Chemical modification of hemp fibers by silane coupling agents

Abstract : Natural hemp fibers were chemically modified using silane coupling agents to reduce their hydrophilic character. The existence of a chemical bond between coupling agents and hemp fibers was confirmed by ATR-FTIR spectroscopy, 29Si Nuclear Magnetic Resonance (NMR), thermogravimetric analysis (TGA), energy dispersive spectroscopy (EDS), and BET surface area measurements. It was shown that the initial concentration and the chemical structure of the organosilane coupling agent have an effect on the grafted quantity on the hemp fiber surfaces. The grafted quantity increased proportionally to the initial concentration of silane molecules. The presence of polar amino end group (NH2) in silane structure can cause an increase in the grafted quantity, compared with results obtained in the case of silane molecules containing methacryloxy groups. This effect is attributed to the formation of hydrogen bonds between NH2 and unreacted hydroxyl groups of hemp fibers.
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Contributeur : Fabrice Rossignol <>
Soumis le : mercredi 11 février 2015 - 15:07:52
Dernière modification le : lundi 22 janvier 2018 - 14:36:02

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Ali Rachini, Marianne Le Troëdec, Claire Peyratout, Agnès Smith. Chemical modification of hemp fibers by silane coupling agents. Journal of Applied Polymer Science, Wiley, 2012, 123 (1), pp.601-610. ⟨10.1002/app.34530⟩. ⟨hal-01115677⟩

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