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研究小组假设存在由颗粒稳定的乳液，这些乳液自发形成，并在自我调节过程中演变为单分散状态，这被解释为热力学稳定的。这些结果的确认和推广为配制不含表面活性剂的乳液开辟了广阔的领域。经过处理后，我们基本上可以证实乌得勒支小组的结果，但这种乳液出现的原因至今尚未完全清楚。仅发现另外两种油相，它们也形成类似的乳液。在由 SiO2 颗粒稳定的油/水界面处，形成可见的网络状结构。然而，这个过程并不是这种乳化的必要先决条件。 SiO2 颗粒存在时油/水界面张力的最大降低也不能提供预测此类乳液形成的可用标准。因此，未来的工作致力于找出潜在的过程，包括确定油/水界面处颗粒的结合等温线和力-距离测量。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。