Photothermal triggering of self-healing processes applied to the reparation of bio-based polymer networks

Green laser irradiation successfully activated self-healing processes in epoxy-acid networks modified with low amounts of gold nanoparticles (NPs). A bio-based polymer matrix, obtained by crosslinking epoxidized soybean oil (ESO) with an aqueous citric acid (CA) solution, was self-healed through mol...

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Bibliographic Details
Published in:Materials research express 2016-04, Vol.3 (4), p.45003-045003
Main Authors: Altuna, F I, Antonacci, J, Arenas, G F, Pettarin, V, Hoppe, C E, Williams, R J J
Format: Article
Language:English
Subjects:
Activation
Biopolymers
Crosslinking
Gold
Nanoparticles
Networks
photothermal effect
polymeric nanocomposite
Polymerization
Self healing materials
self-healing
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Summary:Green laser irradiation successfully activated self-healing processes in epoxy-acid networks modified with low amounts of gold nanoparticles (NPs). A bio-based polymer matrix, obtained by crosslinking epoxidized soybean oil (ESO) with an aqueous citric acid (CA) solution, was self-healed through molecular rearrangements produced by transesterification reactions of β-hydroxyester groups generated in the polymerization reaction. The temperature increase required for the triggering of these thermally activated reactions was attained by green light irradiation of the damaged area. Compression force needed to assure a good contact between crack faces was achieved by volume dilatation generated by the same temperature rise. Gold NPs dispersed in the polymer efficiently generated heat in the presence of electromagnetic radiation under plasmon resonance, acting as nanometric heating sources and allowing remote activation of the self-healing in the crosslinked polymer.
ISSN:2053-1591
2053-1591
DOI:10.1088/2053-1591/3/4/045003