Controlling the thickness of hollow polymeric microspheres prepared by electrohydrodynamic atomization

Ming Wei Chang, Eleanor Stride, Mohan Edirisinghe

Research output: Contribution to journalArticle

62 Citations (Scopus)

Abstract

In this study, the ability to control the shell thickness of hollow polymeric microspheres prepared using electrohydrodynamic processing at ambient temperature was investigated. Polymethylsilsesquioxane (PMSQ) was used as a model material for the microsphere shell encapsulating a core of liquid perfluorohexane (PFH). The microspheres were characterized by Fourier transform infrared spectroscopy and optical and electron microscopy, and the effects of the processing parameters (flow-rate ratio, polymer concentration and applied voltage) on the mean microsphere diameter (D) and shell thickness (t) were determined. It was found that the mean diameters of the hollow microspheres could be controlled in the range from 310 to 1000 nm while the corresponding mean shell thickness varied from 40 to 95 nm. The results indicate that the ratio D : t varied with polymer concentration, with the largest value of approximately 10 achieved with a solution containing 18 wt% of the polymer, while the smallest value (6.6) was obtained at 36 wt%. For polymer concentrations above 63 wt%, hollow microspheres could not be generated, but instead PMSQ fibres encapsulating PFH liquid were obtained.

LanguageEnglish
JournalJournal of The Royal Society Interface
Volume7
Issue numberSUPPL. 4
DOIs
Publication statusPublished - 6 Aug 2010

Fingerprint

Electrohydrodynamics
Atomization
Microspheres
Polymers
Liquids
Fourier Transform Infrared Spectroscopy
Processing
Electron microscopy
Optical microscopy
Fourier transform infrared spectroscopy
Electron Microscopy
Flow rate
Temperature
Fibers
Electric potential

Keywords

  • Electrohydrodynamic atomization
  • Hollow spheres
  • Perfluorocarbon

Cite this

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title = "Controlling the thickness of hollow polymeric microspheres prepared by electrohydrodynamic atomization",
abstract = "In this study, the ability to control the shell thickness of hollow polymeric microspheres prepared using electrohydrodynamic processing at ambient temperature was investigated. Polymethylsilsesquioxane (PMSQ) was used as a model material for the microsphere shell encapsulating a core of liquid perfluorohexane (PFH). The microspheres were characterized by Fourier transform infrared spectroscopy and optical and electron microscopy, and the effects of the processing parameters (flow-rate ratio, polymer concentration and applied voltage) on the mean microsphere diameter (D) and shell thickness (t) were determined. It was found that the mean diameters of the hollow microspheres could be controlled in the range from 310 to 1000 nm while the corresponding mean shell thickness varied from 40 to 95 nm. The results indicate that the ratio D : t varied with polymer concentration, with the largest value of approximately 10 achieved with a solution containing 18 wt{\%} of the polymer, while the smallest value (6.6) was obtained at 36 wt{\%}. For polymer concentrations above 63 wt{\%}, hollow microspheres could not be generated, but instead PMSQ fibres encapsulating PFH liquid were obtained.",
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Controlling the thickness of hollow polymeric microspheres prepared by electrohydrodynamic atomization. / Chang, Ming Wei; Stride, Eleanor; Edirisinghe, Mohan.

In: Journal of The Royal Society Interface, Vol. 7, No. SUPPL. 4, 06.08.2010.

Research output: Contribution to journalArticle

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