Abstract
In this research, two types of core-shell nanofibers, epoxy-polyacrylonitrile (PAN) and mercaptan-PAN were successfully fabricated using single nozzle electrospinning. Fourier transform infrared spectroscopy (FTIR) analysis showed absence of chemical reaction between the encapsulated epoxy or mercaptan and PAN. Moreover, transmittance electron microscopy (TEM) images proved that the encapsulated epoxy and mercaptan were uniformly distributed within core of the nanofibers. Hybrid core-shell nanofibers mat was produced through twin electrospinning of epoxy-PAN and mercaptan-PAN on the same collector. Solidification of released core materials leads to repair a damaged area which could be used in epoxy composites for self-healing application. Degree of curing of epoxy resin was obtained to be 0.7 at 10 °C, proving that the dual component healing agent, epoxy and mercaptan is a suitable self-healing system in sub-room temperature. This research shows that solubility parameter of the materials plays a major role in the formation mechanism of core-shell nanofibers.
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