Comparative study of ferromagnetic behaviour in bare and PMMA modified manganese ferrite (MnFe2O4) nanoparticles

Application of the Zn0.5Mn0.5Fe2O4–PMMA nanocomposite for efficient removal of complex organic pollutants

“…26 Modifying the surface of Zn-MnFe 2 O 4 NCPs with certain polymers can improve their magnetic, structural morphological, and electrical properties and further facilitate the retrieving process of the adsorbents. 27 In addition, Zn-MnFe 2 O 4 is prone to oxidation of the particles; therefore, surface modification of magnetic NCPs with a specific ligand would be necessary. Various attempts have been made to enhance the basic properties of these ferrites by adding or substituting different cations with varying valence states based on their intended applications.…”

Synthesis, structural characterization and effect of surface modification on magnetization of hybrid manganese ferrite nanoparticle

“…In case of oriented aggregation, primary crystallites coalesce amongst themselves to form new secondary crystals composed of oriented subunits [27][28][29][30]. Since the primary nanocrystals almost always aggregate into disordered solids, it is necessary to incorporate su ciently strong surface protecting layers using various organic ligands [31], surfactants [32] and polymers [33].…”

“…The synthesis of NPs was done by chemical co-precipitation method which was further characterized by by washing with distilled water and ethanol followed by decantation using a magnetic. The solution obtained was then centrifuged and the precipitate obtained was dried for at least 8 hours at 80°C in order to remove excess water [33].…”

“…Some important characteristics such as the glass transition temperature (Tg) was found to be 207 K for PEG 200 and that of PMMA was 378 K [44]. The T max derived from the thermogravimetric analysis was found to be 562 ºC for PMMA [33] and the same for PEG was 800 ºC [45]. These modi ed NPs can be e ciently implemented in drug delivery due to their ability to hold the poorly soluble drugs in its hydrophobic cavity resulting in the targeted drug release [42].…”

“…(%) solution of PMMA was prepared by addition of the required quantity of PMMA beads in toluene which was stirred mechanically till the beads were completely dissolved[34]. This preparation method has already been reported by Dan and co-workers[33].…”