Thermodynamisch stabile Pickering-Emulsionen

热力学稳定的 Pickering 乳液

• 批准号: 140843930
• 负责人: Dr. Rainer Wüstneck
• 金额: --
• 依托单位: Max-Planck-Institut für Kolloid- und Grenzflächenforschung
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2009
• 资助国家: 德国
• 起止时间: 2008-12-31 至 2014-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/140843930?language=en
• 关键词: Thermodynamisch; stabile; Pickering; Emulsionen

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.

乌得勒支大学的一个小组假设存在由颗粒稳定的乳液，这些颗粒自发形成，并在自我调节过程中演变成单分散状态，这被解释为化学稳定。这些结果的证实和推广为配制无表面活性剂的乳液开辟了广阔的领域。经过处理后，我们基本上可以确认Utrecht小组的结果，然而，这种乳液出现的原因至今尚未完全了解。只有两个其他的油相可以发现，也形成类似的乳液。在被SiO2颗粒稳定的油/水界面处形成了可见的网络状结构。然而，这个过程不是这种乳化的必要先决条件。在SiO2颗粒存在下的油/水界面张力的最大抑制也没有产生预测这种乳液形成的可用标准。因此，未来的工作是致力于找出潜在的过程，包括确定的结合等温线和力距离测量的颗粒在油/水界面。这里，还将使用改性的SiO2颗粒或其他颗粒以及添加助表面活性剂和非极性添加剂。