Construction, modulation and transition of light responsive oil-in-water novel emulsions stabilized by similarly charged nanoparticles and dye molecules

Recent Progress toward Physical Stimuli‐Responsive Emulsions

“…[5] Unlike the photodegradation of the chain grafted onto the surface of TiO 2 particles in the above literature, Sun et al proposed a method that TiO 2 particles photocatalyzed degradation of water/oil interface stabilizer upon UV light irradiation to demulsify the emulsion. [51] Xie et al prepared microreactors by utilizing UV light to destable a pair of emulsion droplets derived from increased hydrophilicity of TiO 2 surface. [47] Besides, photosensitive molecule functionalized particles were synthesized to endow emulsions' light-responsive property.…”

“…)-functionalized molecular surfactant or particles (Table 2). [1,3,5,[7][8][9][22][23][24][41][42][43][44][45][46][47][48][49][50][51] As a popular photoisomerization group used to endow photosensitivity to molecule, the azobenzene group can be switched from trans isomer to cis isomer when subjected to UV irradiation, and be converted to trans isomer upon visible light (Figure 5a). [52] By incorporating azobenzene group into surfactant, the emulsions stabilized by the above surfactant would exhibit light-induced behavior, including demulsification and change of droplets morphology.…”

“…In addition to make use of the photoisomerization properties of azobenzene groups, photoresponsive emulsifiers were prepared utilizing photocatalyst TiO 2 nanoparticles [5,9,47,51] or nanoparticles functionalized by photosensitive molecule chains. [3,50] TiO 2 nanoparticles are known to be a common UV photocatalyst.…”

Multi-responsive Pickering emulsifiers: a comprehensive study on the emulsification–demulsification behavior of modified chitosan-coated Fe3O4 nanocomposites

“…5 Fortunately, modifying stimulus-responsive groups on NPs enables emulsification and demulsification processes upon stimulation, which effectively addresses the aforementioned issues. 6,7 Currently, several types of stimulus-responsive emulsifiers have been reported, including pH-responsive, [8][9][10] temperature-responsive, [11][12][13] CO 2 -responsive, [14][15][16] light-responsive, 17,18 mechanical-responsive, 19 magnetic-responsive, [20][21][22] REDOX-responsive 23,24 and multi-responsive. Among them, magnetic responsive emulsions have garnered widespread attention due to their advantages of low toxicity, simple operation, fast response speed, high reusability, and excellent controllability.…”

Design of Proanthocyanidins and TiO2 Nanoparticles‐Based Novel Emulsions as a Platform for UV Protection

“…In addition, our group also prepared a light responsive novel emulsion stabilized by similarly charged TiO 2 nanoparticles in combination with rhodamine B molecules at low concentration. [7] As we all know, the conventional and Pickering emulsions have been widely used in food, medicine and cosmetics fields. [8] In comparison with the traditional and Pickering emulsions, the concentration of surfactant and solid particles required in novel emulsions is significantly decreased, which indicted a greater advantage in terms of economy and environment for practical applications.…”