The assignee for this patent, patent number 8728993, is
Reporters obtained the following quote from the background information supplied by the inventors: "Polytetrafluoroethylene (PTFE) exhibits desirable tribological characteristics, including low friction, high melting temperature and chemical inertness. Based on these characteristics, PTFE is a frequently used solid lubricant both as a filler and matrix material. Without a filler, however, PTFE suffers from a relatively high wear rate, generally precluding its use in frictional applications, including use as a bearing material.
"As a matrix material, PTFE has been successfully filled with various nanoparticles, including alumina, zinca, and carbon nanotubes. Regarding alumina filling, Sawyer et al. [Sawyer, W. G., Freudenburg, K. D., Bhimaraj, P., and Schadler, L.
In addition to obtaining background information on this patent, VerticalNews editors also obtained the inventors' summary information for this patent: "A PTFE-based composite material comprises a PTFE comprising a major phase filled with a metal oxide minor phase. The major phase is intermixed with the metal oxide minor phase, wherein the minor phase comprises a plurality of irregularly shaped metal oxide nanoparticles. The minor phase can comprise 1 to 10 wt. % of said composite, such as 3 to 7 wt. %. In one embodiment, the metal oxide nanoparticles have shapes characteristic of milled particles. The metal oxide can comprise aluminum oxide. Regarding performance, the composite can provide a steady state wear rate of K
"A method of forming wear resistant composite materials comprises the steps of blending nanoscale metal oxide particles and PTFE particles, wherein the metal oxide particles are irregular shaped nanoparticles, and heating the nanoscale metal oxide particles and PTFE particles to form a nanocomposite. The heating step can comprise compression molding. A jet milling apparatus is preferably used for the blending step. In one embodiment, the metal oxide comprises aluminum oxide."
For more information, see this patent: Sawyer, W. Gregory; Burris,
Keywords for this news article include: Lubricants, Nanoparticle, Nanocomposite, Nanotechnology, Emerging Technologies,
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