Lightweight and Flexible Graphene Foam Composites for High‐Performance Electromagnetic Interference Shielding

Chen, Zongping; Xu, Chuan; Ma, Chaoqun; Ren, Wencai; Cheng, Hui‐Ming

doi:10.1002/adma.201204196

Cited by 1,800 publications

(1,197 citation statements)

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“…It has been shown that adding graphene to polymers can enhance the mechanical, electrical, and thermal properties of the resulting nanocomposites678910. Graphenebased polymer composites with high electrical and thermal conductivity are highly desirable in many practical applications such as electronic device, electromagnetic shielding, and thermal management1011121314.…”

mentioning

confidence: 99%

“…Since the electrical and thermal conductivity of these composites strongly rely on electron and phonon percolation between the separated filler particles141516, a good dispersion of graphene sheets and high filler content are required to form a conductive interconnected network in the insulating polymer matrix to improve the conductivity of the composites17.…”

mentioning

confidence: 99%

“…Despite the improved homogeneous distribution, however, the electrical conductivity of these composites is still far below the expected level, due to high intersheet junction contact resistance amongst graphene sheets, arising from the functional groups between graphene sheets and the polymer matrix16. Furthermore, a high loading of fillers generally hampers the process ability and overall properties of the composites due to severe agglomeration and poor interfacial bonding1418.…”

mentioning

confidence: 99%

“…, have developed a selfassembly and hot press technique for fabricating polystyrene composites with 3D interconnected graphene networks16. Chen et al reported a highly conductive polydimethyl siloxane composite films with 3D graphene foam using a templatedirected chemical vapor deposition method14. The compact contact between graphene sheets in the 3D architecture and high reduction level of graphene sheets render remarkable electrical conductivity to the composites.…”

mentioning

confidence: 99%

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Highly Electrically Conductive Nanocomposites Based on PolymerInfused Graphene Sponges

Samad

Polychronopoulou

et al. 2014

Sci Rep

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Conductive polymer composites require a threedimensional 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 vacuumassisted 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 GSepoxy composites prepared display consistent isotropic electrical conductivity around 1Sm, and it is found to be close to that of the pristine GS. Compared with neat epoxy, GSepoxy has a 12ordersofmagnitude 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.

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