Physiochemical Properties of Hydroxy Mixed Ether HMEn Surfactants and their Interaction with Sodium Dodecyl Sulfate SDS / R. Abdel-Rahem in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 46, N° 2/2009 (02-03/2009)

[article]  inTENSIDE, SURFACTANTS, DETERGENTS > Vol. 46, N° 2/2009 (02-03/2009) . - p. 105-111 Titre : Physiochemical Properties of Hydroxy Mixed Ether HMEn Surfactants and their Interaction with Sodium Dodecyl Sulfate SDS Type de document : texte imprimé Auteurs : R. Abdel-Rahem, Auteur ; A. S. Ayesh, Auteur Année de publication : 2009 Article en page(s) : p. 105-111 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Adsorption Microscopie à force atomique Sodium -- Composés organiques Surfactants Index. décimale : 668.1 Agents tensioactifs : savons, détergents Résumé : This paper is focused on the phase behavior, interaction with anionic surfactant sodium dodecyl sulfate SDS, adsorption and wetting investigations of new hydroxy mixed ether nonionic surfactants HMEn. The phase diagrams of (0.1–100) %wt of HMEn (n-value is the ethoxylation number EO) at the temperature range 20–100°C have shown that the increasing of n-value raises the cloud boundary toward higher temperature. Remarkable result was obtained from the interaction between SDS and HMEB, at which the mixed system exhibits a unique homogeneity and a liquid crystal phase formation. Macroscopically, the liquid crystal region was found when the SDS concentration range between 8 and 24 mM mixed with 10% wt HMEB. The interaction between HMEn and mica was also investigated using atomic force microscopy AFM and a pronounced adsorption of HMEn on mica was observed. Moreover, contact angle results reveal that glass substrate shows strong wettability of HMEn surfactant solutions compared with polyethylene PE and polymethylmethaacrylate PMMA substrates. This wettability however also decreases with EO number. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=4579 [article]

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Study of adsorption of sodium dodecyl sulfate on alumina using surfactant Ion-selective electrode / B.-X. Liu in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 45, N° 4/2008 (07-08/2008)

[article]  inTENSIDE, SURFACTANTS, DETERGENTS > Vol. 45, N° 4/2008 (07-08/2008) . - p. 182-185 Titre : Study of adsorption of sodium dodecyl sulfate on alumina using surfactant Ion-selective electrode Type de document : texte imprimé Auteurs : B.-X. Liu, Auteur ; W.-X. Wang, Auteur ; Y. H. Lu, Auteur ; Z.-P. Du, Auteur Année de publication : 2008 Article en page(s) : p. 182-185 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Adsorption Alumine Sodium -- Composés organiques Surfactants Tags : Dodecyl  sulfate  sodium  Ion  sélectif  Electrode Index. décimale : 668.1 Agents tensioactifs : savons, détergents Résumé : The adsorption of sodium dodecyl sulfate (SDS) on alumina was studied by using the surfactant ion-selective electrode. The adsorbance could be calculated from the potential and concentration response characteristics of surfactant ion-selective electrode to get surfactant adsorption isotherm. Further experiment results show that the adsorbance was greatly influenced by pH of the solution. It is demonstrated that surfactant ion-selective electrode could be utilized to measure surfactant concentrations in solution after adsorption equilibrium without solid-liquid separation. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=2942 [article]

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The long-term stability of sodium percarbonate in presence of zeolite as measured by heat flow calorimetry / C. Johansson in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 44, N° 4/2007 (08-09/2007)

[article]  inTENSIDE, SURFACTANTS, DETERGENTS > Vol. 44, N° 4/2007 (08-09/2007) . - p. 210-217 Titre : The long-term stability of sodium percarbonate in presence of zeolite as measured by heat flow calorimetry Type de document : texte imprimé Auteurs : C. Johansson, Auteur ; P. Pekonen, Auteur ; D. Forsström, Auteur Année de publication : 2007 Article en page(s) : p. 210-217 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Agents de blanchiment Calorimétrie Peroxyde d'hydrogène Le peroxyde d'hydrogène (H2O2), communément appelé eau oxygénée ou encore perhydrol (appellation industrielle), est un composé chimique liquide et visqueux, aux puissantes propriétés oxydantes (il est aussi réducteur). C'est donc un agent blanchissant efficace qui sert de désinfectant et (à haute concentration) d'oxydant ou monergol dans les fusées spatiales. Sodium -- Composés organiques Sodium -- Composés organiques -- Stabilité Zéolites Tags : Sodium  percarbonate  15630-89-4 Index. décimale : 668.1 Agents tensioactifs : savons, détergents Résumé : Heat flow calorimetry has been evaluated as an alternative technique to conventional stability testing of sodium percarbonate [15630-89-4] (SPC) based on analysis of the hydrogen peroxide content. Stability tests were performed with different SPC samples as well as under various experimental conditions. In general, stable samples exhibiting high concentration of hydrogen peroxide were accompanied by low heat flow values. It was found that the results obtained by heat flow calorimetry and conventional stability testing were in agreement. It was also demonstrated that the long-term stability could be predicted from heat flow data obtained during the initial stage of decomposition. Furthermore, different manufacturing and experimental conditions were manifested as a change of the heat flow curve. The results indicate that the rate of heat production is closely associated with the stability of sodium percarbonate, i.e. the rate of decomposition of sodium percarbonate. In presence of zeolite the stability of sodium percarbonate was reduced, particularly under humid conditions. DOI : 10.3139/113.100340 Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3207 [article]

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