Cookies on this website
We use cookies to ensure that we give you the best experience on our website. If you click 'Continue' we'll assume that you are happy to receive all cookies and you won't see this message again. Click 'Find out more' for information on how to change your cookie settings.

The feasibility of producing a hollow microsphere with a single hole in its shell by coaxial electrohydrodynamic atomization (CEHDA) is demonstrated. Polymethylsilsesquioxane (PMSQ) was used as a model shell material encapsulating a core of a volatile liquid, perfluorohexane (PFH), which was subsequently evaporated to produce the hollow microspheres. The diameters of the microspheres and of the single surface pore were controlled by varying the flow rate of the components, the concentration of the PMSQ solution, and the applied voltage in the CEHDA process. The particles were characterized by scanning electron microscopy, and the ranges obtained were 275-860 nm for the microsphere diameter and 35-135 nm for the pore size. The process overcomes several of the key problems associated with existing methods of monoporous microsphere formation including removing the need for elevated temperatures, multiple processing steps, and the use of surfactants and other additives.

Original publication

DOI

10.1021/la903592s

Type

Journal article

Journal

Langmuir : the acs journal of surfaces and colloids

Publication Date

04/2010

Volume

26

Pages

5115 - 5121

Addresses

Department of Mechanical Engineering, University College London, Torrington Place, London WC1E 7JE, UK.

Keywords

Fluorocarbons, Organosilicon Compounds, Polymers, Microscopy, Electron, Scanning, Microspheres, Porosity