title: Magnetic bionanocomposites from cellulose nanofibers: Fast, simple and effective production method.
abstract: Nanocellulose is becoming a topic of great interest due to its lightweight, huge availability and its interesting properties. Among these properties, it is worthy to distinguish its specific surface and its strength. Both properties allow producing films with great mechanical properties able to retain nanoparticles which can provide the nanopaper of much functionality. Many applications for nanocellulose nanocomposites have been reported, demonstrating the interesting opportunities that this product has in a near future. In this sense, the present work attempts to produce membranes based on cellulose nanofibers (CNF) filled with magnetite nanoparticles with the purpose of developing membranes for loudspeakers. The main advantage of this is the avoiding of the iron core that one can find in any loudspeaker, since the membrane itself acts as that core. Bionanocomposites ranging from 10 to 70% of magnetite nanoparticles were produced by filtration in a nitrocellulose membrane with a pore size of 0,22μm. Tensile tests showed that mechanical properties were decreased as the amount of magnetite was increased. They were observed by FE-SEM to see the interactions between nanoparticles and CNF. Finally, a loudspeaker prototype was developed in order to evaluate the sonorous efficiency of the resulting membranes.
authors.affiliation: LEPAMAP Research Group, University of Girona, Maria Aurèlia Capmany, 61, Girona 17003, Spain.
authors.forename: Quim
authors.initials: Q
authors.lastname: Tarrés
authors.affiliation: GREFEMA Research Group, University of Girona, Maria Aurèlia Capmany, 61, Girona 17003, Spain.
authors.forename: Alexandre
authors.initials: A
authors.lastname: Deltell
authors.affiliation: PRODIS Research Group, University of Girona, Maria Aurèlia Capmany, 61, Girona 17003, Spain.
authors.forename: F Xavier
authors.initials: FX
authors.lastname: Espinach
authors.affiliation: LEPAMAP Research Group, University of Girona, Maria Aurèlia Capmany, 61, Girona 17003, Spain.
authors.forename: M Àngels
authors.initials: MÀ
authors.lastname: Pèlach
authors.affiliation: LEPAMAP Research Group, University of Girona, Maria Aurèlia Capmany, 61, Girona 17003, Spain. Electronic address: m.delgado@udg.edu.
authors.forename: Marc
authors.initials: M
authors.lastname: Delgado-Aguilar
authors.affiliation: LEPAMAP Research Group, University of Girona, Maria Aurèlia Capmany, 61, Girona 17003, Spain.
authors.forename: Pere
authors.initials: P
authors.lastname: Mutjé
mesh_terms: D002482:Cellulose / Q000737:chemistry*; D058185:Magnetite Nanoparticles / Q000737:chemistry*; D008567:Membranes, Artificial; D053761:Nanocomposites / Q000737:chemistry*; D057139:Nanofibers / Q000737:chemistry*; D036103:Nanotechnology / Q000379:methods*; D013718:Tensile Strength; D013997:Time Factors
chemical_list: D058185:Magnetite Nanoparticles; D008567:Membranes, Artificial; D002482:Cellulose
keywords: Bionanocomposite; Cellulose nanofibers; Magnetite