Heterogeneous or competitive self-assembly of surfactants and nanoparticles at liquid–liquid interfaces

Dissipative particle dynamics studies on the interfacial tension of A/B homopolymer blends and the effect of Janus nanorods

“…As a conventional coil compatibilizer, amphiphilic surfactants and block copolymers [Figure (a,b)] were often added to the blends to achieve this aim . Recently, rigid nanoparticles have often been utilized to control the polymer structures as a strategy for tailoring the properties of the material, since the rigid nanoparticles can self‐assemble at the interface of the two phases and influence the interfacial properties. For example, Luo and coworkers investigated the effect of the nanoparticles on the water/trichloroethylene interface.…”

Enhancement of surfactant flooding performance by the use of silica nanoparticles

“…Tertiary oil recovery obtained by surfactant solutions of water-oil interfaces[35] and an increase in IFT is observed.233 Three different scenarios of surfactant adsorption on rock sur-234 face in the presence of nanoparticles were studied. Nanoparticle235 concentration was 2000 ppm in all cases.…”

Effects of organically modified nanoclay on cellular morphology, tensile properties, and dimensional stability of flexible polyurethane foams

“…In fact, upon adding the surfactant, some ALES molecules are adsorbed on the surface of the particles creating a negatively supercharged system (Table 2), through increasing the effective charge on silica surface, which creates high repulsion forces among the silica particles, hence decreasing the agglomeration of the particles. As a consequence, the probability of silica suspension enhanced and particle incorporation rate in the metal deposit is increased [38,39]. Figure 7a-c shows the size distribution of the silica particles after dispersion in the absence of a surfactant and in the presence of CTAC and ALES, respectively.…”

“…First, due to the acidity of the electrolyte (pH 4), the probability of the deprotonation of the silanol group is low and hence the negative charge of silica surface is small. In addition, upon adding a certain amount of the surfactant to the electrolyte, several kinds of cationic ions including Ni + , NH 4 + , and H + surrounded the negatively charged silica particles, and as a result, the double layer of particle decreased the repulsive electrostatic forces among the negative charges on the surface of the particles and the anionic surfactants [38,39]. According to the work of Luo et al [39], it can be said that the hydrophobic tails and hydrophilic heads of ALES molecules tend to orient, so they are closer to the silica surfaces and the surfactant molecules lay adjacent to the particles, leading a supercharged system.…”

“…In addition, upon adding a certain amount of the surfactant to the electrolyte, several kinds of cationic ions including Ni + , NH 4 + , and H + surrounded the negatively charged silica particles, and as a result, the double layer of particle decreased the repulsive electrostatic forces among the negative charges on the surface of the particles and the anionic surfactants [38,39]. According to the work of Luo et al [39], it can be said that the hydrophobic tails and hydrophilic heads of ALES molecules tend to orient, so they are closer to the silica surfaces and the surfactant molecules lay adjacent to the particles, leading a supercharged system. Second, it is possible that the adsorption process was not completely decided by the electrostatic forces and only a minor part of the interactions among the SiO 2 particles is determined by the electrostatic force, and then it is dominated by other forces such as London, van der Waals, hydrophilic and hydrophobic interaction, hydration and dehydration, and surface interaction among the surfactant and particles, known as DLVO and non-DLVO forces [40].…”