Reconfigurable Pickering Emulsions with Functionalized Carbon Nanotubes
Reconfigurable Pickering Emulsions with Functionalized Carbon Nanotubes
复制标题
具有功能化碳纳米管的可重构皮克林乳液
DOI：
10.1021/acs.langmuir.1c00904
复制
发表时间：
2021
期刊：
影响因子：
3.9
通讯作者：
Swager, Timothy M.
中科院分区：
文献类型：
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作者：
Ngo, Quynh P.;He, Maggie;Concellón, Alberto;Yoshinaga, Kosuke;Luo, Shao-Xiong Lennon;Aljabri, Nouf;Swager, Timothy M.
Pickering乳液（PE）通过胶体颗粒表面活性剂实现界面稳定，并且通常用于食品、化妆品和药品中。碳纳米管（CNT）最近已被用作稳定材料以产生动态单乳液。在这项研究中，我们使用功能化的碳纳米管上的迈森海默复合物的形成，以制造复杂的两相乳液含有烃（HC）和碳氟化合物（FC）。Meisenheimer络合物形成的可逆性质允许在液滴-水界面处进一步官能化。利用荧光染料苝酰亚胺（F-PBI）对碳纳米管的强亲和力，增强了碳纳米管在FC-水界面的组装。不同浓度的官能化CNT和pelene添加剂的组合使得能够实现可预测的复杂乳液形态。可逆的形态重构与分子表面活性剂的加入进行了探索。我们的研究结果表明，功能化的碳纳米管的界面性能在复杂的动态乳液的制造中具有相当大的实用性。
Pickering emulsions (PEs) achieve interfacial stabilization by colloidal particle surfactants and are commonly used in food, cosmetics, and pharmaceuticals. Carbon nanotubes (CNTs) have recently been used as stabilizing materials to create dynamic single emulsions. In this study, we used the formation of Meisenheimer complexes on functionalized CNTs to fabricate complex biphasic emulsions containing hydrocarbons (HCs) and fluorocarbons (FCs). The reversible nature of Meisenheimer complex formation allows for further functionalization at the droplet–water interface. The strong affinity of fluorofluorescent perylene bisimide (F-PBI) to the CNTs was used to enhance the assembly of CNTs on the FC–water interface. The combination of different concentrations of the functionalized CNTs and the pelene additive enables predictable complex emulsion morphologies. Reversible morphology reconfiguration was explored with the addition of molecular surfactants. Our results show that the interfacial properties of functionalized CNTs have considerable utility in the fabrication of complex dynamic emulsions.