Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Electrically conductive GNP/epoxy composites for out-of-autoclave
  thermoset curing through Joule heating   The development of scalable Out of Autoclave (OoA) in situ thermoset curing
methods are required to overcome important drawbacks related to the autoclave
based processing methods typically used in industry. The incorporation of
graphene, an electrothermal carbon nanomaterial with the ability to transform
electric energy into heat through Joule heating, emerges as a promising route
to replace the conventional processing methods. In this work the electrical
behaviour of both uncured and oven cured GNPs/epoxy composites with loadings of
up to 10 wt% were evaluated and electrical percolation thresholds were
established for both. Above the critical loading found for oven cured materials
(8.5 wt%) the electrically conducting networks of GNPs formed in the matrix
showed the ability to act as integrated nanoheaters when an electric current
was passed through them, successfully curing the composites by Joule heating.
Composites prepared by this OoA curing method (as an alternative to the
traditional oven based one) at 10 wt% loading of GNPs were also prepared and
compared to the oven cured ones. They showed more compact composite structures,
with less microvoids and a preferred orientation of the GNPs in the matrix
relative to the oven cured material at identical loading, as revealed by
electron microscopy and polarized Raman spectroscopy, respectively. This
microstructure and anisotropy induced by the electrically induced (i.e. OoA)
cure led to GNPs/epoxy composites with superior electrical and mechanical
properties (revealed by tensile testing). The well distributed GNP
nanoparticles acting as nanoheaters integrated in a thermosetting matrix, in
combination with excellent mechanical and electrical performances achieved for
the overall graphene/epoxy composites and the simplicity associated to the
method, should open the door to novel industrial applications.

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The categories of this paper are: nucl-th
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The categories of this paper are: dg-ga
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The categories of this paper are: quant-ph
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The categories of this paper are: comp-gas
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The categories of this paper are: q-alg
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The categories of this paper are: astro-ph
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The categories of this paper are: econ
2
The categories of this paper are: math
21
The categories of this paper are: adap-org
34
The categories of this paper are: chem-ph
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The categories of this paper are: mtrl-th
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The categories of this paper are: acc-phys
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The categories of this paper are: solv-int
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The categories of this paper are: supr-con
0
The categories of this paper are: hep-ph
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The categories of this paper are: cmp-lg