- Title
- Effect of mixing on bioinspired polyethyleneimine-silicaparticle formation
- Creator
- Seyfaee, Ahmad; Hyde, Emily D. E. R.; Aubin, Joelle; Moreno-Atanasio, Roberto; Neville, Frances
- Relation
- Chemeca 2016: Chemical Engineering - Regeneration, Recovery and Reinvention. Proceedings of Chemeca 2016: Chemical Engineering - Regeneration, Recovery and Reinvention (Adelaide, S.A. 25-28 September, 2016) p. 333-342
- Relation
- http://www.chemeca2016.org
- Publisher
- Engineers Australia
- Resource Type
- conference paper
- Date
- 2016
- Description
- Colloidal silica particles have found a wide variety of applications including uses in chemical analysis, catalyst, sensor and bio-medicinal fields. Current industrial production of silica, however,relies on high temperatures or harsh conditions. Bioinspired synthesis routes provide a way to circumvent these issues as well as possibly enhancing the control of particle formation beyond what is currently possible with commercial methods. Previous work has demonstrated monodisperse "PEIsilica" particles can be synthesized from non-toxic hydrolysed trimethoxymethylsilane (TMOMS) and the biomimetic catalyst polyethyleneimine (PEI) through a polymerisation condensation proceeding at room temperature. In this work the role of mixing (through magnetic stirring and sonication during the reaction period) on final particle size and morphology was investigated. No mixing reactions, mixing by sonication and mixing by magnetic stirring were chosen as the three preparation modes. The results of the no mixing reactions showed that the particle polydispersity as well as their average size was sensitive to the location of precursor injection. Mixing by sonication broadened the particle size distribution compared to no mixing reactions. Finally, in the magnetic stirring experiments, the rate of stirring could increase or decrease the final particle size, depending on the concentration of PEI. Overall, determining the relationship between the desired characteristics of the particles and the reaction mixing conditions is extremely beneficial for the optimisation of the particle synthesis process, especially when considering silica particle applications that require control of specific interactions, such as in mineral separation, catalysis and drug delivery.
- Subject
- silica synthesis; mixing; particle formation
- Identifier
- http://hdl.handle.net/1959.13/1322311
- Identifier
- uon:24558
- Identifier
- ISBN:9781922107831
- Language
- eng
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