Synthesis of Recyclable Magnetic Cellulose Nanofibers from Ionic Liquids for Practical Applications in Separation Science

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  • Horikoshi Satoshi
    Department of Materials and Life Sciences, Faculty of Science and Technology, Sophia University
  • Yamazaki Satoshi
    Department of Materials and Life Sciences, Faculty of Science and Technology, Sophia University
  • Arai Yuhei
    Department of Materials and Life Sciences, Faculty of Science and Technology, Sophia University
  • Sakemi Daisuke
    Department of Materials and Life Sciences, Faculty of Science and Technology, Sophia University
  • Yoshizawa-Fujita Masahiro
    Department of Materials and Life Sciences, Faculty of Science and Technology, Sophia University
  • Serpone Nick
    PhotoGreen Laboratory, Dipartimento di Chimica, Universita di Pavia

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<p>The present study focused on coupling cellulose nanofibers (alternative materials for plastics and metals) with a magnetic ionic liquid (synthesized by a microwave-assisted method) through mixing to yield magnetic cellulose nanofibers (MCNFs) that can be recycled by attracting them to a magnet. Accordingly, two types of ionic liquids were synthesized: (a) 1-butyl-3-methylimidazolium tetrachloroferrate(III) {[bmim] FeCl4} and (b) 1-glycidyl-3-methylimidazolium tetrachloroferrate {[glmi]FeCl4}, which were characterized by the fast atom bombardment mass spectrometry (FAB−MS) technique. Impregnation of the cellulose nanofibers with the {[bmim]FeCl4} ionic liquid caused the latter to be physically adsorbed onto the nanofibers to produce {MCNF@{[bmim]FeCl4}, whereas the corresponding {[glmi]FeCl4} ionic liquid was chemically bonded to the cellulose nanofibers to yield magnetic {MCNF@[glmi]FeCl4} nanofibers. Under the experimental conditions used, the corresponding magnetic moments were 0.222 A m2 kg-1 for {MCNF@ {[bmim]FeCl4} and 0.095 A m2 kg-1 for {MCNF@[glmi]FeCl4}.</p>

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