Composite friction materials having carbon nanotube and carbon nanofiber friction enhancers
AssigneeTribco Inc.
InventorsPeter FILIP, David N. Bortz, Brian Howells, Ashley R. Kelm, Tod Policandriotes
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Abstract
A textile-reinforced composite friction material is provided by the present invention that includes a nonwoven needlepunched fiber mat, a resin matrix impregnated within and onto the fiber mat, and a carbon nanomaterial dispersed within the resin matrix. The carbon nanomaterial is preferably carbon nanotubes and/or carbon nanofibers.
Claims17
-4. (canceled)
The composite friction material according to claim 16, further comprising fillers dispersed within the resin.
The composite friction material according to claim 16, wherein the resin matrix is selected from a group consisting of polyimide, phenolic, and epoxy.
The composite friction material according to claim 16, wherein the fiber mat is selected from a group comprising aramid, glass, ceramic, polyacrylnitrile and staple carbon or staple graphite fibers.
A friction product for use in a friction application comprising:
- a backing;
- and
- a friction composite according to claim 16 attached to the backing.
(canceled)
A composite friction material for use in friction applications comprising a nonwoven needlepunched fiber mat;
- a resin matrix impregnated in the fiber mat;
- and a carbon nanomaterial dispersed on and within the resin matrix and fiber mat, the carbon nanomaterial selected from the group consisting of carbon nanotubes and carbon nanofibers and comprising between approximately 0.0197 and approximately 0.080 by volume fraction of the composite material in an amount effective to improve the friction properties of the composite relative to the same composite without the carbon nanomaterial.
(canceled)
A composite friction material comprising:
- a carded and needlepunched fiber mat is selected from a group comprising aramid, glass, ceramic, polyacrylonitrile and staple carbon or staple graphite fibers;
- a resin matrix impregnated within the fiber mat;
- and a carbon nanomaterial selected from the group consisting of carbon nanotubes and carbon nanofibers dispersed within the resin matrix and comprising between approximately, 0.0197 and approximately 0.080 by volume fraction of the composite material in an amount effective to improve the friction properties of the composite relative to the same composite without the carbon nanomaterial.
-29. (canceled)
A composite friction material comprising:
- a nonwoven needlepunched fiber mat;
- a resin matrix impregnated in the needlepunched fiber mat;
- and a carbon nanomaterial selected from a group consisting of carbon nanotubes and carbon nanofibers dispersed on and within the resin matrix and fiber mat in an amount between approximately 0.0197 and approximately 0.080 by volume fraction of the composite friction material effective to increase the dynamic co-efficient of friction and to reduce the fade of the composite friction material.
Dependencies are inferred from the claim text.