Small polymeric ducts incorporating a ribbon-shaped mat of densely packed magnetic nanofibers have been manufactured via electrospinning by using a cylindrical manifold, alternately under rotation or static. The magnetic nanofibers mat is located on the side of the tube and aligned to the longitudinal axis using the assistance of a magnetic field. The designed methodology ensures that the magnetic particles are completely wrapped into a protective polymer shell. Experimental results demonstrate that the innovative confinement of magnetic nanofibers, forming a longitudinal ribbon on a tube side, confers a high and reversible transverse strain under a moderate magnetic field stimulus: a magnetic field gradient ≤30 mT/mm, at a basic field intensity <0.04 T, induces a 40% decrement of the duct radius aligned with the magnetic force axis. In perspective, this is very attractive to fabricate magneto-active ducts suitable for microfluidic components, as well as biomedical devices to be applied in surgery and endoscopy.

Nanocomposite tubes for magneto-active devices / Guarino, V.; Iannotti, V.; Ausanio, G.; Ambrosio, L.; Lanotte, L.. - In: EXPRESS POLYMER LETTERS. - ISSN 1788-618X. - 14:7(2020), pp. 651-662. [10.3144/expresspolymlett.2020.53]

Nanocomposite tubes for magneto-active devices

Iannotti V.;Ausanio G.;Lanotte L.
2020

Abstract

Small polymeric ducts incorporating a ribbon-shaped mat of densely packed magnetic nanofibers have been manufactured via electrospinning by using a cylindrical manifold, alternately under rotation or static. The magnetic nanofibers mat is located on the side of the tube and aligned to the longitudinal axis using the assistance of a magnetic field. The designed methodology ensures that the magnetic particles are completely wrapped into a protective polymer shell. Experimental results demonstrate that the innovative confinement of magnetic nanofibers, forming a longitudinal ribbon on a tube side, confers a high and reversible transverse strain under a moderate magnetic field stimulus: a magnetic field gradient ≤30 mT/mm, at a basic field intensity <0.04 T, induces a 40% decrement of the duct radius aligned with the magnetic force axis. In perspective, this is very attractive to fabricate magneto-active ducts suitable for microfluidic components, as well as biomedical devices to be applied in surgery and endoscopy.
2020
Nanocomposite tubes for magneto-active devices / Guarino, V.; Iannotti, V.; Ausanio, G.; Ambrosio, L.; Lanotte, L.. - In: EXPRESS POLYMER LETTERS. - ISSN 1788-618X. - 14:7(2020), pp. 651-662. [10.3144/expresspolymlett.2020.53]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11588/832447
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