What stabilize the foam made from surfactants?
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Surfactants play a crucial role in stabilizing foams by adsorbing at bubble surfaces, hindering coarsening and coalescence, and forming crystals that slow down drainage, leading to ultrastable foams . The stability of foams can be enhanced by using surfactant mixtures, where the mixing ratio significantly impacts foam stabilization, resulting in longer foam-life and higher apparent viscosity . Additionally, the design of next-generation surfactants, such as triethylsilyl-containing surfactants, influences critical micelle concentration, surface tension, and foam stability, with molecular dynamics simulations linking decreased surface tension to larger interfacial areas per molecule . Furthermore, the optimal formulation of nitrogen-foam using surfactants like fluorocarbon tubiguard protect (FTP) stabilized with sodium dodecyl sulfate (SDS) can change rock wettability and enhance oil recovery by diverting gas flow from fractures to matrix blocks, showcasing the importance of foam stability in oil recovery processes .
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| Papers (5) | Insight |
|---|---|
| Fluorinated zwitterionic and hydrocarbon zwitterionic surfactants stabilize foam by enhancing foamability and stability, crucial for applications like enhanced oil recovery in challenging environments. | |
21 Citations | Surfactant crystals stabilize foams by adsorbing at bubble surfaces, hindering coarsening and coalescence, and preventing drainage between bubbles, leading to ultrastable aqueous and oil foams. |
| The foam stability is achieved by using a combination of fluorocarbon tubiguard protect (FTP) surfactant and sodium dodecyl sulfate (SDS) co-surfactant in a 5:1 volume ratio (FS51). | |
07 Mar 2023 | Surfactant mixtures, particularly combining anionic and amphoteric surfactants, enhance foam stability by increasing foam-life and apparent viscosity, resulting in stronger and more stable foams. |
| The hydrophilic head group of cationic and zwitterionic triethylsilyl-containing surfactants influences foam stability by affecting surface tension and viscoelastic properties, enhancing foam stability in fire-fighting applications. |
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