Tailor Made Conductivities of Polymer Matrix for Thermal Management: Design and Development of Three-Dimensional Carbonaceous Nanostructures

Abstract

The thermal conductivity of graphene is limited in the transverse direction due to the exfoliation of the interplanar distance. In this study, the multiwalled carbon nanotubes (MWCNTs) with high thermal conductivities were immobilized into the exfoliated few layers graphene with an objective to enhance the transverse thermal conductivity of MWCNT embedded graphene three-dimensional architectures. Reconstructing the topographically controlled synthetic hybrid nanostructure assemblies in a polymer matrix provides the opportunity to gain insight into the electrical and thermal conduction mechanism. The thickness of the resin layer between the nanohybrid fillers was found to be critical for the phonon transport through the coating whereas this epoxy insulating layer prevents tunneling of the electron. By controlled functionalization and site specific orientations of hybrid nanoscale morphologies in the fiber reinforced composite, the higher mechanical strength could be achieved with increased electrical but reduced thermal boundary resistance of the matrix.

Insights into enzymatic degradation of physically crosslinked hydrogels anchored by functionalized carbon nanofillers

“…23 To check the degree of immobilization of nanomaterials into the polymer matrix, the 1D and 2D nanomaterials were combined together to prepare 3D hierarchical structures of MWCNTs immobilized into few layer graphene flakes. 24 The different geometries of nanofillers and their analysis are described in the ESI† (Fig. S1).…”

Interfacial interactions and properties of cellular structured polyurethane nanocomposite based on carbonaceous nano‐fillers

“…The nano-fillers (MWCNT and edge functionalized graphene) were synthesized, modified and functionalized in the laboratory. 24,25 The fullerenol was taken from other team of our laboratory. The size of the fullerenol is 1-2 nm diameter, 26 cluster size 30-80 nm and the number of hydroxyl groups' equivalent per fullerene 27 is 42.…”

“…The size of acid functionalized MWCNT (outer diameter: 30-40 nm, length 3-4 μm and edge functionalized graphene (flake size 500-1000 nm, graphene layers: 10-15). 24,25 The schematic representation and corresponding SEM images of these nano-fillers are shown in Figure 1(a). TPU is a polymer with glass transition temperature of −40 C and softening point of 109 C. 28 The density of TPU is about 1.20 g/cm 3 .…”

“…In this case the size is large in comparison with hydroxyl functionalized graphene (2D) which are having flake size of 500-1000 nm with a thickness of 5 nm and the number of layers in each flake are 10-15. 24,25 Therefore, the very good adhesion was observed in 2D nanocomposites cellular structure and slightly lower 3D that is, the combination of 2D and 1D.…”

Effect of Particle Orientation and Porosity on Thermal Conductivity of Petroleum Pitch Polymer-Based Carbon Molded Body

“…The high level of integration results in various problems caused by the heat they discharge, including reduced performance, malfunctioning, and substrate deterioration. For this reason, various heat sink materials, including carbon, ceramic, and metallic materials, have been studied and used to solve the problem [1][2][3][4][5][6]. In particular, carbon-based materials possess excellent properties, such as low density, high thermal conductivity, and high processability [7].…”