Interfacial properties of a siliconecopolymer demulsifier at the air/water interface

Literature Information

Publication Date 2004-01-23
DOI 10.1039/B314301P
Impact Factor 3.676
Authors

Delphine Daniel-David, Isabelle Pezron, Danièle Clausse, Christine Dalmazzone, Christine Noik, Ljepsa Komunjer


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Abstract

Crude oil/water emulsion stability is one of the major obstacles to efficient off-shore separation of undesired aqueous phase. Chemical demulsifiers based on polysiloxanes have been successfully tested as accelerators of phase separation but the mechanism of coalescence is not fully understood. Better understanding of interfacial properties in the presence of demulsifier should give better insight in their mode of action. Comprehensive study of the interfacial properties of small water-soluble PEO–(PDMS)–PEO triblock copolymer is presented in this paper. Insoluble monolayers are formed by deposition of dissolved polymer at the air/water interface but also by adsorption from aqueous solution of the polymer. High affinity of the polymer molecule for the interface i.e. too high the energy needed to remove the molecules from the interface is at the origin of such behaviour. The elastic moduli are function of the surface pressure in the film and are very similar in both Gibbs and Langmuir monolayers.

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Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics
CiteScore: 5.5
Self-citation Rate: 10.3%
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Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.

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