A new method for the preparation of monoporous hollow microspheres

Ming W. Chang, Eleanor Stride, Mohan Edirisinghe

Research output: Contribution to journalArticle

92 Citations (Scopus)

Abstract

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.

LanguageEnglish
Pages5115-5121
Number of pages7
JournalLangmuir
Volume26
Issue number7
DOIs
Publication statusPublished - 6 Apr 2010

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electrohydrodynamics
atomizing
Microspheres
hollow
porosity
preparation
encapsulating
Electrohydrodynamics
Atomization
flow velocity
surfactants
scanning electron microscopy
electric potential
liquids
Surface-Active Agents
Pore size
Surface active agents
temperature
Flow rate
Scanning electron microscopy

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Chang, Ming W. ; Stride, Eleanor ; Edirisinghe, Mohan. / A new method for the preparation of monoporous hollow microspheres. In: Langmuir. 2010 ; Vol. 26, No. 7. pp. 5115-5121.
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A new method for the preparation of monoporous hollow microspheres. / Chang, Ming W.; Stride, Eleanor; Edirisinghe, Mohan.

In: Langmuir, Vol. 26, No. 7, 06.04.2010, p. 5115-5121.

Research output: Contribution to journalArticle

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