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Production of Starch Nanoparticles Through Solvent-Antisolvent Precipitation in a Spinning Disc Reactor

Lookup NU author(s): Sahr Sana, Professor Kamelia Boodhoo, Dr Vladimir Zivkovic



This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).


© 2019 Sana et al.The spinning disc reactor (SDR) uses surface rotation to produce thin film flow with improved mixing and reduced residence times in chemical processing applications. Solvent-antisolvent precipitation is one such process that can benefit from these properties. This study investigates the film hydrodynamics and precipitation of starch nanoparticles by contacting starch dissolved in sodium hydroxide with ethanol as the antisolvent. One objective of this study is to understand how interactions of the disc surface topography (grooved and smooth) with other parameters such as liquid flowrate, antisolvent to solvent flow ratio and disc speed impact the mixing and precipitation processes. Results indicate that an increase in flow rate and rotational speed leads to smaller nano-particles and narrower size distributions, which is attributed to increased shear and instabilities within the liquid film. It was also observed that an increased antisolvent to solvent ratio caused a reduction in particle size, as increased antisolvent generated higher supersaturation. Results showed that although particle size was not significantly influenced by the disc texture, the size distribution was narrower and higher yields were obtained with the grooved disc surface. The grooved disc therefore offers the opportunity for higher throughput in the solvent-antisolvent precipitation of starch particles with better product quality.

Publication metadata

Author(s): Sana S, Boodhoo KVK, Zivkovic V

Publication type: Article

Publication status: Published

Journal: Green Processing and Synthesis

Year: 2019

Volume: 8

Issue: 1

Pages: 507-515

Online publication date: 18/05/2019

Acceptance date: 21/02/2019

Date deposited: 04/03/2019

ISSN (print): 2191-9542

ISSN (electronic): 2191-9550

Publisher: Walter de Gruyter GmbH


DOI: 10.1515/gps-2019-0019


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