as flammability, hydrophilicity and oleophilicity. In this work, phosphorus and fluoro-phosphorus flame retardants were grafted by e-beam radiation and chemical modification on flax fabrics to improve their flame retardancy, hydrophobicity and oleophobicity. The effect of chemical composition on grafting were also evaluated using miscanthus fibers in comparison to flax fabrics. The reactivity of the double bond C=C of the P-monomers was studied to control the grafting yield of various FRs. Radiation grafting steps were studied and controlled carefully. Grafting efficiency was assessed by X-ray fluorescence and Energy Dispersive X-Ray Analysis (EDX) / Scanning Electron Microscopy (SEM). Proton nuclear magnetic resonance was used to analyze the effect of irradiation on different monomers. Fire behavior of the modified fabrics was studied using thermogravimetric analysis, pyrolysis combustion flow calorimetry, cone calorimetry and a preliminary fire test. Flame retardant and oleophobic fabrics were successfully developed.
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https://tel.archives-ouvertes.fr/tel-02005677
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Submitted on : Monday, February 4, 2019 - 11:20:32 AM
Last modification on : Wednesday, June 24, 2020 - 4:19:15 PM
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  • HAL Id : tel-02005677, version 1

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Raymond Hajj. Procédés de Modification des Fibres naturelles (PROMOF). Matériaux. IMT - MINES ALES - IMT - Mines Alès Ecole Mines - Télécom, 2018. Français. ⟨NNT : 2018EMAL0005⟩. ⟨tel-02005677⟩

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