2026-10-14T11:48:23Z https://www.scidb.cn/oai

10.57760/sciencedb.j00125.00168 2026-05-21T13:59:45Z

2026-05-21 In situ synthesis of free-standing carbon nanotube buckypaper/Fe3O4/polyaniline ternary nanocomposite films as high effective electromagnetic shielding material doi:10.57760/sciencedb.j00125.00168 en A balance between electrical and magnetic properties is critical for electromagnetic shielding materials to achieve excellent electromagnetic interference (EMI) shielding and attenuation effectiveness across a broad frequency range. We have prepared free-standing buckypaper films (BPFP) decorated with Fe₃O₄ particles and polyaniline (PANI)by a simple two-step method to meet this requirement. First, buckypaper films decorated with Fe3O4 (BPF) were synthesized by the coprecipitation of Fe2+/Fe3+ ions on buckypaper (BP) which was then coated with a polyaniline layer by the in situ polymerization of aniline monomers. Magnetic characterization revealed that the BPF and BPFP films had saturation magnetization (Ms) values of 14.3 emu g−1 and 13.0 emu g−1, respectively, confirming retention of the magnetic phase. The addition of Fe3O4 nanoparticles and polyaniline to BP increased both the magnetic and dielectric losses due to the increased interfacial polarizations and anisotropy energy. 40 µm-thick BPF and BPFP films had an absorption-dominated shielding effectiveness of 35.1 dB and 36.4 dB, respectively, across the 5.85-18 GHz frequency band. These values are respectively 12.9% and 17.0% greater than that of pristine BP, highlighting the positive effect of Fe3O4-PANI heterostructures on electromagnetic wave dissipation. These films also had the tensile strength, flexibility, and lightness of BP, demonstrating exceptional promise for next-generation electromagnetic shielding materials. The particles and the polyaniline are NOT in the BP. Yes, it is on the surface rather than inside. This abbreviation has not been defined. What is PANI? I think it may be the same as P. You must be more careful with your use of abbreviations. Thank you for your feedback. The abbreviation PANI has now been defined upon its first mention in the text. Buckypaper; Fe3O4 nanoparticles; In situ polymerization; Polyaniline; Electromagnetic interference 巩岱轩 RESTRICTED dataset Science Data Bank