Structural and thermal properties of silk fibroin films obtained from cocoon and waste silk fibers as raw materials

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    33 Citas (Scopus)

    Resumen

    This study compares the structural and thermal properties of silk fibroin (SF) films obtained from different raw materials: silk coccons (SC) and silk fibrous wastes (SW). Samples were processed by solution casting (SFC and SFW), and casting with a subsequent water annealing treatment (WA-SFC and WA-SFW). The presence of crystalline (silk I and silk II) and amorphous structures was evaluated using X-ray diffraction (XRD) and Attenuated Total Reflectance-Fourier Transform Infrared (ATR-FTIR) spectroscopy. Thermal properties of SF films were studied by DSC measurements. Accordingly, to FTIR and XRD results, the presence of silk I structure is greater in SFW that in SFC. Differences in enthalpy of crystallization peaks in DSC curves reveals that SFC presents a higher content of amorphous structures than SFW. The analysis also point that water annealing treatment induces conformational changes in secondary structures of SF films. It can be concluded that the presence of crystalline structures in SF films varies with the raw material and water annealing treatment. This fact represents a progress in the development of processing alternatives to control SF materials structure and properties.

    Idioma originalInglés
    Título de la publicación alojada3rd International Conference on Natural Fibers
    Subtítulo de la publicación alojadaAdvanced Materials for a Greener World, ICNF 2017
    EditoresRaul Fangueiro
    EditorialElsevier Ltd
    Páginas384-388
    Número de páginas5
    ISBN (versión impresa)9781510849884
    DOI
    EstadoPublicada - 2017
    Evento3rd International Conference on Natural Fibers: Advanced Materials for a Greener World, ICNF 2017 - Braga, Portugal
    Duración: 21 jun. 201723 jun. 2017

    Serie de la publicación

    NombreProcedia Engineering
    Volumen200
    ISSN (versión digital)1877-7058

    Conferencia

    Conferencia3rd International Conference on Natural Fibers: Advanced Materials for a Greener World, ICNF 2017
    País/TerritorioPortugal
    CiudadBraga
    Período21/06/1723/06/17

    Nota bibliográfica

    Publisher Copyright:
    © 2017 The Authors. Published by Elsevier Ltd.

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