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http://dx.doi.org/10.7317/pk.2015.39.2.293

Preparation, Morphology and Electrical Conductivity of Polystyrene/Polydopamine- Carbon Nanotube Microcellular Foams via High Internal Phase Emulsion Polymerization  

Kim, Haseung (Department of Polymer Engineering, The University of Suwon)
Na, Hyo Yeol (Department of Polymer Engineering, The University of Suwon)
Lee, Jong Heon (Sonix System, Co., Ltd., Business Incubation Center, The University of Suwon)
Lee, Seong Jae (Department of Polymer Engineering, The University of Suwon)
Publication Information
Polymer(Korea) / v.39, no.2, 2015 , pp. 293-299 More about this Journal
Abstract
Conductive microcellular foams consisted of polystrene (PS) and polydopamine-coated carbon nanotube (PDA-CNT) were prepared via high internal phase emulsion (HIPE) polymerization and their morphology and electrical conductivity were investigated. CNT as a conductive nanofiller was modified to PDA-CNT by coating with hydrophilic PDA on the surface of CNT to increase aqueous phase dispersion and emulsion stability. It was possible to prepare the HIPEs having higher PDA-CNT content and the resultant foams having improved conductivity due to its good dispersion. The foams showed the morphology of interconnected cell structure. As PDA-CNT content increased, yield stress and storage modulus increased and cell size reduced. The PDA-CNT content showing electrical percolation threshold was ca. 0.58 wt% and the conductivity at PDA-CNT content of 5 wt% was increased to $10^{-3}S/m$.
Keywords
microcellular foam; high internal phase emulsion; electrical conductivity; carbon nanotube; polydopamine;
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