Melt-Mixed 3D Hierarchical Graphene/Polypropylene Nanocomposites with Low Electrical Percolation Threshold
Artikel i vetenskaplig tidskrift, 2019

Graphene-based materials are a family of carbonaceous structures that can be produced using a variety of processes either from graphite or other precursors. These materials are typically a few layered sheets of graphene in the form of platelets and maintain some of the properties of pristine graphene (such as two-dimensional platelet shape, aspect ratio, and graphitic bonding). In this work we present melt mixed graphene-based polypropylene systems with significantly reduced percolation threshold. Traditionally melt-mixed systems suffer from poor dispersion that leads to high electrical percolation values. In contrast in our work, graphene was added into an isotactic polypropylene matrix, achieving an electrical percolation threshold of similar to 1 wt.%. This indicates that the filler dispersion process has been highly efficient, something that leads to the suppression of the beta phase that have a strong influence on the crystallization behavior and subsequent thermal and mechanical performance. The electrical percolation values obtained are comparable with reported solution mixed systems, despite the use of simple melt mixing protocols and the lack of any pre or post-treatment of the final compositions. The latter is of particular importance as the preparation method used in this work is industrially relevant and is readily scalable.

polypropylene

melt mixing

graphene

electrical conductivity

nanocomposites

electrical percolation

Författare

Thomas Gkourmpis

Borealis AB

Karolina Gaska

Chalmers, Industri- och materialvetenskap, Konstruktionsmaterial

Davide Tranchida

Borealis Polyolefine GmbH

Antonis Gitsas

Borealis Polyolefine GmbH

Christian Müller

Chalmers, Kemi och kemiteknik, Tillämpad kemi, Christian Müller Group

Aleksandar Matic

Chalmers, Fysik, Kondenserade materiens fysik

Roland Kádár

Chalmers, Industri- och materialvetenskap, Konstruktionsmaterial

NANOMATERIALS

2079-4991 (eISSN)

Vol. 9 12 1766

Styrkeområden

Nanovetenskap och nanoteknik (2010-2017)

Produktion

Energi

Materialvetenskap

Ämneskategorier

Polymerteknologi

Materialkemi

Annan materialteknik

DOI

10.3390/nano9121766

PubMed

31835842

Mer information

Senast uppdaterat

2020-02-03