Composite foams
AssigneeThe United States of America as represented by the United States Department of Energy
InventorsJoel M. Williams, Jr., Alice M. Nyitray, Mark H. Wilkerson
Life of this patent
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Abstract
Composite foams are provided comprising a first rigid, microcellular, open-celled organic polymer foam having a density of from about 0.015 g/cm.sup.3 to about 0.20 g/cm.sup.3 and a pore size of from about 1 micron to about 30 microns, said first foam containing a second polymer having a density of from about 0.015 g/cm.sup.3 to about 0.20 g/cm.sup.3 or a second polymer foam having a density of from about 0.015 g/cm.sup.3 to about 0.20 g/cm.sup.3 and a pore size of from about 0.01 microns to about 1.0 micron within the open cells of said first foam.
Claims17
A composite foam comprising:
- a first rigid, microcellular, open-celled organic polymer foam having a density of from about 0.015 g/cm.sup.3 to about 0.20 g/cm.sup.3 and a pore size of from about 1 micron to about 30 microns, said first foam containing a second polymer foam having a density of from about 0.015 g/cm.sup.3 to about 0.60 g/cm.sup.3 and a pore size of from about 0.01 microns to about 1.0 micron within the open cells of said first foam, said second foam having a smaller pore size than said first foam.
A composite foam material comprising a rigid, microcellular, open-celled foam selected from the group consisting of polystyrene foam or carbon foam having a density of from about 0.015 g/cm.sup.3 to about 0.20 g/cm.sup.3 and a pore size of from about 1 micron to about 30 microns, said polystyrene or carbon foam containing a second polymeric foam material having a density of from about 0.001 g/cm.sup.3 to about 0.60 g/cm.sup.3 and a pore size of from about 0.01 microns to about 1.0 micron within the open cells of the polystyrene or carbon foam, said second foam having a smaller pore size than said first foam.
A cryogenic inertial confinement fusion target comprising a sphere composed of a first rigid, microcellular, open-celled foam selected from the group consisting of polystyrene and carbon foams, having a density of from about 0.015 g/cm.sup.3 to about 0.10 g/cm.sup.3 and a pore size of from about 1 micron to about 30 microns, said foam containing a second polymeric foam material having a density of from about 0.01 g/cm.sup.3 to about 0.1 g/cm.sup.3 and a pore size of from about 0.01 microns to about 1.0 microns within the open cells of the open-celled foam, said second foam having a smaller pore size than said first foam.
A composite foam material comprising a rigid, microcellular, open-celled organic polymer foam having a density of from about 0.015 g/cm.sup.3 to about 0.20 g/cm.sup.3 and a pore size of from about 1 micron to about 30 microns, said organic polymer containing another polymer material having a density of from about 0.001 g/cm.sup.3 to about 0.60 g/cm.sup.3 coating the walls of said organic polymer foam, said second mentioned polymer having a smaller pore size than said first foam.
Dependencies are inferred from the claim text.