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241022s2024 xx |||||o 00| ||eng c |
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|a 10.1021/acs.langmuir.4c02458
|2 doi
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|a pubmed25n1263.xml
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|a DE-627
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| 041 |
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|a eng
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| 100 |
1 |
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|a He, Xiujuan
|e verfasserin
|4 aut
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| 245 |
1 |
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|a Impact of the Hydrophobic Phase on the Interfacial Dilational Rheology of Alkoxy Carboxylate/Cetyltrimethyl Ammonium Chloride Mixtures
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|c 2024
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|a Text
|b txt
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|a ƒaComputermedien
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|a ƒa Online-Ressource
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|a Date Revised 22.10.2024
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a Despite extensive investigations on the interfacial activities of mixed anionic and cationic surfactants (Sa/c), the influence of the hydrophobic phase on their interfacial assembly and dilational rheology remains unaddressed. In this study, the interfacial dilational rheology of alkoxy carboxylate (anionic)/cetyltrimethylammonium chloride (cationic) surfactant mixtures was studied at various interfaces. The dilational modulus of Sa/c increases linearly with interfacial pressure at the interfaces of air, n-hexane/n-octane/n-hexadecane, and toluene. The limit elasticity (ε0) is similar at air and alkane interfaces but significantly decreases at the toluene interface. To explain these phenomena, all-atom molecular simulation was carried out to investigate the microscopic features of surfactants at the interface. The findings emphasize the crucial role of anionic/cationic surfactant bound pairs in regulating interfacial rheology. Sa/c tend to form large aggregates at the air/water surface. When mixed with alkanes like octane, most Sa/c remain as ion pairs. However, when toluene is employed, the coordination number between anionic and cationic surfactants sharply decreases due to π-π interactions between the toluene molecules and the phenyl groups in the anionic surfactant. This leads to a much lower interfacial modulus because interactions between oil molecules and surfactants cannot compensate for weakened interactions among anionic/cationic surfactants. These results suggest that Sa/c in this study tolerate alkanes but are not resistant to aromatics, which helps explain why Sa/c demonstrate excellent performance for the chemical enhanced oil recovery of a high-wax reservoir and further provides fundamental knowledge of their potential applications, such as gas well deliquification using foamers in the presence of condensate oil, textiles, etc
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|a Journal Article
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1 |
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|a Su, Zhiqing
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Liu, Wei
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Jin, Jun
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Qiu, Jun
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Cui, Leyu
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Li, Yingcheng
|e verfasserin
|4 aut
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| 773 |
0 |
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|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1985
|g 40(2024), 42 vom: 22. Okt., Seite 22098-22107
|w (DE-627)NLM098181009
|x 1520-5827
|7 nnas
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| 773 |
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|g volume:40
|g year:2024
|g number:42
|g day:22
|g month:10
|g pages:22098-22107
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| 856 |
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|u http://dx.doi.org/10.1021/acs.langmuir.4c02458
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