Polyacrylonitrile nanofibers with added zeolitic imidazolate frameworks (ZIF-7) to enhance mechanical and thermal stability

Journal Article · Mon Dec 28 00:00:00 EST 2015 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4938112· OSTI ID:22493108

Lee, Min Wook ^[1]; An, Seongpil; Song, Kyo Yong; Joshi, Bhavana N.; Jo, Hong Seok; Al-Deyab, Salem S. ^[2]

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1. Department of Mechanical and Industrial Engineering, University of Illinois at Chicago, 842 W. Taylor St., Chicago, Illinois 60607-7022 (United States)
2. Department of Chemistry, King Saud University, Riyadh 11451 (Saudi Arabia)

Zeolitic imidazolate framework 7/polyacrylonitrile (ZIF-7/PAN) nanofiber mat of high porosity and surface area can be used as a flexible fibrous filtration membrane that is subjected to various modes of mechanical loading resulting in stresses and strains. Therefore, the stress-strain relation of ZIF-7/PAN nanofiber mats in the elastic and plastic regimes of deformation is of significant importance for numerous practical applications, including hydrogen storage, carbon dioxide capture, and molecular sensing. Here, we demonstrated the fabrication of ZIF-7/PAN nanofiber mats via electrospinning and report their mechanical properties measured in tensile tests covering the elastic and plastic domains. The effect of the mat fabrication temperature on the mechanical properties is elucidated. We showed the superior mechanical strength and thermal stability of the compound ZIF-7/PAN nanofiber mats in comparison with that of pure PAN nanofiber mats. Material characterization including scanning electron microscope, energy-dispersive X-ray spectroscopy, tensile tests, differential scanning calorimetry, and Fourier transform infrared spectroscopy revealed the enhanced chemical bonds of the ZIF-7/PAN complex.

• OSTI ID: 22493108
• Journal Information: Journal of Applied Physics, Vol. 118, Issue 24; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
CALORIMETRY
CARBON DIOXIDE
CHEMICAL BONDS
FILTRATION
FOURIER TRANSFORM SPECTROMETERS
HYDROGEN STORAGE
MECHANICAL PROPERTIES
MEMBRANES
NANOFIBERS
NITRILES
POROSITY
SCANNING ELECTRON MICROSCOPY
STRAINS
STRESSES
SURFACE AREA
X-RAY SPECTROSCOPY
ZEOLITES