Multifunctional Biocomposites Based on Polyhydroxyalkanoate
and Graphene/Carbon Nanofiber Hybrids for Electrical and Thermal Applications
Posted on 2020-07-20 - 09:15
Biobased
and/or biodegradable plastics have been proposed as a
sustainable alternative to long-lasting and fossil fuel-derived ones.
Among those available, polyhydroxyalkanoate (PHA) shows great potential
across a large variety of applications, but it is not used extensively
because of its relatively poor physical properties. An expansion of
its uses can be accomplished by developing nanocomposites where PHAs
are utilized as the polymer matrix. Herein, a PHA biopolyester was
melt-blended with graphene nanoplatelets (GNPs) or with a hybrid mixture
of GNPs and carbon nanofibers. The resulting nanocomposites exhibited
enhanced thermal stability and satisfactory mechanical properties.
The hybrid nanocomposites percolated electrically at lower nanofiller
loadings compared to the GNP–PHA system. The electrical conductivity
at 15 wt % loading was ∼6 times higher than that of the GNP-based
nanocomposite. As a result, the electromagnetic interference shielding
performance of the hybrid material was around 50% better than the
pure GNP-reinforced nanocomposites. The thermal conductivity increased
significantly for both types of bionanocomposites and reached values
in the order of 5 W K–1 m–1, with
the hybrid-based material displaying once again the best performance.
Considering the solvent-free and industrially compatible production
method utilized to manufacture these nanocomposites, the proposed
multifunctional materials can expand the range of applications of
PHAs and increase the environmental sustainability of the plastic
and plastic electronics industry.
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Cataldi, Pietro; Steiner, Pietro; Raine, Thomas; Lin, Kailing; Kocabas, Coskun; Young, Robert J.; et al. (2020). Multifunctional Biocomposites Based on Polyhydroxyalkanoate
and Graphene/Carbon Nanofiber Hybrids for Electrical and Thermal Applications. ACS Publications. Collection. https://doi.org/10.1021/acsapm.0c00539
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AUTHORS (9)
PC
Pietro Cataldi
PS
Pietro Steiner
TR
Thomas Raine
KL
Kailing Lin
CK
Coskun Kocabas
RY
Robert J. Young
MB
Mark Bissett
IK
Ian A. Kinloch
DP
Dimitrios G. Papageorgiou
KEYWORDS
production methodPHA biopolyesternanofiller loadingsgraphene nanoplateletshybrid-based materialThermal Applications Biobasedmultifunctional materialsnanocomposites percolatedfuel-derived onescarbon nanofiberspolymer matrixGNP-based nanocompositeMultifunctional Biocompositesplastic electronics industryGNP-reinforced nanocompositeselectromagnetic interference shield...