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Lightweight high-density polyethylene/carbonaceous nanosheets microcellular foams with improved electrical conductivity and mechanical properties

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Abstract

The high-density polyethylene (HDPE) nanocomposites were prepared by using graphite nanosheets (GNS) and expanded graphite (EG), followed by foaming with subcritical CO2 used as an environmentally benign and nonflammable foaming agent. The partially exfoliated GNS and EG endow the prepared microcellular nanocomposite foams with high electrical conductivity, improved mechanical properties, as well as density reduction up to ca. 20 %. Interestingly, insulator-to-semiconductor transition of microcellular nanocomposite foams shifts to lower nanofiller content compared to that of bulk nanocomposites. Whether the nanofiller is GNS or EG, its incorporation leads to uniformly small cells, resulting in a remarkable enhancement in ductility without sacrificing toughness. It has demonstrated that foaming of HDPE nanocomposites with EG or GNS provides tough and lightweight microcellular foams, exhibiting the potential for use in conductive high-performance lightweight nanocomposite systems.

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Authors and Affiliations

  1. Department of Polymer Engineering and Color Technology, Amirkabir University of Technology, P.O. Box 15875-4413, Tehran, Iran

    Siamak Baseghi, Hamid Garmabi, Jaber Nasrollah Gavgani & Hossein Adelnia

  2. Department of Chemical Engineering, Amirkabir University of Technology, P.O. Box 15875-4413, Tehran, Iran

    Jaber Nasrollah Gavgani

Authors
  1. Siamak Baseghi
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  2. Hamid Garmabi
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  3. Jaber Nasrollah Gavgani
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  4. Hossein Adelnia
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Correspondence to Siamak Baseghi.

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Baseghi, S., Garmabi, H., Gavgani, J.N. et al. Lightweight high-density polyethylene/carbonaceous nanosheets microcellular foams with improved electrical conductivity and mechanical properties. J Mater Sci 50, 4994–5004 (2015). https://doi.org/10.1007/s10853-015-9048-3

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  • DOI: https://doi.org/10.1007/s10853-015-9048-3

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