Nacre-inspired Polymer Nanocomposites with High-performance and Multifunctional Properties Realized by a Facile Evaporation-induced Self-assembly Approach

Abstract

A bioinspired polymer-based nanocomposite consisting of hierarchically oriented 2D nanomaterials and polymers exhibits extraordinary properties in various applications. However, it is still a great challenge to break through the limitations of the fabrication process and polymer types for producing a laminated nanocomposite with no restrictions in dimension. Herein, large-area bulk polypropylene carbonate (PPC)/polytetrahydrofuran-functionalized reduced graphene oxide (PTHF-fRGO) nanocomposites with nacre-like layered structures are fabricated through a cost-effective and large-scale evaporation-induced self-assembly process, followed by thermal laminating. To enhance the interfacial compatibility and self-assembly efficiency, the 2D RGO are noncovalently functionalized via controlled termination of living PTHF. The comprehensive properties of the laminated composites, including thermal, mechanical, shape memory, and gas barrier properties, can be significantly improved by introducing highly oriented RGO (<5 wt %). Tuning the composition of oriented RGO (>5 wt %) and PPC matrix in the laminated nanocomposite yields a material with high thermal and electrical conductivities and electromagnetic interference (EMI) shielding properties. Thus, the resulting high-performance and multifunctional PPC-based materials with potential biodegradability are potential replacements for petroleum-based plastics in various applications.

Highly Thermally Conductive Graphene-Based Thermal Interface Materials with a Bilayer Structure for Central Processing Unit Cooling

“…The effectiveness of TC enhancement was assessed using the increased value of in-plane TC per unit filler (Figure d). The D-G/gelatin film displays an outstanding in-plane TC enhancement per unit filler (0.77 W m –1 K –1 wt % –1 ) compared with the previous reports. ,,,,− …”

“…(b) In-plane TC of D-G/gelatin composite films as a function of maltose-g-graphene in the conductive layer. (c) Comparison of in-plane TC between D-G/gelatin composite films with the previous reports. ,− (d) Comparison of TC enhancement per unit filler to verify the superiority of D-G/gelatin composite films. ,,,,− (e) Infrared thermal image and (f) surface temperature variation of the 40 wt % U-G/gelatin film and the 40 wt % D-G/gelatin film.…”

“…The anisotropic heat conduction is significant for thermal management of electronic devices with a localized heat source, such as the monolithic microwave integrated circuit, the large-scale integrated circuit, and the CPU Figure c summarizes the in-plane TC of our D-G/gelatin composite films and other polymer composite films with different fillers in the previous literature. ,− It is conspicuous that our composite films exhibit higher TC than many graphene-based composite films at a similar filler content. The effectiveness of TC enhancement was assessed using the increased value of in-plane TC per unit filler (Figure d).…”

A dual non-covalent bonding constructed continuous interfacial structure for reducing interfacial thermal resistance

“…(e) Comparison of thermal conductivity of composites in our work with that of other reported composites containing functionalized graphene. [31][32][33][34][35][36][37][38][39] (f) Proposed mechanism of E-G@C-P3HT for thermal conduction. and S16 †).…”

Grafting silica onto reduced graphene oxide via hydrosilylation for comprehensive rubber applications: Molecular simulation and experimental study

“…[7] Graphene (GE), another oil-independent filler, has been the subject of intense research due to its outstanding physical properties and large specific surface area, and especially its thermal conductivity. [8] According to the comprehensive properties of GE, the addition of GE can enhance the relevant properties of rubber composites. It has the potential to compensate for the shortcomings of the wear resistance and thermal conductivity of SiO 2 .…”