Aggregation of Amphiphilic Molecules in Supercritical Carbon Dioxide: A Small Angle X-ray Scattering Study

Star Polymer/Water Solutions: New Experimental Findings

“…At higher Q up to 0.3Å −1 , where scattering from smaller structures becomes dominant, SAXS curves were interpreted by scattering from rodlike segments of the PFOA backbone. [12] The structural data suggest distinguishing between two time scale regions: (i) A relatively slow one quantifying the Brownian dynamics of micelles as a whole,…”

Design of Nonionic Surfactants for Supercritical Carbon Dioxide

“…Several laboratories have demonstrated progress in the micellization of aqueous and polar materials in many dense sc fluids including alkanes, chlorofluorocarbons, hydrofluorocarbons, and CO 2 (10)(11)(12)(13)(14)(15). However, success in designing generic surfactants for CO 2 has been hindered by the challenge of identifying lyophilic segments for CO 2 .…”

Microemulsions - A Brief Introduction

“…Various techniques have been used for the investigation of the microstructure of microemulsions in supercritical fluids. Among them are the time-resolved fluorescence spectroscopy using coumarin 480 (Pramanik et al, 2010), pyridine N-oxide (Simón de Dios & Díaz-García, 2010, Yazdi et al, 1990, Zhang & Bright, 1992a, 1992b, López-Quintela et al, 2004, pyrene (Nazar et al, 2009) or Ti(IV) complexes (Chem et al, 2009) as fluorescence probe, FT-IR spectroscopy (Yee et al, 1991, Takebayashi et al, 2011, small-angle neutron scattering (SANS) measurements (Eastoe et al, 1996, Zielinski et al, 1997, Cummings et al, 2012, Torino et al, 2010, Frielinghaus et al, 2006, electron paramagnetic resonance (EPR) spectroscopy (Johnston et al, 1996), small-angle X-ray scattering (SAXS) (Fulton et al, 1995, Kometani et al, 2008, Akutsu et al, 2007, nearinfrared spectroscopy (Takebayashi et al, 2011), and high-pressure NMR (Thurecht et al, 2006), which have been extensively employed for investigation of these systems.…”