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- W2002513910 abstract "The lowering of the interfacial tension (γ) between water and carbon dioxide by various classes of surfactants is reported and used to interpret complementary measurements of the capacity, stability, and average drop size of water-in-CO2 emulsions. γ is lowered from ∼20 to ∼2 mN/m for the best poly(propylene oxide)-b-poly(ethylene oxide)-b-poly(propylene oxide) (PPO-b-PEO-b-PPO) and PEO-b-PPO-b-PEO Pluronic triblock copolymers, 1.4 mN/m for a poly(butylene oxide)-b-PEO copolymer, 0.8 mN/m for a perfluoropolyether (PFPE) ammonium carboxylate and 0.2 mN/m for PDMS24-g-EO22. The hydrophilic−CO2-philic balance (HCB) of the triblock Pluronic and PDMS-g-PEO−PPO surfactants is characterized by the CO2-to-water distribution coefficient and “V-shaped” plots of log γ vs wt % EO. A minimum in γ is observed for the optimum HCB. As the CO2-philicity of the surfactant tail is increased, the molecular weight of the hydrophilic segment increases for an optimum HCB. The stronger interactions on both sides of the interface lead to a lower γ. Consequently, more water was emulsified for the PDMS-based copolymers than either the PPO- or PBO-based copolymers." @default.
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- W2002513910 date "1998-12-29" @default.
- W2002513910 modified "2023-10-04" @default.
- W2002513910 title "Effect of Surfactants on the Interfacial Tension and Emulsion Formation between Water and Carbon Dioxide" @default.
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- W2002513910 doi "https://doi.org/10.1021/la980844k" @default.
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