Due to the growing severity of electromagnetic radiation pollution, effective and absorption-dominated electromagnetic shielding materials must be developed. In this study, poly(arylene ether nitrile)/ graphene/carbon nanotube (PEN/G/CNT) composite foam was prepared by nonsolvent induced phase separation, and Fe 3 O 4 particles were grown in situ by co-precipitation method, obtaining PEN/G/ CNT/Fe 3 O 4 (GCF) composite foams. The successful incorporation of magnetic Fe 3 O 4 particles was demonstrated by the scanning electron microscope images and the hysteresis loops, which was proved to effectively reduce the impedance mismatch and enhance the dielectric losses and magnetic losses of the composite foams, resulting in improved absorption and reduced secondary electromagnetic pollution. The electromagnetic interference shielding effectiveness (EMI SE) of GCF composite foams rose with the increase of Fe 3 O 4 content and GCF with the Fe 3 O 4 concentration of about 3.55 wt % showed the highest EMI SE of around 38 dB and the highest absorption ratio of about 94%. This effort provides a feasible and effective pathway for the fabrication of lightweight, easily scalable, heat-resistant, and absorption-dominated EMI shielding materials.

Metrics & MoreArticle Recommendations * sı Supporting Information I n our original article (https://pubs.acs.org/doi/full/10. 1021/acsanm.3c00925), an error in data was found in Table S1. According to the data in Figure 5F, the char yield of PEN should be 48.28%, but unfortunately, in Table S1, the char yield of PEN was given as 54.52%. We apologize for any convenience this has caused.In addition, the description on page 7807 in the original article related to this topic is as follows: "In comparison, the TGA curves for pure PEN, G, and GC composite foams only show a weight loss region at 470−600 °C and lower char yield." It can be seen that the correction in data would not affect the discussions and conclusions of the article, so the description will not be modified. ■ ASSOCIATED CONTENT * sı Supporting InformationThe Supporting Information is available free of charge at https://pubs.acs.org/doi/10.1021/acsanm.3c03489.Same description as in the original article (PDF)