Facile Strategy To Prepare Light-Weight PVA Membrane Based on Schiff Base Derivatives and MWCNTs for Electromagnetic Wave Absorption

摘要

The carbon-nanotube-doped Schiff bases (CDSBs) and their iron complexes (CDSI) Were synthesized by the in situ polymerization and coordination reaction. The phase structure and morphology of the samples were investigated by X-ray diffraction analysis and field emission scanning electron microscopy. In particular, it can be-found that the diamagnetic sub-stance CDSF turn's, into paramagnetic. CDSI after doping Fe3+ Furthermore, :the eminent electrical conductivity and microwave electromagnetic loss behavior of CDSI shed light on organic-metal ion complexes (OMICs) as a promising-lightweight absorbent. The feasibility of this strategy was, demonstrated by the successful fabrication of the CDSI/MWCNTs/PVA composites membrane. The reflection loss (RL) of the electromagnetic wave arrives at the lowest value -18.6 dB at 10.32. GHz, and the effective bandwidth (RL below -10 dB) could reach 5.8 GHz (8.1 to 13.04 GHz) with the thickness of 0.54 mm and the surface density of 0.44 kg/m(2). Such excellent low weight, low thickness, and broadband electromagnetic wave absorption membrane may pave the way for new applications of OMIC-derived materials.