Facile synthesis of oil-soluble Fe3O4 nanoparticles based on a phase transfer mechanism
Source abstract
Abstract
Abstract A stable water-based magnetic fluid was prepared by synthesizing sodium oleate bilayer-coated Fe3O4 nanoparticles via chemical coprecipitation. The adsorption mechanism about excessive sodium oleate coated on particles’ surfaces below and above the isoelectric point of Fe3O4 colloid was proposed. Based on this, a novel and facile phase-transform method to transform hydrophilic particles to lipophilic ones has been schemed by adjusting pH value or adding ethanol. The results showed two different transformation mechanisms. In the acid precipitation method, the bilayer-coated structure was retained, which made the hexane magnetic fluid more stable.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Characterization and Applications of Magnetic Nanoparticles · Magnetic properties of thin films · Power Transformer Diagnostics and Insulation
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (30)
Show source-provided references
1. Progress in applications of magnetic nanoparticles in biomedicine10.1088/0022-3727/42/22/224001 ↗
2. Berkovskići · 1993
3. Blums · 1997
4. Magnetic fluids: fabrication, magnetic properties, and organization of nanocrystals10.1002/1616-3028(200110)11:5<323::AID-ADFM323>3.0.CO;2-J ↗
5. Preparation of dilution-stable aqueous magnetic fluids10.1109/TMAG.1980.1060578 ↗
6. Magnetic fluids bibliography10.1109/TMAG.1980.1060591 ↗
7. Preparation and characterization of the magnetic fluid of trimethoxyhexadecylsilane-coated Fe3O4 nanoparticles10.1021/jp912166b ↗
8. Interaction of fatty acid monolayers with cobalt nanoparticles10.1021/nl035139x ↗
9. Preparation and characterization of hydrophobic superparamagnetic magnetite gel10.1016/j.jmmm.2006.03.049 ↗
10. Synthesis of bilayer oleic acid-coated Fe3O4 nanoparticles and their application in pH-responsive Pickering emulsions10.1016/j.jcis.2007.01.081 ↗
11. Re-examination of characteristic FTIR spectrum of secondary layer in bilayer oleic acid-coated Fe3O4 nanoparticles10.1016/j.apsusc.2009.11.079 ↗
12. Preparation of kerosene-based magnetic fluid under microwave irradiation via phase-transfer method10.1016/j.cej.2008.07.012 ↗
13. Synthesis and magnetic characterization of nickel ferrite nanoparticles prepared by co-precipitation route10.1016/j.jmmm.2008.11.098 ↗
14. Synthesis of iron oxide nanoparticles under oxidizing environment and their stabilization in aqueous and non-aqueous media10.1016/j.jmmm.2006.05.001 ↗
15. A magnetically recoverable scavenger for palladium based on thiol-modified magnetite nanoparticles10.1016/j.apcata.2007.07.018 ↗
16. Adsorption of sodium oleate on nano-sized Fe3O4 particles prepared by coprecipitation10.2174/157341307781422942 ↗
17. A simple way to prepare monolayer films of the magnetite nanocrystal by the Langmuir–Blodgett-like technique10.1016/j.apsusc.2010.02.016 ↗
18. A simple method to synthesize modified Fe3O4 for the removal of organic pollutants on water surface10.1016/j.apsusc.2012.03.031 ↗
19. Magnetic fluid poly(ethylene glycol) with moderate anticancer activity10.1016/j.jmmm.2010.11.060 ↗
20. Thermal properties of magnetic nanoparticles modified with polyethylene glycol, magnetics10.1109/TMAG.2012.2224322 ↗
21. Structure of water-based ferrofluids with sodium oleate and polyethylene glycol stabilization by small-angle neutron scattering: contrast-variation experiments10.1107/S0021889810025379 ↗
22. Silane ligand exchange to make hydrophobic superparamagnetic nanoparticles water-dispersible10.1021/cm0628000 ↗
23. Preparation and characterization of amino–silane modified superparamagnetic silica nanospheres10.1016/j.jmmm.2003.07.006 ↗
24. Surface modification of magnetic nanoparticles capped by oleic acids: characterization and colloidal stability in polar solvents10.1016/j.jcis.2005.06.062 ↗
25. Spectroscopic characterization of the surface of iron oxide nanocrystals10.1021/cm051370v ↗
26. Oleic acid coating on the monodisperse magnetite nanoparticles10.1016/j.apsusc.2006.05.023 ↗
27. Aqueous magnetic fluids stabilized by surfactant bilayers10.1016/S0304-8853(98)00587-3 ↗
28. Surfactant-assisted synthesis of water-soluble and biocompatible semiconductor quantum dot micelles10.1021/nl050017l ↗
29. Hydrothermal preparation of hydrophobic and hydrophilic nanoparticles of iron oxide and a modification with CM-dextran10.1007/s11051-013-1767-2 ↗
30. Synthesis of monodisperse, magnetic latex particles with polystyrene core10.1007/s00396-003-0883-4 ↗