Instytut Podstawowych Problemów Techniki
Polskiej Akademii Nauk

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Daniel P. Ura

AGH University of Science and Technology (PL)

Ostatnie publikacje
1.  Ura D.P., Rosell-Llompart J., Zaszczyńska A., Vasilyev G., Gradys A., Szewczyk P.K., Knapczyk-Korczak J., Avrahami R., Šišková A.O., Arinstein A., Sajkiewicz P., Zussman E., Stachewicz U., The role of electrical polarity in electrospinning and on the mechanical and structural properties of as-spun fibers, Materials, ISSN: 1996-1944, DOI: 10.3390/ma13184169, Vol.13, No.18, pp.4169-1-18, 2020

Streszczenie:
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.

Słowa kluczowe:
fibers, electrical polarity, charges, electrospinning, PMMA, mechanical properties

Afiliacje autorów:
Ura D.P. - AGH University of Science and Technology (PL)
Rosell-Llompart J. - inna afiliacja
Zaszczyńska A. - IPPT PAN
Vasilyev G. - Technion - Israel Institute of Technology (IL)
Gradys A. - IPPT PAN
Szewczyk P.K. - inna afiliacja
Knapczyk-Korczak J. - inna afiliacja
Avrahami R. - inna afiliacja
Šišková A.O. - inna afiliacja
Arinstein A. - Technion - Israel Institute of Technology (IL)
Sajkiewicz P. - IPPT PAN
Zussman E. - Technion - Israel Institute of Technology (IL)
Stachewicz U. - AGH University of Science and Technology (PL)
140p.

Abstrakty konferencyjne
1.  Ura D.P., Gradys A., Zaszczyńska A., Sajkiewicz P., Stachewicz U., Controlling of mechanical properties of electrospun PMMA fibers via voltage polarity, 7th Dresden Nanoanalysis Symposium: Nano-scale characterization for cutting-edge materials research and sustainable materials development, 2019-08-30/08-30, Dresden (DE), pp.1-2, 2019
2.  Ura D.P., Gradys A., Zaszczyńska A., Sajkiewicz P., Stachewicz U., Controlling of mechanical properties of electrospun PMMA fibers via voltage polarity, 8th International PhD Meeting, 2019-08-28/08-29, Dresden (DE), pp.1, 2019
3.  Ura P.D., Zaszczyńska A., Gradys A., Sajkiewicz P., Stachewicz U., Mechanical properties of electrospun non-woven PMMA mats produced with positive and negative voltage polarities, AMT 2019, XXII Physical Metallurgy and Materials Science Conference: Advanced Materials and Technologies, 2019-06-09/06-12, Bukowina Tatrzańska (PL), pp.1, 2019
4.  Ura D.P., Gradys A., Zaszczyńska A., Sajkiewicz P., Stachewicz U., Effect of voltage polarity on mechanical properties of electrospun PMMA fibers, Frontiers in Polymer Science, 2019-05-05/05-08, Budapest (HU), pp.1-2, 2019

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