Synthesis and Alignment of Iron Oxide Nanoparticles in a Regenerated Cellulose Film

Abstract

Summary: A polymer‐iron oxide nanocomposite film has been successfully synthesized by using a microporous regenerated cellulose film as template and aqueous ferrous chloride as precursor. The nanocomposite film was investigated with XRD, XPS, SEM, TEM, and VSM. The nanoparticles synthesized in situ were disk‐shaped with a mean diameter of ≈24 and thicknesses of 2.5–3.5 nm. For the first time, the nanodisks were well aligned in the cellulose matrix to form an ordered multibilayer structure by the shrinkage of the hybrid film while drying. The nanocomposite film displayed anisotropic magnetic properties as a result of the alignment of magnetic nanodisks. This work provides a novel and facile method for template synthesis of nanoparticles and aligned nanocomposites.TEM image of the air‐dried nanocomposite film; slice perpendicular to the film plane.magnified imageTEM image of the air‐dried nanocomposite film; slice perpendicular to the film plane.

Cellulose scaffolds modulated synthesis of Co3O4 nanocrystals: preparation, characterization and properties

“…The regenerated cellulose films prepared from NaOH/ urea aqueous solution displayed homogeneous microporous structure in the inner section, and the mean pore size and porosity was about 220 nm and 87 vol.%, respectively (Liu et al 2006). When the cellulose films were immersed into CoCl 2 solution, Co 2?…”

“…In our previous works, we presented a novel method for the synthesis of inorganic nanoparticles in the porous structured regenerated cellulose materials (Liu et al 2006(Liu et al , 2008. The cellulose film was prepared by dissolving of native cellulose in NaOH/urea solution precooled to -12°C and subsequent regeneration.…”

Magnetic Responsive Cellulose Nanocomposites and Their Applications

“…The fibrous network structure, apart from providing high mechanical strength, offers macro/mesoporous spaces which can be used as reaction chambers for precipitation of nanoparticles with the fibers providing a support structure to hold the particles. (Liu et al, 2006(Liu et al, , 2011a(Liu et al, , 2012a. In this method, cellulose films are immersed into FeCl2 or FeCl3 solution firstly and metal ions can be readily impregnated into the cellulose films through the pores.…”

Preparation and properties of hybrid monodispersed magnetic α-Fe2O3 based chitosan nanocomposite film for industrial and biomedical applications

“…The preparations of magnetic CH microspheres were mostly prepared by two steps using suspension cross-linking technique: (1) choosing the right materials for synthesis of iron oxide nanoparticles is crucial because by varying the processing conditions various forms of iron oxides namely Fe 3 O 4 , ␥-Fe 2 O 3 and ␣-Fe 2 O 3 can be synthesized and (2) binding of nanoparticles into favorable biomolecules which are served as templates. Highly aligned nanoparticles of magnetite have been synthesized by employing trypsin as a template [37]. CH has served as a template for the in situ synthesis of magnetite nanoparticles and as coating for ␥-Fe 2 O 3 [38].…”