Improvement in Mechanical Properties and Electromagnetic Interference Shielding Effectiveness of PVA‐Based Composites: Synergistic Effect Between Graphene Nano‐Sheets and Multi‐Walled Carbon Nanotubes

Abstract

In this study, polyvinyl alcohol (PVA)/graphene nano-sheets (GNs) composites are produced via solution mixing and melt compounding methods, where multi-walled carbon nanotubes (MWCNTs) are added during process. After that, the test results show that PVA/GNs composites composed of 0.25 wt% GNs possess the optimal tensile strength, while the others composed of 2 wt% GNs have a higher thermal stability, electrical conductivity, and electromagnetic interference shielding effectiveness (EMI SE). The addition of MWCNTs provides the PVA/GNs composites with better synergy that can enhance the tensile properties, thermal stability, electrical conductivity, and EMI SE of composites. In comparison to the melt compounding method, the solution mixing method can yield improved properties.

3D Printing of Delicately Controllable Cellular Nanocomposites Based on Polylactic Acid Incorporating Graphene/Carbon Nanotube Hybrids for Efficient Electromagnetic Interference Shielding

“…However, when the EMI shielding effectiveness is further evaluated among different hybrid fillers, the hybrids of 2D graphene nanoplates/1D carbon nanotubes (GNPs/CNTs) proved to exhibit significant advantages in achieving the high shielding performance of materials at a low filler loading due to their unique nanostructure and excellent electrical property. 29−32 For example, Lou et al 31 realized the desired EMI shielding property for commercial application through preparation of PVA/GNPs/CNTs composites with only 1.5 wt % hybrids. Besides, Yan et al 32 manipulated a segregated structure in the graphite/carbon nanotubes/UHMWPE composites with 4 wt % hybrids, achieving an EMI shielding property of 41.8 dB.…”

“…To overcome the above challenge and prepare the desired materials, the multidimensional hybridization with the other different functional fillers could be an effective and easily operational strategy, e.g., hybridizing with 1D metal nanowire, 1D carbon nanotubes, − or 2D-MXene. , These multidimensional hybrid filler networks would endow the materials with the expected excellent comprehensive performance. However, when the EMI shielding effectiveness is further evaluated among different hybrid fillers, the hybrids of 2D graphene nanoplates/1D carbon nanotubes (GNPs/CNTs) proved to exhibit significant advantages in achieving the high shielding performance of materials at a low filler loading due to their unique nanostructure and excellent electrical property. − For example, Lou et al realized the desired EMI shielding property for commercial application through preparation of PVA/GNPs/CNTs composites with only 1.5 wt % hybrids. Besides, Yan et al manipulated a segregated structure in the graphite/carbon nanotubes/UHMWPE composites with 4 wt % hybrids, achieving an EMI shielding property of 41.8 dB.…”

Characterization and Microstructure of Linear Electrode-Electrospun Graphene-Filled Polyvinyl Alcohol Nanofiber Films

“…Aluminum foils use the reflection mechanism to debilitate the energy of electromagnetic waves, and the adhered PVA/GR nanofiber films have a porous structure, which is able to debilitate the incident waves via the multi-reflection [ 49 ]. In addition, the PVA/GR nanofiber films possess conductivity, and the electrically conductive composites can undermine electromagnetic waves via energy dissipation [ 50 ].…”

Strong and Flexible Carbon Fiber Fabric Reinforced Thermoplastic Polyurethane Composites for High‐Performance EMI Shielding Applications

“…Conductive polymer composites (CPCs) have many attractive properties, such as low‐cost, lightweight, chemical stability, flexibility, easy processing, which make them become promising candidates for electromagnetic interference (EMI) shielding applications. [ 5–9 ] Particularly, CFs and their composites have been widely used owing to their excellent electrical properties, high thermal stability, high specific strength, and specific modulus. [ 10–12 ] A number of researches have been carried out to study the EMI shielding of CFs.…”