[article]
| Titre : |
Carbon nanotube-based coatings : New coatings containing CNTs offer enhanced strength and corrosion resistance |
| Type de document : |
texte imprimé |
| Auteurs : |
Charlie Simpson, Auteur |
| Année de publication : |
2013 |
| Article en page(s) : |
p. 33-35 |
| Langues : |
Américain (ame) |
| Catégories : |
Acier L'acier est un alliage métallique utilisé dans les domaines de la construction métallique et de la construction mécanique.
L'acier est constitué d'au moins deux éléments, le fer, très majoritaire, et le carbone, dans des proportions comprises entre 0,02 % et 2 % en masse1.
C'est essentiellement la teneur en carbone qui confère à l'alliage les propriétés du métal qu'on appelle "acier". Il existe d’autres métaux à base de fer qui ne sont pas des aciers comme les fontes et les ferronickels par exemple.
Anticorrosion
Epoxydes
Liants
Métaux -- Revêtements protecteurs
Nanotubes
Primaire (revêtement)
Zinc
|
| Index. décimale : |
668.3 Adhésifs et produits semblables |
| Résumé : |
Carbon nanotubes (CNTs) are nanometer-scale tubular structures consisting entirely of carbon atoms (see Figure 1). They represent a newly discovered elemental form of carbon and have remarkable properties in terms of mechanical strength, thermal conductance and electrical conductivity. CNTs are the strongest materials ever discovered, with tensile strengths reported to be 50 times that of steel. They can also have conductivities 1,000 times that of copper.
Since their discovery, CNTs have been an intense focus area in nanotechnology research. Advancements in synthesis technologies have now allowed for the large-scale production of CNTs such that these materials are finding their way into commercial product applications.
CNTs are available in a variety of forms, including single-walled nanotubes (SWNTs) and multi-walled nanotubes (MWNTs). In addition, MWNTs can be produced having a "Russian doll" structure consisting of individual tubes within tubes, or having a "parchment" structure consisting of a continuous, multi-rolled sheet of carbon. CNTs can also come in a variety of chiralities based on how the sheet of carbon atoms are connected together (including so-called "zig-zag" and "armchair" configurations), as well as in a range of different sizes, with typical diameters of 1-3 nm and lengths that approach several microns (with aspect ratios exceeding 1,000x).
Different types of CNTs can exhibit large differences in terms of strength, conductivity and other properties. Commercially available CNTs normally consist of complex mixtures of tube types and sizes, thus making proper CNT selection a critical requirement for successful results in a given application. |
| Note de contenu : |
- Use of carbon nanotubes in corrosion-control coatings
- Field testing of CNT/epoxy zinc-rich coatings
- A technology platform for advanced coatings |
| En ligne : |
http://www.adhesivesmag.com/articles/91920-carbon-nanotube-based-coatings |
| Format de la ressource électronique : |
Web |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18595 |
in ADHESIVES & SEALANTS INDUSTRY (ASI) > Vol. 20, N° 5 (05/2013) . - p. 33-35
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Carbon nanotube-based coatings in ADHESIVES & SEALANTS INDUSTRY (ASI), Vol. 20, N° 5 (05/2013)
