The strength and stiffness of carbon nanofibers are their important physical properties, and the following is some information

Intensity:

Carbon nanotubes are considered to be one of the strongest materials found today, with a theoretical tensile strength of more than 100GPa and a specific strength of up to 62.5GPa/(g/cm3), more than 10 times the strength of T1000 carbon fibers

A research team at Tsinghua University has reported centimeter-scale carbon nanotube bundles with a strength of 80 GPa

Stiffness (modulus) :

Nanocarbon fiber

The Young's modulus of carbon nanotubes is higher than 1TPa, which indicates that they have very high stiffness

The tensile modulus of carbon nanofibers can reach 400GPa to 600GPa

Other properties:

In addition to the characteristics of high strength and high mode, nanocarbon fiber also has good thermal conductivity and electrical conductivity, the thermal conductivity can reach 1950 W/m-K, and the resistivity is 55 Ω·μm

Performance in practical applications:

The strength of the actually prepared carbon nanotube fibers is only 0.5~11.5 GPa (specific strength 0.3~7 GPa/(g/cm3)), which is far lower than the theoretical strength of carbon nanotubes. The main reason is that the length of carbon nanotubes forming fibers is short, and the units are bonded with each other by van der Waals force, which is easy to slip each other under the action of tension. Unable to take advantage of the inherently high strength of carbon nanotubes