Can anyone tell me which water based ferrofluid has completely hydrophilic nanoparticles in order that in contact with an oil phase the nanoparticles always stay in the water phase?
We have used Pluronic F-127 to prepare hydrophilic oleic acid stabilized magnetite particles. The particles were subsequently functionalised with doxorubucin. The details of the method and limitations of other methods are described in the following paper.
J Nanopart Res (2011) 13:1677–1688
DOI 10.1007/s11051-010-9921-6
you want hydrophilic dispersible NPs, you need to use hydrophilic shells around the NPs such as PEG, Silica, Chitosan,...
We have used Pluronic F-127 to prepare hydrophilic oleic acid stabilized magnetite particles. The particles were subsequently functionalised with doxorubucin. The details of the method and limitations of other methods are described in the following paper.
J Nanopart Res (2011) 13:1677–1688
DOI 10.1007/s11051-010-9921-6
You can use a iron oxide nanoparticle coated with PEG
PEGylation of SPIONs by polycondensation reactions: a new strategy to improve colloidal stability in biological media
http://link.springer.com/article/10.1007%2Fs11051-013-1824-x
Sodium oleate and oleic acid has limitation that it has better affinity with hydrocarbons than water. PEG is versatile in the sense that one can use a large number of solvent for dispersion of PEG coated SPIONs and hence PEG as well as dextran are used for biomedical applications.
I think the best way to make the ferrofluid not to be transfered to an oil phase is to make the surface charged. Look at our paper: J. Nanopart Res. (2013) 15:1372, DOI 10.1007/s11051-012-1372-9 , link: http://link.springer.com/article/10.1007%2Fs11051-012-1372-9
- Badges
- Science topic
- Similar topics
- Chemistry
- Nanotechnology
- Nanostructured Materials
- Nanoparticles