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Large-Scale Morphology of Dispersed Layered Silicates

Published online by Cambridge University Press:  01 February 2011

Dale W. Schaefer ,
Ryan S. Justice ,
Hilmar Koerner ,
Richard Vaia ,
Chungui Zhao ,
Mingshu Yang  and
Jim Vale
Dale W. Schaefer
Affiliation:
Chemical and Materials Engineering, University of Cincinnati, Cincinnati, OH, 45221–0012 USA. Institute of Chemistry, Chinese Academy of Sciences, Beijing, China.
Ryan S. Justice
Affiliation:
Chemical and Materials Engineering, University of Cincinnati, Cincinnati, OH, 45221–0012 USA.
Hilmar Koerner
Affiliation:
University of Dayton Research Institute, Dayton, Ohio, USA
Richard Vaia
Affiliation:
Air Force Research Laboratory, WPAFB, OH, USA.
Chungui Zhao
Affiliation:
Institute of Chemistry, Chinese Academy of Sciences, Beijing, China.
Mingshu Yang
Affiliation:
Institute of Chemistry, Chinese Academy of Sciences, Beijing, China.
Jim Vale
Affiliation:
Givaudan Flavors Corporation, Cincinnati, OH 45216, USA
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Abstract

Ultra small angle x-ray scattering is used to probe the morphology of highly dispersed montmorillonite (MMT) in water and polyamide-66. In water the scattered intensity, I(q) shows a q-2 dependence for q > 0.01 Å-1, where q is the magnitude of the scattering vector. This is as expected for a two dimensional sheet-like object. On larger scales (smaller q) mass-fractal character is evident up to the radius-of-gyration of the individual scattering entities. The scattering profile is interpreted using a semi-flexible sheet model in which flat, disk-like entities of radius = 80 Å (an areal persistence length) are fractally distributed on large scales with a mass fractal dimension of 2.65. These size scales correspond to a scattering entity comprised of one or a few crumpled sheets. No evidence of inter-particle correlations is found at concentrations below the gel point. In polyamide-66 loaded with organically modified MMT long-range fractal behavior is also observed but with larger fractal dimension.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 840: Symposium Q – Neutron and X-Ray Scattering as Probes of Multiscale Phenomena , 2004 , Q3.3
Copyright
Copyright © Materials Research Society 2005

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References

REFERENCES

1. Tolle, T. B. and Anderson, D. P., Composites Science and Technology 62, 1033–1041 (2002).Google Scholar
2. Bhatia, S., Barker, J. and Mourchid, A., Langmuir 19, 532–535 (2003).Google Scholar
3. Bihannic, I., Tchoubar, D., Lyonnard, S., Besson, G. and Thomas, F., Journal of Colloid and Interface Science 240, 211–218 (2001).Google Scholar
4. Levitz, P., Lecolier, E., Mourchid, A., Delville, A. and Lyonnard, S., Europhysics Letters 49, 672–677 (2000).Google Scholar
5. Morvan, M., Espinat, D., Lambard, J. and Zemb, T., Colloids and Surfaces a-Physicochemical and Engineering Aspects 82, 193–203 (1994).Google Scholar
6. Kroon, M., Vos, W. L. and Wegdam, G. H., Physical Review E 57, 1962–1970 (1998).Google Scholar
7. Pignon, F., Piau, J. M. and Magnin, A., Physical Review Letters 76, 4857–4860 (1996).Google Scholar
8. Pignon, F., Magnin, A., Piau, J. M., Cabane, B., Lindner, P. and Diat, O., Physical Review E 56, 3281–3289 (1997).Google Scholar
9. Ho, D. L., Briber, R. M. and Glinka, C. J., Chemistry of Materials 13, 1923–1931 (2001).Google Scholar
10. Vaia, R. A., Liu, W. D. and Koerner, H., Journal of Polymer Science Part B-Polymer Physics 41, 3214–3236 (2003).Google Scholar
11. Yu, Z.-Z., Yang, M., Zhang, Q., Zhao, C. and Mai, Y.-W., Journal of Polymer Science: Part B: Polymer Physics 41, 1234–1243 (2003).Google Scholar
12. Beaucage, G., Journal of Applied Crystallography 28, 717–728 (1995).Google Scholar
13. Beaucage, G. and Schaefer, D. W., Journal of Non-Crystalline Solids 172, 797–805 (1994).Google Scholar
14. Teixeira, J., Journal Of Applied Crystallography 21, 781–785 (1988).Google Scholar