Tuesday, June 22, 2010

US Patent 7740997 - Photoreceptor including polymeric material embedded in CNTs


In order to improve the lifetime and image quality for photosensitive drums used in laser printers this patent from Xerox teaches polymer on carbon nanotube material as an enhanced charge storage medium. Claim 1 reads:

1. An electrophotographic imaging member comprising:

a substrate,

a photogenerating layer, and

an optional overcoating layer

wherein the photogenerating layer comprises a multi-block polymeric charge transport material at least partially attached to a surface of a carbon nanotube material, and

the multi-block polymeric charge transport material comprises a charge transport block and a non-charge transport block, wherein the charge transport block is attached to the surface of the carbon nanotube material.