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Open AccessArticle

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

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Univ. Lyon, INSA-Lyon, Electrical Department, LGEF, Ladoua Campus, EA682, F-69621 Villeurbanne, France
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HYBRIA Institute of Business and Technologies, Écully Campus, 69130 Écully, France
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Université Claude Bernard Lyon 1 (Univ Lyon), 8 Avenue Rockefeller Lyon, F-69621 Villeurbanne, France 
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Groupement Hospitalier Edouard Herriot, 69003 Lyon, France
*
Author to whom correspondence should be addressed.
Polymers 2020, 12(2), 386; https://doi.org/10.3390/polym12020386
Received: 3 January 2020 / Revised: 30 January 2020 / Accepted: 5 February 2020 / Published: 8 February 2020
(This article belongs to the Section Polymer Applications)
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.
Keywords: ferromagnetic composites; magnetic particles; hysteresis loss; low-frequency induction heating; thermal stability; thermal transfer modeling; treatment in varicose veins; medical applications ferromagnetic composites; magnetic particles; hysteresis loss; low-frequency induction heating; thermal stability; thermal transfer modeling; treatment in varicose veins; medical applications
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MDPI and ACS Style

Xiang, Z.; Jakkpat, K.-I.; Ducharne, B.; Capsal, J.-F.; Mogniotte, J.-F.; Lermusiaux, P.; Cottinet, P.-J.; Schiava, N.D.; Le, M.Q. Enhancing the Low-Frequency Induction Heating Effect of Magnetic Composites for Medical Applications. Polymers 2020, 12, 386.

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