Remarkable Effects of an Electrodeposited Copper Skin on the Strength and the Electrical and Thermal Conductivities of Reduced Graphene Oxide-Printed Scaffolds

Abstract

Architected Cu/rGO (reduced graphene oxide) heterostructures are achieved by electrodepositing copper on filament printed rGO scaffolds. The Cu coating perfectly contours the printed rGO structure, but isolated Cu particles also permeate inside the filaments. Although the Cu deposition conveys certain mass augment, the 3D structures remain reasonably light (bulk density  0.42 g cm -3 ). The electrical conductivity (e) of the Cu/rGO structure (8 x 10 4 S•m -1 ) shows a notable increment compared to e of the rGO structure (4 x 10 2 S•m -1 ). The effect on the scaffold robustness is also notable with an increase of the compressive strength by nearly ten times (from 20 kPa of the rGO scaffold to 150 kPa of the Cu/rGO structure) and cyclability as well. The improved thermal conductivity of the Cu coated scaffolds (4 times higher), in addition the e and strength improvements, suggests that 3D Cu/rGO structures could be suitable assemblies for integration into thermal dissipation systems, particularly as thermal interface materials, for compact electronic devices.

Thermal conduction in three-dimensional printed porous samples by high resolution infrared thermography

“…The specimen section varies between 25 Â 25 and 40 Â 40 mm 2 , thus, similar to those used in TPS. Regarding additively manufactured 3D ceramic structures, to the best of the authors knowledge, there are no experimental works analysing their thermal conductivities, although comparative evaluations of the heat dissipation capability of different printed materials during cooling have recently been addressed [19][20][21][22].…”

Robust and conductive mesoporous reduced graphene oxide-silica hybrids achieved by printing and the sol gel route

“…weakness, air and flame exposure vulnerability, lack of porosity at different scales, etc) would entail making composites or hybrids by anchoring other species on the 3D graphene structure while maintaining the accessible porosity and cellular character [27][28][29]. In particular, our group has previously shown that via relatively simple methods, such as liquid infiltration with a preceramic polymer or via copper electrodeposition [30,31], it is possible to build complex composite and hybrid materials using printed GO scaffolds as templates/supports. Presently, we propose the infiltration of 3D printed reduced GO (rGO) structures with a well-known silica precursor, tetraethyl orthosilicate (TEOS) or alternatively, mixed with an Al2O3 precursor, and take advantage of the sol-gel route to build 3D silica/ silicoaluminate)/rGO hybrid materials that reproduce the 3D printed template.…”

Synthetic Multiscale Graphene Aerogel Polymer Composites with High‐Conductive Performances for Hyperthermia Equipment

“…[8][9][10] Undoubtedly, graphene is an ideal additive for improving electric heating properties to electrical conductive composites. [11][12][13] With the development of graphene science, [14][15][16][17] graphene aerogel has proved to be one of the most promising materials for preparing electrical conductive materials because of its structural continuity, [18][19][20] where intermolecular bonding originated from π-π interactions and van der Waals forces between the graphene nanosheets. [21] In addition, graphene aerogels not only have a higher linkage density of nanosheets but also maintain excellent physicochemical properties of the 2D scale of graphene, which makes them more suitable to prepare functional composites.…”