Wednesday, June 08, 2011

US Patent 7955535 - MWNT macroscale films

This patent from the University of Florida teaches a method of forming flexible films of multiwall carbon nanotubes without requiring chemical bonding agents. Claim 1 reads:

1. A method for making a macroscale film, comprising the steps of:

forming a suspension which comprises a mixture of (i) single wall nanotubes (SWNTs) and (ii) multiwall nanotubes (MWNTs) or carbon nanofibers (CNFs), or both MWNTs and CNFs, dispersed in a liquid, wherein the weight ratio of SWNTs to MWNTs, CNFs, or both MWNTs and CNFs in the suspension is 1:3; and

removing the liquid to form a macroscale film which comprises MWNTs, CNFs or a combination thereof, interspersed with SWNTs.