The orientation and inhomogeneous distribution of carbon nanofibers and distinctive internal structure in polymer composites induced by 3D-printing enabling electromagnetic shielding regulation

Mechanical, Thermal, and Electrical Properties on 3D Printed Short Carbon Fiber Reinforced Polypropylene Composites

“…The scattering parameters (S-parameters) of the disk 3D printed samples (22.5 × 10 × 1 mm 3 ) were measured through the waveguide transmission line method using a vector network analyzer (VNA, N5224B, Agilent Technologies Group Ltd.) in the 8.2–12.4 GHz region (X-band). The electromagnetic interference shielding effectiveness (EMI SE) can be calculated by satisfying the following eqs ∼: , R = false| S 11 false| 2 = false| S 22 false| 2 T = false| S 21 false| 2 = false| S 12 false| 2 A = 1 − R − T SE R = 10 log ( 1 1 − R ) SE A = 10 log ( 1 − R T ) SE T = SE R + SE A = 10 log ( 1 T ) where R , A , and T are the reflection coefficient, absorption coefficient, and transmission coefficient, respectively.…”

“…18−22 3D printed into electromagnetic interference (EMI) shielding parts. 23 The morphology characteristics of the reinforcing components, such as orientation and length, have a strong impact on the performance of composite products. 14,20 Almeshari et al 24 prepared short carbon fiber-reinforced PP composites using FDM-3D printing technology and studied the relationship between the morphology characteristics of carbon fibers and the mechanical properties of the composites.…”

Advancements in 3D-printed architectures for electromagnetic interference shields

“…A three-dimensional structure electromagnetic shield typically involves embedding a matrix material with conductive llers, thereby establishing a conductive network to achieve electromagnetic shielding, [108][109][110][111][112] as depicted in Fig. 3.…”

Optimization of CoFe2O4 nanoparticles and graphite fillers to endow thermoplastic polyurethane nanocomposites with superior electromagnetic interference shielding performance

“…Therefore, the value of conductivity was reduced at higher fraction loading of CoFe 2 O 4 nanoparticles. 73,74 4.6.4 Complex permeability. The real part of the permeability m 0 and the imaginary part of permeability m 00 of the developed nanocomposites have been analyzed at room temperature, to assess the EM wave absorbing performances as a function of frequency as displayed in Fig.…”