Responsive emulsions with Janus topology constructed by magneto-surfactants and remote control of emulsion stability

Q3 Materials Science JCIS open Pub Date : 2022-04-01 DOI:10.1016/j.jciso.2022.100043

Haixia Zhang , Lingling Ge , Rong Guo

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Abstract

The fluids with well-defined inner structure and intrinsic responsibility are demanding to the maintenance and regulation of normal functions in living systems. Inspired by this, responsive Janus droplets are constructed by small molecules of magneto-surfactants, and the traditional vortex mixing is applied to guarantee large-scale fabrication. Silicone oil (SO) and Vegetable oil (VO) as two immiscible oils are introduced as inner phases of the Janus emulsions. The topology and subsequently the magnetic responsive performance of Janus emulsion is controlled by adjusting the oil composition with various viscosity, the surfactant concentration and the mass ratio of two oils. Moreover, the remote control of the emulsion stability is realized by the external magnetic field, of which the demulsification mechanism is investigated. The anisotropic and responsive droplets with advantages of deformability, encapsulation capability, and biocompatibility would expand the application of emulsions in targeted therapy, drug delivery and magnetic materials science.

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磁表面活性剂构建具有Janus拓扑的响应性乳剂，并对乳剂稳定性进行远程控制

流体具有明确的内部结构和内在责任，对维持和调节生命系统的正常功能是有要求的。受此启发，反应灵敏的Janus液滴由磁表面活性剂的小分子构成，并应用传统的涡旋混合来保证大规模制造。介绍了硅油(SO)和植物油(VO)两种不混相油作为Janus乳剂的内相。通过调节不同粘度的油的组成、表面活性剂的浓度和两种油的质量比来控制Janus乳液的拓扑结构和磁响应性能。利用外加磁场实现了乳状液稳定性的远程控制，并对外加磁场的破乳机理进行了研究。具有可变形性、包封性和生物相容性等优点的各向异性和响应性微滴将扩大乳剂在靶向治疗、药物传递和磁性材料科学方面的应用。

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