Surface activity, wetting and foaming properties of amine-oxidized nonionic fluorocarbon surfactant and hydrocarbon anionic surfactants mixtures at low concentrations

2021 ◽  
pp. 117701
Author(s):  
Mengyuan Peng ◽  
Yawen Yang ◽  
Min Sha ◽  
Jiaqing Fang ◽  
Ding Zhang ◽  
...  
Keyword(s):  
Surface Activity ◽  
Anionic Surfactants ◽  
Foaming Properties ◽  
Fluorocarbon Surfactant ◽  
Low Concentrations

Phase behavior of cationic and anionic surfactants at low concentrations

1992 ◽  
Vol 50 (1) ◽  
pp. 694-695
Author(s):  
E. Naranjo
Keyword(s):  
Phase Behavior ◽  
Structural Characterization ◽  
Dynamic Systems ◽  
Anionic Surfactants ◽  
Intermolecular Forces ◽  
Stable Form ◽  
Surfactant Mixtures ◽  
Low Concentrations ◽  
Cationic And Anionic Surfactants ◽  
General Method

Equilibrium vesicles, those which are the stable form of aggregation and form spontaneously on mixing surfactant with water, have never been demonstrated in single component bilayers and only rarely in lipid or surfactant mixtures. Designing a simple and general method for producing spontaneous and stable vesicles depends on a better understanding of the thermodynamics of aggregation, the interplay of intermolecular forces in surfactants, and an efficient way of doing structural characterization in dynamic systems.

Reduction of Surfactant Retention in Limestones Using Sodium Hydroxide

SPE Journal ◽  
2018 ◽  
Vol 24 (01) ◽  
pp. 92-115 ◽  
Author(s):  
D.. Wang ◽  
M.. Maubert ◽  
G. A. Pope ◽  
P. J. Liyanage ◽  
S. H. Jang ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Sodium Hydroxide ◽  
Anionic Surfactants ◽  
Geochemical Modeling ◽  
Low Molecular Weight ◽  
Low Concentrations ◽  
Reservoir Conditions ◽  
Negative Surface ◽  
Negative Surface Charge ◽  
Indiana Limestone

Summary Geochemical modeling was used to design and conduct a series of alkaline/surfactant/polymer (ASP) coreflood experiments to measure the surfactant retention in limestone cores using sodium hydroxide (NaOH) as the alkali. Surfactant/polymer (SP) coreflood experiments were conducted under the same conditions for comparison. NaOH has been used for ASP floods of sandstones, but these are the first experiments to test it for ASP floods of limestones. Two studies performed under different reservoir conditions showed that NaOH significantly reduced the surfactant retention in Indiana Limestone. An ASP solution with 0.3 wt% NaOH has a pH of approximately 12.6 at 25°C. The high pH increases the negative surface charge of the carbonate, which favors lower adsorption of anionic surfactants. Another advantage of NaOH is that low concentrations of only approximately 0.3 wt% can be used because of its low molecular weight and its low consumption in limestones. Most reservoir carbonates contain gypsum or anhydrite, and therefore sodium carbonate (Na2CO3) will be consumed by the precipitation of calcium carbonate (CaCO3). As shown in the two studies, NaOH can be used in limestone reservoirs containing gypsum or anhydrite.

The influence of negatively charged silica nanoparticles on the surface properties of anionic surfactants: electrostatic repulsion or the effect of ionic strength?

2020 ◽  
Vol 22 (4) ◽  
pp. 2238-2248 ◽  
Author(s):  
Milad Eftekhari ◽  
Karin Schwarzenberger ◽  
Aliyar Javadi ◽  
Kerstin Eckert
Keyword(s):  
Ionic Strength ◽  
Silica Nanoparticles ◽  
Surface Properties ◽  
Surface Activity ◽  
Aqueous Phase ◽  
Anionic Surfactants ◽  
Electrostatic Repulsion ◽  
Charged Nanoparticles

The presence of negatively charged nanoparticles affects the surface activity of anionic surfactants in an aqueous phase. This effect is mainly caused by the change in ionic strength of the system resulted from the addition of nanoparticles.

Facile synthesis, surface activity, wettability and ultrahigh foaming properties of novel nonionic Gemini fluorocarbon surfactants

2020 ◽  
Vol 302 ◽  
pp. 112469 ◽  
Author(s):  
Cai-Lian Chen ◽  
Yi-Fan Liao ◽  
Feng Lu ◽  
Yu-Sen Zheng ◽  
Ying-Ying Peng ◽  
...  
Keyword(s):  
Surface Activity ◽  
Foaming Properties ◽  
Facile Synthesis

Synthesis of Cleavable Aryl Sulfonate Anionic Surfactants and a Study of their Surface Activity

2008 ◽  
Vol 11 (2) ◽  
pp. 97-102 ◽  
Author(s):  
Lin Chen ◽  
Zhiyong Hu ◽  
Hailin Zhu ◽  
Zhuanru Xue
Keyword(s):  
Surface Activity ◽  
Anionic Surfactants

Study on Wettability Alteration of Quartz Surface by Surfactants

2014 ◽  
Vol 962-965 ◽  
pp. 539-543
Author(s):  
Zi Yuan Qi ◽  
Ye Fei Wang ◽  
Hai Yang Yu ◽  
Xiao Li Xu
Keyword(s):  
Nonionic Surfactants ◽  
Anionic Surfactants ◽  
Electrostatic Force ◽  
Dynamic Contact ◽  
Contact Angles ◽  
Wettability Alteration ◽  
Quartz Surface ◽  
Hydrophobic Force ◽  
Polar Components ◽  
Low Concentrations

In order to study the effect of surfactants on wettability of quartz surface, the dynamic contact angles of different surfactants on water-wet and oil-wet quartz surfaces were measured. The experimental results showed that the advancing contact angles of cationic surfactants, anionic surfactants and nonionic surfactants on oil-wet quartz surfaces decrease with the increase of surfactant concentrations; the wettability of water-wet quartz plates remains water-wet after treated by all three kinds of surfactants. Surfactants can reverse the wettability from oil-wet to water-wet at low concentrations; The electrostatic force, hydrophobic force and the attraction between surfactant and polar components of crude oil are the key interactions in the wettability alteration process.

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