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Alkyl polyglycoside/1-Naphthol formulations : a case study of surfactant enhanced oil recovery / S. Iglauer in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 48, N° 2/2011 (03-04/2011)

[article]  inTENSIDE, SURFACTANTS, DETERGENTS > Vol. 48, N° 2/2011 (03-04/2011) . - p. 121-126 Titre : Alkyl polyglycoside/1-Naphthol formulations : a case study of surfactant enhanced oil recovery Type de document : texte imprimé Auteurs : S. Iglauer, Auteur ; Y. Wu, Auteur ; P. Shuler, Auteur ; Y. Tang, Auteur ; W. A. Goddard, Auteur Année de publication : 2011 Article en page(s) : p. 121-126 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Alkyl polyglycosides Formulation (Génie chimique) Huiles et graisses Naphtols solvants Surfactants Tension superficielle Index. décimale : 668.1 Agents tensioactifs : savons, détergents Résumé : We present a case study of surfactant enhanced oil recovery using Alkyl polyglucoside/1-naphthol formulations. Alkyl polyglucosides are a green, non-toxic and renewable surfactant class synthesized out of agricultural raw materials. We measured interfacial tensions versus n-octane and viscosities of these formulations and conducted one coreflood enhanced oil recovery (EOR) experiment where we recovered 82.6 % of initial oil in place demonstrating that these formulations are efficient EOR agents. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11119 [article]

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5-(3-bromo-4-hydroxy-5-methoxyphenyl)-7,7-dimethyl-7H-indolo[1,2-a]quinolinium perchlorate as a new indicator for anionic surface active agents determination / Elwira Katarzyna Wroblewska in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 48, N° 2/2011 (03-04/2011)

[article]  inTENSIDE, SURFACTANTS, DETERGENTS > Vol. 48, N° 2/2011 (03-04/2011) . - p. 127-129 Titre : 5-(3-bromo-4-hydroxy-5-methoxyphenyl)-7,7-dimethyl-7H-indolo[1,2-a]quinolinium perchlorate as a new indicator for anionic surface active agents determination : Part II. influence of pH on the titration results Type de document : texte imprimé Auteurs : Elwira Katarzyna Wroblewska, Auteur ; M. Gasiorowska, Auteur Année de publication : 2011 Article en page(s) : p. 127-129 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Bromure de dimidium Colorants Détergents pH Solvatochromisme Volumétrie (chimie analytique) Index. décimale : 668.1 Agents tensioactifs : savons, détergents Résumé : The work refers to the already published modification of widely used method for anionic active agents determination which concerns the replacement of the mixed indicator, consisting of Acid Blue 1 and carcinogenic Dimidium Bromide, applied in the International Standard ISO 2271:1989 with solvatochromic dye i.e. 5-(3-bromo-4-hydroxy-5-methoxyphenyl)-7,7-dimethyl-7H-indolo[1,2-a]quinolinium perchlorate (1). The value of pKa for examined dye (1) amounts to 6.59 thus the influence of different pH values of the probes on the analysis results was studied i.e. precision of determination of titration endpoint and the same the result of the quantitative analysis. The change of pH for aqueous and apparent pH for organic phase were determined during the titration process. It was shown that there is no effect of the pH change in its range varying from 3.5 to 5 on the results. The modification of the method for the probes which pH do not fit to the range mentioned above is presented. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11120 [article]

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Kinetics and adsorption isotherms for the removal of tartrazine from aqueous solution by coal ash / M. Ishaq in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 48, N° 2/2011 (03-04/2011)

[article]  inTENSIDE, SURFACTANTS, DETERGENTS > Vol. 48, N° 2/2011 (03-04/2011) . - p. 130-133 Titre : Kinetics and adsorption isotherms for the removal of tartrazine from aqueous solution by coal ash Type de document : texte imprimé Auteurs : M. Ishaq, Auteur ; K. Saeed, Auteur ; S. Nadeem, Auteur Année de publication : 2011 Article en page(s) : p. 130-133 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Adsorption Charbon, Cendres de Cinétique chimique Séparation (technologie) Tartrazine Index. décimale : 668.1 Agents tensioactifs : savons, détergents Résumé : The coal ash (Φ) was used as an adsorbent for the removal of tartrazine from aqueous solution at room temperature. The adsorption capacity of tartrazine increased as the adsorption time was increased and then remains constant after 30 min adsorption duration. It was found that the U removed more than 40% of tartrazine from the aqueous solution within 1 h contact time. The equilibrium adsorption was also analyzed by Langmuir isotherm and it was found that the data followed the Langmuir isotherm models. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11121 [article]

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Removal of triphenylmethane dye from aqueous solution by carbonaceous adsorbent / S. Alam in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 48, N° 2/2011 (03-04/2011)

[article]  inTENSIDE, SURFACTANTS, DETERGENTS > Vol. 48, N° 2/2011 (03-04/2011) . - p. 134-142 Titre : Removal of triphenylmethane dye from aqueous solution by carbonaceous adsorbent Type de document : texte imprimé Auteurs : S. Alam, Auteur ; M. Mabood, Auteur ; M. Sadiq, Auteur ; Noor-ul-Amin, Auteur ; F. K. Bangash, Auteur Année de publication : 2011 Article en page(s) : p. 134-142 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Adsorption Charbon actif Cinétique chimique Triphénylméthane Index. décimale : 668.1 Agents tensioactifs : savons, détergents Résumé : Removal of acid blue 1 from aqueous solution on activated carbon produced from Salvadora oleoides was investigated. The samples were characterized by BET surface area, BJH pore volume and pore diameter, XRD, SEM, EDS and FTIR analysis. The surfaces contain functional groups like ketones and hydroxyl which disappeared at high activation temperature; relatively high amount of carbon w. r. t. oxygen was found with the increase in activation temperature; the increase in surface area and development of porous structures showed a positive effect on the adsorption capacity. Adsorption of the dye on carbon at 10 and 45°C showed that the first order, Bangham and Elovich and parabolic diffusion equations apply to the kinetic data. The adsorption rate increased with the temperature and with thermal activation of the sample. Thermodynamic parameters like ΔE≠, ΔH≠, ΔS≠ and ΔG≠ were calculated from the kinetic data. The negative values of ΔS≠ reflect decrease in the disorder of the system at the solid-solution interface during adsorption. Gibbs free energy (ΔG≠), which represents the driving force for the affinity of dye for the carbon, increased with the increase in activation temperature. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11122 [article]

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Nonequilibrium association of oppositely charged macromolecules and amphiphiles / R. Mészàros in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 48, N° 2/2011 (03-04/2011)

[article]  inTENSIDE, SURFACTANTS, DETERGENTS > Vol. 48, N° 2/2011 (03-04/2011) . - p. 143-147 Titre : Nonequilibrium association of oppositely charged macromolecules and amphiphiles Type de document : texte imprimé Auteurs : R. Mészàros, Auteur Année de publication : 2011 Article en page(s) : p. 143-147 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colloides Dispersions et suspensions Equilibre thermodynamique Polyélectrolytes Surfactants Index. décimale : 668.1 Agents tensioactifs : savons, détergents Résumé : Recently, a novel concept has been proposed to interpret the nonequilibrium character of oppositely charged polyelectrolyte/surfactant mixtures. According to this approach, at low surfactant-to-polyelectrolyte ratios the system is a thermodynamically stable solution. In a given composition range colloidal dispersions of the polyelectrolyte/surfactant nanoparticles are formed. In the presence of surfactant excess, the dispersions can be stabilised via the adsorption of the surfactant ions on the surface of the hydrophobic polyelectrolyte/surfactant nanoparticles. In the presence of polyelectrolyte excess, charge stabilised polyelectrolyte/surfactant dispersions might also be prepared if the charge of the macromolecules is large enough. These latter colloidal dispersions are stabilised by the uncompensated charges of the polyelectrolyte. The colloidal dispersion concept provides several options to control the formation of self-assemblies and the kinetic stability of the mixtures. In this paper, the effect of solution preparation protocols and different additives (including non-ionic polymers or surfactants) on the mentioned properties of oppositely charged macromolecule/surfactant systems is discussed. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11123 [article]

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Syntheses and properties of new double-tail trisiloxane surfactants with both hydrolysis resistance and high spreading ability / Z. Peng in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 48, N° 2/2011 (03-04/2011)

[article]  inTENSIDE, SURFACTANTS, DETERGENTS > Vol. 48, N° 2/2011 (03-04/2011) . - p. 148-153 Titre : Syntheses and properties of new double-tail trisiloxane surfactants with both hydrolysis resistance and high spreading ability Type de document : texte imprimé Auteurs : Z. Peng, Auteur ; Y. Liufu, Auteur ; L. Zhang, Auteur ; J. Chen, Auteur Année de publication : 2011 Article en page(s) : p. 148-153 Note générale : Bibliogr. Langues : Anglais (eng) Tags : 'Double  queue  de  trisiloxane'  'Capacité  propagation'  résistance  à  l'hydrolyse' Index. décimale : 668.1 Agents tensioactifs : savons, détergents Résumé : New double-tail trisiloxane surfactants of the general formula R1NR2CH2CH(OH)CH2O(CH2CH2O)xCH3 (R1=Me3SiOSiMe(CH2)3 · OSiMe3; R2=Me3SiOSiMe((CH2)3OCH2CH(OH)CH2)OSiMe3; x= 8.4, 12.9, 17.5, 22) have been synthesized. The spreading ability (SA) values of the double-tail trisiloxane surfactants solutions (1.0 × 10–3 mol/L) with average ethoxy units of 8.4, 12.9 and 17.5 on ficus microcarpa leave surface are more than 9 within 3 minutes, and their SA values on the parafilm surface are over 15 within 10 minutes at a concentration of 5.0 × 10–3 mol/L. In alkaline environment (pH = 10.0) the hydrolysis resistant ability (HRA) of the double-tail trisiloxane surfactant containing average ethoxy units of 8.4 with the surface tension of aqueous solution (1.0 × 10–3 mol/L) of less than 23 mN/m over 170 days, is far better than the others’. It is suggested that a more flexible spacer between hydrophobic groups and hydrophilic groups in double-tail trisiloxane surfactants molecules, not only can improve their SA on low-energy solid surfaces, but also improve their HRA. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11124 [article]

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Synthesis of some novel sulfonamide derivatives and investigating their biocidal activity in cooling towers / A. M. Badawi in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 48, N° 2/2011 (03-04/2011)

[article]  inTENSIDE, SURFACTANTS, DETERGENTS > Vol. 48, N° 2/2011 (03-04/2011) . - p. 154-159 Titre : Synthesis of some novel sulfonamide derivatives and investigating their biocidal activity in cooling towers Type de document : texte imprimé Auteurs : A. M. Badawi, Auteur ; D. E. Mohamed, Auteur ; A. A. Hafiz, Auteur ; S. M. Ahmed, Auteur ; Y. M. Gohar, Auteur ; E. A. Soliman, Auteur ; M. S. A. Sanan, Auteur Année de publication : 2011 Article en page(s) : p. 154-159 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Antimicrobiens Sulfonamides Tour de refroidissement Index. décimale : 668.1 Agents tensioactifs : savons, détergents Résumé : A novel series of dibenzothiophenedioxide sulphonamide derivatives were synthesized and tested as antimicrobial agents. The chemical structures of the prepared compounds were confirmed by micro elemental analysis, fourier transform infrared (FT-IR) and proton nuclear magnetic resonance spectroscopy (H-NMR). The surface parameters of two of the prepared compounds were determined at 35 °C including, surface tension, effectiveness, maximum surface excess and minimum surface area. Also the standard free energy of micellization and adsorption were recorded. The results showed that the prepared sulphonamides have good surface properties and effective antimicrobial activity against thirty three test organisms isolated from cooling towers. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11133 [article]

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Micellar characteristics and surface properties of some sulfobetaine surfactants / N. Singh in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 48, N° 2/2011 (03-04/2011)

[article]  inTENSIDE, SURFACTANTS, DETERGENTS > Vol. 48, N° 2/2011 (03-04/2011) . - p. 160-164 Titre : Micellar characteristics and surface properties of some sulfobetaine surfactants Type de document : texte imprimé Auteurs : N. Singh, Auteur ; K. K. Ghosh, Auteur Année de publication : 2011 Article en page(s) : p. 160-164 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Chimie des surfaces Formamide Micelles solvants Sulfobétaines Surfactants Zwitterions Un zwitterion (de l'allemand Zwitter — "hybride", "hermaphrodite » prononcé [tÍœsvɪtÉ›rjɔ̃]) est une espèce chimique moléculaire possédant des charges électriques formelles d’une unité, de signes opposés et situées en général sur des atomes non adjacents (dans le cas où les deux charges formelles sont portées par deux atomes adjacents, on parle d'ylures comme les ylures de phosphore). Les acides aminés, qui possèdent des groupements amine (sous forme d'ammonium NH3+ à pH =7) et acide carboxylique (sous forme de carboxylate COO- à pH =7) peuvent exister sous forme zwitterionique (à l'état solide, dans certaines gammes de pH en solution aqueuse) . Les bétaïnes sont d'autres exemples de zwitterions. Index. décimale : 668.1 Agents tensioactifs : savons, détergents Résumé : The micellar and interfacial properties of three sulfobetaine surfactants of the type CnH2n+1N+Me2(CH2)3SO3 – (n = 10; SB3-10 n = 12; SB3-12, n = 16; SB3-16) have been studied by conductometry and surface tension measurements. The critical micellar concentration (CMC), surface excess concentration (Γmax), minimum surface area per molecule of surfactant (Amin), Gibbs free energy of micellization (ΔG0m), Gibbs energy of transfer (ΔG0trans), the surface pressure at CMC (Ï€CMC) and the Gibbs energy of adsorption (ΔG0ads) of these surfactants have also been determined. Effect of formamide has been studied at higher temperature conductometrically. Results show that alkyl chain length and the amount of solvent composition influences micellization and surface properties of sulfobetaines. Increment in the CMC, ΔG0m and ΔG0trans, can be accounted for changes in the polarity of the bulk phase. Γmax, and Ï€cmc decreases where as Amin increases with increase in the organic solvent. It was also observed that micellization in water-formamide mixture was even slower than in the case of ethylene glycol. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11134 [article]

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Viscosity and percolative phenomena in AOT based microemulsions in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 48, N° 2/2011 (03-04/2011)

[article]  inTENSIDE, SURFACTANTS, DETERGENTS > Vol. 48, N° 2/2011 (03-04/2011) . - p. 165-168 Titre : Viscosity and percolative phenomena in AOT based microemulsions Type de document : texte imprimé Année de publication : 2011 Article en page(s) : p. 165-168 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Microémulsions Percolation Surfactants Viscosité Résumé : Present work includes experimental studies related to the viscosimetric behaviour of microemulsions that consist of three compounds: isooctane (organic phase), water (aqueous phase) and Aerosol OT (surfactant). The effect of the microemulsion composition, based on the ω parameter value, and the effect caused by the temperature have been analysed in this work. In relation to the influence of temperature and the use of microemulsions in different processes, one important characteristic of this kind of systems (the percolation phenomenon) must be taken into account in the discussion of the experimental results. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11135 [article]

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