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Core–Shell Electrospun Hollow Aluminum Oxide Ceramic Fibers

Department of Chemical and Biomolecular Engineering, The University of Akron, Akron, OH 44325, USA
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Academic Editor: Stephen C. Bondy
Fibers 2015, 3(4), 450-462;
Received: 20 August 2015 / Accepted: 12 October 2015 / Published: 16 October 2015
PDF [838 KB, uploaded 16 October 2015]


In this work, core–shell electrospinning was employed as a simple method for the fabrication of composite coaxial polymer fibers that became hollow ceramic tubes when calcined at high temperature. The shell polymer solution consisted of polyvinyl pyrollidone (PVP) in ethanol mixed with an aluminum acetate solution to act as a ceramic precursor. The core polymer was recycled polystyrene to act as a sacrificial polymer that burned off during calcination. The resulting fibers were analyzed with X-ray diffraction (XRD) and energy dispersive spectroscopy (EDS) to confirm the presence of gamma-phase aluminum oxide when heated at temperatures above 700 °C. The fiber diameter decreased from 987 ± 19 nm to 382 ± 152 nm after the calcination process due to the polymer material being burned off. The wall thickness of these fibers is estimated to be 100 nm. View Full-Text
Keywords: electrospinning; hollow fibers; Al2O3 electrospinning; hollow fibers; Al2O3

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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MDPI and ACS Style

Rajala, J.W.; Shin, H.U.; Lolla, D.; Chase, G.G. Core–Shell Electrospun Hollow Aluminum Oxide Ceramic Fibers. Fibers 2015, 3, 450-462.

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