MAGNETIC AND PHYSICAL-MECHANICAL PROPERTIES OF WOOD PARTICLEBOARDS COMPOSITE (MWPC) FABRICATED WITH FE3O4 NANOPARTICLES AND THREE PLANTATION WOOD
Abstract
This study has the main objective to synthesize in situs Fe3O4 nanoparticles (NPs) in fiber particles of three tropical wood (Pinus oocarpa, Vochysia guatemalensis, and Vochysia ferruginea) using two different solutions of Fe3+ and Fe2+ in an aqueous ammonia solution. The magnetic properties were measured by determining fiber particles' Fe3O4 magnetization parameters (coercivity, remanence, saturation magnetization). The FTIR and XDR spectra were also obtained. After the magnetic wood particleboard (MWPC) was fabricated with 100% magnetic particles (MWPC-100) and a superficial layer magnetized with fiber (MWPC-layer), their physical, mechanics, and magnetic properties were compared. The results showed that Fe3O4 NPs content was similar in two Vochyseas species but higher than P. oocarpa. Ash content was similar in the three species. It was difficult to demonstrate the presence of Fe3O4 NPs in the FT-IR spectrum. The diameter of nanoparticles varied from 51 to 68 nm and the saturation magnetization parameters were low, but these values were higher in P. oocarpa. MWPC showed that the use of NPs decreases the density of P. oocarpa but increases the density of the Vochyseas species. Swelling and moisture absorption increased in the MWPC-100 of P. oocarpa and V. guatemalensis but decreased in V. guatemalensis composite. The internal bond decreased in MWPC-100, but not in the MWPC layer. Hardness increased in the MWPC layer in P. oocarpa, but not in MWPC-100, and this property increased in MWPC-100 and the MWPC layer fabricated with V. ferruginea and V. guatemalensis.
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