| Autor: |
Tkachenko V; Institute of Applied Sciences and Intelligent Systems (ISASI), National Research Council of Italy (CNR), Pozzuoli, NA 80078, Italy., Coppola S; Institute of Applied Sciences and Intelligent Systems (ISASI), National Research Council of Italy (CNR), Pozzuoli, NA 80078, Italy., Vespini V; Institute of Applied Sciences and Intelligent Systems (ISASI), National Research Council of Italy (CNR), Pozzuoli, NA 80078, Italy., Tammaro D; Department of Chemical, Materials and Production Engineering, University of Naples Federico II, Piazzale Tecchio 80, 80125 Naples, Italy., Maffettone PL; Department of Chemical, Materials and Production Engineering, University of Naples Federico II, Piazzale Tecchio 80, 80125 Naples, Italy., Ferraro P; Institute of Applied Sciences and Intelligent Systems (ISASI), National Research Council of Italy (CNR), Pozzuoli, NA 80078, Italy., Grilli S; Institute of Applied Sciences and Intelligent Systems (ISASI), National Research Council of Italy (CNR), Pozzuoli, NA 80078, Italy. |
| Abstrakt: |
The electrohydrodynamic (EHD) jetting of fluids is used for several applications such as inkjet printing, atomization of analyte in mass spectrometry, liquid metal alloy ion sources, and electrospinning of polymer fibers. Historically, the bulk of research has focused on nonviscous, highly conductive fluids which are most suitable for EHD spray and printing, while there is relatively little experimental work on EHD jetting of highly viscous liquid dielectrics. We studied the dynamics of oscillation and pulsating jetting from a suspended drop of polydimethylsiloxane (PDMS) polymers in an electric field, with particular attention to the viscosity dependence of the oscillation period and meniscus elongation and contraction time over a wide viscosity range (10 2 -10 5 cSt). The reported results could help the appropriate design of EHD processes and may open new possibilities for the rheological characterization of liquid polymers using small volumes at the scale of nanoliters. |
