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Journal Articles Macromolecules Year : 2022

Ultrafast Remote Healing of Magneto-Responsive Thermoplastic Elastomer-Based Nanocomposites

Julien Bernard

Abstract

We describe herein, a general, efficient, and scalable process to design magneto-responsive thermoplastic elastomerbased (nano)composites that can be repeatedly healed in a few tens of seconds by triggering polymer melting upon exposure to a high-frequency magnetic field. Three series of composites loaded with 1−15 vol % of Fe3O4 nanoparticles, Fe nanoparticles, or Fe microparticles were produced and characterized in depth with the aim to identify the physical properties required for two applications: (1) material healing, which we evaluate through the rewelding of precut samples and subsequent tensile tests, and (2) surface smoothening of 3D-printed objects, serving to remove superficial defects and improve their appearance. The optimal formulation consisting of a composite reinforced with 5 vol % of Fe nanoparticles ensures a high ability to heat while keeping a low viscosity in the molten state being ideal for polymer processing.
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Dates and versions

hal-03566840 , version 1 (25-03-2022)

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Pablo Griffiths, Gildas Coativy, Florent Dalmas, Guillaume Falco, Liuyin Jiang, et al.. Ultrafast Remote Healing of Magneto-Responsive Thermoplastic Elastomer-Based Nanocomposites. Macromolecules, 2022, 55 (3), pp.831-843. ⟨10.1021/acs.macromol.1c02046⟩. ⟨hal-03566840⟩
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