Skip to main content
Article thumbnail
Location of Repository

Chemical synthesis of nanoparticles and electrohydrodynamic manipulation of nanoparticulate suspensions

By Zsuzsanna Libor

Abstract

This research concerns the study of nanoparticle synthesis methods and the influence that nanoparticles can have on the physical and electrical properties of non-polar fluids. In this study it is demonstrated that a very small volume fraction of nanoparticles can have a very large effect on the macroscopic properties of fluids. Characterization of nanoparticles and nanofluids has led to the creation of new techniques for controlled deployment of nanoparticles within larger structures. A new dielectrophoretic technique can be used for (1) uniformly sized droplet generation and manipulation with controllable droplet size, (2) oil-in-water emulsion creation in unique way, (3) recycling nanoparticles from nanoparticulate suspensions and (4) creation of core-shell structures. Different types, sizes and morphologies of nanoparticles have been made successfully by chemical synthesis and new synthesis routes have been created. A new wet chemical route has been devised to synthesise nickel nanoparticles with controllable size and different morphology including new shapes such as micro-flower and nano-stars. PZT nanoparticles have been synthesized hydrothermally with controllable size and new morphologies created such as nearly spherical nanoparticles and pellets. A novel wet chemical synthesis method was developed to produce core-shell structures of Ni- and also Fe3O4 - coated SiO2, BT, and PZT particles. The characterization of non-polar fluid-based nanofluids included a sedimentation study, studies of the fluidic properties (viscosity and surface tension) and electrical properties such as DC conductivity and dielectric permittivity. The results clearly show that the macroscopic properties of base fluids (silicone oil and perfluorinated oil) were changed even with a very low concentration (< 0.6 vol %) of nanoparticles added. The properties of nanofluids are found to depend on the properties of the base fluid and also on the properties of the dispersed nanoparticles. Importantly, the properties are demonstrated to depend on the fluid-particle interaction

Publisher: Cranfield University
Year: 2009
OAI identifier: oai:dspace.lib.cranfield.ac.uk:1826/4486
Provided by: Cranfield CERES

Suggested articles

Citations

  1. (1989). A new technique for the production of immobilized biocatalyst in large quantities. doi
  2. (2003). Anaerobic biodesulfurization of thiophenes.
  3. Bielaga BA.1990.Toward sulfur-freefuels.Chemtech 20:747–751.
  4. (1998). Biocatalytic sulfur removal from fuels: Applicability for producing low sulfur gasoline. Crit Rev Microbiol 24:99–147. doi
  5. (2002). Biodegradation of crude oil across a wide range of salinities by an extremely halotolerant bacterial consortium MPD-M, immobilized onto polypropylene fibers. doi
  6. Biodegradation of gasoline: Kinetics, mass balance and fate of individual hydrocarbons. doi
  7. (2000). Biodesulfurization and the upgrading of petroleum distillates. doi
  8. (2005). Biodesulfurization of dibenzothiophene by microbial cells coated with magnetic nanoparticles. doi
  9. (1997). Biodesulphurisation of dibenzothiophene in hydrophobic media by Rhodococcus sp strain IGTS8. doi
  10. (2002). Degradation of phenol by Rhodococcus erythropolis UPV-1 immobilized in Biolite in a packed-bed reactor. doi
  11. (1999). Developments in destructive and non-destructive pathways for selective desulfurizations in oil biorefining processes. doi
  12. (1996). Genetic analysis of the dsz promoter and associated regulatory regions of Rhodococcus erythropolis IGTS8.
  13. (2007). Immobilization of enzyme on a fibrous matrix. doi
  14. (2001). Long-term repeated biodesulfurization by immobilized Rhodococcus erythropolis KA2-5-1 cells. doi
  15. (1956). Magnetic measurements on individual microscopic ferrite particles near the single-domain. Phys Rev 102:670–673. doi
  16. (1989). Magnetically controlled targeted micro-carrier systems. doi
  17. (2000). Method and apparatus for isolation purification of biomolecules.
  18. (2006). Microbial degradation of sulfur, nitrogen and oxygen heterocycles. doi
  19. (2002). modelof iontransfer acrosslipid bilayer membranes.
  20. (1996). Molecular mechanisms of biocatalytic desulfurization of fossil fuels. doi
  21. (2001). Nanoparticles by chemical synthesis, processing to materials and innovative applications. doi
  22. (2003). Recent advances in petroleum microbiology. doi
  23. (1962). Reconstitution of cell membrane structure in vitro and its transformation into an excitable system. doi
  24. (2005). Two-stage process design for the biodesulfurization of a model diesel by a newly isolated Rhodococcus globerulus DAQ3. Biochem Eng 27:77–82. doi
  25. (1993). Utilization of organosulphur compounds by axenic and mixed cultures of Rhodococcus rhodochrousstrain IGTS8. doi
  26. WernerJ,Palmer S.1999.Microbial desulfurization of alkylated dibenzothiophenes from a hydrodesulfurized middle distillate by Rhodococcus erythropolis I-19. Appl Environ Microbiol 65:4967–9972.

To submit an update or takedown request for this paper, please submit an Update/Correction/Removal Request.