reinforced polymer composite material mwcnt, mwcnt price, mwcnt suppliers
Spec: diameter: 10-30nm, 30-60nm, 60-100nm, length: 1-2um or 5-20um, Purity: >99%
Carbon Nanotubes performance is far superior glass fiber commonly used today. One of its main use is as a reinforced polymer composite material.
Single-walled carbon nanotubes can basically be divided into two types and multi wall. Although they look very similar at first glance, but its production methods and performance vary. Nanotube structure determines that they are having a metallic or semiconducting properties. About two-thirds of single-walled nanotubes are semiconductor-type, one-third belong to metal type. As for the multi-walled nanotubes mwcnt, due to the superposition of layers of shell performance, it is difficult to make a clear distinction, but in general is a metal type.
Mechanical properties of carbon nanotubes is quite prominent. Now measure the average elastic modulus mwcnt is 1.8TPa. The tensile strength of carbon nanotubes experimental value of about 200GPa, is 100 times that of steel, 20 times the carbon fibers. Flexural strength of the carbon nanotube 14.2GPa, although the tensile strength of carbon nanotubes is so high, but they are not as high as the brittleness of carbon fiber. Carbon fiber at about 1% deformation will break, and the carbon nanotubes to about 18% when deformed will break. Interlaminar shear strength between the carbon nanotubes up to 500MPa, than conventional carbon fiber reinforced epoxy resin composites an order of magnitude.
In electrical properties, carbon nanotubes used as a polymer filler has unique advantages. Add a small amount of carbon nanotubes can greatly improve the conductivity of the material. To improve the electrical conductivity as compared with conventional carbon black was added to the resin, the carbon nanotubes have a high aspect ratio, and therefore, the volume content of carbon black to reduce the number of spherical comparable. MWCNT average aspect ratio of about 1000; at the same time, due to the length of the nanotube itself is very short and soft music is good, they will not break when you fill in the polymer matrix, thus able to maintain its high aspect ratio.
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