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12 条记录 (耗时 0.023 秒)

    Bulk preparation of holey graphene via controlled catalytic oxidation
    3.
    发明授权
    Bulk preparation of holey graphene via controlled catalytic oxidation 有权
    通过控制催化氧化大量制备多孔石墨烯

    公开(公告)号：US09120677B2

    公开(公告)日：2015-09-01

    申请号：US13986105

    申请日：2013-04-01

    申请人： National Institute of Aerospace Associates ,  U.S.A., as represented by the Administrator of the National Aeronautics and Space Administration

    发明人： Kent Watson ,  Yi Lin ,  Sayata Ghose ,  John Connell

    IPC分类号： C01B31/02 ,  C01B31/04 ,  C01B31/00 ,  B82Y30/00 ,  B82Y40/00 ,  D01F9/12

    CPC分类号： C01B31/0484 ,  B82Y30/00 ,  B82Y40/00 ,  C01B32/152 ,  C01B32/168 ,  C01B32/17 ,  C01B32/194 ,  C01B32/23 ,  D01F9/12

    摘要： A scalable method allows preparation of bulk quantities of holey carbon allotropes with holes ranging from a few to over 100 nm in diameter. Carbon oxidation catalyst nanoparticles are first deposited onto a carbon allotrope surface in a facile, controllable, and solvent-free process. The catalyst-loaded carbons are then subjected to thermal treatment in air. The carbons in contact with the carbon oxidation catalyst nanoparticles are selectively oxidized into gaseous byproducts such as CO or CO2, leaving the surface with holes. The catalyst is then removed via refluxing in diluted nitric acid to obtain the final holey carbon allotropes. The average size of the holes correlates strongly with the size of the catalyst nanoparticles and is controlled by adjusting the catalyst precursor concentration. The temperature and time of the air oxidation step, and the catalyst removal treatment conditions, strongly affect the morphology of the holes.

    摘要翻译： 可扩展的方法允许制备大量的具有从几个到超过100nm直径的孔的多孔碳同素异形体。 首先将碳氧化催化剂纳米颗粒以容易，可控和无溶剂的方法沉积在碳同素异形体表面上。 然后将负载催化剂的碳在空气中进行热处理。 与碳氧化催化剂纳米颗粒接触的碳被选择性氧化成气态副产物如CO或CO 2，留下表面有孔。 然后通过在稀硝酸中回流除去催化剂，得到最终的多孔碳同素异形体。 孔的平均尺寸与催化剂纳米颗粒的尺寸密切相关，并且通过调节催化剂前体浓度来控制。 空气氧化步骤的温度和时间以及催化剂去除处理条件对孔的形态有很大的影响。

    Robust, flexible and lightweight dielectric barrier discharge actuators using nanofoams/aerogels
    8.
    发明授权
    Robust, flexible and lightweight dielectric barrier discharge actuators using nanofoams/aerogels 有权
    使用纳米烟雾/气凝胶的坚固，灵活和轻便的电介质阻挡放电致动器

    公开(公告)号：US09137883B2

    公开(公告)日：2015-09-15

    申请号：US14287372

    申请日：2014-05-27

    申请人： National Institute of Aerospace Associates ,  The United States of America, as represented by the Administrator of the National Aeronautics and Space Administration

    发明人： Godfrey Sauti ,  Tian-Bing Xu ,  Emilie J. Siochi ,  Stephen P. Wilkinson ,  Mary Ann B. Meador ,  Haiquan N. Guo

    IPC分类号： F03H1/00 ,  H05H1/24

    CPC分类号： H05H1/2406 ,  H05H2001/2412 ,  H05H2001/2418

    摘要： Robust, flexible, lightweight, low profile enhanced performance dielectric barrier discharge actuators (plasma actuators) based on aerogels/nanofoams with controlled pore size and size distribution as well as pore shape. The plasma actuators offer high body force as well as high force to weight ratios (thrust density). The flexibility and mechanical robustness of the actuators allows them to be shaped to conform to the surface to which they are applied. Carbon nanotube (CNT) based electrodes serve to further decrease the weight and profile of the actuators while maintaining flexibility while insulating nano-inclusions in the matrix enable tailoring of the mechanical properties. Such actuators are required for flow control in aeronautics and moving machinery such as wind turbines, noise abatement in landing gear and rotary wing aircraft and other applications.

    摘要翻译： 基于具有可控孔径和尺寸分布以及孔形状的气凝胶/纳米电流的坚固，灵活，轻便，薄型增强型介质阻挡放电致动器（等离子体致动器）。 等离子执行器提供高体力以及高的重量比（推力密度）。 致动器的灵活性和机械坚固性允许它们被成形为符合它们所施加的表面。 基于碳纳米管（CNT）的电极用于进一步降低致动器的重量和轮廓，同时保持柔性，同时绝缘基体中的纳米夹杂物能够调整机械性能。 这些执行机构需要用于航空和流动机械中的流量控制，例如风力涡轮机，起落架和旋翼飞机中的噪声消除以及其他应用。

    Radiation shielding materials containing hydrogen, boron and nitrogen
    9.
    发明申请
    Radiation shielding materials containing hydrogen, boron and nitrogen 审中-公开
    含有氢，硼和氮的辐射屏蔽材料

    公开(公告)号：US20150248941A1

    公开(公告)日：2015-09-03

    申请号：US13694325

    申请日：2012-11-19

    申请人： National Institute of Aerospace Associates ,  U.S.A. as represented by the Administrator of the Administrator of the National Aeronautics and Space Administration

    发明人： Sheila A. Thibeault ,  Catharine C. Fay ,  Godfrey Sauti ,  Jin Ho Kang ,  Cheol Park

    IPC分类号： G21F1/00 ,  G21F1/10 ,  G21F1/06

    CPC分类号： G21F1/00 ,  B64G1/54 ,  G21F1/06 ,  G21F1/10 ,  G21F1/103

    摘要： The invention consists of radiation shielding materials for shielding in the most structurally robust combination against galactic cosmic radiation (GCR), neutrons, and solar energetic particles (SEP). Materials for vehicles, space structures, habitats, landers, rovers, and spacesuits must possess functional characteristics of radiation shielding, thermal protection, pressure resistance, and mechanical durability. The materials are tailored to offer the greatest shielding against GCR, neutrons, and SEP in the most structurally robust combination, also capable of shielding against micrometeoriod impact. The boron nitride nanotube (BNNT) is composed entirely of low Z atoms (boron and nitrogen). Some of the materials included in this invention are: boron nitride (BN) platelets, hot pressed BN, BNNT, BN particle containing resins, BN nanofiber containing resins, carbon fiber reinforced BN containing resins, BNNT containing resins, and hydrogenated BN and BNNT, hydrogen stored BN and BNNT, high hydrogen containing polymer or ceramic matrices, and a combination of these.

    摘要翻译： 本发明由辐射屏蔽材料组成，用于在与星系宇宙辐射（GCR），中子和太阳能能量粒子（SEP）结构上最坚固的组合中进行屏蔽。 车辆，空间结构，栖息地，着陆器，流动站和太空服的材料必须具有辐射屏蔽，热保护，耐压性和机械耐久性的功能特性。 这些材料被定制为在最结构坚固的组合中提供对GCR，中子和SEP的最大屏蔽，也能够防止微气流影响。 氮化硼纳米管（BNNT）完全由低Z原子（硼和氮）组成。 本发明中包括的一些材料是：氮化硼（BN）血小板，热压BN，BNNT，含BN颗粒的树脂，含有BN纳米纤维的树脂，含碳纤维增强BN的树脂，含BNNT的树脂和氢化BN和BNNT， 氢存储BN和BNNT，含氢高分子聚合物或陶瓷基体，以及这些的组合。