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Journal of Thermal Analysis and Calorimetry

, Volume 138, Issue 3, pp 1997–2004 | Cite as

Porous carbon fibers prepared from cellulose

Characterization of microstructure and water sorption properties
  • Igor MaťkoEmail author
  • Ondrej Šauša
  • Katarína Čechová
  • Ivan Novák
  • Helena Švajdlenková
  • Dušan Berek
  • Michal Pecz
Article
  • 67 Downloads

Abstract

A series of porous carbon microfibers has been prepared by controlled carbonization of cellulose precursors. Their surface area determined by the BET method from argon absorption ranges from about 1 to almost 1500 m2 g−1. The pore sizes of fibers determined with help of positron annihilation lifetime spectroscopy are in the range below 1 nm. Dried samples of the resulting material were imbued with water in order to characterize their water sorption abilities. Amount of absorbed water was precisely determined by thermogravimetry. Carbon fibers filled with water were analyzed with differential scanning calorimetry and positron annihilation lifetime spectroscopy. It has been shown that water sorption abilities of fibers are not simply proportional to their surface area; there exists a significant impact of other factors.

Keywords

Porous carbon fibers Thermogravimetry DSC Positron annihilation lifetime spectroscopy 

Notes

Acknowledgements

The authors thank Dipl.-Ing. D. Kečkéšová for performing the XRD analysis. The work was partially supported by the Slovak Grant Agencies VEGA (Project 2/0127/17) and APVV (Project 16-0369).

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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2019

Authors and Affiliations

  1. 1.Institute of PhysicsSlovak Academy of SciencesBratislavaSlovakia
  2. 2.Polymer InstituteSlovak Academy of SciencesBratislavaSlovakia
  3. 3.Faculty of Mathematics, Physics and InformaticsComenius University in BratislavaBratislavaSlovakia

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