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New nanotubes promise better dispersion

A new grade of carbon nanotubes (CNTs) reportedly offers improved dispersibility, making them well suited for use in mechanically sensitive polymers. Introduced at nano tech 2010 (Tokyo, Feb. 17-19), Baytubes C 70 P from Bayer MaterialScience (Leverkusen, Germany) also offer potential economic advantages generated by the shorter dispersion times required to mix the agglomerates in water and other low-viscosity liquids.

(Leverkusen, Germany) also offer potential economic advantages generated by the shorter dispersion times required to mix the agglomerates in water and other low-viscosity liquids. Bayer said the trial product is a response to customer requests for better dispersibility compared to its Baytubes C 150 P agglomerates. Apart from better mixing, particularly for mechanically sensitive thermoplastics, Bayer says the new grade exhibits the same properties that make multi-wall carbon nanotubes desirable, including large length-to-diameter ratios, high tensile strength, and exceptional electrical and thermal conductivity.

Baytubes are agglomerated CNTs that offer a high degree of purity that Bayer says is made possible by an "innovative processing method developed in-house." Potential applications range from sporting goods to electronics. Bayer recently started up a new pilot plant for CNTs with an annual capacity of 200 tons in Leverkusen. 

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