Tunneling atomic force microscopy analysis of supramolecular self-responsive nanocomposites
| Autor: | Elisa Calabrese, Sravendra Rana, Liberata Guadagno, Marialuigia Raimondo, Philipp Michael, Wolfgang H. Binder |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Hydrogen bonding
Morphological analysis Materials science Self-healing nanocomposites Polymers and Plastics Functionalized nanofillers Multi-wall carbon nanotubes (MWCNTs) Self-responsive materials Supramolecular interactions Tunneling atomic force microscopy (TUNA) Supramolecular chemistry Organic chemistry Nanotechnology 02 engineering and technology Carbon nanotube 010402 general chemistry 01 natural sciences Article law.invention QD241-441 law chemistry.chemical_classification Nanocomposite Hydrogen bond General Chemistry Polymer Epoxy 021001 nanoscience & nanotechnology Acceptor 0104 chemical sciences chemistry Covalent bond visual_art visual_art.visual_art_medium 0210 nano-technology |
| Zdroj: | Polymers Volume 13 Issue 9 Polymers, Vol 13, Iss 1401, p 1401 (2021) |
| Popis: | A big step forward for composite application in the sector of structural materials is given by the use of Multi-Wall Carbon Nanotubes (MWCNTs) functionalized with hydrogen bonding moieties, such as barbiturate and thymine, to activate self-healing mechanisms and integrate additional functionalities. These materials with multiple healing properties at the same damaged site, imparted by hydrogen bonds, will also have the potential to improve material reliability, extend the service life, reduce replacement costs, and improve product safety. This revolutionary approach is obtained by integrating the non-covalent interactions coupled with the conventional covalent approach used to cross-link the polymer. The objective of this work is to characterize rubber-toughened supramolecular self-healing epoxy formulations based on unfunctionalized and functionalized MWCNTs using Tunneling Atomic Force Microscopy (TUNA). This advanced technique clearly shows the effect produced by the hydrogen bonding moieties acting as reversible healing elements by their simultaneous donor and acceptor character, and covalently linked to MWCNTs to originate self-healing nanocomposites. In particular, TUNA proved to be very effective for the morphology study of both the unfunctionalized and functionalized carbon nanotube-based conductive networks, thus providing useful insights aimed at understanding the influence of the intrinsic nature of the nanocharge on the final properties of the multifunctional composites. |
| Databáze: | OpenAIRE |
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