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23 条记录 (耗时 0.044 秒)

    Systems and methods of forming particles
    6.
    发明申请
    Systems and methods of forming particles 审中-公开
    形成颗粒的系统和方法

    公开(公告)号：US20070054119A1

    公开(公告)日：2007-03-08

    申请号：US11368263

    申请日：2006-03-03

    申请人： Piotr Garstecki ,  Douglas Weibel ,  Irina Gitlin ,  Shoji Takeuchi ,  Shengqing Xu ,  Zhihong Nie ,  Min Seo ,  Patrick Lewis ,  Eugenia Kumacheva ,  Howard Stone ,  George Whitesides

    发明人： Piotr Garstecki ,  Douglas Weibel ,  Irina Gitlin ,  Shoji Takeuchi ,  Shengqing Xu ,  Zhihong Nie ,  Min Seo ,  Patrick Lewis ,  Eugenia Kumacheva ,  Howard Stone ,  George Whitesides

    IPC分类号： B32B1/00

    CPC分类号： B01J19/0093 ,  B01F3/0807 ,  B01F13/0062 ,  B01J19/06 ,  B01J2219/00873 ,  B22F1/0007 ,  B22F9/06 ,  Y10T428/2982

    摘要： The present invention generally relates to systems and methods of forming particles and, in certain aspects, to systems and methods of forming particles that are substantially monodisperse. Microfluidic systems and techniques for forming such particles are provided, for instance, particles may be formed using gellation, solidification, and/or chemical reactions such as cross-linking, polymerization, and/or interfacial polymerization reactions. In one aspect, the present invention is directed to a plurality of particles having an average dimension of less than about 500 micrometers and a distribution of dimensions such that no more than about 5% of the particles have a dimension greater than about 10% of the average dimension, which can be made via microfluidic systems. In one set of embodiments, at least some of the particles may comprise a metal, and in certain embodiments, at least some of the particles may comprise a magnetizable material. In another set of embodiments, at least some of the particles may be porous. In some embodiments, the invention includes non-spherical particles. Non-spherical particles may be formed, for example, by urging a fluidic droplet into a channel having a smallest dimension that is smaller than the diameter of a perfect mathematical sphere having a volume of the droplet, and solidifying the droplet, and/or by exposing at least a portion of a plurality of particles to an agent able to remove at least a portion of the particles.

    摘要翻译： 本发明一般涉及形成颗粒的系统和方法，并且在某些方面涉及形成基本上单分散的颗粒的体系和方法。 提供了用于形成这种颗粒的微流体系统和技术，例如，可以使用凝胶化，固化和/或化学反应如交联，聚合和/或界面聚合反应形成颗粒。 在一个方面，本发明涉及平均尺寸小于约500微米的多个颗粒和尺寸分布，使得不超过约5％的颗粒具有大于所述颗粒的约10％的尺寸 平均尺寸，可以通过微流体系统进行。 在一组实施方案中，至少一些颗粒可以包含金属，并且在某些实施方案中，至少一些颗粒可以包含可磁化材料。 在另一组实施方案中，至少一些颗粒可以是多孔的。 在一些实施方案中，本发明包括非球形颗粒。 非球形颗粒可以例如通过将流体液滴推入具有小于具有液滴体积的完美数学球体的直径的最小尺寸的通道，和/或通过 将多个颗粒的至少一部分暴露于能除去至少一部分颗粒的试剂。

    Polymeric nanocomposite materials with a functional matrix and method of reading and writing thereto
    7.
    发明授权
    Polymeric nanocomposite materials with a functional matrix and method of reading and writing thereto 失效
    具有功能矩阵的聚合纳米复合材料及其读取和写入方法

    公开(公告)号：US06785214B2

    公开(公告)日：2004-08-31

    申请号：US09726487

    申请日：2000-12-01

    申请人： Eugenia Kumacheva ,  Olga Kalinina

    发明人： Eugenia Kumacheva ,  Olga Kalinina

    IPC分类号： G11B700

    CPC分类号： B01J13/02 ,  B01J13/18 ,  G03F7/0005 ,  G03F7/002 ,  G11B7/00455 ,  G11B7/0052

    摘要： A nanocomposite material having a plurality of core particles formed of a core material. The core material has a first glass transition temperature. A shell encapsulates each core particle. The shell is formed of a shell material that has a second glass transition temperature less than the first glass transition temperature. When subjected to a temperature greater than the second glass transition temperature and less than the first glass transition temperature, the shells form a continuous matrix surrounding the core particles. The shell material includes a functional component that can be activated in response to an external excitation. This functional component can include either photosensitive, semiconductor, magnetic, piezoelectric or electro-active components just to mention a few. The different components may be chemically or physically bound to the shell or cores. These nanocomposite materials are used as storage media.

    摘要翻译： 一种纳米复合材料，其具有由核心材料形成的多个核心颗粒。 芯材料具有第一玻璃化转变温度。 壳体封装每个核心粒子。 外壳由壳材料形成，其具有小于第一玻璃化转变温度的第二玻璃化转变温度。 当受到大于第二玻璃化转变温度且小于第一玻璃化转变温度的温度时，壳形成围绕芯颗粒的连续基体。 外壳材料包括可以响应于外部激发而被激活的功能部件。 该功能组件可以包括光敏，半导体，磁性，压电或电活性组分，仅仅是提及一些。 不同的组分可以化学或物理地结合到壳或核。 这些纳米复合材料用作储存介质。

    Method of producing hybrid polymer-inorganic materials
    9.
    发明申请
    Method of producing hybrid polymer-inorganic materials 有权
    混合聚合物 - 无机材料的制备方法

    公开(公告)号：US20060257485A1

    公开(公告)日：2006-11-16

    申请号：US10548414

    申请日：2004-03-10

    申请人： Eugenia Kumacheva

    发明人： Eugenia Kumacheva

    IPC分类号： A61K9/14 ,  C08K3/22

    CPC分类号： C08G83/001 ,  B82Y30/00 ,  C08J5/005

    摘要： The present invention describes a new approach to producing hybrid composite materials with multiscale morphologies. We doped polymer submicrometer spheres with semiconductor or metal (e.g. CdS or Ag, respectively) nanoparticles and used these doped microspheres as the functional building blocks in production of hybrid periodically structured materials. The preparation of hybrid polymer particles included the following stages: (i) synthesis of monodisperse polymer microspheres, (ii) in-situ synthesis of the inorganic nanoparticles either on the surface, or in the bulk of the polymer beads, and (iii) encapsulation of hybrid microspheres with a hydrophobic shell. We demonstrated that by changing the composition of the polymer beads good control could be achieved over the size of the nanoparticles.

    摘要翻译： 本发明描述了生产具有多尺度形态的混合复合材料的新方法。 我们用半导体或金属（例如分别为CdS或Ag）纳米颗粒掺杂聚合物亚微米球，并将这些掺杂的微球用作生产混合周期性结构材料的功能性结构单元。 混合聚合物颗粒的制备包括以下阶段：（i）合成单分散聚合物微球体，（ii）在表面或大部分聚合物珠粒中原位合成无机纳米颗粒，和（iii）包封 具有疏水壳的杂交微球。 我们证明通过改变聚合物珠粒的组成，可以在纳米粒子的尺寸上实现良好的控制。