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A Novel Graphene Foam for Low and High Strains and Pressure SensingApplications

Published online by Cambridge University Press:  13 January 2016

Yarjan Abdul Samad ,
Yuanqing Li  and
Kin liao
Yarjan Abdul Samad*
Affiliation:
Mechanical Engineering Department of Khalifa University of Sci. Tech. & Res. Abu Dhabi 127788, UAE
Yuanqing Li
Affiliation:
Mechanical Engineering Department of Khalifa University of Sci. Tech. & Res. Abu Dhabi 127788, UAE
Kin liao
Affiliation:
Mechanical Engineering Department of Khalifa University of Sci. Tech. & Res. Abu Dhabi 127788, UAE
*
*(Email: [email protected])
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Abstract

We are reporting the formation of free-standing graphene foam (GF) via a noveltwo-step process, in which a polyurethane (PU) foam is first dip-coated withgraphene oxide (GO) and subsequently the dried GO-coated-PU is heated innitrogen atmosphere at 1000°C. During the pyrolysis of theGO-coated-PU, GO is reduced to GF whereas PU is simultaneously decomposed andreleased completely as volatiles in a step wise mass-loss mechanism. Morphologyof the formed GF conforms to that of the pure PU foam as indicated by thescanning electronic micrographs. Polydimethylsiloxane (PDMS) was successfullyinfiltrated inside the GF to form flexible and stretch-able conductors. TheGF-PDMS composite was tested for it’s pressure and strain sensingcapabilities. It is shown that a 30% compressive strain changes resistance ofthe GF-PDMS composite to about 800% of it’s original value. Sincedensity of the formed GF is tunable, therefore, the pressure/strain sensivity ofthe GF-PDMS composite is also tunable.

Keywords

foamsensorcoating
Type
Articles
Information
MRS Advances , Volume 1 , Issue 1: Biomaterials and Soft Materials , 2016 , pp. 27 - 32
Copyright
Copyright © Materials Research Society 2016 

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References

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