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Rheological Behavior of Nanoclay Containing Nanofluids

Published online by Cambridge University Press:  04 February 2011

Jeffrey C. Munro  and
YuanQiao Rao
Jeffrey C. Munro
Affiliation:
Core R&D Labs, The Dow Chemical Company, 2301 N. Brazosport Blvd., Freeport, TX 77541, U.S.A.
YuanQiao Rao
Affiliation:
Core R&D Labs, The Dow Chemical Company, 2301 N. Brazosport Blvd., Freeport, TX 77541, U.S.A.
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Abstract

A synthetic hectorite nanoclay, Laponite®, with a disc shape (20 – 30 nm in diameter and 1 nm in thickness) was used as a model nanoparticle to prepare dispersions in water and different organic solvents. Although up to 20 wt% of nanoclay can be dispersed in water to form a low-viscosity stable colloidal sol, dispersions in organic solvents behave differently. The effect of the dielectric constant of the medium on the viscosity of the dispersion was studied systematically using two series of water-organic solvent miscible blends. Changes in the rheological behavior of the dispersions suggest that the dielectric constant of the organic solvent is a determining factor in the sol-gel transition of a nanoclay-containing nanofluid.

Keywords

colloidnanoscalefluid
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1312: Symposium HH/II/JJ – Polymer-Based Materials and Composites—Synthesis, Assembly and Applications , 2011 , mrsf10-1312-ii06-03
Copyright
Copyright © Materials Research Society 2011

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References

REFERENCES

1. Krishnamoorti, R. and Giannelis, E.P. Macromolecules 1997, 30, 4097–4102.Google Scholar
2. Cassagnau, P. Polymer 2008, 49, 2183–2196.Google Scholar
3. Plummer, C.J.; Rodlert, M.; Bucaille, J.; Grunbauer, H.J.; and Manson, J.E. Polymer 2005, 46, 6543–6553.Google Scholar
4. Sun, L.; Boo, W.J.; Liu, J.; Clearfield, A.; Sue, H.J.; Verghese, N.E.; Pham, H.Q.; and Bicerano, J. Macromol. Mater. Eng. 2009, 294, 103–113.Google Scholar
5. Loiseau, A. and Tassin, J.F. Macromolecules 2006, 39, 9185–9191.Google Scholar
6. Wang, H.; Hoa, S.V.; and Wood-Adams, P.M. J. Appl. Polym. Sci. 2006, 100, 4286–4296.Google Scholar
7. Estimate is based on the assumptions that each platelet occupies a sphere with diameter equal to the diameter of the platelet, maximum packing density for randomly-packed spheres is approximately 30 vol%, density of Laponite is 2.57 g/cm3, and platelet diameter is 30 nm. Estimate follows analysis found in ref [5] Google Scholar
8. Barnes, H.A. Colloids Surf., A 1994, 91, 89–95.Google Scholar
9. Cheng, P.Y. and Schachman, H.K. J. Polym. Sci. 1955, 16, 19–30.Google Scholar
10. Haber, S. and Brenner, H. J. Colloid Interface Sci. 1984, 97, 496–514.Google Scholar
11. Tadros, T. Adv. Colloid Interface Sci. 2004, 108–109, 227 – 258.Google Scholar
12. Thomas, D.G. J. Colloid Sci. 1965, 20, 267–277.Google Scholar
13. Wierenga, A.M. and Philipse, A.P. Colloids Surf., A 1998, 137, 355–372.Google Scholar
14. Raju, G.G. Dielectrics in Electric Fields. Marcel Dekker, New York, 2003.Google Scholar