Highly anisotropic MXene@Wood composites for tunable electromagnetic interference shielding

Ionic liquid-dispersed PDMS/SWCNT/Ag@Ni hybrid composite for temperature- and pressure-sensitive smart electromagnetic shielding applications

“…7. For comparison, the thermally tunable absorption shielding values of this study at 100 1C surpass the SE values of recently published externally tunable composite systems 4,5,9,[31][32][33][34][35][36][37][38][39] and green shielding composite systems, 25,[40][41][42][43][44][45] as listed in Table 2. Additionally, KIL3 at 100 1C also exhibited the highest green index value of B101 reported to date in the literature, 25,[40][41][42][43][44][45] as shown in Table 2.…”

Anisotropic Shape Memory Composite for Dynamically Adjustable Electromagnetic Interference Shielding

“…Moreover, the induced surface current of GFF creates a perpendicular magnetic field, generating an opposite electromotive force. This counter-electromotive weakens the external electric field and dissipates microwave energy to heat, particularly when the surface current and external electric field are parallel. ,, As a result, the maximum SE T and SE A are observed when the direction of the electric field in the electromagnetic wave is parallel to the graphene fibers (0°). In addition, it is worth noting that the sandwich structure of the GFF/EVA composite enables the multiple reflections of electromagnetic waves in the composite, which lengthens the transmission path of electromagnetic waves and facilitates electromagnetic wave absorption, resulting in effective EMI shielding …”

“…Electromagnetic interference (EMI) shielding materials with a dynamically adjustable performance are highly desirable for complex applications in novel communication and electronic instruments. − Nevertheless, ordinary EMI shielding materials show constant shielding performance, which is determined by the nonadjustable electromagnetic parameters. , In comparison, the smart EMI shielding materials that enable dynamical modulation of EMI shielding performance by structural changes have been envisioned to facilitate the manipulation of electromagnetic waves in various applications. − …”

“…Moreover, an anisotropic internal conductive network of EMI shielding composite could be facilely fabricated by the orientation of magnetic conductive fillers in a magnetic field, such as liquid metal and graphene-decorated Fe 3 O 4 nanoplatelets. , In addition, natural materials with anisotropic structures were utilized as templates to fabricate the anisotropic EMI shielding material. Wei et al prepared an anisotropic MXene@wood composite by coating the surface of natural wood with MXene. Benefiting from the intrinsically aligned microchannel structure of wood, the composite displayed convenient regulation of shielding effectiveness in the range from 27.4 to 57.6 dB by rotation.…”

Carbonized Wood/Nickel Nanoparticle Composites with Oriented Channels for Enhanced Electromagnetic Interference Shielding

“…For poplar wood, carbonized wood with a 40% compression ratio has better shielding properties than carbonized wood with a 20% compression ratio . Furthermore, angle modulation attracted wide attention, and the EMI shielding properties of MXene-coated natural wood and carbonized balsa wood were regulated by a rotating grain-electric field angle. , Besides, the electromagnetic wave absorption performance of NiCO@CFs elastomer could be adjusted by the orientation angles, causing a minimum reflection loss of −55.15 dB . However, studies on how the orientation angle of carbonized wood affects EMI shielding properties are still absent in the current field.…”