Abstract:
Epoxy materials are widely used for efficient bonding and repair of composite materials. Plasmonic nanoparticles can be employed as heat source to improve curing of epoxy films. We theoretically show how the nanoparticle-assisted photothermal curing is a four-stage process: a rapid plasmonic temperature increase, a slow curing initialization, a temperature increase due to cured epoxy direct light absorption and a final stage that completes the chemical transformation. Experiments confirm theoretical predictions and further demonstrate how the plasmon-assisted curing forms stronger bonds than conventional thermal curing.
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