Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.21/3652
Título: First Curl, Then Wrinkle
Autor: Trindade, Ana C.
Canejo, João P.
Teixeira, Paulo Ivo Cortez
Patrício, Pedro
Godinho, Maria H.
Palavras-chave: Elastic instabilities
Janus fibres
Data: 19-Ago-2013
Editora: Wiley-VCH Verlag
Citação: TRINDADE, Ana C.; CANEJO, João P.; TEIXEIRA, Paulo I. C.; PATRÍCIO, Pedro; GODINHO, Maria H. - First Curl, Then Wrinkle. Macromolecular Rapid Communications. ISSN 1521-3927. Vol. 34, nr. 20 (2013), p.1618-1622.
Resumo: The excellent properties of elastomers are exploited to trigger wrinkling instabilities in curved shells. Micro- and nano-fibres are produced by electrospinning and UV irradiated: each fibre consists of a soft core and a stiff outer half-shell. Upon solvent de-swelling, the fibres curl because the shell and the core have different natural lengths. Wrinkling only starts after the fibre has attained a well-defined helical shape. A simple analytical model is proposed to find the curling curvature and wrinkle wavelength, as well as the transition between the “curling” and “wrinkling” regimes. This new instability resembles that found in the tendrils of climbing plants as they dry and lignify.
Peer review: yes
URI: http://hdl.handle.net/10400.21/3652
ISSN: 1521-3927
Versão do Editor: http://onlinelibrary.wiley.com/doi/10.1002/marc.201300436/abstract
Aparece nas colecções:ISEL - Física - Artigos

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