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    • 4. 发明申请
    • METHOD FOR PREPARING A MONODISPERSED DOUBLE EMULSION
    • 制备单一乳液的方法
    • WO0185319A9
    • 2008-10-02
    • PCT/FR0101397
    • 2001-05-09
    • CENTRE NAT RECH SCIENTLEAL CALDERON FERNANDOGORRIA PHILIPPEBIBETTE JEROME
    • LEAL CALDERON FERNANDOGORRIA PHILIPPEBIBETTE JEROME
    • B01F3/08B01F9/10
    • B01F9/103B01F3/0811B01F3/0819B01F3/0853
    • The invention concerns a method for preparing a monodispersed double water/oil/water emulsion, characterised in that it consists in: a) subjecting a polydispersed oil-in-water emulsion Ei comprising 55 to 99 wt. % of an aqueous phase, to a controlled shearing so that a common maximum shearing is applied to the entire emulsion, so as to obtain the corresponding monodispersed invert emulsion; b) adding to said emulsion, without phase inversion, the necessary amount of diluting oil phase so that the aqueous phase of the resulting emulsion represents at least 50 wt. % of the emulsion total weight; and c) introducing the resulting emulsion into a high pressure homogenizer, together with a continuous aqueous phase, the respective amounts of said emulsion and said continuous aqueous phase being such that the resulting double emulsion comprises up to 50 wt. % of invert emulsion droplets relative to the emulsion total weight, said continuous aqueous phase comprising a hydrophilic surfactant concentration not more that 0.02 times the critical micellar concentration.
    • 本发明涉及一种制备单分散双水/油/水乳液的方法,其特征在于:其包括:a)将多分散的水包油乳液Ei进行包含55至99wt。 %的水相,进行受控的剪切,使得对整个乳液施加共同的最大剪切,以获得相应的单分散的反相乳液; b)在没有相转化的情况下向所述乳液中加入所需量的稀释油相,使得所得乳液的水相至少为50重量%。 乳液总重量的百分比; 和c)将所得乳液与连续水相一起引入高压均化器中,所述乳液和所述连续水相的相应量使得所得双重乳液包含至多50重量% 相对于乳液总重量的反相乳液液滴的百分比,所述连续水相包含亲水性表面活性剂浓度不超过临界胶束浓度的0.02倍。
    • 5. 发明申请
    • FERROFLUID EMULSIONS, PARTICLES, AND SYSTEMS AND METHODS FOR MAKING AND USING THE SAME
    • FERROFLUID乳液,颗粒和用于制造和使用其的系统和方法
    • WO2009029229A3
    • 2009-04-16
    • PCT/US2008010020
    • 2008-08-22
    • HARVARD COLLEGESANTANACH CARRERAS ENRICBIBETTE JEROMEWEITZ DAVID A
    • SANTANACH CARRERAS ENRICBIBETTE JEROMEWEITZ DAVID A
    • B01J13/04
    • B01F3/0807B01F13/0062B01J2219/005
    • The present invention generally relates to ferrofluid emulsions and/or magnetically susceptible particles. In some cases, such emulsions and particles can be produced in a microfluidic system. In one aspect, an emulsion containing a ferrofluid can be produced, and in certain cases, the emulsion is substantially monodisperse. In some embodiments, the emulsion also contains a precursor that can be solidified, for example, a polymer precursor. The emulsion may also contain an emulsion stabilizing agent and/or a viscous agent. In another aspect of the present invention, the ferrofluid emulsion may be hardened to form particles, for example, by removing a fluid from the emulsion and/or by solidifying a precursor, such as a polymer precursor, around the emulsion. For example, the ferrofluid may be formed from an organic solvent containing nanoparticles, and the organic solvent removed such that the nanoparticles form magnetically susceptible particles. The particles may also be further manipulated, for example, using a magnet. For instance, in one set of embodiments, the particles may be moved from one fluid stream to another fluid stream using the magnet, for example, for further processing, reaction, analysis, etc., of the particles. In some cases, the particles may be formed "on demand," e.g., for a variety of different applications.
    • 本发明一般涉及铁磁流体乳液和/或磁敏颗粒。 在一些情况下,这种乳液和颗粒可以在微流体系统中生产。 一方面,可以生产含有铁磁流体的乳液,并且在某些情况下,乳液基本上是单分散的。 在一些实施方案中,乳液还含有可以固化的前体,例如聚合物前体。 该乳液还可以含有乳液稳定剂和/或粘稠剂。 在本发明的另一个方面中,例如通过从乳液中除去流体和/或通过在乳液周围固化前体如聚合物前体,铁磁流体乳液可以被硬化以形成颗粒。 例如,铁磁流体可以由含有纳米颗粒的有机溶剂形成,并且去除有机溶剂使得纳米颗粒形成磁敏颗粒。 例如,还可以使用磁体来进一步处理颗粒。 例如,在一组实施例中,可以使用磁体将颗粒从一个流体流移动到另一个流体流,例如用于颗粒的进一步处理,反应,分析等。 在一些情况下,颗粒可以“按需”形成,例如用于各种不同的应用。