[en] Poly(ε-caprolactone) (PCL) fibers ranging from 250 to 700 nm in diameter were produced by electrospinning a polymer tetrahydrofuran/N,N-dimethylformamide solution. The mechanical properties of the fibrous scaffolds and individual fibers were measured by different methods. The Young’s moduli of the scaffolds were determined using macro-tensile testing equipment, whereas single fibers were mechanically tested using a nanoscale three-point bending method, based on atomic force microscopy and force spectroscopy analyses. The modulus obtained by tensile-testing eight different fiber scaffolds was 3.8 ± 0.8 MPa. Assuming that PCL fibers can be described by the bending model of isotropic materials, a Young’s modulus of 3.7 ± 0.7 GPa was determined for single fibers. The difference of three orders of magnitude observed in the moduli of fiber scaffolds vs. single fibers can be explained by the lacunar and random structure of the scaffolds.
Research Center/Unit :
Center for Education and Research on Macromolecules (CERM)
Disciplines :
Chemistry Materials science & engineering
Author, co-author :
Croisier, Florence ; Université de Liège - ULiège > Department of Chemistry > Center for Education and Research on Macromolecules (CERM)
Duwez, Anne-Sophie ; Université de Liège - ULiège > Department of Chemistry > Nanochemistry and Molecular Systems (NANOCHEM)
Jérôme, Christine ; Université de Liège - ULiège > Department of Chemistry > Center for Education and Research on Macromolecules (CERM)
Léonard, Alexandre ; Université de Liège - ULiège > Department of Applied Chemistry > Laboratory of Chemical Engineering
van der Werf, K. O.; MESA and Institute for NanotechnologyUniversity of Twente, The Netherlands > Department of Science and Technology > Nanobiophysics
Dijkstra, P. J.; Institute for Biomedical Technology, University of Twente, The Netherlands > Department of Science and Technology > Polymer Chemistry and Biomaterials
Bennink, M. L.; MESA and Institute for NanotechnologyUniversity of Twente, The Netherlands > Department of Science and Technology > Nanobiophysics
FRIA - Fonds pour la Formation à la Recherche dans l'Industrie et dans l'Agriculture BELSPO - SPP Politique scientifique - Service Public Fédéral de Programmation Politique scientifique
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