Dual-Control strategy of structure and polarization for tunable electromagnetic wave absorption in the S-Ku band

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 161193 - 161193

Published: March 1, 2025

Language: Английский

Controllable Ultrathin Thickness of Carbon Nanotubes Layers and Ultralow Equivalent Content in Alternating PMMA‐Based Nanocomposites for Optimized Impedance Matching to Achieve Wideband Electromagnetic Absorption

Small, Journal Year: 2025, Volume and Issue: unknown

Published: May 5, 2025

Abstract Traditional polymer‐based nanocomposites for electromagnetic wave absorption (EMWA) often require high filler content, which limits their mechanical durability and practical applications. In this study, a novel strategy is proposed, meticulously designed fabricated using an innovative exponential unit stacking approach, to construct alternating structure in polymethylmethacrylate (PMMA)/carbon nanotubes (CNTs) nanocomposites, achieving “two birds, one stone” benefits: precise controlling of ultrathin thickness CNTs layers ultralow equivalent content high‐performance EMWA. Notably, with macroscopic 2.0 mm mass fraction 1 wt.%, the 64‐unit sample features PMMA/CNTs µm, minimal reflection loss value −17.33 dB effective bandwidth 1.28 GHz at X‐band, significantly outperforming single‐unit RL min −4.19 no EAB. Both theoretical simulations experimental results demonstrate that enhanced EMWA performance attributed optimized impedance matching, even by constructing structure. This strategy, rooted heterostructure interface engineering, achieves wideband while robust multilayer film stack, paves way advanced cost‐effective applications protection.

Language: Английский

Advances in three-dimensional porous carbon-based wave-absorbing materials: from preparation strategies, structural design, and component regulation to multifunctionality

Journal of Materials Chemistry C, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

The review describes the wave-absorption principles, preparation strategies, structural design, component modulation and multifunctionality of 3D porous carbon-based materials as well discusses their challenges future research directions.

Language: Английский