Carbon nanotube mediated miscibility of polyhydroxyalkanoate blends and chemical imaging using deuterium-labelled poly(3-hydroxyoctanoate)

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dc.contributor.authorRussell, RAen_AU
dc.contributor.authorFoster, LJRen_AU
dc.contributor.authorHolden, PJen_AU
dc.date.accessioned2024-02-27T01:35:18Zen_AU
dc.date.available2024-02-27T01:35:18Zen_AU
dc.date.issued2018-08en_AU
dc.date.statistics2024-02-27en_AU
dc.description.abstractBiopolymers have potential as scaffolds supporting regrowth of damaged tissues, however their material properties may limit the range of applications. Blending polymers with different thermomechanical properties has been demonstrated to extend the range of possible applications for polyhydroxyalkanoate (PHA) polymers, while the addition of nanoparticles can be used to modulate miscibility which influences strength and flexibility of the blend. Here we report on the blending of Poly(3-hydroxybutyrate) and Poly(3-hydroxyoctanoate) which possess different thermomechanical properties, and the effect of single wall carbon nanotubes (SWCNT) on their miscibility, electrical conductivity and thermomechanical performance. The apparent perturbation of phase boundaries in nanocomposite films observed by Scanning Electron Microscopy (SEM) was complemented by chemical mapping of film cross sections containing a deuterium-labelled poly(3-hydroxyoctanoate) phase in the blend using Infrared Microspectroscopy (IRM), suggesting increased miscibility due to nanoparticle addition. The electrical percolation threshold in nanocomposite films was observed between 0.5 and 1 wt% SWCNT, where the surface resistivity was reduced by eight orders of magnitude compared to the insulating polymer blend. Addition of SWCNT did not impact significantly on mechanical properties of films containing up to 2.5 wt% SWCNT. A solvent cast bionanocomposite film containing optimally 1 wt% SWCNT yielded a material with improved electrical conductivity compared to the SWCNT-free blend and which supported growth of Olfactory Ensheathing Cells, providing a basis for developing biopolymer scaffolds capable of conducting electrical stimulation. Crown Copyright © 2018. Published by Elsevier Ltd.en_AU
dc.description.sponsorshipThe authors thank Dr Tamim Darwish, National Deuteration Facility, ANSTO for supply of octanoic acid-d15.en_AU
dc.identifier.citationRussell, R. A., Foster, L. J. R., & Holden, P. J. (2018). Carbon nanotube mediated miscibility of polyhydroxyalkanoate blends and chemical imaging using deuterium-labelled poly (3-hydroxyoctanoate). European Polymer Journal, 105, 150-157. doi:10.1016/j.eurpolymj.2018.05.031en_AU
dc.identifier.issn0014-3057en_AU
dc.identifier.journaltitleEuropean Polymer Journalen_AU
dc.identifier.pagination150-157en_AU
dc.identifier.urihttp://dx.doi.org/10.1016/j.eurpolymj.2018.05.031en_AU
dc.identifier.urihttps://apo.ansto.gov.au/handle/10238/15445en_AU
dc.identifier.volume105en_AU
dc.languageEnglishen_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectDeuterationen_AU
dc.subjectNanocompositesen_AU
dc.subjectSolubilityen_AU
dc.subjectOrganic polymersen_AU
dc.subjectCarbon nanotubesen_AU
dc.subjectMechanical propertiesen_AU
dc.subjectNanoparticlesen_AU
dc.subjectElectric conductivityen_AU
dc.subjectThin Filmsen_AU
dc.titleCarbon nanotube mediated miscibility of polyhydroxyalkanoate blends and chemical imaging using deuterium-labelled poly(3-hydroxyoctanoate)en_AU
dc.typeJournal Articleen_AU
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