Study of the electrostatic jet initiation in near-field electrospinning
| العنوان: | Study of the electrostatic jet initiation in near-field electrospinning |
|---|---|
| المؤلفون: | Manuel Gamero-Castaño, Sunshine Holmberg, Marc J. Madou, Albert Cisquella-Serra, Álvaro Gual-Mosegui, Marco Magnani |
| المصدر: | Journal of Colloid and Interface Science. 543:106-113 |
| بيانات النشر: | Elsevier BV, 2019. |
| سنة النشر: | 2019 |
| مصطلحات موضوعية: | Jet (fluid), Materials science, Astrophysics::High Energy Astrophysical Phenomena, Near and far field, 02 engineering and technology, Mechanics, Conical surface, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, Electrospinning, 0104 chemical sciences, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials, Biomaterials, Colloid and Surface Chemistry, Electric field, Meniscus, 0210 nano-technology, Common emitter, Voltage |
| الوصف: | Hypothesis The electrostatic initiation of a jet from the meniscus of a polymeric solution is a key step in near-field electrospinning (NFES), however this process is not sufficiently understood to determine a criterion for the critical emitter voltage triggering the jet, nor to optimize the electrodes. It is expected that the jet initiation in NFES is similar to that in cone-jet electrosprays, and can be described with a first principles model. Experiments The electrostatic jet initiation of an SU-8 polymeric solution is studied with two different electrode geometries to quantify the initiation parameters and illustrate the optimization of the electric field. A first-principles model is developed to predict and analyze the initiation. Findings Two jet emission mechanisms are identified: one in which the jet is ejected from a free-standing conical meniscus; and one resulting from the contact of the meniscus with the collector, as it evolves from a spherical to a conical shape. Both are triggered by a critical emitter potential. The former produces the thinnest jets with a diameter that depends on the properties of the fluid, while the latter is an alternative to existing mechanical initiation methods. The model reproduces well the experimental phenomena including the critical voltage. |
| تدمد: | 0021-9797 |
| DOI: | 10.1016/j.jcis.2019.02.041 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::82e2693d7b7a07a53da3de604155bbbf https://doi.org/10.1016/j.jcis.2019.02.041 |
| Rights: | CLOSED |
| رقم الانضمام: | edsair.doi.dedup.....82e2693d7b7a07a53da3de604155bbbf |
| قاعدة البيانات: | OpenAIRE |
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