Dr Peter Duxson

BE (Hons.)(Chem.), The University of Melbourne 2001 BA (Chinese), The University of Melbourne 2001 Ph.D. (Chem. & Biomol. Eng.), The University of Melbourne, 2006. Research Fellow Email: duxsonp@unimelb.edu.au Telephone: (61) 3 8344 8755 Fax: (61) 3 8344 4153 Room 2.5, Chemical & Biomolecular Engineering Building 2 Thesis link (UoM eprints) Back to GMPG People..

Summary

The investigation of the molecular structure of geopolymeric materials by multi-nuclear solid- and solution-state NMR has yielded detailed structural information that has enabled a better mechanistic understanding of the geopolymerisation process. A new theoretical model has been formed, incorporating Al-O-Al linkages, which can be used to explain previously poorly understood properties, such as durability, acid resistance, mechanical strength, and more specifically, the thermal properties of geopolymers. Detailed investigations of the kinetics and mechanisms of dehydration, changes in molecular structure and crystallography from ambient temperature to 1000 C have also been undertaken. These investigations, using 29Si, 27Al, 17O, 2H and 1H MAS and 3QMAS-NMR, XRD with Rietveld structural refinement, DTA, TGA and Electron Microscopy (Scanning and Transmission), have been performed at the University of Melbourne and the University of Illinois at Urbana-Champaign as part of a collaborative agreement with the United States Air Force, as well as at the National High Magnetic Field Laboratory, Florida State University, USA.

 Dr Peter Duxson is also Business Development Manager of Zeobond Pty Ltd.

Awards & Scholarships

INNOVIC Next Big Thing award 2008

PORES (Postgraduate Overseas Research Experience Scholarship), awarded by The University of Melbourne, Aug-Nov 2003, value $3000.

NANO TAP (Nanostructural Analysis Network Organisation Travel and Access Plan), awarded by NANO, Apr 2004, value $1500.

MATS (Melbourne Abroad Travelling Scholarship), awarded by The University of Melbourne, Apr-May 2004, value $1500.

NANO TAP (Nanostructural Analysis Network Organisation Travel and Access Plan), awarded by NANO, Aug 2004, value $1800.

NHMFL Development Access Proposal (National High Magnetic Field Laboratory), awarded by Florida State University, Sep 2005, value (contribution in lieu).

Travel Support for Young Scientists for 1st Asia-Pacific NMR Symposium, awarded by Organising Committee, Nov 2005, value $700.

 

 

Publications

Journal Papers

1. Provis, J.L.; Yong, C.Z.; Duxson, P.; van Deventer, J.S.J. “Correlating mechanical and thermal properties of sodium silicate-fly ash geopolymers,” Colloids and Surfaces A - Physicochemical and Engineering Aspects, accepted for publication November 2008. [link]
2. Provis, J.L.; Duxson, P.; Harrex, R.M.; Yong, C.Z.; van Deventer, J.S.J. “Valorisation of fly ashes by geopolymerization,” Global NEST, accepted for publication October 2008.
3. Duxson, P.; Provis, J.L. “Designing precursors for geopolymer cements,” Journal of the American Ceramic Society, accepted for publication September 2008. [link]
4. Duxson, P.; Provis, J.L.; Lukey, G.C.; van Deventer, J.S.J. "The role of inorganic polymer technology in the development of 'Green Concrete'," Cement and Concrete Research, 2007, 37(12), 1590-1597. [link]
5. Duxson, P., Lukey, G.C., Mallicoat, S. W., Kriven, W. M. and van Deventer, J.S.J., Effect of alkali and Si/Al ratio on the development of mechanical properties of metakaolin-based geopolymers. Colloids and Surfaces A - Physicochemical and Engineering Aspects, 2007, 292(1): 8-20. [link]
6. Duxson, P., Lukey, G.C. and van Deventer, J.S.J., Effect of alkali cations on the thermal evolution of metakaolin geopolymers: Part 2 Phase stability and structural development, Journal of Non-Crystalline Solids, 2007, 353(22-23), 2186-2200 . [link]
7. Duxson, P., Fernandez-Jimenez, A., Provis, J. L., Lukey, G. C., Palomo, A., & van Deventer, J. S. J. Geopolymer technology: The current state of the art. Journal of Materials Science,2007, 42(9), 2917-2933. [link]
8. Duxson, P., Lukey, G.C. & van Deventer, J.S.J., Characteristics of thermal shrinkage and weight loss in Na-geopolymers derived from metakaolin, Journal of Materials Science, 2007, 42(9), 3044-3054 . [link]
9. Van Deventer, J.S.J., Provis, J.L., Duxson, P. & Lukey, G.C., Reaction mechanisms in the geopolymeric conversion of inorganic waste to useful products, Journal of Hazardous Materials, 2007, A139(3): 506-513. [link]
10. Duxson, P., Lukey, G.C. and van Deventer, J.S.J., Effect of alkali cations on the thermal evolution of metakaolin geopolymers: Part 1 Physical evolution, Journal of Non-Crystalline Solids, 2006, 352(22-24): 5541-5555. [link]
11. Duxson, P., Provis, J.L., Lukey, G. C., van Deventer, J.S.J., Separovic, F., Gan, Z. "39K NMR of free potassium in geopolymers," Industrial & Engineering Chemistry Research, 2006, 45(26): 9208-9210. [link]
12. Duxson, P., Lukey, G.C., & van Deventer, J.S.J., Structural evolution and phase stability of Na-geopolymers derived from metakaolin up to 1000 C, Langmuir, 22(21): 8750-8757, 2006. [link]
13. Duxson, P., Lukey, G.C., Separovic, F. & Van Deventer, J.S.J., Effect of alkali cations on aluminum incorporation in geopolymeric gels, Industrial & Engineering Chemistry Research, vol. 44, no. 4, 2005, pp. 832-839. [link]
14. Duxson, P., Provis, J.L., Lukey, G.C., Separovic, F. & Van Deventer, J.S.J., 29Si NMR study of structural ordering in aluminosilicate geopolymer gels," Langmuir, vol. 21, no. 7, 2005, pp. 3028-3036. [link]
15. Duxson, P., Provis, J.L., Lukey, G.C., Mallicoat, S.W., Kriven, W.M. & Van Deventer, J.S.J., Understanding the relationship between geopolymer composition, microstructure and mechanical properties, Colloids and Surfaces A, vol. 269, nos.1-3, 2005, pp. 47-58. [link]
16. Provis, J.L., Duxson, P., Lukey, G.C., Separovic, F., Kriven, W.M. & Van Deventer, J.S.J., Modeling speciation in highly concentrated alkaline silicate solutions, Industrial & Engineering Chemistry Research, vol. 44, no. 23, 2005, pp. 8899-8908. [link]
17. Provis, J.L., Duxson, P., Lukey, G.C. & Van Deventer, J.S.J., A statistical thermodynamic model for Si/Al ordering in amorphous aluminosilicates," Chemistry of Materials, vol. 17, no. 11, 2005, pp. 2976-2986. [link]
18. Provis, J.L., Duxson, P., Lukey, G.C. & Van Deventer, J.S.J., The role of mathematical modelling and gel chemistry in advancing geopolymer technology, Chemical Engineering Research and Design, vol. 83, no. A7, 2005, pp. 853-860. [link]