Thermodynamisch stabile Pickering-Emulsionen

乌得勒支大学的一个研究小组假设存在由粒子稳定的乳液，它们自发形成，并在自我调节过程中演变成单分散状态，这被解释为热力学稳定。这些结果的证实和推广，为制定无表面活性剂的模拟开辟了广阔的领域。经过处理，我们可以基本确认乌得勒支小组的结果，而这种乳剂出现的原因到目前为止还没有完全了解。只发现了另外两种油相，它们也形成了类似的乳剂。在由sio2颗粒稳定的油/水界面处，形成了可见的网状结构。然而，这一过程并不是这种乳化的必要先决条件。存在sio2颗粒时油水界面张力的最大下降也不能作为预测此类乳剂形成的可用标准。因此，未来的工作将致力于找出潜在的过程，包括确定结合线和油/水界面颗粒的力距测量。在这里，也将使用改性的sio2颗粒或其他颗粒，以及添加助表面活性剂和极性添加剂。

A group at the University Utrecht postulated the existence of emulsions stabilized by particles, which form spontaneously, and evolve in a self-regulating process into a monodisperse state, which is interpreted as thermodynamically stable. The confirmation and generalization of these results open up a wide field to formulate emulations free of surfactant. After processing we can principally confirm the results of the Utrecht group, whereas the reason for the appearance of this kind of emulsions is however up to now not fully understood yet. Only two other oil phases could be found, which also form similar emulsions. At the oil/water interface stabilized by SiO2-particles visible network like structures are formed. This process, however, is not an essential prerequisite for this kind of emulsification. The maximum depression of the oil/water interfacial tension in presence of SiO2-particles also does not yield a useable criterion to forecast the formation of this kind of emulsions. Therefore, future work is dedicated to find out the underlying processes including the determination of binding isotherms and force-distance measurements of particles at the oil/water interface. Here, also modified SiO2-particles or other particles will be used as well as the addition of co-surfactants and apolar additives.