Influence of the draw ratio on the tensile and fracture behavior of NMMO regenerated silk fibers |
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| Authors: | Paola Corsini José Perez‐Rigueiro Gustavo V Guinea Gustavo R Plaza Manuel Elices Enrico Marsano Maria M Carnasciali Giuliano Freddi |
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| Institution: | 1. Dipartimento di Chimica e Chimica Industriale, Università di Genova, Via Dodecaneso 31, 16146 Genova, ItalyDipartimento di Chimica e Chimica Industriale, Università di Genova, Via Dodecaneso 31, 16146 Genova, Italy;2. Departamento de Ciencia de Materiales, ETSI Caminos, Canales y Puertos, Avda. de la Complutense s‐n, 28040 Madrid, Spain;3. Dipartimento di Chimica e Chimica Industriale, Università di Genova, Via Dodecaneso 31, 16146 Genova, Italy;4. Stazione Sperimentale per la Seta, Via G.Colombo 83, 20133 Milano, Italy |
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| Abstract: | The tensile properties and fracture surfaces of N‐methylmorpholine‐N‐oxide (NMMO) regenerated silk fibroin fibers produced with a range of draw ratios has been characterized and related to their microstructure with data obtained from Raman spectroscopy and birefringence measurements. The spinning process allows control of two different draw ratios, coagulation, and postspinning, and it has been found that the microstructure and the properties of the fibers can be modified by the proper combination of both draw ratios. NMMO regenerated silk fibroin fibers subjected to postspinning drawing yield tensile properties comparable to other regenerated fibers and strain at breaking comparable to natural Bombyx mori silk fibers. Tensile strength; however, is still significantly lower than that of natural fibers. © 2007 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 45: 2568–2579, 2007 |
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| Keywords: | biomaterials fibers mechanical properties silk wet spinning |
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