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Goodfellow’s (Coraopolis, Pa., U.S.) multi-walled carbon nanotubes (MWCNTs) are available in three different forms: regular powder, “chunky” powder and free-standing “carpets.” All three forms are produced by means of a catalytic chemical vapor deposition (CCVD) process.

Regular powder is available in research quantities of several grams up to economical mass production quantities of several kilos.

What the company calls “chunky” powder, exclusive to Goodfellow, is said to be safer and easily dispersed via sonication into a polymer matrix. It is available in small quantities for research.

Free-standing, vertically aligned MWCNTs arrays, called “carpets” or “forests” — also exclusive to Goodfellow — are distinguished by their anisotropic properties. According to the company, current research revolves around potential uses as free-standing membranes and filters, thermal interface materials, in electronic devices and supercapacitors, and by embedding them in polymer matrices for the production of innovative composites. MWCNTs “carpets” are available in small quantities for research.

Carbon nanotubes are tube-shaped materials composed of carbon atoms covalently bonded in hexagonal network, having a nanometric diameter. As an additive in composites, they can improve the mechanical, thermal or electrical properties of a material, offering benefits such as high electrical conductivity, good processability, flame retardancy, thermal dissipation, UV resistance and more. Industries where these attributes are especially beneficial include aerospace, automotive, electronics, energy, oil and gas, coatings and sporting goods.