Carbon nanotubes

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Several types of carbon

Synthesis

Properties

Applications

Applications

Applications for carbon nanotubes are many. The outstanding properties listed above open up many prospects:
The most direct application under study consists in using carbon nanotubes as an additive for thermoplastic, thermoset and elastomer polymers. Just as carbon black is used in industry to make polymers conductive, the specific properties of carbon nanotubes can be transferred into the matrices, as long as the additive is properly dispersed in the composite.

It is possible to impart very specific properties to nanotubes (thermal and electrical conductivity, greater mechanical strength, adsorption), or even multifunctionality:
The addition of NTCs into a polymer for example helps achieve good electrical conductivity, and as a result eliminate electrostatic discharges, while maintaining and improving the polymer’s mechanical properties (light weight, elasticity, strength, etc.). This makes it possible therefore to create conductive polymers for applications in motorcars, electronic components, defense, medicine, etc. Compared with traditional additives such as carbon black, smaller quantities yield the same electrical properties.

Transmission electron microscopy photograph of
 Multi Wall Nanotubes

Many other applications are being developed:

• Carbon nanotubes feature outstanding qualities in catalysis. Their chemical inertia, high-temperature stability under inert atmosphere, and porosity are due to their carbon nature. Apart from these properties not unlike those of activated carbon, carbon nanotubes boast a large external surface area and a strong interaction between metal and support.

BMC bicycle frame made of nanotube-reinforced resin,
2005 Tour de France. ARKEMA belongs to the network of partners.

The absence of microporosity enables fast access to the sites. Carbon nanotubes allow increased activity and superior selectivity. Finally, their outstanding mechanical properties no longer limit the lifetime of the catalyst.
This concerns hydrogenation, selective oxidization, hydro-desulfurization, etc.

• In the energy sector, carbon nanotubes could be used in the development of electrodes, the storage of energy, etc.

A great many applications are under study and remain confidential.