Polybenzimidazole thermal management composites containing functionalized boron nitride nanosheets and 2D transition metal carbide MXenes

MXene/Polymer Membranes: Synthesis, Properties, and Emerging Applications

“…Compared with the binary membrane, the BaTiO 3 /Ti 3 C 2 /PVDF membrane showed significantly improved electric properties due to their complicated interphases and enhanced interface polarization. As reported by Liu et al, the agglomeration of two-dimensional flakes can be prevented by the synergistic effect between functionalized boron nitride nanosheets (f-BNNS) and Ti 3 C 2 (Figure c) . Interestingly, interspace-filling and bridging phenomena were observed in the f-BNNS-Ti 3 C 2 /PBI film, which facilitated the f-BNNS-Ti 3 C 2 /PBI membrane much higher thermal conductivity and mechanical property than those of neat PBI films.…”

“…In contrast, the ex situ blending approaches are more commonly applied since it is easy to control the properties of polymer and MXene precursors. , Taking the advantages of their relatively weak interactions such as van der Waals attraction, hydrogen bonding force and electrostatic interaction, MXene/polymer composites are mainly fabricated by solution mixing (Figure ). So far, a lot of polymers have been applied in the fabrication of MXene/polymer composites, such as poly­(vinyl alcohol) (PVA), ,,− poly­(ethylene oxide) (PEO), , polybenzimidazole (PBI), , polyethylene (PE), , poly­(vinylidene fluoride) (PVDF), , polyacrylonitrile (PAN), etc. For the first time, Ling et al used PVA to produce MXene/polymer composites with excellent flexibility and electrical conductivity, exploring the potential use of MXenes in polymer-based multifunctional nanocomposites .…”

“…Xu et al demonstrated the fabrication of Ti 3 C 2 /chitosan films by a spin-coating method, and the as-synthesized membranes can be applied in solvent dehydration via pervaporation process . In addition to the hydrophilic polymers, a few hydrophobic polymers can also be used to synthesize MXene/polymer membranes by casting method, such as poly­(vinylidene fluoridetrifluoro-ethylene-chlorofluoroehylene), PVDF, polydimethylsiloxane (PDMS), , PBI, , and so on.…”

Aqueous-Phase Exfoliation and Functionalization of Boron Nitride Nanosheets Using Tannic Acid for Thermal Management Applications

“…The rapid development of modern electronic devices toward high integration, miniaturization, and high power density gives rise to increased heat generation, resulting in daunting challenges in terms of heat dissipation management. − Developing thermal management materials (TMMs) with satisfactory thermal conductivity is a feasible way to address the excessive heat issue and thus improve the performance, reliability, and lifetime of electronic devices. − Typically, two-dimensional (2D) nanomaterials, such as graphene, transition metal carbides/carbonitrides (MXenes), and boron nitride nanosheets (BNNSs), have attracted extensive attention because of their unique structures and extraordinary thermal conductivities (λ). − Among all 2D nanomaterials, graphene possesses the highest in-plane λ (5000 W m –1 K –1 ), excellent mechanical flexibility, and high aspect ratio. These features make it a promising candidate for the fabrication of TMMs .…”

Bioinspired Dielectric Film with Superior Mechanical Properties and Ultrahigh Electric Breakdown Strength Made from Aramid Nanofibers and Alumina Nanoplates

“…Polymers-based dielectrics are widely utilized in advanced electronics and electric power systems by virtue of their irreplaceable advantages, such as easy processing, light weight, and excellent mechanical properties [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 ]. The rapid development of those modern devices with high power density, high integration, and high voltage has caused escalating hot-spot temperatures, causing a great challenge to the heat resistance of polymer dielectrics present in applications including high-frequency motors, high-voltage transformers, electric vehicles, 5G equipment, and pulsed power apparatuses, etc.…”