Journal
IEEE TRANSACTIONS ON NANOTECHNOLOGY
Volume 15, Issue 4, Pages 687-695Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TNANO.2016.2573438
Keywords
Nanomaterials; multilayer graphene flakes; polydimethyl-siloxane; sheet resistance; electromechanical measurement; stretchable conductors; wearable electronics
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Multilayer graphene (MLG)/polydimethylsiloxane (PDMS) composite foils are developed for possible application in wearable electronics as stretchable conductors or in strain sensing. The MLG/PDMS foils are prepared through infiltration of PDMS into porous freestanding MLG papers. The freestanding MLG papers are first produced through vacuum filtration of MLG-flake suspensions and are characterized by sheet resistance in the range from similar to 0.7 to similar to 1.1 Omega/square and average thickness in the range from similar to 75 to similar to 110 mu m. The electromechanical characteristic of the produced MLG/PDMS foils is assessed experimentally by measuring the dc electrical resistance of the produced specimen during tensile strength tests. It results that the breaking load of the new composite foils, occurring after an elongation of similar to 11 mm, which corresponds to a deformation of similar to 80%, is nearly doubled with respect to the one of neat PDMS. Moreover, for an elongation up to 2 mm the total dc resistance of the foil exhibits an increase lower than the 20% of its original value.
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