Self-healing supramolecular polyurethane coatings: preliminary study of the corrosion protective properties
| Autor: | E. Scrinzi, Flavio Deflorian, Stefano Rossi |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
chemistry.chemical_classification
Materials science Hydrogen bond General Chemical Engineering Supramolecular chemistry General Chemistry engineering.material Dielectric spectroscopy Corrosion Supramolecular polymers chemistry.chemical_compound chemistry Coating Covalent bond engineering General Materials Science Composite material Polyurethane |
| Zdroj: | Corrosion Engineering, Science and Technology. 48:147-154 |
| ISSN: | 1743-2782 1478-422X |
| DOI: | 10.1179/1743278212y.0000000062 |
| Popis: | This paper consists of an investigation of the protective properties of a new polyurethane coating (supramolecular polymers) based on hydrogen bonding. It means that the covalent bonds are partially substituted with hydrogen bonds, which are able to induce self-healing properties in the coating after thermal treatment. The idea is to evaluate if the self-healing ability can restore the barrier properties, and therefore the protective properties, in the case of damaged (scratched) coatings for corrosion protection. The corrosion protection properties characterisation has been carried out using electrochemical impedance spectroscopy measurements. The barrier properties are strictly related to the covalent bonds networks in this class of materials, at least for percentages of hydrogen bonds replacement until to 25%. Some partial recovery after artificial defect has been demonstrated, even it is not sufficient at the moment, and with quite large defect, to completely recover the protective properties.... |
| Databáze: | OpenAIRE |
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