scholarly journals Surface - Active and Complexforming Copolymers of Sodium 2-acrylamido-2-methylpropanesulfonate with Ethyleneglycol Vinyl Ether

2015 ◽  
Vol 15 (4) ◽  
pp. 313
Author(s):  
Y.M. Shaikhutdinov ◽  
S.Kh. Khussain ◽  
N.Zh. Seitkaliyeva ◽  
A.Zh. Zhenissova ◽  
Z.G. Akkulova
Keyword(s):  
Surface Tension ◽  
Free Energy ◽  
Ethylene Glycol ◽  
Vinyl Ether ◽  
Surface Activity ◽  
Water Solution ◽  
Molar Fraction ◽  
Standard Free Energy ◽  
Water Soluble ◽  
Interpolymer Complex

<p>A new water-soluble polyelectrolyte - the copolymer of sodium 2-acrylamido-2-methylpropanesulfonate and ethylene glycol vinyl ether has been synthesized by free-radical copolymerization in aqueous medium. Synthesis of the linear structure water-soluble copolymer of sodium 2-acrylamido-2-methylpropanesulfonate (Na-AMPS) and ethylene glycol vinyl ether (EGVE) has been confirmed by IR spectroscopy method, potentiometric titration and viscometer. The concentration behavior of the reduced viscosity of copolymer solutions that is typical for polyelectrolytes has been revealed. The reactivity ratios for the copolymerization of the monomers estimated by the Mayo–Lewis method have indicated lower reactivity of ethylenglycol vinyl ether in comparison with sodium 2-acrylamido-2-methylpropanesulfonate. Also it was shown the decrease of reaction’s relative rate with an increase of molar fraction of EGVE in the initial mixture of monomers. Adsorption at the air-water solution interface was studied by measure of surface tension (σ) in order to determine the surface properties of new copolymers of ethyleneglycol vinyl ethers – sodium 2-acrylamido-2-methylpropanesulfonate. It was shown that copolymers of sodium 2-acrylamido-2-methylpropanesulfonate and ethylenglycol vinyl ether have higher surface activity compared to sodium 2-acrylamido-2-methylpropanesulfonate homopolymer. The isotherm of copolymer’s surface tension based on equilibrium value of σ was constructed together with the isotherm of surface tension water solution poly- Na-AMPS. Based on isotherms the surface activity on Rebinder (G<sub>Re</sub>) for poly- Na-AMPS and copolymer Na-AMPS-EGVE was determined. The values of polymer’s standard free energy of adsorption (Δ<sub>ads</sub>G<sup>0</sup><sub>298</sub>) were calculated in order to identify the causes and mechanism of change in surface activity and adsorption. Results show that the gain in standard free energy adsorption in the transition from homopolymer to copolymer Na-AMPS-EGVE is about 4 kJ/base-mole. Interpolymer reaction of the Na-AMS–EGVE copolymer with poly- <em>N,N</em>-dimethyl-<em>N,N</em>-diallylammonium chloride (PMAAC) has been studied. Higher surface activity of mixtures of copolymer and PMAAC than of individual polyelectrolytes was discovered. This effect testified to the formation of interpolymer complex of the Na-AMS–EGVE copolymer with polycations due to electrostatic interactions.</p>

scholarly journals Experimental Investigations of Behaviour of Biosurfactants in Brine Solutions Relevant to Hydrocarbon Reservoirs

2019 ◽  
Vol 3 (1) ◽  
pp. 24 ◽  
Author(s):  
Tinuola Udoh ◽  
Jan Vinogradov
Keyword(s):  
Surface Tension ◽  
Free Energy ◽  
Oil Recovery ◽  
High Salinity ◽  
Standard Free Energy ◽  
Experimental Investigations ◽  
Surface Excess ◽  
Hydrocarbon Reservoir ◽  
Air Interface ◽  
Gibbs Surface Excess

In this study, we investigated the behaviour of rhamnolipid and Greenzyme in brine solutions relevant to hydrocarbon reservoir. Prior to this work, several studies only reported the behaviour of the biosurfactants dissolved in sodium chloride solutions of varied salinity. The results of this study are relevant to the application of the biosurfactants in enhanced oil recovery, during which the compounds are injected into reservoir saturated with formation water, typically of high salinity and complex composition. Surface tension and conductivity methods were used to determine the critical micelle concentrations of the biosurfactants, Gibbs surface excess concentrations and standard free energy at water-air interface. The results show that rhamnolipid and Greenzyme could reduce the surface tension of water from 72.1 ± 0.2 mN/m to 34.7 ± 0.4 mN/m and 47.1 ± 0.1 mN/m respectively. They were also found to be stable in high salinity and high temperature with rhamnolipid being sensitive to brine salinity, composition and pH while Greenzyme showed tolerance for high salinity. Furthermore, the Gibbs standard free energy of micellisation shows that rhamnolipid and Greenzyme have the tendency to spontaneously form micelles with rhamnolipid showing more surface adsorption. However from maximal Gibbs surface excess concentration calculations, Greenzyme monomers tend to favour aggregation more than that of rhamnolipid.

The Effects that Cosolvent Takes on Ink Used in Water-Borne Pen Performance and Quality

2011 ◽  
Vol 380 ◽  
pp. 20-23
Author(s):  
Ling Jia ◽  
Bei Qing Huang ◽  
Xian Fu Wei
Keyword(s):  
Surface Tension ◽  
Ethylene Glycol ◽  
Isopropyl Alcohol ◽  
Water Soluble ◽  
Drying Rate ◽  
Quality Performance ◽  
Monobutyl Ether ◽  
Glycol Monobutyl Ether ◽  
Water Borne

In order to discuss the effects that cosolvent takes on ink used in water-borne pen performance and quality, select and use ethanol, methanol, isopropanol, Ethylene glycol monobutyl ether, ethanediol and propanediol six common water-soluble cosolvent, using them to prepare the samples of ink used in Water-borne pen, testing the surface tension, viscosity, drying rate and adhesionforce. Select three kinds of cosolvent to carry the formula experiment. The results of the study show that: the ink prepared with different kinds csolvent have different performance. The ink prepared by isopropyl alcohol has good quality performance.

scholarly journals Characterization and surface activity of soluble sulfonated butanone formaldehyde superplasticizer for cement

2016 ◽  
Vol 51 (2) ◽  
pp. 155-158
Author(s):  
S Sultana ◽  
Z Yeasmin ◽  
S Ahmed ◽  
HP Nur ◽  
PR Samaddar
Keyword(s):  
Surface Tension ◽  
Surface Activity ◽  
Conventional Method ◽  
Water Soluble ◽  
Target Compound

Water soluble sulfonated butanone formaldehyde (SBF) polycondensate superplasticizer was prepared according to a conventional method. UV-Vis, IR and TGA analyses were performed to analyze the target compound. The surface activity was evaluated. It showed a little surface activity with respect to water as the surface tension decreased very little with increasing the concentration of SBF. Thus there results indicate that SBF behaves like a typical polycondensate superplasticizer such as sulfonated acetone formaldehyde (SAF).Bangladesh J. Sci. Ind. Res. 51(2), 155-158, 2016

scholarly journals Achieving optimal micro-explosions in stable emulsions by adding water-soluble polymers

2022 ◽  
Author(s):  
Cao Liu ◽  
Tianchun Xiao ◽  
Lingrui Cui ◽  
Lian CEN ◽  
Jinshan XU ◽  
...  
Keyword(s):  
Surface Tension ◽  
Interfacial Tension ◽  
Surface Activity ◽  
Xanthan Gum ◽  
Emulsion Stability ◽  
Water Soluble ◽  
Water Soluble Polymers ◽  
Soluble Polymers ◽  
Strong Surface ◽  
First Time

The emulsified feedstock technique is to improve the performance of products by using the micro-explosion phenomenon of emulsion. However, an obstacle to some applications of this technology is the contradiction between emulsion stability and micro-explosion intensity. For the first time, adding water-soluble polymers was proposed to solve this problem. Two polymers of xanthan gum (XG) and nonionic polyacrylamide (NPAM) were investigated and the results show that micro-explosions have five forms. As one of these five forms, the intensity of optimal micro-explosion is three orders of magnitude higher than other forms, and adding 0.5% XG increases the probability of optimal micro-explosion from 0% to 60% due to the low surface activity, strong thickening and pseudoplasticity of XG solutions. By contrast, NPAM does not promote micro-explosion because of its strong surface activity. Finally, a new mechanism for micro-explosions related to surface tension, interfacial tension and viscosity is proposed.

scholarly journals Adsorption of Polycomplexes at Solution/Air Interface

2017 ◽  
Vol 4 (4) ◽  
pp. 259
Author(s):  
E.M. Shaikhutdinov ◽  
K.Zh. Abdiyev ◽  
M.B. Zhursumbayeva ◽  
S.Kh. Khussain
Keyword(s):  
Surface Tension ◽  
Relaxation Time ◽  
Complex Formation ◽  
Surface Activity ◽  
Kinetic Data ◽  
Hydrophobic Interactions ◽  
Standard Free Energy ◽  
Free Energy Of Adsorption ◽  
Air Interface ◽  
Potentiometric Measurements

<p>The effect of complex formation of polyacids (polyacrylic (PAAc) and polymethacrylic (PMAAc)) with polyacrylamide (PAA) on their surface properties at solution/air interface has been studied by surface tension, electric conductivity and potentiometric measurements at 293±0.2 K. The relaxation time and surface activity of polycomplexes were calculated from kinetic data on the surface tension. It was found that during complex formation the relaxation time of a surface layer has a maximum and the surface activity of macromolecules is increased. Also the standard free energy of adsorption for PAA and polyacid-PAA polycomplexes were calculated. They are equal DadsG°<sub>293</sub> = - 19.1±0.1 kJ/base-mol. for PAA, DadsG°<sub>293</sub> = -21.2±0.1 kJ/basemol. for PMAAc-PAA polycomplex and DadsG°<sub>293</sub> = -23.0±0.1 kJ/base-mol. for PAAc-PAA polycomplex (calculation per base-mole of PAA monomer link). It is shown that the surface activity and ability to decrease of the water surface tension is less for PMAAc-PAA than for PAAc-PAA. Such anomalous behaviour of PMAAc-PAA polycomplex probably is caused by an excessive strengthening of inner- and intermolecular hydrophobic interactions in macromolecules of PMAAc- PAA polycomplexes due to the presence of α-methyl groups in PMAAc macromolecules. Because of the rebuilding of macromolecule segments of complex by polarity at the interface is becoming a difficult one.</p>

scholarly journals Adsorption Properties of Hydrocarbon and Fluorocarbon Surfactants Ternary Mixture at the Water-Air Interface

Molecules ◽  
2021 ◽  
Vol 26 (14) ◽  
pp. 4313
Author(s):  
Bronisław Jańczuk ◽  
Katarzyna Szymczyk ◽  
Anna Zdziennicka
Keyword(s):  
Surface Tension ◽  
Water Surface ◽  
Standard Free Energy ◽  
Ternary Mixtures ◽  
Free Energy Of Adsorption ◽  
Interface Tension ◽  
Air Interface ◽  
Surface Excess Concentration ◽  
Tail Water ◽  
Triton X

Measurements were made of the surface tension of the aqueous solutions of p-(1,1,3,3-tetramethylbutyl) phenoxypoly(ethylene glycols) having 10 oxyethylene groups in the molecule (Triton X-100, TX100) and cetyltrimethylammonium bromide (CTAB) with Zonyl FSN-100 (FC6EO14, FC1) as well as with Zonyl FSO-100 (FC5EO10, FC2) ternary mixtures. The obtained results were compared to those provided by the Fainerman and Miller equation and to the values of the solution surface tension calculated, based on the contribution of a particular surfactant in the mixture to the reduction of water surface tension. The changes of the aqueous solution ternary surfactants mixture surface tension at the constant concentration of TX100 and CTAB mixture at which the water surface tension was reduced to 60 and 50 mN/m as a function of fluorocarbon surfactant concentration, were considered with regard to the composition of the mixed monolayer at the water-air interface. Next, this composition was applied for the calculation of the concentration of the particular surfactants in the monolayer using the Frumkin equation. On the other hand, the Gibbs surface excess concentration was determined only for the fluorocarbon surfactants. The tendency of the particular surfactants to adsorb at the water-air interface was discussed, based on the Gibbs standard free energy of adsorption which was determined using different methods. This energy was also deduced, based on the surfactant tail surface tension and tail-water interface tension.

Sign in / Sign up

Export Citation Format

Share Document