- Title
- Systematic Analysis of The Effects of Polymer Molecular Weight on Colloidal PEI-TMOMS silica Particle Synthesis
- Creator
- D'Acquisto, Daniel; Moreno-Atanasio, Roberto; Neville, Frances
- Relation
- Chemeca 2018. Proceedings of the Chemeca 2018 (Queenstown, NZ 30 September - 03 October, 2018) p. 56.1-56.11
- Publisher Link
- http://dx.doi.org/10.3316/INFORMIT.048470063059165
- Publisher
- Institution of Chemical Engineers
- Resource Type
- conference paper
- Date
- 2018
- Description
- Silica is the most common component of the Earth's surface and its importance as a solid material has increased in recent years. Therefore, methods of silica particle production have become an important area of research. The production of colloidal particles using lower risk chemicals and without harsh reaction conditions has become a priority in silica particle production methods. The biomimetic polymer, polyethyleneimine (PEI) and trimethoxymethylsilane (TMOMS) silica source have been identified as reagents that may be used in such syntheses. In this work, an in depth, systematic analysis of colloidal PEI-TMOMS silica particle synthesis was undertaken by varying PEI and TMOMS concentrations during particle production for three different molecular weights of PEI, to observe trends in particle size and dispersity as a result of these variations. The particles produced using the linear 2 kDa PEI were much larger than the other molecular weight PEIs, but had a tendency to form polydisperse, aggregated populations that experienced the greatest change in size as a function of reagent concentration. 25 kDa and 750 kDa PEI formed populations that were relatively monodisperse with particles of a comparable size. The results demonstrate that a variation in reagent concentration and polymer molecular weight has significant effects on the formation of PEI-TMOMS silica particles in terms of size, shape and dispersity which may have an impact on the methods used to produce particles for specific uses.
- Subject
- silica particles; polyethyleneimine; trimethoxymethylsilane
- Identifier
- http://hdl.handle.net/1959.13/1441324
- Identifier
- uon:41389
- Identifier
- ISBN:9781911446682
- Language
- eng
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