- Title
- The effect of primary particle size distribution on aggregation of nanoparticles: a numerical study
- Creator
- Peng, Z.; Doroodchi, E.; Evans, G.
- Relation
- Chemeca 2010: Engineering at the Edge. Proceedings of Chemeca 2010: Engineering at the Edge (Adelaide, S.A. 26-29 September, 2010)
- Relation
- http://www.chemeca2010.com
- Publisher
- Engineering Australia
- Resource Type
- conference paper
- Date
- 2010
- Description
- The effect of primary particle size distribution (PPSD) on nanoparticles aggregation in colloidal suspensions was investigated numerically by the discrete element model. The aggregate growth and structure in terms of fractal dimension, coordination number and the longest dimension, was examined. Final results show that at small PPSD variances, netlike structure was formed with aggregate branches interconnected in multiple locations, whereas at large variances aggregates with more compact structure and smaller longest dimension were generated. At broader PPSDs, particles assemble faster. The aggregate size distribution inversely appears broader at smaller PPSD variances. The 2D fractal dimension of aggregates increased from 1.46 to 1.55 as PPSD variance increased from 20 to 80, indicating more compact aggregates were formed at broader PPSD. Larger PPSD variance leads to larger coordination number (CN), even though subtle discrepancy has been observed in the evolutional curves of CN. The aggregate size, both mass-equivalent aggregate size and the longest dimension longest dimension, increases as PPSD variances decreases. The predicted result is qualitatively in good agreement with the data published in literature.
- Subject
- nanoparticles aggregation; PPSD variance; fractal dimension; coordination number; aggregate growth; DEM; numerical simulation
- Identifier
- http://hdl.handle.net/1959.13/933051
- Identifier
- uon:11529
- Identifier
- ISBN:9780858259713
- Language
- eng
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