XRD investigation of mechanical properties of cellulose microfibrils in S1 and S3 layers of thermally modified wood under tensile loading

Kojima, Erina; Yamasaki, Mariko; Imaeda, Koki; Lee, Chang-Goo; Sugimoto, Takanori; Sasaki, Y.

doi:10.1007/s00226-021-01263-z

Cited by 5 publications

(1 citation statement)

References 22 publications

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“…The representative magnetic properties (H c , M r and M s ) were extracted from the hysteresis loops, while the percentage of magnetic NPs present in the samples was calculated from the saturation magnetization of the pure Fe 3 O 4 NPs for which the value was 15.37 emu/g. As a side note, it is well known that NPs show a lower M s compared with the M s of their bulk materials [55]; in this case, the bulk Fe 3 O 4 had an Ms of 93 emu/g [56].…”

Section: Magnetic Properties Of Woodmentioning

confidence: 89%

In Situ Synthesis of Fe3O4 Nanoparticles and Wood Composite Properties of Three Tropical Species

Moya

Merazzo

2022

Materials

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Magnetic wood is a composite material that achieves harmony between both woody and magnetic functions through the active addition of magnetic characteristics to the wood itself. In addition to showing magnetic characteristics, magnetic wood offers low specific gravity, humidity control and acoustic absorption ability. It has potential for broad applications in the fields of electromagnetic wave absorption, electromagnetic interference shielding, furniture, etc. This work reports on the synthesis of Fe3O4 nanoparticles (NPs) in wood from three tropical species (Pinus oocarpa, Vochysia ferruginea and Vochysia guatemalensis) using a solution of iron (III) hexahydrate and iron (II) chloride tetrahydrate with a molar ratio of 1.6:1 at a concentration of 1.2 mol/L ferric chlorate under 700 kPa pressure for 2 h. Afterward, the wood samples were impregnated with an ammonia solution with three different immersion times. The treated wood (wood composites) was evaluated for the weight gain percentage (WPG), density, ash content and Fe3O4 content by the Fourier transform infrared spectroscopy (FTIR) spectrum, X-ray diffraction (XRD) and vibrating sample magnetometry (VSM). The results show that the species P. oocarpa had the lowest values of WPG, and its density decreased in relation to the untreated wood, with lower ash and Fe3O4 NP content. The XRD and some FTIR signals associated with changes in the wood component showed small differences from the untreated wood. Fe3O4 NPs presented nanoparticles with the smallest diameter of (approx. 7.3 to 8.5 nm), and its saturation magnetization (Ms) parameters were the lowest. On the other hand, V. guatemalensis was the species with the best Ms values, but the wood composite had the lowest density. In relation to the different immersion times, the magnetic properties were not statistically affected. Finally, the magnetization values of the studied species were lower than those of the pure Fe3O4 nanoparticles, since the species only have a certain amount of these nanoparticles (NPs), and this was reflected proportionally in the magnetization of saturation.

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Section: Magnetic Properties Of Woodmentioning

confidence: 89%

In Situ Synthesis of Fe3O4 Nanoparticles and Wood Composite Properties of Three Tropical Species

Moya

Merazzo

2022

Materials

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Plant cell wall polysaccharides: Methodologies for compositional, structural, and physicochemical characterization

Miguez¹,

Jorge²,

Espinheira³

et al. 2023

Polysaccharide-Degrading Biocatalysts

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Synchrotron X-ray measurements of cellulose in the cell wall of aged wood under uniaxial loading

et al. 2023

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The purpose of this study is to examine the effect of wood aging on the mechanical behavior at the cell-wall level. Synchrotron X-ray diffraction (XRD) measurements were performed to investigate the mechanical behavior of cellulose in the S2 layer of aged wood from a 250-year-old attic cabin beam. XRD measurements under uniaxial loading were performed on the cellulose (004) plane; the results were compared with those of recent wood. The cellulose in aged wood exhibited a delayed response to both tensile and compressive loading compared with recent wood. Under compressive loading, cellulose showed an increase in maximum strain and a significant increase in the variation of cellulose orientation angle, indicating that it may exhibit buckling-like meandering behavior. These results could be explained based on the decrease in hemicellulose content in the cell wall due to wood aging. In other words, the results suggested that an amorphous material in the cell wall affected the mechanical behavior of wood at the cell-wall level.

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XRD investigation of mechanical properties of cellulose microfibrils in S1 and S3 layers of thermally modified wood under tensile loading

Cited by 5 publications

References 22 publications

In Situ Synthesis of Fe3O4 Nanoparticles and Wood Composite Properties of Three Tropical Species

In Situ Synthesis of Fe3O4 Nanoparticles and Wood Composite Properties of Three Tropical Species

Plant cell wall polysaccharides: Methodologies for compositional, structural, and physicochemical characterization

Synchrotron X-ray measurements of cellulose in the cell wall of aged wood under uniaxial loading

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