Bio-Based Eucommia ulmoides Gum Composites with High Electromagnetic Interference Shielding Performance

Abstract

Herein, high-performance electromagnetic interference (EMI) shielding bio-based composites were prepared by using EUG (Eucommia ulmoides gum) with a crystalline structure as the matrix and carbon nanotube (CNT)/graphene nanoplatelet (GNP) hybrids as the conductive fillers. The morphology of the CNT/GNP hybrids in the CNT/GNP/EUG composites showed the uniform distribution of CNTs and GNPs in EUG, forming a denser filler network, which afforded improved conductivity and EMI shielding effect compared with pure EUG. Accordingly, EMI shielding effectiveness values of the CNT/GNP/EUG composites reached 42 dB in the X-band frequency range, meeting the EMI shielding requirements for commercial products. Electromagnetic waves were mainly absorbed via conduction losses, multiple reflections from interfaces and interfacial dipole relaxation losses. Moreover, the CNT/GNP/EUG composites exhibited attractive mechanical properties and high thermal stability. The combination of excellent EMI shielding performance and attractive mechanical properties render the as-prepared CNT/GNP/EUG composites attractive candidates for various applications.

Porous Eucommia ulmoides Gum Monoliths Prepared via Modified Pickering High Internal Phase Emulsion Method

“…Recently, many researches have focused on improving the performance of EUG materials with physical blending and chemical modifications. Nanoparticles and nanofibers can be introduced into the EUG matrix as a reinforcement to not only enhance mechanical properties but also endow EUG with novel functions including oil–water separation, electromagnetic interference shielding, − and photothermal conversion . Compared with pure EUG materials, the tensile strength, elongation at break, and Young’s modulus of 4% nanocrystalline cellulose/EUG nanocomposites were increased by 93.8, 180.1, and 24.0%, respectively .…”

Research Progress on Two-Dimensional Layered MXene/Elastomer Nanocomposites

“…Various nanofillers are being applied to elastomers, such as carbon materials, including conductive carbon black, carbon nanotubes (CNTs), graphene, nanosilica, metal oxides, hexagonal boron nitride, layered double hydroxide, transition metal dichalcogenide, and 2D transition metal carbon/nitrogen/carbon nitride (MXene) [ 2 , 3 , 4 , 5 ]. Elastomers have shown diversity after composition with one or more nanomaterials [ 6 , 7 , 8 ].…”