Thursday, November 30, 2006

US Patent 7141518 - Charged Nanoparticle Fabrics

This patent proposes the use of charged nanoparticle coatings on fabrics and other substrates to facilitate odor absorption and chemical removal. Claim 1 reads:

1. A fibrous substrate comprising: nanoparticles having a surface area of at least about 50 square meters per gram, wherein the nanoparticles are modified with a metal ion and have a negative zeta potential prior to modification with the metal ion, and wherein the zeta potential of the modified nanoparticles is from about -5 millivolts to about -15 millivolts and is greater than the zeta potential of the nanoparticles prior to modification; and a binder that durably adheres the modified nanoparticles to the substrate.