scholarly journals NEW SURFACE-ACTIVE PETROCOLLECTING AND PETRODISPERSING REAGENT BASED ON STEARIC ACID AND TRYETHYLENETETRAAMINE

ASJ. ◽  
2021 ◽  
Vol 1 (54) ◽  
pp. 39-44
Author(s):  
I. Zarbaliyeva ◽  
A. Alimova ◽  
H. Nabiyeva ◽  
S. Ahmadbayova ◽  
A. Mammadov
Keyword(s):  
Surface Tension ◽  
Critical Micelle Concentration ◽  
Room Temperature ◽  
Solvent Structure ◽  
Conductivity Measurements ◽  
Surface Excess ◽  
Chemical Parameters ◽  
Corrosion Properties ◽  
Gibbs Energies ◽  
Surface Active

New surfactant was synthesized from stearic and triethylenetetraamine at room temperature, without utilizing any catalyst or solvent. Structure and composition of the salt was confirmed by using IR-, NMR- and UV- spectroscopies . Surface tension, conductivity measurements were performed on aqueous solutions of new surfactant. Its surface activity and colloidal-chemical parameters such as critical micelle concentration (CMC), surface pressure at CMC (πCMC), surface tension at CMC (γCMC), surface excess (Γmax), concentration required for 20 mN/m reduction of surface tension (C20), Gibbs energies of adsorption and micellization (ΔGad and ΔGmic) were determined. Moreover, corrosion properties and petrocollecting and petrodispersing properties of this salt was determined and maximum values of petrocollecting coefficients was calculated. 

scholarly journals Micellization behaviour of sodium dodecyl sulphate in presence and absence of sodium sulphate and zinc sulphate in distilled water by surface tension measurement

BIBECHANA ◽  
2014 ◽  
Vol 11 ◽  
pp. 79-85 ◽  
Author(s):  
Kuber Limbu ◽  
Sujit Kumar Shah ◽  
Ajaya Bhattarai
Keyword(s):  
Surface Tension ◽  
Critical Micelle Concentration ◽  
Sodium Dodecyl Sulphate ◽  
Room Temperature ◽  
Zinc Sulphate ◽  
Sodium Dodecyl ◽  
Sodium Sulphate ◽  
Distilled Water ◽  
Surface Tension Measurement ◽  
Weight Method

The accurate measurements of surface tension of sodium dodecyl sulphate (SDS) in distilled water and in presence of 0.01M Na2SO4 and 0.01M ZnSO4 at room temperature were reported by drop weight method using a stalagmometer. The critical micelle concentration (cmc) of sodium dodecyl sulphate (SDS) in distilled water was obtained higher than in presence of Na2SO4 and ZnSO4. The decrease of cmc of sodium dodecyl sulphate in the presence of salts has been discussed. DOI: http://dx.doi.org/10.3126/bibechana.v11i0.10383 BIBECHANA 11(1) (2014) 79-85

scholarly journals Surface Tension Studies on the Micellization of Cetyltrimethylammonium Bromide in Presence and Absence of KCL and NaCl in Aqueous Media at Room Temperature

BIBECHANA ◽  
2013 ◽  
Vol 10 ◽  
pp. 52-57 ◽  
Author(s):  
Kabita Jha ◽  
Ajaya Bhattarai ◽  
Sujeet Kumar Chatterjee
Keyword(s):  
Surface Tension ◽  
Free Energy ◽  
Critical Micelle Concentration ◽  
Cetyltrimethylammonium Bromide ◽  
Room Temperature ◽  
Aqueous Media ◽  
Sharp Decrease ◽  
Presence And Absence ◽  
Versus Concentration

NOTE: on 27th May 2014 in the abstract, the sentence"The surface tension of cetyltrimethylammonium bromide is found less in presence of KCl than NaCl in aqueous media" was changed to read "The surface tension of cetyltrimethylammonium bromide is found more in presence of KCl than NaCl in aqueous media."In the Conclusion (p.56) the sentence"The surface tension of cetyltrimethylammonium bromide is found less in presence of KCl than NaCl in aqueous media." was changed to read"The surface tension of cetyltrimethylammonium bromide is found more in presence of KCl than NaCl in aqueous media." Precise measurements on Surface tension of cetyltrimethylammonium bromide in presence and in absence of KCl and NaCl in aqueous media are reported. The results showed a sharp decrease in surface tension with increase in concentration of cetyltrimethylammonium bromide and then almost constant value of surface tension was observed. Also, the surface tension decreases with addition of salts. The surface tension of cetyltrimethylammonium bromide is found less in presence of KCl than NaCl in aqueous media. In presence of monovalent salts, the critical micelle concentration (cmc) value decreases which is explained on the basis of the orientation of the surfactant and reduction of the free energy of the surface, thus decreasing surface tension. The graphs of surface tension versus concentration are used in determining the critical micelle concentration (cmc). BIBECHANA 10 (2014) 52-57 DOI: http://dx.doi.org/10.3126/bibechana.v10i0.9311

Investigation of the Inhibitive Effect of Hexatriethanolamine Derivatives on Corrosion of Carbon Steel Pipelines in 1M HCI

2013 ◽  
Vol 787 ◽  
pp. 216-221
Author(s):  
Omnia A.A. El-Shamy ◽  
Abdullah S. Al-Ayed
Keyword(s):  
Surface Tension ◽  
Carbon Steel ◽  
Critical Micelle Concentration ◽  
Surface Area ◽  
Corrosion Inhibition ◽  
Surface Activity ◽  
Inhibition Efficiency ◽  
Surface Excess ◽  
Corrosion Inhibition Efficiency ◽  
Minimum Surface Area

The corrosion inhibition efficiency of carbon steel pipelines in 1M HCl by the synthesized hexatriethyleneamine derivatives potensiodynamic polarization 30 oC. The results showed that all synthesized inhibitors were good inhibitors and their inhibition efficiencies were significantly increased with increasing concentration. The surface activity were calculated from its surface tension measurements including the critical micelle concentration (CMC), effectiveness of surfactant (π), maximum surface excess (Γmax) and the minimum surface area (Amin).

Effectiveness of some Nonionic Surfactants As Corrosion Inhibitors for Carbon Steel in Hydrochloric Acid Solution

2013 ◽  
Vol 787 ◽  
pp. 211-215 ◽  
Author(s):  
Omnia A.A. El-Shamy
Keyword(s):  
Surface Tension ◽  
Carbon Steel ◽  
Hydrochloric Acid ◽  
Critical Micelle Concentration ◽  
Corrosion Inhibitors ◽  
Nonionic Surfactants ◽  
Steel Corrosion ◽  
Surface Excess ◽  
Compound I ◽  
Minimum Surface Area

The corrosion inhibition characteristics of the synthesized (I, II and III) nonionic surfactants on carbon steel corrosion in 1 M acid chloride have been investigated at 30 oC by potensiodynamic polarization. The obtained results show that compound I has the best efficiency at concentration 0.08 mmol/L while compound III is the best inhibitor at higher concentrations. The surface parameters of each synthesized surfactant were calculated from its surface tension including the critical micelle concentration (CMC), effectiveness of surfactant (π), maximum surface excess (Γmax) and the minimum surface area (Amin).

scholarly journals Surface adsorption and thermodynamic properties of mixed system of ionic liquid surfactants with cetyltrimethyl ammonium bromide

RSC Advances ◽  
2017 ◽  
Vol 7 (81) ◽  
pp. 51426-51435 ◽  
Author(s):  
Li Qin ◽  
Xin-Hong Wang
Keyword(s):  
Surface Tension ◽  
Ionic Liquid ◽  
Surface Adsorption ◽  
Mixed System ◽  
Ammonium Bromide ◽  
Conductivity Measurements ◽  
Cetyltrimethyl Ammonium Bromide ◽  
Surface Active ◽  
Effects Of Temperature ◽  
Cetyltrimethyl Ammonium

The effects of temperature and concentration of CTAB added to imidazolium-based ionic liquids (CnmimBr, n = 10, 12, 16) were investigated, and surface active parameters and aggregation of these surfactants were explored by surface tension and conductivity measurements.

On the defects of enamel coatings

2019 ◽  
pp. 145-150
Author(s):  
T. O. Soshina ◽  
V. R. Mukhamadyarovа
Keyword(s):  
Heat Treatment ◽  
Surface Tension ◽  
Electron Microscope ◽  
Enamel Coating ◽  
Surface Defects ◽  
Linear Expansion ◽  
Corrosion Properties ◽  
Treatment Conditions ◽  
Mechanical And Corrosion Properties ◽  
Coefficient Of Linear Expansion

The defects destroy the integrity of the enamel, and the paper examines the influence of the physical-mechanical and corrosion properties of frits and heat treatment on the defectiveness of the enamel coating. The surface defects were scanned by electron microscope. It has been established that the defectiveness of enamel coatings depends on the melting index, temperature coefficient of linear expansion, surface tension of the frits, and heat treatment conditions. When burning rate of the enamel coating decreases, the fine-meshed structure of the enamel changes, and the size of the defects decreases.

Structure and Conductivity of Iodine-Doped C60 Thin Films

1994 ◽  
Vol 359 ◽  
Author(s):  
Jun Chen ◽  
Haiyan Zhang ◽  
Baoqiong Chen ◽  
Shaoqi Peng ◽  
Ning Ke ◽  
...  
Keyword(s):  
Thin Films ◽  
Electrical Conductivity ◽  
Room Temperature ◽  
Conductivity Measurements ◽  
X Ray Diffraction ◽  
Temperature Conductivity ◽  
Room Temperature Conductivity ◽  
X Ray ◽  
Thermally Activated ◽  
Order Of Magnitude

ABSTRACTWe report here the results of our study on the properties of iodine-doped C60 thin films by IR and optical absorption, X-ray diffraction, and electrical conductivity measurements. The results show that there is no apparent structural change in the iodine-doped samples at room temperature in comparison with that of the undoped films. However, in the electrical conductivity measurements, an increase of more that one order of magnitude in the room temperature conductivity has been observed in the iodine-doped samples. In addition, while the conductivity of the undoped films shows thermally activated temperature dependence, the conductivity of the iodine-doped films was found to be constant over a fairly wide temperature range (from 20°C to 70°C) exhibiting a metallic feature.

Surface active properties at the air–water interface of β-casein and its fragments derived by plasmin proteolysis

1989 ◽  
Vol 56 (3) ◽  
pp. 487-494 ◽  
Author(s):  
Michael Wilson ◽  
Daniel M. Mulvihill ◽  
William J. Donnelly ◽  
Brian P. Gill
Keyword(s):  
Surface Tension ◽  
Water Interface ◽  
Active Protein ◽  
Drop Volume ◽  
V Protein ◽  
Proteose Peptone ◽  
Rate Determining Step ◽  
Surface Active Properties ◽  
Air Water Interface ◽  
Surface Active

Summaryβ-Casein, was enzymically modified by incubation with plasmin to yield γ-caseins and proteose peptones. Whole γ-, γ1-, γ2/γ3-caseins and whole proteose peptone (pp) were isolated from the hydrolysate mixture. The time dependence of surface tension at the air-water interface of solutions of β-casein and its plasmin derived fragments, at concentrations of 10−1 to 10−4% (w/v) protein, pH 7.0, was determined, at 25 °C, using a drop volume apparatus. The ranking of the proteins with respect to rate of reduction of surface tension, during the first rate determining step, at 10-2% (w/v) protein, was γ2/γ3 ≫ pp > whole γ- > γ1- > β-casein. The ranking of the proteins with respect to surface pressures attained after 40 min (π40) was concentration dependent. γ2/γ3-Caseins were found to be very surface active, decreasing surface tension rapidly and giving a high π40. γ1 Casein decreased surface activity somewhat faster than β-casein, but generally reached a lower π40. Whole γ-casein reflected the properties of both γ1 and γ2/γ3-caseins. Proteose peptone was found to decrease surface tension rapidly during the initial rate determining step; it gave a relatively high π40 at a bulk phase concentration of 10−3% (w/v) protein, but, it was the least surface active protein at 10−1 and 10−2% (w/v) protein.

The Chorionic Plastron and its Role in the Eggs of the Muscinae (Diptera)

1960 ◽  
Vol s3-101 (55) ◽  
pp. 313-332
Author(s):  
H. E. HINTON
Keyword(s):  
Surface Tension ◽  
High Pressures ◽  
Middle Layer ◽  
Clean Water ◽  
Active Materials ◽  
Great Resistance ◽  
Plane Normal ◽  
Air Interface ◽  
Surface Active ◽  
Egg Shell

In flies of the subfamily Muscinae the egg-shell has both an outer and an inner meshwork layer, each of which holds a continuous film of air. Between these two meshwork layers there is a more or less thick middle layer to which the shell chiefly owes its mechanical strength. Holes or aeropyles through the middle layer effect the continuity of the outer and inner films of air. Both meshwork layers consist of struts that arise perpendicularly from the middle layer. In both layers the struts are branched at their apices in a plane normal to their long axes. These horizontal branches form a fine and open hydrofuge network that provides a large water-air interface when the egg is immersed. When it rains or when the egg is otherwise immersed in water, the film of air held in the outer meshwork layer of the shell funtions as a plastron. To be an efficient respiratory structure a plastron must resist wetting by both the hydrostatic pressures and the surface active materials to which it is normally exposed. The plastrons of all the Muscinae tested resist wetting in clean water by pressures far in excess of any they are likely to encounter in nature. The resistance of a plastron to hydrostatic pressures varies directly as the surface tension of the water, and the surface tension of water in contact with the decomposing materials in which the Muscinae lay their eggs is much lowered by surface active materials. These considerations seem to provide an explanation for the great resistance of the plastron of the Muscinae to wetting by excess pressures and for the paradox that the plastrons of these terrestrial eggs are more resistant to high pressures than are the plastrons of some aquatic insects that live in clean water.

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