[article]
| Titre : |
Graphene in coatings : overcoming the challenges to reap the benefits |
| Type de document : |
texte imprimé |
| Année de publication : |
2020 |
| Article en page(s) : |
p. 14-16 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Graphène Le graphène est un cristal bidimensionnel (monoplan) de carbone dont l'empilement constitue le graphite. Il a été isolé en 2004 par Andre Geim, du département de physique de l'université de Manchester, qui a reçu pour cette découverte le prix Nobel de physique en 2010 avec Konstantin Novoselov. Il peut être produit de deux manières : par extraction mécanique du graphite (graphène exfolié) dont la technique a été mise au point en 2004, ou par chauffage d'un cristal de carbure de silicium, qui permet la libération des atomes de silicium (graphène epitaxié). Record en conduction thermique jusqu'à 5300 W.m-1.K-1. C'est aussi un matériaux conducteur.
Revêtements
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
Although graphene comprises a one-atom-thick layer of carbon atoms in its ultimate form to nanoplatelets with multiple morphologies, the arrangement of the carbon atoms in that layered material imparts incredible strength as well as the ability to efficiently conduct heat and electricity in a transparent system with unique optical properties. Not surprisingly, interest in graphene has been high since its discovery in 2004, and significant progress has been made in developing commercially viable production methods and applications. According to a June Graphene Commercialization Update by The Graphene Council,1 over 2,300 graphene-related patents have been granted, mostly to companies and academic institutions, and graphene is predicted to impact more than 45 industry sectors and applications, with the top areas including energy storage, semiconductors, composites/plastics/polymers, advanced materials, metals, chemicals, display electronics, bulk manufacturing, sensors, and healthcare. Notably, the graphene market is maturing, with mainstream companies becoming increasingly involved and a greater percentage of patents relating to higher-value applications rather than graphene production. Several companies are now able to produce up to tons of graphene with batch-to-batch repeatability, with chemical vapor deposition allowing larger formats and quantities at lower prices. Sourcing of raw materials has expanded from graphite mining to include by-products of bio-diesel production and other organic sources such as hemp. Concerns about the safety of graphene are also being addressed, enabling wider adoption of this unusual material. |
| En ligne : |
https://drive.google.com/file/d/1LiKJtj-BMdbcg6AQwNcK-hJoQ7CzyHly/view?usp=share [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34724 |
in COATINGS TECH > Vol. 17, N° 10 (10/2020) . - p. 14-16
[article]
|
Aller sur edunet
Accueil
Graphene in coatings : overcoming the challenges to reap the benefits in COATINGS TECH, Vol. 17, N° 10 (10/2020)
