Aggregation Behavior in Aqueous Solutions of a New Class of Asymmetric Bipolar Amphiphiles Investigated by Surface Tension Measurements

2001 ◽  
Vol 239 (2) ◽  
pp. 517-521 ◽  
Author(s):  
M.-F. Gouzy ◽  
B. Guidetti ◽  
C. André-Barres ◽  
I. Rico-Lattes ◽  
A. Lattes ◽  
...  
Keyword(s):  
Surface Tension ◽  
Aqueous Solutions ◽  
Aggregation Behavior ◽  
New Class

scholarly journals Micellar Aggregation Behavior of Alkylaryl Sulfonate Surfactants for Enhanced Oil Recovery

Molecules ◽  
2019 ◽  
Vol 24 (23) ◽  
pp. 4325 ◽  
Author(s):  
Huoxin Luan ◽  
Lingyan Gong ◽  
Xinjian Yue ◽  
Xiaobin Nie ◽  
Quansheng Chen ◽  
...  
Keyword(s):  
Surface Tension ◽  
Aqueous Solutions ◽  
Enhanced Oil Recovery ◽  
Oil Recovery ◽  
Aggregation Number ◽  
Critical Micellar Concentration ◽  
Aggregation Behavior ◽  
Alkylaryl Sulfonate ◽  
Measuring Surface ◽  
Micellar Aggregation Number

Alkylaryl sulfonate is a typical family of surfactants used for chemically enhanced oil recovery (EOR). While it has been widely used in surfactant–polymer flooding at Karamay Oilfield (40 °C, salinity 14,000 mg/L), its aggregation behavior in aqueous solutions and the contribution of aggregation to EOR have not been investigated so far. In this study, raw naphthenic arylsulfonate (NAS) and its purified derivatives, alkylaryl monosulfonate (AMS) and alkylaryl disulfonate (ADS), were examined under simulated temperature and salinity environment of Karamay reservoirs for their micellar aggregation behavior through measuring surface tension, micellar size, and micellar aggregation number. It was found that all three alkylaryl sulfonate surfactants could significantly lower the surface tension of their aqueous solutions. Also, it has been noted that an elevation both in temperature and salinity reduced the surface tension and critical micellar concentration. The results promote understanding of the performance of NAS and screening surfactants in EOR.

Light-modulated aggregation behavior of some unsubstituted cinnamate-based ionic liquids in aqueous solutions

RSC Advances ◽  
2015 ◽  
Vol 5 (117) ◽  
pp. 96305-96312 ◽  
Author(s):  
Jie Yang ◽  
Huiyong Wang ◽  
Jianji Wang ◽  
Xiaojia Guo ◽  
Yue Zhang
Keyword(s):  
Ionic Liquids ◽  
Aqueous Solutions ◽  
Uv Light ◽  
Aggregation Behavior ◽  
Light Irradiation ◽  
New Class ◽  
Uv Light Irradiation

The aggregation behavior of a new class light-responsive ionic liquids was modulated efficiently by UV light irradiation in aqueous solutions.

scholarly journals Surface Thermodynamics, Viscosity, Activation Energy of N-Methyldiethanolamine Aqueous Solutions Promoted by Tetramethylammonium Arginate

Entropy ◽  
2020 ◽  
Vol 22 (12) ◽  
pp. 1337
Author(s):  
Xiangfeng Tian ◽  
Lemeng Wang ◽  
Pan Zhang ◽  
Dong Fu
Keyword(s):  
Activation Energy ◽  
Surface Tension ◽  
Diffusion Coefficient ◽  
Aqueous Solutions ◽  
Quantitative Relationship ◽  
Viscosity Data ◽  
Surface Thermodynamics ◽  
Surface Entropy ◽  
Operation Conditions ◽  
Surface Enthalpy

The surface tension and viscosity values of N-methyldiethanolamine (MDEA) aqueous solutions promoted by tetramethylammonium arginate ([N1111][Arg]) were measured and modeled. The experimental temperatures were 303.2 to 323.2 K. The mass fractions of MDEA (wMDEA) and [N1111][Arg] (w[N1111][Arg]) were 0.300 to 0.500 and 0.025 to 0.075, respectively. The measured surface tension and viscosity values were satisfactorily fitted to thermodynamic models. With the aid of experimentally viscosity data, the activation energy (Ea) and H2S diffusion coefficient (DH2S) of MDEA-[N1111][Arg] aqueous solution were deduced. The surface entropy and surface enthalpy of the solutions were calculated using the fitted model of the surface tension. The quantitative relationship between the calculated values (surface tension, surface entropy, surface enthalpy, viscosity, activation energy, and H2S diffusion coefficient) and the operation conditions (mass fraction and temperature) was demonstrated.

Aggregation Behavior and Microstructure of Cationic Trisiloxane Surfactants in Aqueous Solutions

1994 ◽  
Vol 98 (24) ◽  
pp. 6148-6157 ◽  
Author(s):  
M. He ◽  
Z. Lin ◽  
L. E. Scriven ◽  
H. T. Davis ◽  
S. A. Snow
Keyword(s):  
Aqueous Solutions ◽  
Aggregation Behavior ◽  
Trisiloxane Surfactants

Effects of hydrating water molecules on the aggregation behavior of azo dyes in aqueous solutions

1991 ◽  
Vol 16 (2) ◽  
pp. 111-118 ◽  
Author(s):  
Kunihiro Hamada ◽  
Haruhiko Nonogaki ◽  
Yoshihiro Fukushima ◽  
Baljir Munkhbat ◽  
Masaru Mitsuishi
Keyword(s):  
Aqueous Solutions ◽  
Azo Dyes ◽  
Aggregation Behavior ◽  
Water Molecules

scholarly journals Spray adjuvant characteristics affecting agricultural spraying drift

2015 ◽  
Vol 35 (1) ◽  
pp. 109-116 ◽  
Author(s):  
RONE B. DE OLIVEIRA ◽  
ULISSES R. ANTUNIASSI ◽  
MARCO A. GANDOLFO
Keyword(s):  
Surface Tension ◽  
Wind Tunnel ◽  
Aqueous Solutions ◽  
Formation Process ◽  
Droplet Diameter ◽  
Brilliant Blue ◽  
Medium Size ◽  
Blue Dye ◽  
Methods Of Evaluation ◽  
Spray Adjuvants

This study defined the main adjuvant characteristics that may influence or help to understand drift formation process in the agricultural spraying. It was evaluated 33 aqueous solutions from combinations of various adjuvants and concentrations. Then, drifting was quantified by means of wind tunnel; and variables such as percentage of droplets smaller than 50 μm (V50), 100 μm (V100), diameter of mean volume (DMV), droplet diameter composing 10% of the sprayed volume (DV0.1), viscosity, density and surface tension. Assays were performed in triplicate, using Teejet XR8003 flat fan nozzles at 200 kPa (medium size droplets). Spray solutions were stained with Brilliant Blue Dye at 0.6% (m/ v). DMV, V100, viscosity cause most influence on drift hazardous. Adjuvant characteristics and respective methods of evaluation have applicability in drift risk by agricultural spray adjuvants.

Aggregation behavior of MPEG-PCL diblock copolymers in aqueous solutions and morphologies of the aggregates

2006 ◽  
Vol 44 (23) ◽  
pp. 3406-3417 ◽  
Author(s):  
Chengfei Lu ◽  
Shengrong Guo ◽  
Li Liu ◽  
Yaqiong Zhang ◽  
Zonghai Li ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Diblock Copolymers ◽  
Aggregation Behavior

scholarly journals PECULARITIES OF MICELLE FORMATION OF PENTACYCLIC GLYCOSIDES IN AQUEOUS SOLUTIONS

2021 ◽  
Vol 64 (4) ◽  
pp. 26-33
Author(s):  
Natalia V. Mironenko ◽  
Irina V. Shkutina ◽  
Vladimir F. Selemenev
Keyword(s):  
Surface Tension ◽  
Light Scattering ◽  
Dynamic Light Scattering ◽  
Aqueous Solutions ◽  
Hydrodynamic Radius ◽  
Critical Concentration ◽  
Micelle Formation ◽  
Cylindrical Shape ◽  
Scattering Method ◽  
Dynamic Light Scattering Method

The regularities of changes in structural characteristics during the formation of associates in micellar aqueous solutions of triterpene saponins Quillaja Saponin and Sapindus Mukorossi are considered. The dependence of surface tension and adsorption on the concentration of an aqueous saponin solution is analyzed, and the values of surface activity and parameters of the adsorption layer are calculated. The average values of diffusion coefficients for spherical and cylindrical micelles are determined based on the measurement of the solution viscosity. The effect of the electrolyte solution on the surface tension and viscosity of glycoside solutions is studied: when the electrolyte is introduced into the saponin solution, the surface tension decreases, which leads to a shift in the critical concentration of micelle formation towards lower concentrations. The introduction of potassium chloride electrolyte reduces the degree of ionization and, as a result of suppressing the electroviscosity effect, leads to a decrease in the viscosity of the solution. The dynamic light scattering method is used to determine the size of glycoside aggregates. It is established that there are aggregates of several sizes in an aqueous solution of saponin. The size and shape of aggregates were calculated using the concepts of micelle packing parameters. In the region of very low concentrations of glycoside solutions, when approaching the critical concentration of micelle formation in the solution, there are spherical micelles. A further increase in the saponin concentration in the solution leads to a decrease in the content of structures with a hydrodynamic radius of 50-80 nm and the appearance of larger agglomerates with sizes greater than 100 nm. It was found that micelles acquire a less hydrated and more densely packed cylindrical shape in the concentration range of 1.7-2.6 mmol/dm3. Compaction of associates leads to an increase in the content of particles with a hydrodynamic radius of 150-250 nm and larger ones, and their presence predicts the appearance of larger agglomerates. Analyzing the data obtained using the dynamic light scattering method, it can be concluded that aggregates of several sizes co-exist in the volume of aqueous saponin solutions at certain concentrations.

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