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    Densifying a nanofiber sheet using heat and force
    1.
    发明授权
    Densifying a nanofiber sheet using heat and force 有权

    公开(公告)号：US11155959B2

    公开(公告)日：2021-10-26

    申请号：US16009578

    申请日：2018-06-15

    申请人： Lintec of America, Inc.

    发明人： Chi Huynh

    IPC分类号： D06M10/04 ,  D06C15/00 ,  C01B32/168 ,  D06M101/40

    摘要： Methods and systems are described for continuously densifying at least one nanofiber sheet using heat and an applied force that can include both compressive and tensile components. Nanofiber sheets densified using these techniques have a more uniform and more highly aligned microstructure than nanofiber sheets densified using a solvent alone. As a result, the nanofiber sheets of the present disclosure have, for example, higher tensile strength and better electrical conductivity than nanofiber sheets densified using other techniques.

    DENSIFYING A NANOFIBER FOREST
    4.
    发明申请
    DENSIFYING A NANOFIBER FOREST 审中-公开

    公开(公告)号：US20180305212A1

    公开(公告)日：2018-10-25

    申请号：US15956269

    申请日：2018-04-18

    申请人： Lintec of America, Inc.

    发明人： Chi Huynh

    IPC分类号： C01B32/168 ,  D02J1/04

    CPC分类号： C01B32/168 ,  B82Y30/00 ,  B82Y40/00 ,  C01B2202/08 ,  D02J1/04

    摘要： A nanofiber forest is described that has been processed to increase a number of nanofibers per unit area (referred to as “areal density” or, equivalently, “density”) compared to the nanofiber forest in its as-synthesized state. This increase in areal density is accomplished by physically manipulating a deformable substrate on which the nanofiber forest is disposed. At a high level, this physical manipulation begins by transferring the nanofiber forest from a growth substrate to a deformable substrate. A surface area of the deformable substrate is reduced relative to a surface area of the substrate when the nanofiber forest was attached. This reduction in area causes the nanofibers in the forest to move closer to one another, thus increasing the number of nanofibers per unit area.

    Transferring nanofiber forests between substrates
    6.
    发明授权
    Transferring nanofiber forests between substrates 有权

    公开(公告)号：US11613468B2

    公开(公告)日：2023-03-28

    申请号：US17376844

    申请日：2021-07-15

    申请人： Lintec of America, Inc.

    发明人： Chi Huynh

    IPC分类号： C01B32/00 ,  C01B32/168 ,  B82Y30/00 ,  B82Y40/00 ,  B32B5/12 ,  B32B37/26 ,  B32B37/00

    摘要： Techniques are described for transferring nanofiber forests using transfer films that either lack a conventional adhesive at the substrate-nanofiber forest interface or that include a diffusion barrier that prevents diffusion of adhesive molecules (or other polymer molecules mobile at ambient temperatures) into the nanofiber forest. These techniques can be applied to single layer nanofiber forests or stacks of multiple nanofiber forest. By selecting the bond strength between the nanofiber forest and the transfer films, the nanofibers can be aligned in a common direction that includes, but is not limited to, perpendicular to a substrate or transfer film.

    Patterning a nanofiber forest
    7.
    发明授权
    Patterning a nanofiber forest 有权

    公开(公告)号：US11135827B2

    公开(公告)日：2021-10-05

    申请号：US16589269

    申请日：2019-10-01

    申请人： Lintec of America, Inc.

    发明人： Chi Huynh

    IPC分类号： B32B38/10 ,  B32B38/00 ,  B32B7/12 ,  B32B37/00 ,  B32B37/12 ,  C01B32/168

    摘要： A nanofiber forest that includes a pattern or shape can be transferred to a substrate. The nanofiber forest can be configured to have any perimeter and/or internal shape or pattern using a stencil technique and/or using an engraving technique. This pattern can be transferred as a “negative image” of a corresponding pattern in a stencil or as a “positive image” by engraving the pattern directly into the nanofiber forest. For either type of pattern formation, the patterned nanofiber forest is transferred by applying a substrate to the pattern or to a nanofiber forest covered by a patterned stencil. Pressure is then applied causing the exposed surface of the nanofiber forest or pattern of nanofiber forest to adhere to the substrate.

    Transferring nanofiber forests between substrates
    8.
    发明授权
    Transferring nanofiber forests between substrates 有权

    公开(公告)号：US11084724B2

    公开(公告)日：2021-08-10

    申请号：US16190329

    申请日：2018-11-14

    申请人： Lintec of America, Inc.

    发明人： Chi Huynh

    IPC分类号： C01B32/00 ,  C01B32/168 ,  B82Y30/00 ,  B82Y40/00 ,  B32B5/12 ,  B32B37/26 ,  B32B37/00

    摘要： Techniques are described for transferring nanofiber forests using transfer films that either lack a conventional adhesive at the substrate—nanofiber forest interface or that include a diffusion barrier that prevents diffusion of adhesive molecules (or other polymer molecules mobile at ambient temperatures) into the nanofiber forest. These techniques can be applied to single layer nanofiber forests or stacks of multiple nanofiber forest. By selecting the bond strength between the nanofiber forest and the transfer films, the nanofibers can be aligned in a common direction that includes, but is not limited to, perpendicular to a substrate or transfer film.

    Densifying a nanofiber forest
    9.
    发明授权
    Densifying a nanofiber forest 有权

    公开(公告)号：US10894718B2

    公开(公告)日：2021-01-19

    申请号：US15956269

    申请日：2018-04-18

    申请人： Lintec of America, Inc.

    发明人： Chi Huynh

    IPC分类号： C01B32/168 ,  D02J1/04 ,  B82Y40/00 ,  B82Y30/00

    摘要： A nanofiber forest is described that has been processed to increase a number of nanofibers per unit area (referred to as “areal density” or, equivalently, “density”) compared to the nanofiber forest in its as-synthesized state. This increase in areal density is accomplished by physically manipulating a deformable substrate on which the nanofiber forest is disposed. At a high level, this physical manipulation begins by transferring the nanofiber forest from a growth substrate to a deformable substrate. A surface area of the deformable substrate is reduced relative to a surface area of the substrate when the nanofiber forest was attached. This reduction in area causes the nanofibers in the forest to move closer to one another, thus increasing the number of nanofibers per unit area.

    Nanofiber thermal interface material
    10.
    发明授权
    Nanofiber thermal interface material 有权

    公开(公告)号：US10590539B2

    公开(公告)日：2020-03-17

    申请号：US15903420

    申请日：2018-02-23

    申请人： Lintec of America, Inc.

    发明人： Chi Huynh ,  Masaharu Ito

    IPC分类号： C23C16/56 ,  C23C16/44 ,  C01B32/15 ,  C23C16/40

    摘要： A nanofiber structure is described that is composed of a substrate and a layer of oriented nanofibers. Nanofibers of the layer can be oriented in a common direction. An angle of the common direction can be selected so that nanofibers of the sheet are oriented at an angle with respect to an underlying substrate even if the underlying substrate is not planar. The angle can be used to adapt the sheets to demands as a thermal interface material.