Highly electrically conductive nanocomposites based on polymer-infused graphene sponges.
Conductive polymer composites require a three-dimensional 3D network to impart electrical conductivity. A general method that is applicable to most polymers for achieving a desirable graphene 3D network is still a challenge. We have developed a facile technique to fabricate highly electrical conductive composite using vacuum-assisted infusion of epoxy into graphene sponge GS scaffold. Macroscopic GSs were synthesized from graphene oxide solution by a hydrothermal method combined with freeze drying. The GS/epoxy composites prepared display consistent isotropic electrical conductivity around 1 S/m, and it is found to be close to that of the pristine GS. Compared with neat epoxy, GS/epoxy has a 12-orders-of-magnitude increase in electrical conductivity, attributed to the compactly interconnected graphene network constructed in the polymer matrix. This method can be extended to other materials to fabricate highly conductive composites for practical applications such as electronic devices, sensors, actuators, and electromagnetic shielding.
Department of Aerospace Engineering, Khalifa University of Science, Technology, Research, Abu Dhabi 127788, UAE.
Yuanqing
Y
Li
Department of Aerospace Engineering, Khalifa University of Science, Technology, Research, Abu Dhabi 127788, UAE.
Yarjan Abdul
YA
Samad
Department of Mechanical Engineering, Khalifa University of Science, Technology, Research, Abu Dhabi 127788, UAE.
Kyriaki
K
Polychronopoulou
Department of Chemical Engineering, The Petroleum Institute, Abu Dhabi 2533, UAE.
Saeed M
SM
Alhassan
Department of Aerospace Engineering, Khalifa University of Science, Technology, Research, Abu Dhabi 127788, UAE.
Kin
K
Liao