Ceramic encapsulation with polymer via co-axial electrohydrodynamic jetting

M. Nangrejo, Zeeshan Ahmad, M. Edirisinghe

Research output: Contribution to journalArticlepeer-review


Co-flowing media of a polymeric solution (30 wt% polymethylsilsesquioxane in ethanol) and a ceramic suspension (10 wt% alumina in glycerol) were subjected to an electric field. The flow rates of the media (10-30 microL min(-1)) and the applied voltage (0-11 kV) were varied systematically during the experimentation by making gradual increments to each variable, which enabled the construction of a mode selection map. Under co-flowing conditions, with the flow rate of polymer solution (outer needle) twice that of the ceramic suspension (inner needle), encapsulated droplets of polymer-coated alumina were produced within stable cone-jet mode. These were collected in a thin film of water and the resultant particle size varied between 1 and 38 microm. Encapsulation was confirmed with scanning electron microscopy and element analysis.
Original languageEnglish
Pages (from-to)542-551
Number of pages10
JournalJournal of Microencapsulation
Issue number6
Publication statusPublished - 2010


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