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Strong transparent magnetic nanopaper prepared by immobilization of Fe3O4 nanoparticles in a nanofibrillated cellulose network

Nanofibrillated cellulose (NFC) is highly regarded as a popular new material due to its impressive mechanical properties, great potential for functionalization, easy accessibility, and environmental sustainability as precursors. The immobilization of nanoparticles in an NFC network is an effective way to fabricate transparent functionalized nanopaper. In this work, a uniform, flexible, magnetic nanopaper is prepared by the immobilization of Fe3O4 nanoparticles in an NFC network in an aqueous medium. The resulting transparent magnetic nanopaper (TMNP) possesses excellent transparency and magnetic properties combined with outstanding mechanical performance and flexibility. The combination of these characteristics makes TMNP an excellent candidate for magneto-optical applications.