Investigation of improved dielectric and thermal properties of ternary nanocomposite PMMA/MXene/ZnO fabricated by in‐situ bulk polymerization

Abstract

Electric power system applications demand for high‐temperature dielectric materials. The improved performance of polymer nanocomposites requires improvement in their thermal conductivity & stability, dielectric stability and processing technique. However, they often lose their dielectric properties with a rise in temperature. Here, we offer a solution by incorporating electrically conducting material (MXene) and semiconducting inorganic nanoparticles (ZnO NPs) into an insulating PMMA polymer matrix to maintain high dielectric constant, both at the room and high temperature. Therefore, to achieve desirable thermal and dielectric properties is the main objective of the present study based on the homogeneous distribution of the nanofillers by in‐situ bulk polymerization assisted by strong sonication in the corresponding polymer. The introduction of MXene and ZnO NPs into the PMMA not only acquires a substantial increment in the dielectric constant, to attain a value 437, with minimum energy loss of 0.36 at 25 Hz, but also improves the thermal conductivity of PMMA up to 14 times by causing the reduction of thermal resistance, which is actually responsible for the poor thermal conductivity of amorphous pure PMMA polymer. More importantly, hybrid PMMA/4:2 wt% MXene:ZnO nanocomposite leads to an excellent thermal stability. Moreover, further characterization of the synthesized nanocomposites by FTIR, SEM and XRD leads to the evaluation of strong interaction of ternary components with PMMA matrix.

Photonic hook formation in near-infrared with MXene Ti3C2 nanoparticles

“…Consequently, we focus on comparison between MXenes and gold nanoparticles under CW illumination. Furthermore, we assume that the incident intensity is very low, meaning that we can neglect the dependence of the dielectric function of MXenes on temperature, 52,53 which is directly related to photon absorption in near-infrared.…”

MXenes: An emergent materials for packaging platforms and looking beyond

“…Owing to the strong interaction among the ternary components, the composite possesses a dielectric constant of 437 with a minimum energy loss of 0.36 at 25 Hz, as well as an increased thermal conductivity up to 14 times compared with pristine PMMA. [ 131 ] Epoxy has also been employed to prepare nanocomposites with MXenes, even constructing 3D foam through sol‐gel and vacuum‐assisted impregnation processes. [ 132 ]…”

“…Reproduced with permission. [ 131 ] Copyright 2017, Wiley. B, the impact factor of thickness; (C) the impact factor of density; (D) absolute shielding effectiveness (SSE/t) as a function of thickness.…”

Preparation of highly reflective silver metallized PVC film by autocatalytic deposition

“…These applications collect energy by concentrating beams of light. Compared with inorganic substrates of glass, ceramics, and natural metals, polymer substrate film materials have obvious advantages in terms of quality, flexibility, cost, and processability 10,11 . However, most of the polymer films were nonconductive and nonreflective, which could not meet the requirements of high reflectivity, so a metal coating was necessary to achieve higher reflectivity on the surface 12 …”