Ren Gaihuan, Li Zhanzhao, Lu Dongxu, Li Bo, Ren Lulu, Di Wenwen, Yu Hongqin, He Jianxin, Sun Dejun
Textile and Garment Industry of Research Institute, Zhongyuan University of Technology, Zhengzhou 450007, China.
School of Mechanical and Electrical Engineering, Zhengzhou University of Industrial Technology, Zhengzhou 450007, China.
Nanomaterials (Basel). 2022 Jul 28;12(15):2587. doi: 10.3390/nano12152587.
Herein, we describe pH and magnetism dual-responsive liquid paraffin-in-water Pickering emulsion stabilized by dynamic covalent FeO (DC-FeO) nanoparticles. On one hand, the Pickerinfigureg emulsions are sensitive to pH variations, and efficient demulsification can be achieved by regulating the pH between 10 and 2 within 30 min. The dynamic imine bond in DC-FeO can be reversibly formed and decomposed, resulting in a pH-controlled amphiphilicity. The Pickering emulsion can be reversibly switched between stable and unstable states by pH at least three times. On the other hand, the magnetic FeO core of DC-FeO allowed rapid separation of the oil droplets from Pickering emulsions under an external magnetic field within 40 s, which was a good extraction system for purifying the aqueous solution contaminated by rhodamine B. The dual responsiveness enables Pickering emulsions to have better control of their stability and to be applied more broadly.
在此，我们描述了由动态共价FeO（DC-FeO）纳米颗粒稳定的pH和磁性双响应水包液状石蜡Pickering乳液。一方面，Pickering乳液对pH变化敏感，通过在30分钟内将pH调节在10至2之间可实现高效破乳。DC-FeO中的动态亚胺键可可逆地形成和分解，从而实现pH控制的两亲性。Pickering乳液可通过pH至少三次在稳定和不稳定状态之间可逆切换。另一方面，DC-FeO的磁性FeO核使得在外部磁场下40秒内油滴能从Pickering乳液中快速分离，这是用于净化被罗丹明B污染的水溶液的良好萃取系统。这种双响应性使Pickering乳液能更好地控制其稳定性并得到更广泛的应用。
