Fused Porogen Process for Acoustic Septa Fabrication

    公开(公告)号:US20200247524A1

    公开(公告)日:2020-08-06

    申请号:US16852841

    申请日:2020-04-20

    Abstract: An example method for manufacturing a multicellular structure for acoustic damping is described that includes applying a porogen material to a solid support, inserting a multicellular frame into the solid support and through the porogen material so as to fill cells of the multicellular frame with the porogen material, fusing the porogen material, removing the multicellular frame from the solid support, and the multicellular frame contains a suspended fused porogen network attached to walls of the cells of the multicellular frame. The method also includes applying a solution to the suspended fused porogen network in the cells of the multicellular frame to percolate the suspended fused porogen network, curing the solution, and removing the suspended fused porogen network from the multicellular frame resulting in porous septum membranes of the cured solution in cells of the multicellular frame.

    HIERARCHICAL BUOYANT MATERIALS
    6.
    发明公开

    公开(公告)号:US20240101780A1

    公开(公告)日:2024-03-28

    申请号:US17934253

    申请日:2022-09-22

    CPC classification number: C08J9/236 C08K7/26 C08K7/28 C08J2300/00

    Abstract: Disclosed are hierarchical buoyant materials comprising porous components having multiple length scales that provide reduced density, higher strength, and improved buoyancy. The hierarchical buoyant materials include components having at least two length scales including a first porous material having elements characterized by a first linear length scale and a second porous material having elements characterized by a second linear length scale. The first porous material includes hollow microspheres, and the second porous material provides low effective density via geometrical arrangements. The second linear length scale is substantially different than the first linear length scale in terms of size, e.g., diameter, length, or distance. The second porous material is packed between the first porous material resulting in a combined material having a higher packing fraction than either the first porous material or the second porous material alone to provide reduced density, higher specific strength, and improved buoyancy per unit volume.

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