At Lab-STICC; IRDL, Arnaud Le Saos-Kauten developed electromagnetic absorbing composites through 3D printing.
Arnaud Le Saos--Kauten, chercheur·e au sein de Lab-STICC; IRDL (Institut National Polytechnique de Bretagne).
Thèse soutenue en 2024 à l'école doctorale École doctorale Science de la Matière, des Molécules et Matériaux (Rennes).
Référencée dans le réseau ABES/STAR, cette thèse répond aux critères de rigueur de l'enseignement supérieur français.
Technological advancements in the field of composite materials are often underestimated; however, they open significant prospects for various sectors. Arnaud Le Saos-Kauten's thesis, conducted at Lab-STICC; IRDL, highlights the importance of the relationships between materials, processes, and properties in the development of electromagnetic absorbers. By focusing on 3D printing, this research addresses a growing need for innovations in the advanced materials sector, particularly for applications in microwave frequencies.
The results obtained, with an absorption measured at 17.9 dB at 6.8 GHz and a bandwidth of 42%, demonstrate the potential of these new composites. These figures are not merely technical data; they represent concrete opportunities for industries seeking to improve their electromagnetic performance. Indeed, the ability to effectively absorb electromagnetic waves is crucial in fields such as telecommunications, aerospace, and defense. For example, in the telecommunications sector, more efficient antennas can reduce interference and improve signal quality, which is essential in an increasingly connected world.
However, challenges remain. The compatibility of 3D printing materials with electromagnetic absorption requirements remains a major obstacle. Current formulations do not always meet the required performance standards. Research has identified scientific locks, notably the incompatibility of filaments and the limitations of the performance of materials available on the market. This raises questions about the durability and reliability of finished products, which must withstand extreme conditions, particularly in aerospace where materials must face variations in temperature and pressure.
To overcome these challenges, it is imperative to optimize printing guidelines and explore new material formulations. For example, the integration of nanoparticles into polymer matrices could enhance absorption properties while maintaining the lightness and flexibility of the composites. The recommendations from this thesis emphasize the need for ongoing research and targeted development to improve the processability and performance of composites. Decision-makers must recognize the importance of supporting this research to foster innovation in the field of advanced materials.
Furthermore, the impact of this research is not limited to improving technical performance. The economic implications of these advancements are significant. Indeed, the ability to develop more efficient materials can reduce production costs and increase the competitiveness of companies in the international market. For example, companies in West Africa could benefit from these innovations to develop local solutions tailored to the specific needs of the region while reducing their dependence on imports.
In conclusion, this thesis is not limited to academic results. It paves the way for concrete applications that could transform entire sectors. The economic implications of these advancements are significant, and it is crucial that market players and decision-makers commit to supporting this research to fully capitalize on it. By investing in these technologies, we can not only improve our technological infrastructure but also create jobs and stimulate the local economy, particularly in regions like Benin, where industrial development is still in the emerging phase. Thus, the future of composite materials and 3D printing looks promising, but it requires a collective commitment to overcome challenges and realize its full potential.
Données clés
- 17,9 dB : mesure de l'absorption électromagnétique à 6,8 GHz pour un composite spécifique
- 42% : bande-passante de l'absorbant à incidence normale
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Sources et accès
Arnaud Le Saos--Kauten. Etude des relations matériaux-procédés-propriétés pour l'élaboration d'absorbants électromagnétiques composites mis en forme par impression 3D. Science des matériaux [cond-mat.mtrl-sci]. Université de Bretagne occidentale - Brest, 2024. Français. ⟨NNT : 2024BRES0055⟩. ⟨tel-04975221⟩