Author, as appears in the article.: Ura DP; Rosell-Llompart J; Zaszczyńska A; Vasilyev G; Gradys A; Szewczyk PK; Knapczyk-Korczak J; Avrahami R; Šišková AO; Arinstein A; Sajkiewicz P; Zussman E; Stachewicz U

Department: Enginyeria Química

URV's Author/s: Rosell Llompart, Joan

Keywords: Surface Stability Polymer nanofibers Poly(methyl methacrylate) Pmma Parameters Orientation Morphology Mechanical properties Mats Jet Fibers Electrospinning Electrical polarity Charges pmma fibers electrospinning electrical polarity charges

Abstract: © 2020 by the authors. 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, LE ~ Ẽ0.55. 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, LE 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.

Thematic Areas: Química Odontología Medicina veterinaria Medicina i Materials science, multidisciplinary Materiais Interdisciplinar General materials science Engenharias iv Engenharias iii Engenharias ii Engenharias i Condensed matter physics Ciências biológicas ii Ciências biológicas i Ciências agrárias i Ciência de alimentos Ciência da computação Biotecnología Astronomia / física Arquitetura, urbanismo e design

licence for use: https://creativecommons.org/licenses/by/3.0/es/

ISSN: 19961944

Author's mail: joan.rosell@urv.cat

Author identifier: 0000-0002-5288-9150

Record's date: 2023-02-26

Papper version: info:eu-repo/semantics/publishedVersion

Link to the original source: https://www.mdpi.com/1996-1944/13/18/4169

Licence document URL: http://repositori.urv.cat/ca/proteccio-de-dades/

Papper original source: Materials. 13 (18):

APA: Ura DP; Rosell-Llompart J; Zaszczyńska A; Vasilyev G; Gradys A; Szewczyk PK; Knapczyk-Korczak J; Avrahami R; Šišková AO; Arinstein A; Sajkiewicz P; Zu (2020). The role of electrical polarity in electrospinning and on the mechanical and structural properties of as-spun fibers. Materials, 13(18), -. DOI: 10.3390/ma13184169

Article's DOI: 10.3390/ma13184169

Entity: Universitat Rovira i Virgili

Journal publication year: 2020

Publication Type: Journal Publications