CNT/fluoropolymer coating composition

摘要

Exemplary embodiments provide nanotube-containing coating compositions and methods for making and using the coating compositions. In an exemplary embodiment, the coating composition can include a plurality of nanotubes (e.g., carbon nanotubes (CNTs)) dispersed stably and uniformly in a polymer matrix containing fluoropolymers. The coating composition can further include stabilizers to allow a stable and/or uniform dispersion of the plurality of nanotubes in the fluoropolymers. The nanotube coating composition can be coated on an article surface to improve mechanical robustness, and electrical and thermal conductivity of the coated article. The coated article can be used as, for example, a fuser member, a fixing member, a pressure roller, or a release agent donor member in an electrostatographic printing machine or process.

主权项

1. A coated article comprising:
a substrate, and a coated layer disposed over the substrate and formed from a coating composition applied on the substrate, the coated layer having a thickness ranging from about 5 microns to about 20 microns, wherein the coating composition comprises: a polyfluoroalkoxypolytetrafluorethylene fluoropolymer; a plurality of nanotubes dispersed in a media; and a stabilizer mixed with the fluoropolymer and the plurality of nanotubes in the media, the stabilizer being a partially neutralized polyallylamine polymer comprising i) an amino substituent and ii) an ammonium ion substituent or salt thereof at a pH value ranging from 5 to 9, the stabilizer allowing a stable dispersion of the plurality of nanotubes in the media and in the fluoropolymer, the stabilizer having a molecular weight ranging from 300 to about 100,000, wherein the coated article is one of a fuser roll, a fixing roll, a pressure roller, and a release agent donor roll for an electrostatographic device.