| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Sefcik, Jan
University of Strathclyde
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (10/10 displayed)
- 2023Machine Learning-Derived Correlations for Scale-Up and Technology Transfer of Primary Nucleation Kinetics.
- 2023Machine learning derived correlations for scale-up and technology transfer of primary nucleation kineticscitations
- 2019Measuring secondary nucleation through single crystal seedingcitations
- 2018Enabling precision manufacturing of active pharmaceutical ingredientscitations
- 2017Kinetics of early stages of resorcinol-formaldehyde polymerization investigated by solution phase nuclear magnetic resonance spectroscopycitations
- 2013250 nm glycine-rich nanodroplets are formed on dissolution of glycine crystals but are too small to provide productive nucleation sitescitations
- 2011Structure of laponite-styrene precursor dispersions for production of advanced polymer-clay nanocompositescitations
- 2009Characterization of arsenic-rich waste slurries generated during GaAs wafer lapping and polishing
- 2008Formation of valine microcrystals through rapid antisolvent precipitationcitations
- 2003Monte Carlo simulations of size and structure of gel precursors in silica polycondensationcitations
Places of action
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article
Structure of laponite-styrene precursor dispersions for production of advanced polymer-clay nanocomposites
Abstract
One method for production of polymer-clay nanocomposites involves dispersal of surface-modified clay in a polymerisable monomeric solvent, followed by fast in situ polymerisation. In order to tailor the properties of the final material we aim to control the dispersion state of the clay in the precursor solvent. Here, we study dispersions of surface-modified Laponite, a synthetic clay, in styrene via large-scale Monte-Carlo simulations and experimentally, using small angle X-ray and static light scattering. By tuning the effective interaction between simulated laponite particles we are able to reproduce the experimental scattering intensity patterns for this system, with good accuracy over a wide range of length scales. However, this agreement could only be obtained by introducing a permanent electrostatic dipole moment into the plane of each Laponite particle, which we explain in terms of the distribution of substituted metal atoms within each Laponite particle. This suggests that Laponite dispersions, and perhaps other clay suspensions, should display some of the structural characteristics of dipolar fluids. Our simulated structures show aggregation regimes ranging from networks of long chains to dense clusters of Laponite particles, and we also obtain some intriguing ‘globular’ clusters, similar to capsids. We see no indication of any ‘house-of-cards’ structures. The simulation that most closely matches <br/>experimental results indicates that gel-like networks are obtained in Laponite dispersions, which however appear optically clear and non-sedimenting over extended periods of time. This suggests it could be difficult to obtain truly isotropic equilibrium dispersion as a starting point for synthesis of <br/>advanced polymer-clay nanocomposites with controlled structures.