The Role of Electrical Polarity in Electrospinning and on the Mechanical and Structural Properties of As-Spun Fibers

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ID: 266341
2020
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Abstract
Electric field strength and polarity in electrospinning processes and their effect on process dynamics and the physical properties of as-spun fibers is studied. Using a solution of the neutral polymer such as poly(methyl methacrylate) (PMMA) we explored the electrospun jet motion issued from a Taylor cone. We focused on the straight jet section up to the incipient stage of the bending instability and on the radius of the disk of the fibers deposited on the collecting electrode. A new correlation formula using dimensionless parameters was found, characterizing the effect of the electric field on the length of the straight jet, L˜E~E˜0.55. This correlation was found to be valid when the spinneret was either negatively or positively charged and the electrode grounded. The fiber deposition radius was found to be independent of the electric field strength and polarity. When the spinneret was negatively charged, L˜E was longer, the as-spun fibers were wider. The positively charged setup resulted in fibers with enhanced mechanical properties and higher crystallinity. This work demonstrates that often-overlooked electrical polarity and field strength parameters influence the dynamics of fiber electrospinning, which is crucial for designing polymer fiber properties and optimizing their collection.
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ura2020materialsthe Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Daniel P. Ura;Joan Rosell-Llompart;Angelika Zaszczyńska;Gleb Vasilyev;Arkadiusz Gradys;Piotr K. Szewczyk;Joanna Knapczyk-Korczak;Ron Avrahami;Alena O. Šišková;Arkadii Arinstein;Paweł Sajkiewicz;Eyal Zussman;Urszula Stachewicz;Ura, Daniel P.;Rosell-Llompart, Joan;Zaszczyńska, Angelika;Vasilyev, Gleb;Gradys, Arkadiusz;Szewczyk, Piotr K.;Knapczyk-Korczak, Joanna;Avrahami, Ron;Šišková, Alena O.;Arinstein, Arkadii;Sajkiewicz, Paweł;Zussman, Eyal;Stachewicz, Urszula;
Journal Materials (Basel, Switzerland)
Year 2020
DOI
10.3390/ma13184169
URL
https://www.mdpi.com/1996-1944/13/18/4169
Keywords
electrospinning mechanical properties PMMA fibers charges electrical polarity

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