公开(公告)号：US09714370B2

公开(公告)日：2017-07-25

申请号：US14037991

申请日：2013-09-26

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

Inventor： Randy A. Mrozek ,  Joseph L. Lenhart

IPC: H01B1/24 ,  H01B1/02 ,  C01B31/04 ,  H01M4/60 ,  C09K5/14 ,  H01B1/20 ,  H01B1/22

CPC classification number: C09K5/14 ,  H01B1/20 ,  H01B1/22 ,  H01B1/24

Abstract: Electrically and/or thermally conductive polymer composites and methods of preparing same are provided. In some embodiments, a method for preparing an electrically and/or thermally conductive polymer composite may include (1) mixing a polymer, a conductive particulate filler, and a solvent to form a non-conductive polymer solution or melt; (2) processing, the non-conductive polymer solution or melt to form a non-conductive polymer network composition; wherein the presence of solvent during three-dimensional network formation manipulates the polymer network structure; and (3) removing the solvent from the non-conductive polymer network composition to form an electrically and/or thermally conductive polymer composite. The altered polymer chain structure present in the non-conductive polymer network composition is maintained in the composite, and offsets the impact of particulate filler addition including increased modulus, decreased elasticity, and decreased elongation at break. This method enables development of composite materials with electrical/thermal and mechanical performance that can be tailored independently.

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。

公开(公告)号：US09695258B2

公开(公告)日：2017-07-04

申请号：US14318736

申请日：2014-06-30

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

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

IPC: C08F22/06 ,  C08F8/00

CPC classification number: C08F22/06 ,  C08F8/00

Abstract: Methods of adjusting the mechanical properties of a polymeric material may include forming a polymer network having a plurality of permanent cross-links and coupled to a plurality of reversible cross-links, wherein the polymer network has a shear storage modulus of greater than about 4×104 Pa; and heating the polymer network using a heat source to dissociate the reversible cross-links, wherein heating the polymer network reduces the shear storage modulus to less than about 4×104 Pa. In some embodiments, a polymeric material may include a polymer network comprising a plurality of permanent cross-links and coupled to a plurality of reversible cross-links that are dissociable with the application of a stimulus and associable with the removal of the stimulus, wherein the shear storage modulus of the polymer network is less than about 4×104 Pa in the presence of the stimulus and greater than about 4×104 Pa in the absence of the stimulus.

公开(公告)号：US20150129808A1

公开(公告)日：2015-05-14

申请号：US14294252

申请日：2014-06-03

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

Inventor： Randy A. Mrozek ,  Joesph L. Lenhart ,  Geoffrey A. Slipher

IPC: H01B1/24 ,  H01B1/22

CPC classification number: H01B1/24 ,  B64D17/02 ,  H01B1/22 ,  H01B3/28 ,  H01B3/30 ,  H01B3/305 ,  H01B3/306 ,  H01B3/40 ,  H01B3/441 ,  H01B3/442 ,  H01B3/443 ,  H01B3/445 ,  H01B3/447 ,  H01B3/46 ,  H01B7/06

Abstract: The present invention generally relates to deformable polymer composites, and more particularly to, deformable polymer composites with controlled electrical performance during deformation through tailored strain-dependent conductive filler contact. According to embodiments, a deformable elastomeric conductive material includes: an elastomeric polymer matrix; and conductive filler material uniformly dispersed in the elastomeric polymer matrix sufficient to render the material electrically or thermally conductive. The conductive filler material comprises a plurality of substantially non-entangled particles having an aspect ratio sufficiently large to enable the particles to substantially remain in contact and/or in close proximity with adjacent particles so as to maintain conductive pathways in the material when the material is subjected to deformation up to and exceeding 10% strain.

Abstract translation: 本发明一般涉及可变形的聚合物复合材料，更具体地说，涉及可变形聚合物复合材料，其通过经过定制的应变依赖性导电填料接触在变形期间具有受控的电性能 根据实施方案，可变形的弹性体导电材料包括：弹性聚合物基体; 以及均匀分散在弹性体聚合物基质中的导电填料，足以使材料导电或导热。 导电填料材料包括多个基本上非缠结的颗粒，其纵横比足够大，以使得颗粒能够与相邻颗粒基本上保持接触和/或紧密接近，以便当材料为 经受变形达到或超过10％的应变。

公开(公告)号：US20150083961A1

公开(公告)日：2015-03-26

申请号：US14037991

申请日：2013-09-26

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

Inventor： Randy A. Mrozek ,  Joseph L. Lenhart

IPC: C09K5/14 ,  H01B1/24 ,  H01B1/22 ,  H01B1/20

CPC classification number: C09K5/14 ,  H01B1/20 ,  H01B1/22 ,  H01B1/24

Abstract: Electrically and/or thermally conductive polymer composites and methods of preparing same are provided. In some embodiments, a method for preparing an electrically and/or thermally conductive polymer composite may include (1) mixing a polymer, a conductive particulate filler, and a solvent compatible with the polymer to form a non-conductive polymer solution or melt; (2) processing, the non-conductive polymer solution or melt to form a non-conductive polymer network composition; wherein the presence of solvent during three-dimensional network formation manipulates the polymer network structure; and (3) removing the solvent from the non-conductive polymer network composition to form an electrically and/or thermally conductive polymer composite. The altered polymer chain structure present in the non-conductive polymer network composition is maintained in the composite, and offsets the impact of particulate filler addition including increased modulus, decreased elasticity, and decreased elongation at break. This method enables development of composite materials with electrical/thermal and mechanical performance that can be tailored independently.

Abstract translation: 提供导电和/或导热聚合物复合材料及其制备方法。 在一些实施方案中，制备电和/或导热聚合物复合材料的方法可以包括（1）混合聚合物，导电颗粒填料和与聚合物相容的溶剂以形成非导电聚合物溶液或熔体; （2）加工，不导电聚合物溶液或熔体形成非导电聚合物网络组成; 其中在三维网络形成期间溶剂的存在操纵所述聚合物网络结构; 和（3）从非导电聚合物网络组合物中除去溶剂以形成导电和/或导热的聚合物复合材料。 存在于非导电聚合物网络组合物中的改变的聚合物链结构保持在复合材料中，并抵消颗粒填料添加的影响，包括增加的模量，降低的弹性和降低的断裂伸长率。 该方法能够开发具有电/热和机械性能的复合材料，可以独立定制。

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：US20150376304A1

公开(公告)日：2015-12-31

申请号：US14318736

申请日：2014-06-30

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

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

IPC: C08F22/06 ,  C08F8/00

CPC classification number: C08F22/06 ,  C08F8/00

Abstract: Methods of adjusting the mechanical properties of a polymeric material may include forming a polymer network having a plurality of permanent cross-links and coupled to a plurality of reversible cross-links, wherein the polymer network has a shear storage modulus of greater than about 4×104 Pa; and heating the polymer network using a heat source to dissociate the reversible cross-links, wherein heating the polymer network reduces the shear storage modulus to less than about 4×104 Pa. In some embodiments, a polymeric material may include a polymer network comprising a plurality of permanent cross-links and coupled to a plurality of reversible cross-links that are dissociable with the application of a stimulus and associable with the removal of the stimulus, wherein the shear storage modulus of the polymer network is less than about 4×104 Pa in the presence of the stimulus and greater than about 4×104 Pa in the absence of the stimulus.

Abstract translation: 调整聚合物材料的机械性能的方法可包括形成具有多个永久性交联并且耦合到多个可逆交联的聚合物网络，其中聚合物网络的剪切储能模量大于约4× 104 Pa; 并且使用热源加热聚合物网络以解离可逆交联，其中加热聚合物网络将剪切储能模量降低到小于约4×10 4 Pa。在一些实施方案中，聚合物材料可以包括聚合物网络，其包含 多个永久性交联并且耦合到多个可逆交联，其可通过施加刺激而解离并与去除刺激相关联，其中聚合物网络的剪切储能模量小于约4×10 4 Pa，在没有刺激的情况下大于约4×104Pa。

公开(公告)号：US20150129276A1

公开(公告)日：2015-05-14

申请号：US14163016

申请日：2014-01-24

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

Inventor： Justin L. Shumaker ,  Geoffrey A. Slipher ,  Randy A. Mrozek

IPC: H01B11/00 ,  H01B3/30 ,  H01B7/06 ,  H04L5/14 ,  H01B3/46 ,  B64D17/00 ,  H01B3/44 ,  H01B3/40 ,  H01B3/28 ,  H01B1/22 ,  B64D1/00

CPC classification number: H01B1/24 ,  B64D17/02 ,  H01B1/22 ,  H01B3/28 ,  H01B3/30 ,  H01B3/305 ,  H01B3/306 ,  H01B3/40 ,  H01B3/441 ,  H01B3/442 ,  H01B3/443 ,  H01B3/445 ,  H01B3/447 ,  H01B3/46 ,  H01B7/06

Abstract: This application generally relates to deformable elastomeric conductors and differential signaling transmission techniques. According to one embodiment, a deformable elastomeric conductor is configured to transmit electrical signals. It comprises: an elastomeric polymer matrix; and conductive filler material uniformly dispersed in the elastomeric polymer matrix sufficient to render the material electrically conductive. The conductive filler material may include substantially non-entangled particles having an aspect ratio sufficiently large to enable the particles to substantially remain in contact and/or in close proximity with adjacent particles so as to maintain conductive pathways in the material when the material is subjected to deformation up to and exceeding 10% strain. Thus, over a transmission distance of an electrical signal through the conductor, the transmission does not suffer greater than about 3 dB of signal attenuation when subjected to the deformation.

Abstract translation: 本申请通常涉及可变形弹性体导体和差分信号传输技术。 根据一个实施例，可变形弹性体导体被配置成传输电信号。 它包括：弹性聚合物基体; 以及均匀分散在弹性体聚合物基质中的导电填料，足以使材料导电。 导电填料材料可以包括基本上非缠结的颗粒，其纵横比足够大，以使得颗粒基本上保持与相邻颗粒的接触和/或紧密接近，以便当材料经受 变形高达和超过10％的应变。 因此，在通过导体的电信号的传输距离上，当经受变形时，传输不会遭受大于3dB的信号衰减。