Journal article

A PTFE helical capillary microreactor for the high throughput synthesis of monodisperse silica particles

Hui Yang, Eser Metin Akinoglu, Lijing Guo, Mingliang Jin, Guofu Zhou, Michael Giersig, Lingling Shui, Paul Mulvaney

CHEMICAL ENGINEERING JOURNAL | ELSEVIER SCIENCE SA | Published : 2020

Abstract

We propose a simple and inexpensive SiO2 submicron particle synthesis method based on a PTFE helical capillary microreactor. The device is based on Dean flow mediated, ultrafast mixing of two liquid phases in a microfluidic spiral pipe. Excellent control of particle size between 100 nm and 600 nm and narrow polydispersity can be achieved by controlling the device and process parameters. Numerical simulations are performed to determine the optimal device dimensions. In the mother liquor the silica particles exhibit zeta potentials < −60 mV, rendering them very stable even at high particle volume fractions. The current device typically produces around 0.234 g/h of the silica particles.

Grants

Awarded by Guangdong Innovative and Entrepreneurial Team Program


Awarded by Australian Government through Australian Research Council


Awarded by Science and Technology Planning Project of Guangdong Province


Awarded by Science and Technology Project of Guangdong Province


Awarded by Special Fund Project of Science and Technology Application in Guangdong


Funding Acknowledgements

This work has been funded by the Guangdong Innovative and Entrepreneurial Team Program (No. 2016ZT06C517), the Australian Government through Australian Research Council Grant CE170100026, the Science and Technology Planning Project of Guangdong Province (No. 2016B090906004), the Science and Technology Project of Guangdong Province (No. 2018A050501012), and the Special Fund Project of Science and Technology Application in Guangdong (No. 2017B020240002). E.M.A. acknowledges a Feodor Lynen Research Fellowship by the Alexander von Humboldt Foundation.