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The effect of solvent dielectric properties on the collection of oriented electrospun fibers

Sun, Zaicheng ; Deitzel, Joseph M. ; Knopf, Jeff ; Chen, Xing ; Gillespie Jr, John W.

Journal of applied polymer science, 2012-08, Vol.125 (4), p.2585-2594 [Periódico revisado por pares]

Hoboken: Wiley Subscription Services, Inc., A Wiley Company

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  • Título:
    The effect of solvent dielectric properties on the collection of oriented electrospun fibers
  • Autor: Sun, Zaicheng ; Deitzel, Joseph M. ; Knopf, Jeff ; Chen, Xing ; Gillespie Jr, John W.
  • Assuntos: Applied sciences ; ceramic nanofibers ; Collection ; Electrospinning ; Exact sciences and technology ; Fibers ; Fibers and threads ; Forms of application and semi-finished materials ; Instability ; Materials science ; Mathematical models ; Nanostructure ; oriented nanofiber ; Polymer industry, paints, wood ; polymer nanofibers ; Polymers ; Solvents ; Stability ; Technology of polymers
  • É parte de: Journal of applied polymer science, 2012-08, Vol.125 (4), p.2585-2594
  • Notas: The views and conclusions contained in this document are those of the authors and should not be interpreted as representing the official policies, either expressed or implied, of the Army Research Laboratory or the U.S. Government. The U.S. Government is authorized to reproduce and distribute reprints for Government purposes notwithstanding any copyright notation here on.
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  • Descrição: A simple approach to electrospinning has been developed that enables the collection of polymer, ceramic, and multiphase composite fibers, in quantity, with a high degree of spatial orientation. It has been demonstrated that a careful choice of solvent effectively eliminates the onset of the characteristic “bending” instability that is commonly associated with the electrospinning process. This allows collection of spatially oriented submicron electrospun fibers on a rotating drum without the need for elaborate mechanical or electrostatic manipulation of the electrospinning jet and/or collection target (Deitzel, J. M.; Kleinmeyer, J. D. et al. Polymer 2001, 42, 8163, Zussman, E.; Theron, A.; et al. Appl Phys Lett 2003, 82, 973, and Li, D. Wang, Y. L.; et al. Nano Lett 2003, 3, 1167). Fibers have been electrospun from a series of model polyethylene oxide/CHCl3 solutions with a range of conductivities. The experimental data confirms theoretical predictions that the onset of the bending instability is a function of the available “free” charge in the solution, which in turn is strongly influenced by the dielectric constant of the solvent. The results show that fiber orientation becomes random as the conductivity increases, indicating the need for the surface charge density to exceed a critical threshold in order for the bending instability to initiate. This method has been experimentally demonstrated with other low‐dielectric constant solvents and other common polymer, ceramic, and composite materials. Furthermore, it has been demonstrated that fibers electrospun from these solutions can be mechanically drawn to submicron dimensions (∼ 200–500 nm) by controlling drum speed. © 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012
  • Editor: Hoboken: Wiley Subscription Services, Inc., A Wiley Company
  • Idioma: Inglês
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