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Bis (diquaternary ammonium)salts : synthesis, effect of spacer on surface activities and aggregation properties of reactive red 198 in aqueous – surfactants solutions / Fatma H. Abdel-Salam in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 48, N° 3/2011 (05/2011)
[article]
Titre : Bis (diquaternary ammonium)salts : synthesis, effect of spacer on surface activities and aggregation properties of reactive red 198 in aqueous – surfactants solutions Type de document : texte imprimé Auteurs : Fatma H. Abdel-Salam, Auteur ; A. G. El-Said, Auteur Année de publication : 2011 Article en page(s) : p. 239-248 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Ammoniums quaternaires
Chimie des surfaces
Colorants réactifs
Précipitation (chimie)
SurfactantsTags : Synthèse 'Surfactants gémini cationiques' 'Propriétés surface' Aggrégation 'Comportement pigment réactif rouge 198' (RR 198) Index. décimale : 668.1 Agents tensioactifs : savons, détergents Résumé : A series of bis-diquaternary ammonium salts (cationic Gemini surfactants) with different length in spacer were prepared and characterized. The surface properties such as the critical micelle concentration CMC, minimum surface tension γCMC, effectiveness of the surface tension reduction πCMC, maximum surface excess Γmax and surface area per molecule Amin have been determined by means of surface tension measurements. As expected, these surfactants have good surface activities than those conventional monomeric ones (dodecyl trimethyl ammonium chloride (DTAC)) and the spacer plays an important role in the surface properties. Under experimental conditions, surface parameters decreases with the increase of carbon number of the spacer the except analogue with a benzene ring due to its inflexibility. The aggregation ability of some practically used reactive azodyes (C. I. Reactive Red 198) in aqueous solutions and the prepared surfactants was investigated using UV-visible spectroscopic methods. The spectroscopic studies were extended in order to determine the effect of molecular structure of the surfactants on the aggregative properties of C. I. Reactive Red 198 (RR 198). The aggregation behaviour of the RR 198 in solutions and in the presence of additives is related to their apparent deviations from Beer’s law and aggregation number (N). The aggregation constant (Kn) of the monomer/dimer equilibrium was calculated. The aggregate structures and the nature of the interacting pairs in this dye were discussed using Kasha exciton theory. Note de contenu : - EXPERIMENTAL PROCEDURES : Materials - Methods - Synthesis - Measurements.
- RESULTS AND DISCUSSION : Structure characterization - Critical micelle concentration (CMC) - Adsorption on the air/solution interface - Aggregation of RR 198 under different concentration in aqueous solution - Aggregative properties of RR 198 dye in aqueous-surfactant solution - Molecular excitation of dimer structure of RR 198.Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11706
in TENSIDE, SURFACTANTS, DETERGENTS > Vol. 48, N° 3/2011 (05/2011) . - p. 239-248[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 012974 - Périodique Bibliothèque principale Documentaires Disponible Effect of calcium ions Cconcentration on the foaming power of anionic surfactants / L. Cohen in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 46, N° 6/2009 (11-12/2009)
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Titre : Effect of calcium ions Cconcentration on the foaming power of anionic surfactants Type de document : texte imprimé Auteurs : L. Cohen, Auteur ; F. Soto, Auteur ; E. Sanchez, Auteur Année de publication : 2009 Article en page(s) : p. 352-356 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Calcium
Mousse (chimie)
Sulfonates
SurfactantsTags : 'Phi-sulfonate de méthylester' 'Surfactants anioniques' 'Eau dure' Mousse Index. décimale : 668.1 Agents tensioactifs : savons, détergents Résumé : Water solutions based on the novel surfactant sulfoxylated methyl ester (phi-MES C16) have been studied and compared to two leading types of surfactants used today : linear alkylbezene sulfonate (LAS) and secondary alkane sulfonate(SAS) with regard to foaming power. This work describes the foam height related experimental results carried out according to the Ross Miles test where either the anionic concentration and water hardness have been varied alternatively. The experimental results obtained indicate that [Anionic]/[Ca2+] ratio strongly influences foam height and that phi-MES C16 is superior to LAS and SAS. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=6809
in TENSIDE, SURFACTANTS, DETERGENTS > Vol. 46, N° 6/2009 (11-12/2009) . - p. 352-356[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 011757 - Périodique Bibliothèque principale Documentaires Disponible Micellization of gemini surfactants in polymer solutions / D. Tikariha in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 47, N° 3/2010 (24/05/2010)
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Titre : Micellization of gemini surfactants in polymer solutions Type de document : texte imprimé Auteurs : D. Tikariha, Auteur ; K. K. Ghosh, Auteur ; P. Quagliotto, Auteur Année de publication : 2010 Article en page(s) : p. 162-165 Note générale : Bibliogr. Langues : Anglais (eng) Tags : 'Surfactants Gemini' Micellisation 'Effet solvant' 'Polymère en solution' Index. décimale : 668.1 Agents tensioactifs : savons, détergents Résumé : The micellization behavior of three cationic gemini surfactants, C16H33N+(CH3)2(CH2)SN+(CH3)2C16H33, 2Br– (s = 4, 6, 10) have been studied in the presence of 1% (w/v) and 5% (w/v) polyethylene glycol-600 (PEG-600) by conductivity measurements at 300–320 K. From the conductivity data the critical micelle concentration, the degree of counterion ionization (α) and the thermodynamics of micellization ΔGo m, ΔHo m, ΔSo m, of the gemini surfactants have been determined. The micellar parameters show a significant dependence on the spacer length and as well as amount of polymer. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9466
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Code-barres Cote Support Localisation Section Disponibilité 012189 - Périodique Bibliothèque principale Documentaires Disponible Nonionic surfactants : an overview / D. Bajpai in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 47, N° 3/2010 (24/05/2010)
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Titre : Nonionic surfactants : an overview Type de document : texte imprimé Auteurs : D. Bajpai, Auteur ; V. K. Tyagi, Auteur Année de publication : 2010 Article en page(s) : p. 190-196 Note générale : Bibliogr. Langues : Anglais (eng) Tags : 'Surfactants non-ionique' 'Concentration micellaire critique' Amphiphile' Formulation Blanchisserie Mouillage Index. décimale : 668.1 Agents tensioactifs : savons, détergents Résumé : Nonionic surfactants do not produce ions in aqueous solution. As a consequence, they are compatible with other types of surfactants and are excellent candidates to enter complex mixtures, as found in many commercial products. Nonionic surfactants are found today in a large variety of domestic and industrial products, such as powdered or liquid formulations. This review paper describes the history, properties, types and uses of nonionic surfactants. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9471
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Code-barres Cote Support Localisation Section Disponibilité 012189 - Périodique Bibliothèque principale Documentaires Disponible Photosynthesis-inhibiting effects of cationic biodegradable gemini surfactants / K. Kràl'ovà in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 47, N° 5/2010 (09-10/2010)
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Titre : Photosynthesis-inhibiting effects of cationic biodegradable gemini surfactants Type de document : texte imprimé Auteurs : K. Kràl'ovà, Auteur ; F. Sersen, Auteur ; F. Devinsky, Auteur ; I. Lacko, Auteur Année de publication : 2010 Article en page(s) : p. 288-295 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Surfactants Tags : 'Surfactants gemini' 'Chlorella vulgaris' 'Dérivés des diamides de l'acide succinique' 'Inhibition transport photosynthétique d'électron' Chloroplastes Index. décimale : 668.1 Agents tensioactifs : savons, détergents Résumé : Cationic biodegradable gemini surfactants 3,8-diaza-4,7-dioxodecane-1,10-diylbis(alkyldimethylammonium bromide) (I) with R = C9H19–C18H37 inhibited photosynthetic electron transport (PET) in spinach chloroplasts and reduced chlorophyll (Chl) content in Chlorella vulgaris. The inhibitory effects of I intensively depended on the length of alkyl chain showing quasi-parabolic (Chlorella vulgaris) or bilinear (PET) course. IC50 value related to reduction of Chl content in C. vulgaris for dodecyl derivative was 0.6 × 10–6 mol dm–3 indicating its strong anti-algal effect. Using EPR spectroscopy as the site of inhibitory action of I in the photosynthetic apparatus the intermediates Z* and D* or their close surroundings were determined. As a further target of I inhibitory action the manganese cluster occurring on the donor side of photosystem II was estimated. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9954
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Code-barres Cote Support Localisation Section Disponibilité 012471 - Périodique Bibliothèque principale Documentaires Disponible Properties of microemulsions with mixed nonionic surfactants and mint oil / Monzer Fanun in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 47, N° 3/2010 (24/05/2010)
PermalinkReverse phase HPLC analysis of commercial surfactants used as melt additives / V. M. Datla in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 47, N° 3/2010 (24/05/2010)
PermalinkSynthesis and interfacial properties of novel imidazoline gemini surfactants / W. Li in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 49, N° 1 (01-02/2012)
PermalinkSynthesis and properties of some N-acylethylenediamine triacetic acid chelating surfactants / M. M. A. El-Sukkary in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 48, N° 1/2010 (01-02/2011)
PermalinkSynthesis, characterization, and kinetic study of two new cationic surfactants / Mohammad Edrissi in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 48, N° 4/2011 (07-08/2011)
PermalinkWith green credentials / Ronald Klagge in EUROPEAN COATINGS JOURNAL (ECJ), N° 07-08/2010 (07-08/2010)
PermalinkClouding and aggregation behavior of PPO-PEO-PPO triblock copolymer (pluronic® 25R4) in surfactant additives environment / Rakesh Sharma in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 49, N° 2 (03-04/2012)
PermalinkImproved scrub resistance and alkaline stabilité / Lee Dongchul in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 200, N° 4546 (03/2010)
PermalinkMicellization and interfacial behaviour of amitriptyline-nonionic surfactant systems in aqueous medium / Kabir-ud-Din in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 47, N° 5/2010 (09-10/2010)
PermalinkPhysicochemical properties of cetyltributylphosphonium bromide in the presence of additives / D. Tikariha in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 48, N° 4/2011 (07-08/2011)
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