Development of Porous Polyacrylonitrile Composite Fibers: New Precursor Fibers with High Thermal Stability

Polyacrylonitrile (PAN) fibers with unique properties are becoming increasingly important as precursors for the fabrication of carbon fibers. Here, we suggest the preparation of porous PAN composite fibers to increase the homogeneity and thermal stability of the fibers. Based on the thermodynamics o...

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Bibliographic Details
Published in:Electronic materials (Basel) 2021-12, Vol.2 (4), p.454-465
Main Authors: Samimi-Sohrforozani, Ehsan, Azimi, Sara, Abolhasani, Alireza, Malekian, Samira, Arbab, Shahram, Zendehdel, Mahmoud, Abolhasani, Mohammad Mahdi, Yaghoobi Nia, Narges
Format: Article
Language:English
Subjects:
Carbon fibers
Fourier transforms
Graphene
high crystallinity
Morphology
phase diagram
polyacrylonitrile composite fiber
Polymers
porous fibers
Solvents
Spectrum analysis
thermal stability
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Summary:Polyacrylonitrile (PAN) fibers with unique properties are becoming increasingly important as precursors for the fabrication of carbon fibers. Here, we suggest the preparation of porous PAN composite fibers to increase the homogeneity and thermal stability of the fibers. Based on the thermodynamics of polymer solutions, the ternary phase diagram of the PAN/H2O/Dimethylformamide (DMF) system has been modeled to introduce porosity in the fibers. Adding a conscious amount of water (4.1 wt.%) as a non-solvent to the PAN solution containing 1 wt.% of graphene oxide (GO), followed by wet spinning, has led to the preparation of porous composite fibers with high thermal stability and unique physicochemical properties. Differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) results elucidate that PAN/GO/H2O porous composite fibers have a higher thermal decomposition temperature, increased residual weight, reduced heat release rate, and higher crystallinity in comparison with the pristine PAN fibers, being a promising precursor for the development of high-performance carbon fibers. The results show a promising application window of the synthesized PAN fibers in electronic and electrochemical devices.
ISSN:2673-3978
2673-3978
DOI:10.3390/electronicmat2040031