date: 2018-11-02T10:37:52Z pdf:PDFVersion: 1.5 pdf:docinfo:title: Dynamic Properties of Mixed Cationic/Nonionic Adsorbed Layers at the N-Hexane/Water Interface: Capillary Pressure Experiments Under Low Gravity Conditions xmp:CreatorTool: LaTeX with hyperref package access_permission:can_print_degraded: true subject: Capillary pressure experiments are performed in microgravity conditions on board the International Space Station to quantify the dynamic interfacial behavior of mixed adsorption layers of TTAB and C13DMPO at the water/hexane interface. While the non-ionic surfactant C13DMPO is soluble in both bulk phases, water and hexane, the cationic surfactant TTAB is only soluble in the aqueous phase. The interfacial layer is thus formed by TTAB molecules adsorbing from the aqueous phase while the C13DMPO molecules adsorb from the aqueous phase, and transfer partially into the hexane phase until both the equilibrium of adsorption and the distribution between the two adjacent liquid phases is established. The experimental constrains as well as all possible influencing parameters, such as interfacial and bulk phase compressibility, interfacial curvature, calibration of pressure and absolute geometry size, are discussed in detail. The experimental results in terms of the dilational interfacial viscoelasticity of the mixed adsorption layers in a wide range of oscillation frequencies show that the existing theoretical background had to be extended in order to consider the effect of transfer of the non-ionic surfactant across the interface, and the curvature of the water/hexane interface. A good qualitative agreement between theory and experiment was obtained, however, for a quantitative comparison, additional accurate information on the adsorption isotherms and diffusion coefficients of the two studied surfactants in water and hexane, alone and in a mixed system, are required. dc:format: application/pdf; version=1.5 pdf:docinfo:creator_tool: LaTeX with hyperref package access_permission:fill_in_form: true pdf:encrypted: false dc:title: Dynamic Properties of Mixed Cationic/Nonionic Adsorbed Layers at the N-Hexane/Water Interface: Capillary Pressure Experiments Under Low Gravity Conditions modified: 2018-11-02T10:37:52Z cp:subject: Capillary pressure experiments are performed in microgravity conditions on board the International Space Station to quantify the dynamic interfacial behavior of mixed adsorption layers of TTAB and C13DMPO at the water/hexane interface. While the non-ionic surfactant C13DMPO is soluble in both bulk phases, water and hexane, the cationic surfactant TTAB is only soluble in the aqueous phase. The interfacial layer is thus formed by TTAB molecules adsorbing from the aqueous phase while the C13DMPO molecules adsorb from the aqueous phase, and transfer partially into the hexane phase until both the equilibrium of adsorption and the distribution between the two adjacent liquid phases is established. The experimental constrains as well as all possible influencing parameters, such as interfacial and bulk phase compressibility, interfacial curvature, calibration of pressure and absolute geometry size, are discussed in detail. The experimental results in terms of the dilational interfacial viscoelasticity of the mixed adsorption layers in a wide range of oscillation frequencies show that the existing theoretical background had to be extended in order to consider the effect of transfer of the non-ionic surfactant across the interface, and the curvature of the water/hexane interface. A good qualitative agreement between theory and experiment was obtained, however, for a quantitative comparison, additional accurate information on the adsorption isotherms and diffusion coefficients of the two studied surfactants in water and hexane, alone and in a mixed system, are required. pdf:docinfo:subject: Capillary pressure experiments are performed in microgravity conditions on board the International Space Station to quantify the dynamic interfacial behavior of mixed adsorption layers of TTAB and C13DMPO at the water/hexane interface. While the non-ionic surfactant C13DMPO is soluble in both bulk phases, water and hexane, the cationic surfactant TTAB is only soluble in the aqueous phase. The interfacial layer is thus formed by TTAB molecules adsorbing from the aqueous phase while the C13DMPO molecules adsorb from the aqueous phase, and transfer partially into the hexane phase until both the equilibrium of adsorption and the distribution between the two adjacent liquid phases is established. The experimental constrains as well as all possible influencing parameters, such as interfacial and bulk phase compressibility, interfacial curvature, calibration of pressure and absolute geometry size, are discussed in detail. The experimental results in terms of the dilational interfacial viscoelasticity of the mixed adsorption layers in a wide range of oscillation frequencies show that the existing theoretical background had to be extended in order to consider the effect of transfer of the non-ionic surfactant across the interface, and the curvature of the water/hexane interface. A good qualitative agreement between theory and experiment was obtained, however, for a quantitative comparison, additional accurate information on the adsorption isotherms and diffusion coefficients of the two studied surfactants in water and hexane, alone and in a mixed system, are required. pdf:docinfo:creator: Giuseppe Loglio, Volodymyr I. Kovalchuk, Alexey G. Bykov, Michele Ferrari, Jürgen Krägel, Libero Liggieri, Reinhard Miller, Boris A. Noskov, Piero Pandolfini, Francesca Ravera and Eva Santini PTEX.Fullbanner: This is pdfTeX, Version 3.14159265-2.6-1.40.18 (TeX Live 2017/W32TeX) kpathsea version 6.2.3 meta:author: Giuseppe Loglio, Volodymyr I. Kovalchuk, Alexey G. Bykov, Michele Ferrari, Jürgen Krägel, Libero Liggieri, Reinhard Miller, Boris A. Noskov, Piero Pandolfini, Francesca Ravera and Eva Santini trapped: False meta:creation-date: 2018-11-02T10:37:52Z created: 2018-11-02T10:37:52Z access_permission:extract_for_accessibility: true Creation-Date: 2018-11-02T10:37:52Z Author: Giuseppe Loglio, Volodymyr I. Kovalchuk, Alexey G. Bykov, Michele Ferrari, Jürgen Krägel, Libero Liggieri, Reinhard Miller, Boris A. Noskov, Piero Pandolfini, Francesca Ravera and Eva Santini producer: pdfTeX-1.40.18 pdf:docinfo:producer: pdfTeX-1.40.18 pdf:unmappedUnicodeCharsPerPage: 17 Keywords: adsorption of mixed surfactant; water/hexane interface; capillary pressure tensiometry; dilational viscoelasticity; drop oscillations; microgravity access_permission:modify_annotations: true dc:creator: Giuseppe Loglio, Volodymyr I. Kovalchuk, Alexey G. Bykov, Michele Ferrari, Jürgen Krägel, Libero Liggieri, Reinhard Miller, Boris A. Noskov, Piero Pandolfini, Francesca Ravera and Eva Santini dcterms:created: 2018-11-02T10:37:52Z Last-Modified: 2018-11-02T10:37:52Z dcterms:modified: 2018-11-02T10:37:52Z title: Dynamic Properties of Mixed Cationic/Nonionic Adsorbed Layers at the N-Hexane/Water Interface: Capillary Pressure Experiments Under Low Gravity Conditions Last-Save-Date: 2018-11-02T10:37:52Z pdf:docinfo:keywords: adsorption of mixed surfactant; water/hexane interface; capillary pressure tensiometry; dilational viscoelasticity; drop oscillations; microgravity pdf:docinfo:modified: 2018-11-02T10:37:52Z meta:save-date: 2018-11-02T10:37:52Z pdf:docinfo:custom:PTEX.Fullbanner: This is pdfTeX, Version 3.14159265-2.6-1.40.18 (TeX Live 2017/W32TeX) kpathsea version 6.2.3 Content-Type: application/pdf X-Parsed-By: org.apache.tika.parser.DefaultParser creator: Giuseppe Loglio, Volodymyr I. Kovalchuk, Alexey G. Bykov, Michele Ferrari, Jürgen Krägel, Libero Liggieri, Reinhard Miller, Boris A. Noskov, Piero Pandolfini, Francesca Ravera and Eva Santini dc:subject: adsorption of mixed surfactant; water/hexane interface; capillary pressure tensiometry; dilational viscoelasticity; drop oscillations; microgravity access_permission:assemble_document: true xmpTPg:NPages: 22 pdf:charsPerPage: 2957 access_permission:extract_content: true access_permission:can_print: true pdf:docinfo:trapped: False meta:keyword: adsorption of mixed surfactant; water/hexane interface; capillary pressure tensiometry; dilational viscoelasticity; drop oscillations; microgravity access_permission:can_modify: true pdf:docinfo:created: 2018-11-02T10:37:52Z