Although cyclodextrins (CDs) have been used as additives to small molecule surfactants, there are only a few examples of this cyclic oligosaccharide being used as a surfactant template. Herein, we present a novel ionic β-CD derivative that shows significant surface activity and stabilizes oil-in-water emulsions prepared with hexadecane as a model oil. The macrocyclic surfactant strongly reduces the oil–water surface tension with increasing concentration and shows a critical micelle concentration (CMC) around 5 mM. We demonstrate the stability of the oil-in-water emulsions and verify the possibility to address the emulsion droplet surface using molecular recognition of the β-CD cavity at the oil–water interface.

中文翻译：

---

环糊精表面活性剂，用于稳定的乳剂，具有可到达主体-客体络合的空腔

尽管环糊精（CDs）已用作小分子表面活性剂的添加剂，但这种环状低聚糖仅用作表面活性剂模板的例子很少。本文中，我们提出了一种新型的离子型β-CD衍生物，该衍生物具有显着的表面活性，可稳定以十六烷为模型油的水包油乳液。大环表面活性剂随着浓度的增加而强烈降低油水表面张力，并显示出约5 mM的临界胶束浓度（CMC）。我们证明了水包油型乳液的稳定性，并验证了在油水界面使用β-CD腔的分子识别来解决乳液液滴表面的可能性。