Pyramid-like magnetic carbon composites device toward tunable and adaptive radar-visible compatible properties

• Published in: Carbon (New York) 2025-01, Vol.231, p.119737, Article 119737
• Main Authors: Guo, Shennan, Tan, Shujuan, Zhang, Ximing, Huang, Xinghan, Ji, Guangbin
• Format: Article
• Language: English
• Subjects: 4D printing; Carbon nanotubes; Microwave absorption; Radar-visible compatible; Visible light modulation
• ISSN: 0008-6223
• DOI: 10.1016/j.carbon.2024.119737

Equipped with intelligent adjustable electromagnetic-visible light compatibility characteristics is of significant importance in military stealth fields. In this work, a tunable microwave absorption and visible light change metamaterial based on polylactic acid (PLA) thermal stimulation was fabricated using 4D printing technology with hydroxylated carbon nanotubes (CNTOH) and carbonyl iron powder (CIP) as active ingredients. The printing filament was synthesized, which exhibited excellent absorption performance with a bandwidth of 5.83 GHz and sufficient shape recovery ability. On this basis, a temperature-dominated shape memory variation cone device was also manufactured and the visible light color-changing coating was sprayed. The microwave absorption performance is adjusted according to the petal angle, achieving a bandwidth variation of 5.9–9.8 GHz. This work confirms the potential exploratory value of the designed shape memory polymer in the field of microwave absorption, and provides unlimited possibilities for designing intelligent controlled stealth materials. This work involves processing carbon based materials for microwave absorption and shape memory, designing microstructures with tunable stealth bands, and manufacturing variant pyramid equipment. This equipment displays excellent microwave absorption tuning function and dynamically changes camouflage color, achieving compatible intelligent adjustment. [Display omitted]