Magnetic Wood as an Effective Induction Heating Material: Magnetocaloric Effect and Thermal Insulation

Abstract

An effective induction heating material composed of wood and magnetic Fe3O4 particles is prepared via a simple hydrothermal method. Fe3O4 particles deposit on the porous wood substrate provides excellent magnetic properties and high magnetothermal conversion resulting in rapid increase in the temperature at the wood substrate. Benefiting from the effective magnetocaloric effect of magnetic particles, the temperature of magnetic wood exhibits a noticeable rise (from 25.9 to 70.1 °C in 10 min) at low‐frequency magnetic field. For simulating the real environment, the indoor temperature rise of magnetic wooden model also reveals the excellent heating performance of magnetic wood. Besides, the magnetic wood also serves as a thermal insulator to slow down the transport of thermal energy from the high temperature area to its surroundings due to its low thermal conductivity, which benefit the rational use of thermal energy in daily life. In view of highly scalable, simple operation, good durability, excellent magnetic properties, effective magnetocaloric effect, and thermal insulation, the novel magnetic wood composite demonstrated here is an attractive induction heating material for application in building, decoration, and massage furniture.

Induction Heating in Nanoparticle Impregnated Zeolite

“…On the other hand, the use of nanoparticles for induction heating under radiofrequency fields has been shown to be very useful for different catalytic processes [ 17 ] such as heterogeneous catalysis, chemical reactions in organic or inorganic media [ 18 , 19 ], water electrolysis [ 20 ] and others [ 21 , 22 , 23 , 24 ]. The induction heating by magnetic nanoparticles is mainly focused on the advantages of this approach in terms of process intensification, energy efficiency, etc.…”

Formation of Chitosan/Sodium Phytate/Nano-Fe3O4 Magnetic Coatings on Wood Surfaces via Layer-by-Layer Self-Assembly

“…The magnetization saturation values (Ms) of sodium phytate/nano-Fe 3 O 4 1, 5, and 10 bilayers on chitosan-wood revealed that more assembled layers of Fe 3 O 4 nanoparticles on the wood surface improved the magnetic properties. The saturation magnetization of magnetic wood was lower than that of pure Fe 3 O 4 nanoparticles [27], likely due to the presence of the nonmagnetic wood substrate.…”

Nanofibrillated cellulose composites and wood derived scaffolds for functional materials

“…In addition the magnetic wood acts as a thermal insulator due to the low thermal conductivity. 81 In a further study, they showed the improved UV resistance and dimensional stability of magnetic wood composites. 82 A more detailed study on magnetized wood, in terms of distribution, penetration depth and colloidal characteristics, was reported by Merk et al 83 Iron oxide magnetite and maghemite were in situ synthesized within the bulk wood structure by a co-precipitation process of ferric and ferrous salts in aqueous media with alkaline solutions.…”