Reversible self-healing carbon-based nanocomposites for structural applications
Liberata Guadagno,Luigi Vertuccio,Carlo Naddeo,Elisa Calabrese,Giuseppina Barra,Marialuigia Raimondo,Andrea Sorrentino,Wolfgang H. Binder,Philipp Michael,Sravendra Rana +9 more
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TLDR
Curing degrees, glass transition temperatures, and storage moduli of the formulated multifunctional nanocomposites prove their potential for application as functional structural materials.Abstract:
Reversible Hydrogen Bonds (RHB) have been explored to confer self-healing function to multifunctional nanocomposites. This study has been carried out through a sequence of different steps. Hydrogen bonding moieties, with the intrinsic ability to simultaneously perform the functions of both hydrogen donors and acceptors, have been covalently attached to the walls of carbon nanotubes. The epoxy matrix has been modified to adapt the formulation for hosting self-healing mechanisms. It has been toughened with different percentages of rubber phase covalently linked to the epoxy precursor. The most performant matrix, from the mechanical point of view, has been chosen for the incorporation of MWCNTs. Self-healing performance and electrical conductivities have been studied. The comparison of data related to the properties of nanocomposites containing incorporated functionalized and nonfunctionalized MWCNTs has been performed. The values of the electrical conductivity of the self-healing nanocomposites, containing 2.0% by weight of functionalized multiwalled carbon nanotubes (MWCNTs), range between 6.76 × 10−3 S/m and 3.77 × 10−2 S/m, depending on the nature of the functional group. Curing degrees, glass transition temperatures, and storage moduli of the formulated multifunctional nanocomposites prove their potential for application as functional structural materials.read more
Citations
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A perspective approach on the amine reactivity and the hydrogen bonds effect on epoxy-amine systems
TL;DR: In this article, an amine reactivity scale for epoxy-amine system is described and all external factors influencing the hydrogen bond formation are described based on several studies, and the influence of hydrogen bond in epoxyamine system was summarized.
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Progress and challenges in self-healing composite materials
TL;DR: In this paper, the authors summarized the latest progress in the design and fabrication techniques of self-healing materials through a wide range of materials, including metals, ceramics, concrete, and polymer composites.
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Plasmonic photothermal release of docetaxel by gold nanoparticles incorporated onto halloysite nanotubes with conjugated 2D8-E3 antibodies for selective cancer therapy.
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Design and fabrication of mechanically strong and self-healing rubbers via metal-ligand coordination bonds as dynamic crosslinks
TL;DR: Li et al. as mentioned in this paper constructed dynamic Fe3+-pyridine coordination bonds in commercially available epoxidized natural rubber (ENR), and the reversible nature of the coordination bonds endows the rubbers with efficient selfhealing behavior under moderate conditions.
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Carbon nanotubes and expanded graphite based bulk nanocomposites for de-icing applications
Luigi Vertuccio,Fabiana Foglia,Roberto Pantani,M.D. Romero-Sánchez,B. Calderón,Liberata Guadagno +5 more
TL;DR: In this article, the authors evaluated the effectiveness of the Joule effect for the same resin, characterized by low values of viscosity, containing incorporated carbon nanotubes and two different grades of expanded graphite and found that the nanocomposite containing incorporated the unidimensional filler reaches higher temperatures for lower values of the applied voltage.
References
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Self-healing materials with microvascular networks
TL;DR: A self-healing system capable of autonomously repairing repeated damage events via a three-dimensional microvascular network embedded in the substrate is reported, opening new avenues for continuous delivery of healing agents for self-repair as well as other active species for additional functionality.
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Self-healing structural composite materials
TL;DR: In this paper, a self-healing fiber-reinforced structural polymer matrix composite material is demonstrated, where a microencapsulated healing agent and a solid chemical catalyst are dispersed within the polymer matrix phase.