Preparation and characterization of hydrophobic superparamagnetic gel.
The present study describes the preparation and analysis of a highly concentrated hydrophobic oleic acid-coated magnetite gel. By contrast to conventional techniques to prepare magnetic fluids, herein the oleic acid was introduced as a reactant during the initial crystallization phase of magnetite that was obtained by the co-precipitation of Fe(II) and Fe(III) salts by addition of ammonium hydroxide. The resulting gelatinous hydrophobic magnetite was characterized in terms of morphology, particle size, magnetic properties, crystal structure, and hydrophobicity/hydrophilicity. This magnetic gel exhibited superparamagnetism with a saturation magnetization of 46.0 emu/g at room temperature and could be well dispersed both in polar and nonpolar carrier liquids. This protocol produced highly concentrated hydrophobic magnetic gel for biopolymer encapsulations.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOD; OUS
- DOE Contract Number:
- DE-AC02-06CH11357
- OSTI ID:
- 939308
- Report Number(s):
- ANL/CMT/JA-55941; JMMMDC; TRN: US200823%%76
- Journal Information:
- J. Magn. Magn. Mater., Vol. 306, Issue 2006; ISSN 0304-8853
- Country of Publication:
- United States
- Language:
- ENGLISH
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