Wood construction and magnetic characteristics of impregnated type magnetic wood

Oka, Hideo; Hojo, Atsushi; Seki, K.; Takashiba, Toshio

doi:10.1016/s0304-8853(01)00684-9

Cited by 27 publications

(16 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The magnetite has been proposed for this application with the advantages of its biocompatibility and easy synthetic process [35]. The fabrication and characterization of magnetic composites based on wood were reported [36][37][38], which showed that the magnetic wood offered excellent performances such as easy to be heated, electromagnetic wave absorption, paramagnetic, wooden texture, easy to be processed, and humidity control functions. Therefore, magnetic treatment endowed the lignocellulosic fiber based composites with new functions and expands their applications.…”

Section: Introductionmentioning

confidence: 99%

Dual-functional natural-fiber reinforced composites by incorporating magnetite

Xia

Wang

Dong

et al. 2016

Composites Part B: Engineering

View full text Add to dashboard Cite

Natural fiber reinforced composites with dual-functional properties, including electromagnetic shielding and paramagnetic functions, as well as improved water-resistant property, were fabricated using vacuum assisted resin transfer molding (VARTM) process. Magnetite particles were firstly mixed with kenaf fibers to form a mat, followed by resin intrusion and compression for the composite fabrication. The obtained kenaf fiber/magnetite/polyester composites were endowed with electromagnetic shielding and paramagnetic properties, without compromising the mechanical properties. When 35.2% magnetite was incorporated into the composites, the electromagnetic interference shielding effectiveness reached 79.2% with the range 8 to 12 GHz, and the saturation magnetization was 29.2 emu g -1 . The 24-hour thickness swelling and water absorption of the composites after introducing magnetite were drastically reduced from 19.7% and 18.3% to 2.4% and 2.6%, counting as the decreases of 87.6% and 73.4%, respectively. It was indicated that the water resistance of the composite was improved significantly.

show abstract

Section: Introductionmentioning

confidence: 99%

Dual-functional natural-fiber reinforced composites by incorporating magnetite

Xia

Wang

Dong

et al. 2016

Composites Part B: Engineering

View full text Add to dashboard Cite

show abstract

“…77 Early works of Oka et al report on the simple pressure impregnation of wood and wood materials with aqueous magnetite particle dispersions proposing applications of the magnetized wood materials in electromagnetic shielding, actuation or induction heating. [78][79][80] The potential of magnetic wood as induction heating material was recently investigated by Gan and coworkers, by measuring a temperature rise of the magnetic wood from $20 C to $70 C in 10 min at a low frequency magnetic eld. In addition the magnetic wood acts as a thermal insulator due to the low thermal conductivity.…”

Section: Magnetic Cellulose Materials and Woodmentioning

confidence: 99%

Nanofibrillated cellulose composites and wood derived scaffolds for functional materials

2019

View full text Add to dashboard Cite

show abstract

“…As a result, the society urgently needs electromagnetic wave (EMW) absorbing materials with light weight, thin thickness, wide effective absorbing band width, and strong absorption capacity [ 1 , 2 , 3 , 4 ]. These absorbers include polymer composites with low conductive nanoparticles [ 5 , 6 ], polymer composites with metallic nanoparticles [ 7 ], composites containing glass coated microwires [ 8 , 9 ], thin film based composites [ 10 , 11 ], magnetic cellulose [ 12 ], and magnetic wood [ 4 , 13 ].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Magnetic Wood Fiber Board and Corresponding Multi-Layer Magnetic Composite Board, with Electromagnetic Wave Absorbing Properties

et al. 2018

View full text Add to dashboard Cite

With the rapid growth in the use of wireless electronic devices, society urgently needs electromagnetic wave (EMW) absorbing material with light weight, thin thickness, wide effective absorbing band width, and strong absorption capacity. Herein, the multi-layer magnetic composite boards are fabricated by hot-pressing magnetic fiber boards and normal veneer layer-by-layer. The magnetic fibers obtained using in-situ chemical co-precipitation are used to fabricate magnetic fiber board by hot-pressing. The magnetic wave absorbing capacities of the magnetic fiber boards obtained with 72 h impregnation time exhibit strongest adsorption capacities of −51.01 dB with a thickness of 3.00 mm. It is proved that this outstanding EMW absorption property is due to the strongest dielectric loss, the optimal magnetic loss, and the dipole relaxation polarization. Meanwhile, the EMW absorbing capacities of the corresponding multi-layer composite magnetic board increases from −14.14 dB (3-layer) to −60.16 dB (7-layer). This is due to the generated multi-interfaces between magnetic fiber board and natural wood veneer in the EMW propagation direction, which significantly benefit multireflection and attenuation of the incident waves. The results obtained in this work indicate that natural wood fibers are of great potential in the fabrication of magnetic multi-layer boards treated as EMW absorbers via a low cost, green, and scalable method.

show abstract

Wood construction and magnetic characteristics of impregnated type magnetic wood

Cited by 27 publications

References 4 publications

Dual-functional natural-fiber reinforced composites by incorporating magnetite

Dual-functional natural-fiber reinforced composites by incorporating magnetite

Nanofibrillated cellulose composites and wood derived scaffolds for functional materials

Synthesis of Magnetic Wood Fiber Board and Corresponding Multi-Layer Magnetic Composite Board, with Electromagnetic Wave Absorbing Properties

Contact Info

Product

Resources

About