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Polymer Science Series B

, Volume 52, Issue 9–10, pp 571–574 | Cite as

Preparation of core-shell and hollow fibers using layer by layer (LbL) self-assembly of polyelectrolytes on electrospun submicrometer-scale silica fibers

  • Abbass KazemiEmail author
  • Joerg Lahann
  • Mohammad Madani
  • Naser Sharifi-Sanjani
  • Ahmad Hasan-Kaviar
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Abstract

Herein, fabrication of hollow fibers made of polyelectrolyte multilayers is reported. Silica submicrometer-scale fibers were fabricated by electrospinning and layer by layer deposition of polyelectrolytes were performed to coat silica fibers with polyelectrolyte multilayers, which were prepared by consecutive deposition of poly(ethyleneimine) and poly(styrene sulfonate sodium salt)/sodium dodecyl sulfate onto the surface of the silica fibers. In order to obtain hollow fibers, the core removal was carried out by introducing the core-shell fibers to a hydrofluoric acid solution. The hollow fibers were stable in hydrofluoric acid solution and displayed pH-dependent structural changes. SEM microscopy indicated the formation of the glass fibers and the fibers coated with polyelectrolyte multilayers (Silica—polyelectrolyte multilayers (PEM) fibers). The diameter of the core-shell fibers was increased after layer-by-layer coating. ATR-FTIR was performed for characterization of the glass fibers before and after layer-by-layer coating as well as after selective core removal. IR spectrum of the Silica-PEM fibers indicates C-H stretching modes of saturated hydrocarbons, confirming multilayers formation. Core removal was also confirmed by IR spectroscopy as Si-O-Si band disappears for the IR spectrum of the fibers after core-removal.

Keywords

Polymer Science Series Hollow Fiber Silica Fiber Core Shell Styrene Sulfonate 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Pleiades Publishing, Ltd. 2010

Authors and Affiliations

  • Abbass Kazemi
    • 1
    • 2
    Email author
  • Joerg Lahann
    • 1
  • Mohammad Madani
    • 3
  • Naser Sharifi-Sanjani
    • 3
  • Ahmad Hasan-Kaviar
    • 3
  1. 1.Departments of Chemical Engineering and Materials Science and Engineering, Macromolecular Science and Engineering CenterThe University of MichiganAnn ArborUSA
  2. 2.Division of Polymer Science and TechnologyResearch Institute of Petroleum IndustryTehranIran
  3. 3.School of ChemistryUniversity College of Science, University of TehranTehranIran

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