Electrospinning and post-drawn processing effects on the molecular organization and mechanical properties of polyacrylonitrile (PAN) nanofibers
| Autor: | Vince Beachley, David A. Brennan, Cailyn D. Rhoads, Samuel E. Lofland, Khosro A. Shirvani |
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| Rok vydání: | 2019 |
| Předmět: |
chemistry.chemical_classification
Fabrication Materials science Polyacrylonitrile Modulus 02 engineering and technology Polymer Crystal structure 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Electrospinning 0104 chemical sciences chemistry.chemical_compound chemistry Nanofiber Ultimate tensile strength General Materials Science Composite material 0210 nano-technology |
| Zdroj: | MRS Communications. 9:764-772 |
| ISSN: | 2159-6867 2159-6859 |
| Popis: | This paper reports the molecular organization and mechanical properties of electrospun, post-drawn polyacrylonitrile (PAN) nanofibers. Without post-drawing, the polymer chain was kinked and oriented in hexagonal crystalline structures. Immediate post-drawing in the semi-solid state disrupted the crystal structures and chain kink at maximum draw ratio. Structural re-orientation at maximum draw resulted in a 500% increase in Young’s modulus and a 100% increase in ultimate tensile strength. By applying post-drawing to electrospinning it may be possible to obtain PAN fibers and PAN-derived carbon fibers with enhanced mechanical properties compared to available fabrication technologies. |
| Databáze: | OpenAIRE |
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