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Fundamental Differences in Emulsification Principle between Three-phase Emulsification and Conventional Methods
Journal of Oleo Science ( IF 1.6 ) Pub Date : 2020-12-01 , DOI: 10.5650/jos.ess20191
Kana Miyasaka 1 , Yoko Imai 1 , Kazuo Tajima 1
Affiliation  

The present study investigates the principle difference between three-phase emulsification and conventional emulsification methods (surfactant emulsification and the Pickering method). Conventional emulsification methods depend on intensive factors such as interfacial tension and wetting. In the proposed three-phase emulsification, soft hydrophilic nanoparticles adhere to the oil-water interface due to the van der Waals attraction and stabilize the emulsion. Therefore, it can be said that three-phase emulsification is “extensive emulsification” based on the mass of the hydrophilic nanoparticles and oil droplets. Extensive emulsification is irreversible because the van der Waals attraction acts between the particles unless the mass of the soft hydrophilic nanoparticles and oil droplets changes. The differences between three-phase emulsification and conventional emulsification methods were experimentally verified by comparing the difference in the stability of the emulsions resulting from the change in intensive factors, where the internal phase oil transitioned from solid to liquid. The emulsions prepared using the surfactant and Pickering methods were separated into oil and water by the solid-liquid phase transition of hexadecane in the internal oil phase. However, the emulsion prepared using three-phase emulsification maintained its emulsified state without any oil-water separation even when the internal oil phase underwent solid-liquid phase transition. From the results obtained, it can be concluded that three-phase emulsification is an irreversible method because its mechanism is based on extensive factors. Furthermore, this irreversible method allows the emulsification of various oils that cannot be emulsified by conventional methods, and it is also possible to directly mix emulsions prepared with different oils. The authors also call attention to the possibility of improving emulsion characters and new developments in emulsion science.

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中文翻译:

三相乳化与常规方法在乳化原理上的根本区别

本研究探讨了三相乳化与常规乳化方法(表面活性剂乳化和Pickering方法)之间的原理差异。常规的乳化方法取决于强度因素,例如界面张力和润湿性。在提出的三相乳化过程中,由于范德华力的吸引,柔软的亲水性纳米颗粒粘附在油水界面上并稳定了乳液。因此,可以说,基于亲水性纳米颗粒和油滴的质量,三相乳化是“广泛乳化”。广泛的乳化是不可逆的,因为除非柔软的亲水性纳米颗粒和油滴的质量发生变化,否则范德华力在颗粒之间起作用。三相乳化法与常规乳化法之间的差异通过比较由强化因子变化引起的乳化液稳定性的差异进行了实验验证,其中内相油从固态转变为液态。使用表面活性剂和Pickering方法制备的乳液通过十六烷在内部油相中的固液相转变而分离为油和水。然而,即使当内部油相经历固-液相转变时,使用三相乳化制备的乳液也保持其乳化状态而没有任何油水分离。从获得的结果可以得出结论,三相乳化是不可逆的方法,因为其机理是基于广泛的因素。此外,该不可逆方法允许乳化各种常规方法不能乳化的油,并且还可以直接混合用不同油制备的乳剂。作者还呼吁关注改善乳液特性的可能性以及乳液科学的新发展。

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更新日期:2020-12-28
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