公开(公告)号：US20180273438A1

公开(公告)日：2018-09-27

申请号：US15466893

申请日：2017-03-23

Applicant: U.S. Army Research Laboratory ATTN: RDRL-LOC-I

Inventor： Paul J. Conroy ,  Raymond A. Wildman ,  Eric J. Robinette ,  John R. Schmidt ,  Andrew T. Gaynor

IPC: C06B21/00 ,  C06B45/00

CPC classification number: C06B21/0033 ,  C06B45/00

Abstract: A method of manufacturing and optimizing energetic propellant grains includes generating an optimal surface area to mass fraction burned ratio profile for a predetermined solid structure including propellant grains; using the profile as a target function of a topological optimization process to generate a 3D form of a propellant grain; developing a negative of the 3D form of the propellant grain; mixing and densifying the negative with an energetic material in an uncured form in a mixer to create a structure including the energetic material and embedded negative; and solvating the negative from the structure, wherein the negative comprises a 3D propellant grain. The developing of the negative of the 3D form of the propellant grain may occur using a predetermined material in an additive manufacturing process. The negative may be soluble in the predetermined material, and the energetic material may be insoluble in the predetermined material.

公开(公告)号：US10369248B2

公开(公告)日：2019-08-06

申请号：US14445089

申请日：2014-07-29

Applicant: U.S. Army Research Laboratory ATTN: RDRL-LOC-I

Inventor： Randy A. Mrozek ,  Joseph L. Lenhart ,  Michael C. Berg ,  Eric J. Robinette

IPC: C08J9/26 ,  C08J9/28 ,  A61L24/00

Abstract: Porous polymer composites and methods of preparing porous polymer composites are provided herein. In some embodiments, a method for preparing porous polymer composites may include mixing a first polymer with a solvent and a particulate filler to form a first polymer composition, wherein the amount of particulate filler in the first polymer composition is below a mechanical percolation threshold; and removing the solvent from the first polymer composition to concentrate the first polymer and particulate filler into a second polymer composition having a porous structure, wherein the particulate filler concentration in the second polymer composition is increased above the mechanical percolation threshold during solvent removal.

公开(公告)号：US10906848B2

公开(公告)日：2021-02-02

申请号：US15466893

申请日：2017-03-23

Applicant: U.S. Army Research Laboratory ATTN: RDRL-LOC-I

Inventor： Paul J. Conroy ,  Raymond A. Wildman ,  Eric J. Robinette ,  John R. Schmidt ,  Andrew T. Gaynor

IPC: C06B21/00 ,  C06B45/00

Abstract: A method of manufacturing and optimizing energetic propellant grains includes generating an optimal surface area to mass fraction burned ratio profile for a predetermined solid structure including propellant grains; using the profile as a target function of a topological optimization process to generate a 3D form of a propellant grain; developing a negative of the 3D form of the propellant grain; mixing and densifying the negative with an energetic material in an uncured form in a mixer to create a structure including the energetic material and embedded negative; and solvating the negative from the structure, wherein the negative comprises a 3D propellant grain. The developing of the negative of the 3D form of the propellant grain may occur using a predetermined material in an additive manufacturing process. The negative may be soluble in the predetermined material, and the energetic material may be insoluble in the predetermined material.

公开(公告)号：US20160030625A1

公开(公告)日：2016-02-04

申请号：US14445089

申请日：2014-07-29

Applicant: U.S. Army Research Laboratory ATTN: RDRL-LOC-I

Inventor： Randy A. Mrozek ,  Joseph L. Lenhart ,  Michael C. Berg ,  Eric J. Robinette

IPC: A61L24/00 ,  C08J9/26 ,  C08J9/28

CPC classification number: A61L24/0036 ,  A61L24/0015 ,  A61L2300/418 ,  A61L2400/04 ,  A61L2400/08 ,  C08J9/26 ,  C08J9/28 ,  C08J2201/0543 ,  C08J2207/10 ,  C08J2207/12 ,  C08J2353/02

Abstract: Porous polymer composites and methods of preparing porous polymer composites are provided herein. In some embodiments, a method for preparing porous polymer composites may include mixing a first polymer with a solvent and a particulate filler to form a first polymer composition, wherein the amount of particulate filler in the first polymer composition is below a mechanical percolation threshold; and removing the solvent from the first polymer composition to concentrate the first polymer and particulate filler into a second polymer composition having a porous structure, wherein the particulate filler concentration in the second polymer composition is increased above the mechanical percolation threshold during solvent removal.

Abstract translation: 多孔聚合物复合材料和多孔聚合物复合材料的制备方法。 在一些实施方案中，制备多孔聚合物复合材料的方法可包括将第一聚合物与溶剂和颗粒填料混合以形成第一聚合物组合物，其中第一聚合物组合物中颗粒填料的量低于机械渗滤阈值; 以及从所述第一聚合物组合物中除去溶剂以将所述第一聚合物和颗粒填料浓缩成具有多孔结构的第二聚合物组合物，其中在除去溶剂期间所述第二聚合物组合物中的颗粒填料浓度高于机械渗透阈值。