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

Griffiths, Pablo; Coativy, Gildas; Dalmas, Florent; Falco, Guillaume; Jiang, Liuyin; Xiang, Ziyin; Le, Minh‐Quyen; Ducharne, Benjamin; Roy, Damien; Méchin, Françoise; Bernard, Julien; Meille, Sylvain; Baeza, Guilhem P.

doi:10.1021/acs.macromol.1c02046

Cited by 11 publications

(63 citation statements)

References 40 publications

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“…Note that the supernatant in Figure A exhibits a pale pink color, probably coming from a low concentration of the smallest NPs (ca. 20 nm in diameter), well-stabilized by their interactions with the polymer.…”

Section: Resultsmentioning

confidence: 99%

“…Other attempts were performed on a similar material loaded with Fe 3 O 4 NPs, but there again, the micrograph quality did not really allow us to properly characterize the particle dispersion . In addition, the use of SAXS does not provide much information here because of the high polydispersity of the Fe NPs we used; we refer the interested reader to our previous work where these measurements are provided as Supporting Information. In the same article, identical Fe NPs were used to reinforce a TPU matrix (observable with SEM and TEM) where some degree of aggregation was observed.…”

Section: Resultsmentioning

confidence: 99%

“…While we have used induction heating recently with the aim to stimulate the healing of thermoplastic elastomers for engineering applications, we here combine it with thermal imaging to probe the properties of our supramolecular networks. In Figure , we report the evolution of the temperature as a function of time for three PnBA–TPy(0.5) nanocomposites loaded with 1, 3, and 5 vol % of Fe NPs.…”

Section: Resultsmentioning

confidence: 99%

“…0.3 mm thick) were heated and their temperature variations, recorded contemporaneously with a PI 450 infrared camera (Optris, Germany) equipped with a 13° lens characterized with an optical resolution of 382 × 288 pixels and a measurement rate of 27 Hz. A schematic representation of the whole disposition is presented in ref .…”

Section: Methodsmentioning

confidence: 99%

“…Beyond, even more advanced versions of attractive nanocomposites have been proposed. For example, iron or iron oxide NPs were used to thermally trigger the desorption of polymer chains (resulting in corresponding macroscopic flow) upon the application of an external oscillatory magnetic field. , Although all these “NP-crosslinked” materials are not necessarily expected to be endowed with rapid self-healing (i.e., spontaneous-healing) ability because of their long terminal relaxation time, their enhanced properties combined with possible stimulus-induced healing open perspectives for the development of many applications in the future.…”

Section: Introductionmentioning

confidence: 99%

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Magneto-Responsive Nanocomposites with a Metal–Ligand Supramolecular Matrix

et al. 2022

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Magneto-responsive nanocomposites are prepared by mixing 1−5 vol % of Fe nanoparticles (NPs) in a metallo-supramolecular network made of poly(n-butyl acrylate) (PnBA) bearing terpyridine side groups and cross-linked by the addition of different amounts of Zn 2+ ions. To have a clear understanding of the stepwise increase of complexity, the thermomechanical behavior of these materials was characterized through shear linear rheology at each step of their preparation. The metallo-supramolecular networks reveal a clear transition from polymer-to network-driven dynamics when passing progressively from low (<0 °C) to high temperature. While terpyridine (TPy)−Zn 2+ complexes are usually treated as independent "stickers", the analysis of our master curves strongly suggests their aggregation. After the addition of 1−5 vol % of Fe nanoparticles within the supramolecular networks, we evidence the presence of TPy−NP bonds, resulting in a hybrid network of much longer relaxation time. Lastly, we combine thermal imaging and induction heating to emphasize the signature of sticker dissociation, offering new technical solutions to deepen our fundamental understanding of supramolecular networks.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Magneto-Responsive Nanocomposites with a Metal–Ligand Supramolecular Matrix

et al. 2022

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Responsive materials based on coordination bonds

Chen,

Zhao,

et al. 2023

Responsive Materials

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Responsive materials can respond to different external stimuli by changing their chemical or/and physical properties, thus being useful for various applications such as drug delivery, bioimaging, actuators, and sensors. A common strategy for constructing responsive materials is to introduce dynamic covalent bonds or noncovalent interactions into polymer systems. Compared with noncovalent interactions and other covalent bonds, coordination bonds have the peculiarity that their bond strength and dissociation rate can be tuned to a greater extent. Such tunability makes coordination bonds uniquely advantageous in constructing stimuli‐responsive materials. Herein, we summarize the recent progress of responsive materials based on coordination bonds that are classified into seven categories, that is, thermo‐responsive, photo‐responsive, electro‐responsive, mechano‐responsive, chemo‐responsive, pH‐responsive, and other responsive materials, according to the type of external stimuli. The corresponding mechanism, design strategy, and research status of each category are comprehensively summarized. Finally, the prospects and challenges for the development of stimuli‐responsive materials based on coordination bonds are discussed.

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