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

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.
Authors:
 [1] ; ; ; ; ;  [2] ;  [3] ;  [1] ;  [4]
  1. Department of Mechanical and Industrial Engineering, University of Illinois at Chicago, 842 W. Taylor St., Chicago, Illinois 60607-7022 (United States)
  2. School of Mechanical Engineering, Korea University, Seoul 136-713 (Korea, Republic of)
  3. Department of Chemistry, King Saud University, Riyadh 11451 (Saudi Arabia)
  4. (Korea, Republic of)
Publication Date:
OSTI Identifier:
22493108
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 118; Journal Issue: 24; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
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