- Title
- Experimental results and theoretical modeling of the growth kinetics of polyamine-derived silica particles
- Creator
- Seyfaee, Ahmad; Neville, Frances; Moreno-Atanasio, Roberto
- Relation
- Industrial and Engineering Chemistry Research Vol. 54, Issue 9, p. 2466-2475
- Publisher Link
- http://dx.doi.org/10.1021/acs.iecr.5b00093
- Publisher
- American Chemical Society
- Resource Type
- journal article
- Date
- 2015
- Description
- Polyamine-derived silica particles are proposed to grow due to primary particle (<25 nm) aggregation. On the basis of material balance, we propose an aggregation model to predict the kinetics of polyamine-derived silica formation. The model is based on a rate equation consisting of two terms, representing both the production and aggregation of primary particles. The modeled rate constants were found to be a function of the concentration of silica precursor and biomimetic catalyst. Our experimental results agree with our model and suggest that the cube root of the silica precursor concentration is linearly proportional to particle diameter, as well as that below a critical concentration (~25 mM) no particles will be formed. If the concentration of reagents was high enough to produce particles with diameters greater than ~350 nm, other populations of particles, each of them growing at different rates, were necessary to describe the overall particle diameter observed, which was modeled as the average diameter of these different populations.
- Subject
- polyamine-derived silica particles; growth kinetics; silica formation
- Identifier
- http://hdl.handle.net/1959.13/1336810
- Identifier
- uon:27708
- Identifier
- ISSN:0888-5885
- Language
- eng
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