Snake Scale-Inspired Poly(vinylidene fluoride)/Ti3CNT (x) @Polypyrrole Coatings for Ultrawide-Bandwidth Microwave and Visible Light Absorption

The accuracy of data collected by optical instrumentscan be greatlyimpacted by radar band electromagnetic waves (EM) and scattered visiblelight. Traditional electromagnetic-wave-absorbing (EMA) materialsface challenges in effectively attenuating electromagnetic waves withinthe visible light spectrum. To address this issue, a structural engineering-basedassembly strategy was developed to construct PVDF/Ti3CNT (x) @PPyNF composites with multiple heterogeneousinterfaces, inspired by snake scales. And through the self-dopingof N elements and the coating process, the material finally exhibitsexcellent microwave and visible light absorption properties. Thisapproach generates multiple polarization losses of electromagneticwaves, enabling the material to exhibit excellent electromagneticwave absorption performance. Specifically, the PVDF/Ti3CNT (x) @PPyNF composite, containing 5 wt% Ti3CNT (x) @PPyNFs, demonstratesexceptional microwave absorption performance, with a minimum reflectionloss of -65.5 dB and an effective absorption bandwidth of upto 6.95 GHz. Additionally, the composite coating exhibits 97.4% visiblelight absorption performance, providing a promising solution to thechallenges of protecting against complex electromagnetic environments.