Advanced Materials

Helical Twisting of Electrospun Liquid Crystalline Cellulose Micro- and Nanofibers

Authors

  • João P. Canejo,

    1. Departamento de Ciência dos Materiais and CENIMAT/I3N Universidade Nova de Lisboa, Caparica 2829-516 Caparica (Portugal)
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  • João P. Borges,

    1. Departamento de Ciência dos Materiais and CENIMAT/I3N Universidade Nova de Lisboa, Caparica 2829-516 Caparica (Portugal)
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  • M. Helena Godinho,

    Corresponding author
    1. Departamento de Ciência dos Materiais and CENIMAT/I3N Universidade Nova de Lisboa, Caparica 2829-516 Caparica (Portugal)
    • Departamento de Ciência dos Materiais and CENIMAT/I3N Universidade Nova de Lisboa, Caparica 2829-516 Caparica (Portugal).
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  • Pedro Brogueira,

    1. Departamento de Física, Instituto Superior Técnico Avenida Rovisco Pais, 1049-001 Lisboa (Portugal)
    2. Instituto de Ciência e Engenharia de Materiais e Superfícies, Instituto Superior Técnico Avenida Rovisco Pais, P-1049-001 Lisboa (Portugal)
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  • Paulo I. C. Teixeira,

    Corresponding author
    1. Instituto Superior de Engenharia de Lisboa Rua Conselheiro Emídio Navarro, 1950-062 Lisboa (Portugal)
    2. Centro de Física Teórica e Computacional, Universidade de Lisboa Avenida Professor Gama Pinto 2, 1649-003 Lisboa (Portugal)
    • Instituto Superior de Engenharia de Lisboa Rua Conselheiro Emídio Navarro, 1950-062 Lisboa (Portugal).
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  • Eugene M. Terentjev

    1. Cavendish Laboratory, University of Cambridge J. J. Thomson Avenue, Cambridge CB3 OHE (UK)
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  • This work was supported by the Portuguese Science Foundation (FCT) through Projects POCI/CTM/56382/2004 and POCTI/CTM/38330/2001, and through Pluriannual contracts with CENIMAT/I3N and ICEMS; and by the GRICES/Treaty of Windsor Programme through grant no. B-20/08. J. P. Canejo gratefully acknowledges FCT for grant SFRH/BD/37958/2007.

Abstract

Helically twisted fibers can be produced by electrospinning liquid-crystalline cellulose solutions. Fiber topographies are studied by atomic force microscopy, scanning electron microscopy (see figure) and polarized optical microscopy. The fibers have a nearly universal pitch-to-diameter ratio and comprise both right- and left-handed helices.

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