Two cloud-point phenomena in tetrabutylammonium perfluorooctanoate aqueous solutions: Anomalous temperature-induced phase and structure transitions

Article Abstract:

The phase behavior and aggregate structure of tetrabutylammonium perfluorooctanoate (TBPFO), determined by differential scanning calorimeter, electrical conductivity, static/dynamic light scattering, and rheology methods is reported. It was found that above a certain concentration, the TBPFO solution showed anomalous temperature-dependant phase behavior and structure transitions, which meant that such an ionic surfactant solution exhibits two cloud-points.

Analysis, Electrical conductivity, Rheology, Ammonium perfluorooctanoate

---

Effect of guest hydrophobicity on water sorption behavior of oligomeric/[alpha]-cyclodextrin inclusion complexes

Article Abstract:

Complementary water vapor sorption and wide-angle X-ray diffractomery (WAXD) are performed on oligomer/[alpha]cyclodextrin ([alpha]-CD) inclusion complexes (ICs) in order to determine their structures and stabilities. Polyethylene glycol (PEG) and hexatriacontane (HTC) guests are used to examine the effect of guest molecule hydrophobicity on water adsorption isotherms.

Science & research, Research, Observations, Water, X-rays, X-ray diffraction, Optical properties, Cyclodextrins, Mechanical properties, Hydrophobic effect

---

Similar abstracts:

• Abstracts: Vibrational analysis of molecular interactions in aqueous glucose solutions. Temperature and concentration effects
• Abstracts: Salting-out effects in aqueous ionic liquid solutions: Cloud-point temperature shifts. On the critical temperature, normal boiling point, and vapor pressure of ionic liquids
• Abstracts: Use of infrared bands of the surfactant headgroup to identify mixed surfactant structures adsorbed on Titania
• Abstracts: Location of spectroscopic probes in self-aggregating assemblies. II. The location of pyrene and other probes in sodium dodecyl sulfate micelles
• Abstracts: Fluorescence probing of temperature-dependent dynamics and friction in ionic liquid local environments

This website is not affiliated with document authors or copyright owners. This page is provided for informational purposes only. Unintentional errors are possible.