Flexible and strong Fe3O4/cellulose composite film as magnetic and UV sensor

Uniformly aligned flexible magnetic films from bacterial nanocelluloses for fast actuating optical materials

“…c UV-vis spectra of the bCNC films with different magnetic nanoparticle loadings and transmittance data at 550 nm. d Comparison in the transmittances at550 and 800 nm for magnetic films in this study and reported elsewhere[66][67][68][69][70][71] . Insets show the visibility of patterns under all magnetic films.…”

Magnetic cellulose: does extending cellulose versatility with magnetic functionality facilitate its use in devices?

“…Discussions in regard of particles formed separately and then combined with cellulose assign the interaction between cellulose and the nanoparticles to a coordinate bond between Fe 3 O 4 and hydroxyl group of cellulose. 67 The improvement in thermal stability has been considered as evidence of the interaction between hydroxyl groups and magnetic particles. 48 The co-precipitation of iron oxide particles leads to strong interaction as demonstrated by the fact that the nanoparticles remained attached even under intense sonication.…”

“…66 Hydrothermal methods for preparing cellulose composite films with Fe 3 O 4 have been established using FeCl 3 , trisodium citrate dihydrate, and sodium acetate trihydrate dissolved in ethylene glycol and autoclaved at 200 1C, thereby leading to spherical particles of diameter 243 AE 72 nm. 67 CNC-Fe 3 O 4 hybrids were prepared via hydrothermal decomposition of iron(III) acetylacetonate. This was added to a mixture of oleic acid, 1-octadecene, and benzyl ether and heated to form Fe 3 O 4 nanoparticles.…”

“…The shielding effect can be quantified by measuring current in the film applied with and without an external magnetic field in a setup where the magnetic field-generating films are placed on a magnet. 67,109 In addition, the alignment of the magnetic domains in such films allowed a specific response depending on the alignment in the film and of the magnetic field. Along the direction parallel to the magnetic orientation, the current instantly decreased from 7.4 nA to 5.1 nA when an additional magnetic field was introduced.…”

Self-assembly in biobased nanocomposites for multifunctionality and improved performance

“…However, one work by Yang et al reported Fe 3 O 4 cluster formation via blending in cellulose matrices. 199 Cluster size was stabilized in the matrix due to strong bonding with cellulose hydroxyl groups. The introduction of Fe 3 O 4 clusters was shown to reduce the movement of cellulose chains in the composite, hindering crystallization processes and reducing tensile strength.…”