Importance

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Abstract

A foam material is an open-cell material, with ordered voids forming an interconnected network of voids within a continuous material matrix. The voids may be spherical. There may be different sizes of voids, with the smaller voids located between larger voids. The continuous material matrix may include a polymer material, such as a shape memory polymer. Balloons or spheres may be included within the continuous material matrix to further reduce the density of the foam material. The foam material may have a global density of 20% or less. The density of the material may vary, perhaps continuously, with position within the foam material. The foam material may be made by producing an array of a removable material corresponding to the shape of the voids, forming the continuous material matrix around the removable material, and then removing the removable material, such as by dissolving the removable material.

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First Claim