Pyrograf®-III Stacked-Cup Carbon Nanotubes

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Pyrograf®-III is a patented, highly graphitic, low-cost carbon nanotube with properties approaching the theoretical values of graphite in almost every performance characteristic. Pyrograf®-III carbon nanotubes are a highly pure product with over 99.9% fibrous material and very low metal concentrations.

Pyrograf®-III carbon nanotubes possesses a unique morphology not available in other nanomaterial producers. Pyrograf®-III carbon nanotubes have a tubular structure with the sidewalls composed of angled graphite sheets. This morphology termed "stacked cup" or "herringbone" generates a fiber with exposed edge planes along the entire surface of the fiber. These edge sites are highly reactive and allow chemical modification of the fiber surface for maximum mechanical reinforcement in polymer composites.

Pyrograf®-III provides multifunctional benefits due to it's unique structure. In most polymer systems it provides excellent mechanical reinforcement and electrical conductivity at low loadings.

Pyrograf Products, Inc. currently offers two commercial types of carbon nanofiber in a dry powder form called PR-19 and PR-24. PR-19 has an average diameter of 150 nanometers while the PR-24 has an average diameter of 100 nanometers as measured by scanning electronic microscopic methods. These two types of fiber come in three grades with different surface energies, surface areas, and metal concentrations.

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