Single nozzle electrospinning of encapsulated epoxy and mercaptan in PAN for self-healing application

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 mercap...

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Bibliographic Details
Published in:Polymer (Guilford) 2020-01, Vol.186, p.122007, Article 122007
Main Authors: Mirmohammad Sadeghi, Sayed Ali, Borhani, Sedigheh, Zadhoush, Ali, Dinari, Mohammad
Format: Article
Language:English
Subjects:
Chemical reactions
Electron microscopy
Electrospinning
Encapsulation
Epoxy resins
Fourier analysis
Fourier transforms
Infrared analysis
Infrared spectroscopy
Nanofibers
Nozzles
Organic chemistry
Phase separation
Polyacrylonitrile
Polymer matrix composites
Room temperature
Self healing materials
Single nozzle electrospinning
Solidification
Solubility parameter
Solubility parameters
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Summary: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. [Display omitted] •Hybrid core shell nanofibers was produced by single nozzle electrospinning.•Phase separation plays a major role in the formation mechanism of core-shell nanofibers.•Solubility parameter was calculated to study the immiscibility of PAN-epoxy and PAN-PETMP.
ISSN:0032-3861
1873-2291
DOI:10.1016/j.polymer.2019.122007