Characterization of structural, mechanical and nano-mechanical properties of electrospun PGS/PCL fibers

S. Salehi; T. Bahners; J. S. Gutmann; S.-L. Gao; E. Mäder; T. A. Fuchsluger

doi:10.1039/C4RA01237B

Characterization of structural, mechanical and nano-mechanical properties of electrospun PGS/PCL fibers

S. Salehi,*^abc T. Bahners,^a J. S. Gutmann,^ad S.-L. Gao,^e E. Mäder^e and T. A. Fuchsluger^b

* Corresponding authors

^a Deutsches Textilforschungszentrum Nord-West gGmbH, Adlerstr. 1, 47798 Krefeld, Germany
E-mail: salehi@ma.iut.ac.ir, salehi@dtnw.de
Fax: +49 203 379-8253
Tel: +49 203 379-8211

^b Augenklinik, Universitätsklinikum Düsseldorf, Heinrich-Heine-Universität, 40225 Düsseldorf, Germany

^c Biomaterials Research Group, Department of Materials Engineering, Isfahan University of Technology, 8415683111 Isfahan, Iran

^d Physikalische Chemie, Universität Duisburg-Essen, Universitätsstr. 5, 45141 Essen, Germany

^e Leibniz Institut für Polymerforschung e.V., D-01069 Dresden, Germany

Abstract

Physical and mechanical studies of aligned nanofibers of poly (glycerol sebacate) (PGS)/poly (ε-caprolactone) (PCL) designed for application in cornea tissue engineering are investigated. The fibers were fabricated by electrospinning different weight ratios of PGS and PCL (1 : 1, 2 : 1, 3 : 1, and 4 : 1), and had diameters in the range of 300–550 nm. DSC and XRD measurements showed that the overall crystallinity decreased with increasing amount of amorphous PGS in the composition. Accordingly, the elastic modulus of the fibers was found to decrease with increasing PGS/PCL blend ratio. In contrast, the surface modulus of the nanofibers, measured by nanoindentation, exceeded the elastic modulus by two orders of magnitude and increased with weight ratio of PGS. It is assumed that this is caused by the increasing content of PGS forcing the fiber-forming PCL into confined and cross-linked domains near the fiber surface.

Article information

https://doi.org/10.1039/C4RA01237B

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Paper

Submitted

12 Feb 2014

Accepted

28 Mar 2014

First published

28 Mar 2014

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RSC Adv., 2014,4, 16951-16957

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Characterization of structural, mechanical and nano-mechanical properties of electrospun PGS/PCL fibers

S. Salehi, T. Bahners, J. S. Gutmann, S.-L. Gao, E. Mäder and T. A. Fuchsluger, RSC Adv., 2014, 4, 16951 DOI: 10.1039/C4RA01237B

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Characterization of structural, mechanical and nano-mechanical properties of electrospun PGS/PCL fibers

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