Fabrication of novel hybrid materials based on iron-aluminum modified hemp fibers: Comparison between two proposed methodologies

This paper reports the fabrication of novel hybrid and structured materials by using hemp fibers as organic support. Two in-situ methodologies were proposed and applied to modify the surface of hemp fibers in order to improve their physical properties and to confer a magnetic behavior: i) coprecipitation of Fe/Al layered double hydroxides through urea method (MHF@LDH Fe/Al) and ii) deposition of Fe3O4 particles onto AlOOH modified hemp fibers in ammonia solution (MHF@AlOOH-FePs). The obtained hybrid materials have been widely characterized in terms of spectroscopic, morphological, thermal and barrier properties. Finally, a further investigation concerned the evaluation of surface charge and the estimation of magnetic properties showing a ferromagnetic behavior (Curie Temperature Tc > 300 K) for both samples with a coercive field of Hc ≈± 40 Oe for MHF@LDH Fe/Al and Hc ≈ ± 10 Oe for MHF@AlOOH-FePs.