Induction heating-based low-frequency alternating magnetic field: High potential of ferromagnetic composites for medical applications

Xiang, Ziyin; Ducharne, Benjamin; Schiava, Nellie Della; Capsal, Jean‐Fabien; Cottinet, Pierre‐Jean; Coativy, Gildas; Lermusiaux, Patrick; Le, Minh‐Quyen

doi:10.1016/j.matdes.2019.107804

Cited by 30 publications

(33 citation statements)

References 37 publications

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“…Second, Fe 3 O 4 powders were added and stirring was continued for 1h to achieve a perfectly homogeneous solution ( Figure 1A). The volumetric content of Fe 3 O 4 in the ABS varied from 3% to 30%, which was higher than our prior work [10,18] where the particle composition was limited to 17%. Other studies showed that increasing the magnetic concentration was an easy way to enhance the induction heating performance [19].…”

Section: Materials Fabricationcontrasting

confidence: 67%

“…To generate a significant AC magnetic field excitation, a magnetic inductor was assembled to a DC drill motor at variable speed. Two kinds of magnetic inductors were employed: One consisted of eight cylindrical permanent magnets already mentioned in [10,18], and the other had a double of identical permanent magnets (i.e., 16) as developed in this study (cf. Figure 4a).…”

Section: Methodsmentioning

confidence: 99%

“…This is impossible in the case of RFA [14]. Finally, LFIH is a good alternative treatment to produce minimal undesired effects on patients.Here, we provide additional analysis based on the LFIH effect as well as significant improvements in terms of heating performance with respect to the device reported previously [10]. A target composite made of 17% vol.…”

mentioning

confidence: 93%

“…Here, we provide additional analysis based on the LFIH effect as well as significant improvements in terms of heating performance with respect to the device reported previously [10]. A target composite made of 17% vol.…”

mentioning

confidence: 93%

“…The second effect is Joule heating in any conductive material study was to enhance the LFIH mechanism so that it can match the medical requirements more closely. Several solutions can overcome the technological problems described previously [10], such as increasing the magnetic concentration of the composite up to 30% and increasing the frequency excitation by optimization of inductor design. Satisfactory results have been achieved with an important heating temperature close to 100 • C. These results demonstrate the reliability of the proposed approach.…”

Section: Introductionmentioning

confidence: 99%

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Enhancing the Low-Frequency Induction Heating Effect of Magnetic Composites for Medical Applications

et al. 2020

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This study aims to enhance the low-frequency induction heating (LFIH) effect in a thermoplastic polymer doped with iron oxide magnetic particles, which are promising candidates for several medical applications thanks to their confirmed biocompatibility. Two main approaches were proposed to successfully boost the heating ability; i.e., improving the magnetic concentration of the composite with higher filler content of 30 wt %, and doubling the frequency excitation after optimization of the inductor design. To test the magnetic properties of the ferromagnetic composite, a measurement of permeability as a function of temperature, frequency, and particle content was carried out. Thermal transfer based COMSOL simulations together with experimental tests have been performed, demonstrating feasibility of the proposed approach to significantly enhance the target temperature in a magnetic composite. These results are encouraging and confirmed that IH can be exploited in medical applications, especially for the treatment of varicose veins where local heating remains a true challenge.Polymers 2020, 12, 386 2 of 16 because of the electric currents induced by the fluctuating magnetic field. Both effects result in heating of the treated object, but the second is the main heat source in IH processes.Compared to other classical heating techniques, such as flame heating, resistance heating, and traditional ovens or furnaces, IH offers fast, clean, and precise temperature control in a contactless and efficient way. It is one of the most preferred heating technologies in industrial [2], domestic [3], and medical applications [4]. Although the process parameters in many industrial and domestic applications are already well-known, there are still some issues that need further optimization: heating of low-resistivity materials, accurate heating of biological tissues, faster design for complex IH load geometries, and accurate 3D FEA simulation of the whole IH system [5]. The third major area of IH is medicine, and this field is not as mature as industrial or domestic applications. It has lately attracted a great deal of research interest. IH was initially applied only in manufacturing and sterilization of many surgical instruments because it is a clean, fast, and portable heat source.IH has recently started to be introduced in minimally-invasive hyperthermia as a cancer treatment therapy by inducing a temperatures of about 41-45 • C to the cancerous cells [6,7]. In order to precisely deliver the power to the tumor, a ferromagnetic material is usually placed in the area to be treated. This technique efficiently destroys cancer tissue while minimizing the damage to the surrounding healthy cells. Moreover, this local treatment can markedly reduce pain compared to chemotherapy. The frequencies used for hyperthermia are usually inside the margins of radiofrequency (i.e., hundreds of kHz to few MHz) [8,9] or microwaves (hundreds of MHz to 10 GHz); i.e., non-ionizing radiation frequencies. However, frequencies over 100 kHz can produce signifi...

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Section: Materials Fabricationcontrasting

confidence: 67%

Section: Methodsmentioning

confidence: 99%

mentioning

confidence: 93%

mentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

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Enhancing the Low-Frequency Induction Heating Effect of Magnetic Composites for Medical Applications

et al. 2020

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Thermal and electrical performance analysis of induction heating based‐thermochemical reactor for heat storage integration into power systems

Gassi

Lougou

Baysal

et al. 2021

Intl J of Energy Research

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In this study, the thermal and electrical performance analysis of an induction heating based-thermochemical reactor is investigated for high-temperature heat storage. The induction-heating model is built with Maxwell equations, and the surface-to-surface (S2S) radiation model is used for the induced and diffused thermal energy flow transport in the fluid phase within the reactor inner cavity. The effects of operating and structural parameters in terms of the coil turn number, coil current intensity and frequency, the conductive plate, and the coil's relative permeability, electrical conductivity, and emissivity could affect the heat generation, input power demand, and energy consumption of the proposed reactor performance are sufficiently investigated. It is found that the reactor temperature distribution resulted from the homogenized multi-turn coil magnetomotive force and frequency with the current intensity 48% more effective in reaching the desired temperature at the heat storage medium. However, the conductive plate relative permeability, electrical conductivity, and surface emissivity significantly affect the induction heating system's thermal power, with the relative permeability having the highest impact of 13% in the storage medium's temperature increasing at low current intensity. Moreover, the surface emissivity shows remarkable effects when the inducting heating operates at a high current. Significant energy consumption, more than 159%, is observed when the induction heating generator operates at steady-state mode. The reactor heating region temperature increases when the reactor operating current and frequency get high. It is observed that the more the induced heat was applied to the reactor, the more the reactor is heating up to a steady-state. The instantaneous temperature distribution inside the reactor depicted the rise in the temperature is caused by convection and radiation heat transfer. Higher and more uniform temperature distribution inside the reactor is obtained by optimizing the reactor operating and structural parameters.

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3D Printing of Flexible Composites via Magnetophoresis: Toward Medical Application Based on Low‐Frequency Induction Heating Effect

Xiang

Nguyen

Ducharne

et al. 2021

Macro Materials & Eng

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In this work, a commercial extrusion 3D printer is used to process magnetic pastes into desired 3D structures. The magnetic pastes prepared in the authors' laboratory are mixtures of Fe 3 O 4 (iron oxide), microparticles, and PDMS (polydimethylsiloxane) polymer. After multiple composition tests, they produced pastes compatible with the 3D printer that can be additively manufactured into flexible ferromagnetic samples. The design optimization, together with the characterizations of composites, are investigated. Magnetic particles do not simply mix with the polymer but formed a chain-like structure under the influence of a magnetic field during the printing process. The chain-like structure induces magnetic and thermal anisotropies. The relative permeability and the low-frequency induction heating (LFIH) effect are improved. The authors' development is highly relevant in healthcare applications, especially endovascular ablation for varicose treatment.

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Induction heating-based low-frequency alternating magnetic field: High potential of ferromagnetic composites for medical applications

Cited by 30 publications

References 37 publications

Enhancing the Low-Frequency Induction Heating Effect of Magnetic Composites for Medical Applications

Enhancing the Low-Frequency Induction Heating Effect of Magnetic Composites for Medical Applications

Thermal and electrical performance analysis of induction heating based‐thermochemical reactor for heat storage integration into power systems

3D Printing of Flexible Composites via Magnetophoresis: Toward Medical Application Based on Low‐Frequency Induction Heating Effect

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