Investigation of the Electro-Mechanical Behavior of Hybrid Polyaniline/Graphene Nanocomposites Fabricated by Dynamic Interfacial Inverse Emulsion Polymerization - Graphene

Graphene > Vol.4 No.1, January 2015

Volume 4, Issue 1 (January 2015)

ISSN Print: 2169-3439 ISSN Online: 2169-3471

Google-based Impact Factor: 0.25 Citations

Investigation of the Electro-Mechanical Behavior of Hybrid Polyaniline/Graphene Nanocomposites Fabricated by Dynamic Interfacial Inverse Emulsion Polymerization ()

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DOI: 10.4236/graphene.2015.41002 4,137 Downloads 5,018 Views Citations

Author(s)

Rami Regueira^1,2, Ran Yosef Suckeveriene^2,3, Irena Brook^1,2, Guy Mechrez², Roza Tchoudakov², Moshe Narkis^2*

Affiliation(s)

¹Interdepartmental Program in Polymer Engineering, Technion-IIT, Haifa, Israel.
²Department of Chemical Engineering, Technion-IIT, Haifa, Israel.
³Department of Water Industries Engineering, Kinneret College in the Jordan Valley, Zemach, Israel.

ABSTRACT

This paper describes a study on electrical resistivity under loading of polyaniline (PANI)/graphene nanocomposite powders and compacts. The composites were prepared by an in-situ interfacial dynamic inverse emulsion polymerization technique under sonication of aniline in the presence of graphene sheets in chloroform. During polymerization the graphene nanoplatelets are coated with PANI and are well dispersed both in the polymeric suspension and then in the dried polymer matrix as evidenced by cryogenic transmission electron microscopy (Cryo-TEM) and high resolution scanning microscopy (HRSEM). The presence of graphene nanoplatelets lowers the electrical resistivity of the polyaniline by two orders of magnitude for both the powder and the compact composites as demonstrated by their electrical resistance measurements conducted under loading. The lowest measured electrical resistivity values were 5 Ω·cm for 33% wt. graphene powder and 8 Ω·cm for 41% wt. graphene compacted composites. Cyclic electrical measurements under loading showed a distinct reproducible dependence of the bulk resistivity vs. applied pressure. This repetition is a key component for electro-mechanical sensors. To the authors’ best knowledge, this is the first report on polymerization of aniline in presence of graphene by the in-situ interfacial dynamic inverse emulsion polymerization technique and also the first report on cyclic electrical measurements under pressure of PANI/graphene nanocomposites.

KEYWORDS

Nanocomposites, Polyaniline, Graphene, Electro-Mechanical Sensors, Inverse Emulsion

Share and Cite:

Regueira, R. , Suckeveriene, R. , Brook, I. , Mechrez, G. , Tchoudakov, R. and Narkis, M. (2015) Investigation of the Electro-Mechanical Behavior of Hybrid Polyaniline/Graphene Nanocomposites Fabricated by Dynamic Interfacial Inverse Emulsion Polymerization. Graphene, 4, 7-19. doi: 10.4236/graphene.2015.41002.

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