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162 条记录 (耗时 0.021 秒)

    METHODS AND SYSTEMS FOR ELECTROSPINNING USING LOW POWER VOLTAGE CONVERTER
    61.
    发明申请
    METHODS AND SYSTEMS FOR ELECTROSPINNING USING LOW POWER VOLTAGE CONVERTER 有权

    公开(公告)号：US20220033994A1

    公开(公告)日：2022-02-03

    申请号：US17502611

    申请日：2021-10-15

    申请人： Fermi Research Alliance, LLC

    发明人： Sujit Bidhar

    IPC分类号： D01D5/00 ,  D01F6/94 ,  D01F1/09

    摘要： An electrospinning system, method, and apparatus comprises a dual polarity high voltage power supply with much less power out for safe operation, a solution dispensing assembly held at high positive potential by the dual polarity power supply, a Corona discharge assembly held at high negative potential by the dual polarity power supply, and a drum collector held at ground potential wherein a solution is drawn from the solution dispensing assembly to the drum collector thereby forming a fiber mat.

    Poylmeric composition for use as a temporary support material in extrusion based additive manufacturing
    62.
    发明授权
    Poylmeric composition for use as a temporary support material in extrusion based additive manufacturing 有权

    公开(公告)号：US11135777B2

    公开(公告)日：2021-10-05

    申请号：US16709364

    申请日：2019-12-10

    申请人： Xiaofan Luo ,  Zhaokun Pei ,  Haiqing Yin

    发明人： Xiaofan Luo ,  Zhaokun Pei ,  Haiqing Yin

    IPC分类号： B29C64/40 ,  C08L75/04 ,  B33Y70/00 ,  B33Y10/00 ,  B29K67/00 ,  B29K75/00 ,  D01F6/94 ,  D01F6/92 ,  B29C64/118

    摘要： The polymeric composition of this invention can be used as a temporary support material in the additive manufacturing of three dimensional articles without compromising the quality of the ultimate product, reducing printing speed, increasing cost, increasing the incidence of printer jamming, or requiring printers of increased complexity. This invention more specifically discloses a polymeric composition which is particularly useful as a temporary support material for utilization in three-dimensional printing, said polymeric composition being comprised of a first polymeric component which is suitable for use as a modeling material and a second polymeric component which is immiscible with the first polymeric component, wherein the polymeric composition has a continuous phase, wherein the continuous phase is comprised of the second polymeric component, and wherein the polymeric composition has a Shore A hardness of at least 80.

    SEMI-METALLIC, STRONG CONDUCTIVE POLYMER MICROFIBER, METHOD AND FAST RESPONSE RATE ACTUATORS AND HEATING TEXTILES
    65.
    发明申请
    SEMI-METALLIC, STRONG CONDUCTIVE POLYMER MICROFIBER, METHOD AND FAST RESPONSE RATE ACTUATORS AND HEATING TEXTILES 审中-公开

    公开(公告)号：US20170370024A1

    公开(公告)日：2017-12-28

    申请号：US15525005

    申请日：2015-12-03

    申请人： KING ABDULLAH UNIVERSITY OF SCIENCE AND TECHNOLOGY

    发明人： Jian ZHOU ,  Er Qiang LI ,  Gilles LUBINEAU ,  Sigurdur THORODDSEN ,  Matthieu MULLE

    IPC分类号： D01F6/74 ,  D01D10/02 ,  D01D5/12 ,  D01F6/94 ,  D01D5/06

    CPC分类号： D01F6/74 ,  D01D5/06 ,  D01D5/12 ,  D01D10/02 ,  D01F6/94

    摘要： A method comprising: providing at least one first composition comprising at least one conjugated polymer and at least one solvent, wet spinning the at least one first composition to form at least one first fiber material, hot-drawing the at least one fiber to form at least one second fiber material. In lead embodiments, high-performance poly(3,4-ethylenedioxy-thiophene)/poly(styrenesulfonate) (PEDOT/PSS) conjugated polymer microfibers were fabricated via wet-spinning followed by hot-drawing. In these lead embodiments, due to the combined effects of the vertical hot-drawing process and doping/de-doping the microfibers with ethylene glycol (EG), a record electrical conductivity of 2804 S·cm−1 was achieved. This is believed to be a six-fold improvement over the best previously reported value for PEDOT/PSS fibers (467 S·cm−1) and a twofold improvement over the best values for conductive polymer films treated by EG de-doping (1418 S·cm−1). Moreover, these lead, highly conductive fibers experience a semiconductor-metal transition at 313 K. They also have superior mechanical properties with a Young's modulus up to 8.3 GPa, a tensile strength reaching 409.8 MPa and a large elongation before failure (21%). The most conductive fiber also demonstrates an extraordinary electrical performance during stretching/unstretching: the conductivity increased by 25% before the fiber rupture point with a maximum strain up to 21%. Simple fabrication of the semi-metallic, strong and stretchable wet-spun PEDOT/PSS microfibers can make them available for conductive smart electronics. A dramatic improvement in electrical conductivity is needed to make conductive polymer fibers viable candidates in applications such as flexible electrodes, conductive textiles, and fast-response sensors and actuators.