| Abstract:In this study, two kinds of paper-based composite, single-walled carbon nanotubes paper (SP) and multi-walled carbon nanotubes paper (MP) were prepared by wet molding method, using meta-aramid fiber and pulp as matrix, meta-aramid fiber and pulp as matrix, and single- walled carbon nanotubes (SWNT) and multi- walled carbon nanotube (MWNT) as fillers. The effects of the amount and type of carbon nanotubes added on paper' s conductive properties, dielectric properties, electromagnetic shielding effectiveness, and electromagnetic wave reflection, absorption and transmission properties were studied. Research results show that the percolation thresholds of surface and volume conductivity of SP are 0.16wt.% respectively, and that of MP are 0.37wt.% and 0.93wt.% respectively; at the same addition amount, SP has higher conductivity and dielectric properties than MP. Constant real part, dielectric loss and electromagnetic wave absorption rate; SP's electromagnetic shielding effectiveness reaches 27dB at 8-12GHz (thickness 0.15mm). |