Self-crosslinked admicelle of sodium conjugated linoleate@nano-CaCO3 and its stimuli–response to Ca2+/pH/CO2 triple triggers

Smart Droplets Stabilized by Designer Surfactants: From Biomimicry to Active Motion to Materials Healing

“…Figure 29. [162][163][164][165][166][167] Transitional inversion is achieved via the response of the surfactant and/or fluid phases to an applied stimulus such as a change in pH, [168][169][170][171][172][173][174][175] electrolyte composition, [174][175][176][177][178][179] temperature, [169,[180][181][182][183][184] or wavelength of light. [173,[185][186][187][188][189] For example, temperature-induced emulsion inversion can pinpoint a phase-inversion temperature (PIT), while inversion resulting from other stimuli reveals a phase-inversion composition (PIC).…”

“…The stimulus-response associated with transitional inversion lends itself to reversibility, with natural outlets in targeted delivery and controlled release. [165,169,175,[190][191][192] Distinct from such processes are catastrophic inversion methods, or emulsion phase inversion (EPI), which are the end result of altering the fluid composition (i.e., the oil:water ratio) of the system. EPI is dis-tinguished by sudden changes in emulsion properties, such as viscosity or conductivity, at the inversion point.…”

“…Emulsion inversion triggered by pH can also be achieved by introducing CO 2(g) into the pre-formed emulsions to produce carbonic acid, [175,188,191,193] an attractive method for the inherent lack of by-products and easy removal (e.g., by purging with inert gas). Recent results of Shi et al described Pickering emulsion inversion using CO 2(g) /N 2(g) cycling (Figure 33) [191] in systems stabilized by 200 nm diameter SiO 2 particles coated with a mixture of n-octyl and hydroxyethyl amine groups.…”

“…Combining several of the emulsion triggers discussed above allows one to generate multi-responsive emulsion inversion systems. [169,[173][174][175]188] For example, Cao et al studied Pickering emulsion inversion that was driven by combining CO 2(g) with light. [188] As shown in Figure 34, using emulsions stabilized by polydopamine (PDA) particles coated with poly[diethylamino)ethyl methacrylate] (PDEAEMA), the anticipated W/O to O/W inversion cycle was produced as a result of amine protonation after the introduction of CO 2(g) .…”

Controllable Regulation of Diesel Oil-in-Water Pickering Emulsion Stability by Multiresponsive Recyclable Magnetic Polymer Brush Microvessels

“…24 San and co-workers reported that ASCL@ CaCO 3 was prepared by immobilizing sodium-conjugated linoleate (ASCL) on the surface of CaCO 3 nanoparticles to stabilize liquid paraffin emulsions as particle emulsifiers and investigated the stimulus response behavior of the emulsions under the triple trigger of Ca 2+ /pH/CO 2 . 25 These studies showed that it was not difficult to obtain stable, W/O type environmentally responsive Pickering emulsions by emulsifying the oil with nanoscale particles, but there are few reports on the growth of density and thickness controllable organic polymers on the surface of inorganic materials. In addition, the preparation of nanocomposites with recoverability and versatility for stabilizing fuel oil and recovering fuel oil products of the required quality after rapid demulsification has been less reported.…”