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<p>Bilayer MXene@Cu and trilayer MXene@Cu@PPy nanocomposites were synthesized for lightweight, thin X-band (8–12&#xa0;GHz) electromagnetic wave absorbers. Ti<sub>3</sub>AlC<sub>2</sub> MAX phase was prepared via molten-salt synthesis at 1050&#xa0;°C, etched with HF to yield Ti<sub>3</sub>C<sub>2</sub>Tₓ MXene nanosheets, then loaded with Cu (0.5–4&#xa0;mol%) via precipitation, and coated with PPy through in-situ polymerization. Low Cu loadings in MXene@Cu enabled optimal conductivity, strong interfacial polarization, and impedance matching (|Zin/Z0| ≈ 1), yielding high reflection loss (RL). High Cu disrupted matching, weakening absorption. PPy addition in ternary NCs increased polarization interfaces, stabilized conductivity, enhanced matching, and boosted dielectric/magnetic losses, improving RL across Cu ratios. Analysis of permittivity, permeability, attenuation, and Cole–Cole plots confirms balanced conductivity, polarization, magnetic loss, and matching as key to superior performance. This MXene–metal–polymer design advances broadband EMWA materials.</p>

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MXene@Cu@PPy nanocomposites with enhanced electromagnetic response

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年6月22日

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  • Mohammad Ali Fahidazar,
  • Seyyed Salman Seyyed Afghahi,
  • Morteza Beyranvand

摘要

Bilayer MXene@Cu and trilayer MXene@Cu@PPy nanocomposites were synthesized for lightweight, thin X-band (8–12 GHz) electromagnetic wave absorbers. Ti3AlC2 MAX phase was prepared via molten-salt synthesis at 1050 °C, etched with HF to yield Ti3C2Tₓ MXene nanosheets, then loaded with Cu (0.5–4 mol%) via precipitation, and coated with PPy through in-situ polymerization. Low Cu loadings in MXene@Cu enabled optimal conductivity, strong interfacial polarization, and impedance matching (|Zin/Z0| ≈ 1), yielding high reflection loss (RL). High Cu disrupted matching, weakening absorption. PPy addition in ternary NCs increased polarization interfaces, stabilized conductivity, enhanced matching, and boosted dielectric/magnetic losses, improving RL across Cu ratios. Analysis of permittivity, permeability, attenuation, and Cole–Cole plots confirms balanced conductivity, polarization, magnetic loss, and matching as key to superior performance. This MXene–metal–polymer design advances broadband EMWA materials.