New Family of Nonionic Gemini Surfactants. Determination and Analysis of Interfacial Properties

Langmuir ◽  
2002 ◽  
Vol 18 (7) ◽  
pp. 2477-2482 ◽  
Author(s):  
Mariano J. L. Castro ◽  
José Kovensky ◽  
Alicia Fernández Cirelli
Keyword(s):  
Gemini Surfactants ◽  
Interfacial Properties ◽  
New Family

A New Family of Anionic Surfactants for Enhanced-Oil-Recovery Applications

SPE Journal ◽  
2013 ◽  
Vol 18 (05) ◽  
pp. 829-840 ◽  
Author(s):  
Bo Gao ◽  
Mukul M. Sharma
Keyword(s):  
Enhanced Oil Recovery ◽  
Oil Recovery ◽  
Gemini Surfactants ◽  
Anionic Surfactants ◽  
Interfacial Properties ◽  
Single Chain ◽  
New Family ◽  
Low Concentrations ◽  
Reservoir Conditions ◽  
Hydrophobic Tail

Summary A new family of anionic surfactants that has great potential for enhanced-oil-recovery (EOR) applications was synthesized and characterized in our laboratory. The unique and versatile structure of these surfactants has endowed them with properties that are attractive for EOR. A detailed experimental study was carried out and is presented here on the oil/water and solid/water interfacial properties of seven novel molecules. The interfacial properties of this series of seven anionic surfactants with different lengths of hydrophobic tail and linking spacer group show systematic trends in interfacial tension (IFT) and static adsorption density with changes in solution conditions. These molecules showed excellent aqueous stability even in high-salinity and hard brines. Ultralow IFT (ULIFT) values were measured at low surfactant concentrations. The synthesized Gemini surfactants also showed lower maximal adsorption densities than the conventional single-chain surfactants. The results from this study showed the potential of using these surfactants at low concentrations and in harsh reservoir conditions.

Synthesis and Surface/Interfacial Properties of Novel Dialkyl Disulfonate Gemini Surfactants Derived from 1,3,5-triazine

2016 ◽  
Vol 53 (6) ◽  
pp. 595-600 ◽  
Author(s):  
Ruixia Niu ◽  
Chao Wang ◽  
Hua Song ◽  
Jingling Wang ◽  
Daqiang Wang ◽  
...  
Keyword(s):  
Gemini Surfactants ◽  
Interfacial Properties

β-Amino acid derived gemini surfactants from diformylfuran (DFF) with particularly low critical micelle concentration (CMC)

2017 ◽  
Vol 19 (17) ◽  
pp. 4074-4079 ◽  
Author(s):  
Quentin Girka ◽  
Nicolas Hausser ◽  
Boris Estrine ◽  
Norbert Hoffmann ◽  
Jean Le Bras ◽  
...  
Keyword(s):  
Amino Acid ◽  
Critical Micelle Concentration ◽  
Gemini Surfactants ◽  
New Family

Starting from diformylfuran (DFF) obtained from biomass, a new family of gemini surfactants has been synthesized.

Effect of inorganic and organic counterions on interfacial properties of oleic acid-based gemini surfactants

2018 ◽  
Vol 538 ◽  
pp. 73-78 ◽  
Author(s):  
Tadashi Sugahara ◽  
Yuichiro Takamatsu ◽  
Masaaki Akamatsu ◽  
Kenichi Sakai ◽  
Masahiko Abe ◽  
...  
Keyword(s):  
Oleic Acid ◽  
Gemini Surfactants ◽  
Interfacial Properties ◽  
Inorganic And Organic

Microstructure and crystal symmetry of Pb2Sr2(Y/Ca)Cu3O9−δ

1990 ◽  
Vol 48 (4) ◽  
pp. 64-65
Author(s):  
Y. P. Lin ◽  
J. S. Xue ◽  
J. E. Greedan
Keyword(s):  
Electron Diffraction ◽  
High Temperature Superconductors ◽  
Carbon Film ◽  
Basic Structure ◽  
Crystal Symmetry ◽  
X Ray Diffraction ◽  
X Ray ◽  
Space Groups ◽  
New Family ◽  
Convergent Beam

A new family of high temperature superconductors based on Pb2Sr2YCu3O9−δ has recently been reported. One method of improving Tc has been to replace Y partially with Ca. Although the basic structure of this type of superconductors is known, the detailed structure is still unclear, and various space groups has been proposed. In our work, crystals of Pb2Sr2YCu3O9−δ with dimensions up to 1 × 1 × 0.25.mm and with Tc of 84 K have been grown and their superconducting properties described. The defects and crystal symmetry have been investigated using electron microscopy performed on crushed crystals supported on a holey carbon film.Electron diffraction confirmed x-ray diffraction results which showed that the crystals are primitive orthorhombic with a=0.5383, b=0.5423 and c=1.5765 nm. Convergent Beam Electron Diffraction (CBED) patterns for the and axes are shown in Figs. 1 and 2 respectively.

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