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FindA University Ltd Featured PhD Programmes

Quantitative Visualization of Dissolution and Crystallization of Agrochemical Active Ingredients (AIs)


Project Description

Agrochemical formulations typically comprise an active ingredient (AI), which is a particular organic molecule, together with a large concentration of surfactant in water to assist with uptake of the AI to a target (e.g. leaf). It is increasingly recognized that dissolution/crystallization of organic materials is of major importance in determining the action and efficacy of AIs and that a better understanding of these processes would lead to a greatly improved delivery process, with – for example - the possibility of using less AI in the future, which would be hugely beneficial. The goal of this project is to use state of the art measurements techniques and concepts developed at Warwick to investigate dissolution/crystallization processes in real time. Experimental data will be used to paramaterise finite element method models to predict intrinsic dissolution/crystallization rates. There will be considerable scope to liaise with colleagues at Syngenta to develop experiments and build models on complex multi-crystal systems, including effects such as evaporation, precipitation, and the impact of the substrate chemistry.
The Warwick Electrochemistry and Interfaces Group (WEIG) has outstanding facilities and reputation for the development and use of innovative (imaginative) techniques. The project is part of the CDT in Molecular Analytical Science and will also offer training in the first 2 years of the PhD (leading to a certificate). It will further be associated with the EPSRC programme grant “Crystallization in the Real World”, which brings together 8 leading experimental and theory groups in the UK (Leeds, Warwick, UCL and Sheffield), and provides an excellent environment for research in this area.

Funding Notes

The project is fully funded for 3.5 years with all fees paid and a yearly stipend of approx £16,000 for 2019/20. The start date is 1 Sep 2019 or as soon after as possible.
This project is part of the MAS CDT and the successful candidate will have the opportunity to take some Analytical Science MSc modules as part of their training.

References

Example references (from our work): 1. F. M. Maddar, D. Perry and P. R. Unwin, Cryst. Growth Des., 2017, 17, 6565 - 6571. 2. D. Perry, A. S. Parker, A. Page and P. R Unwin, ChemElectroChem, 2016, 3, 2212 - 2220. 3. F. M. Maddar, M. Adobes-Vidal, L. P. Hughes, S. A. C. Wren and P. R. Unwin, Cryst. Growth Des., 2017, 17, 5108 - 5116. 4. M. Adobes-Vidal, A. G. Shtukenberg, M. D. Ward and P. R. Unwin, Cryst. Growth Des., 2017, 17, 1766 - 1774. 5. M. Adobes-Vidal, F. M. Maddar, D. Momotenko, L. P. Hughes, S. A. C. Wren, L. N. Poloni, M. D. Ward and P. R. Unwin, Cryst. Growth Des., 2016, 16, 4421- 4429.

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