Journal
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
Volume 515, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.jmmm.2020.167265
Keywords
Iron oxide superparticles; Solvothermal synthesis; Polymer coating; Magnetic separation
Funding
- NSF-CBET [1915873]
- Merrymac-McKcinley Foundation
- Alabama Life Research Institute
- University of Alabama at Birmingham
- DARPA TEE Award [D18AP00011]
- Div Of Chem, Bioeng, Env, & Transp Sys
- Directorate For Engineering [1915873] Funding Source: National Science Foundation
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Iron oxide superparticles referring to a cluster of smaller nanoparticles have recently attracted much attention because of their enhanced magnetic moments but maintaining superparamagnetic behavior. In this study, iron oxide superparticles have been synthesized using a solvothermal method in the presence of six different polymers (e.g., sodium polyacrylate, pectin sodium alginate, chitosan oligosaccharides, polyethylene glycol, and polyvinylpyrrolidine). The functional group variation in these polymers affected their interactions with precursor iron ions, and subsequently influenced crystalline grain sizes within superparticles and their magnetic properties. These superparticles were extensively characterized by transmission electron microscopy, dynamic light scattering, x-ray diffraction, Fourier transform infrared spectroscopy, and vibrating sample magnetometry.
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