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Reversible performance of dodecyl tetramethyl guanidine solution induced by CO2 trigger / Y. Qin in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 46, N° 5/2009 (09-10/2009)
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Titre : Reversible performance of dodecyl tetramethyl guanidine solution induced by CO2 trigger Type de document : texte imprimé Auteurs : Y. Qin, Auteur ; H. Yang, Auteur ; J. Ji, Auteur ; S. Yao, Auteur ; Y. Kong, Auteur ; Y. Wang, Auteur Année de publication : 2009 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Composés amphiphiles
Dioxyde de carbone
Emulsions
Mousse (chimie)
SurfactantsTags : Surfactants amphiphiles Dioxyde carbone Emulsion inverse Index. décimale : 668.1 Agents tensioactifs : savons, détergents Résumé : Dodecyl tetramethyl guanidine (DTMG) were synthesized and characterized, and its reversible performance was studied. The results showed that DTMG could form bicarbonate ionic adduct after exposed to CO2, so it could be used as CO2 switchable surfactants. By bubbling CO2 through DTMG solution or heating COZ saturated DTMG solution, the alkali and surface active properties of solution was changed reversibly. Emulsion and foam stabilized by DTMG could be controlled between stable and unstable state by CO2. In addition, the state of DTMG solution was easy to be distinguished by naked eye through a simple indicator, phenolphthalein. Pink indicated it was inactive, and colorless indicated it was active. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=6250
in TENSIDE, SURFACTANTS, DETERGENTS > Vol. 46, N° 5/2009 (09-10/2009)[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 011608 - Périodique Bibliothèque principale Documentaires Disponible Synthesis and characterization of mesoporous alumina-zirconia as catalyst support for suzuki coupling reaction / J. Ji in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 49, N° 1 (01-02/2012)
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Titre : Synthesis and characterization of mesoporous alumina-zirconia as catalyst support for suzuki coupling reaction Type de document : texte imprimé Auteurs : J. Ji, Auteur ; K. Zhang, Auteur ; Y. Qin, Auteur ; Y. Kong, Auteur ; S. Li, Auteur ; Y. Wang, Auteur Année de publication : 2012 Article en page(s) : p. 43-47 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Alumine
Caractérisation
Composés inorganiques -- Synthèse
Copolymères séquencés
Matériaux mésoporeux
Réaction de couplage
Surfactants
ZirconiumIndex. décimale : 668.1 Agents tensioactifs : savons, détergents Résumé : One pot facile synthesis of ordered mesoporous alumina-supported zirconia with high thermal stability and large pore sizes by evaporation-induced method was systematically investigated. The strategy based on a sol-gel process associated with nonionic triblock copolymers PPO-PEO-PPO as templates in ethanolic solution. Small-angle XRD, TEM, and nitrogen adsorption and desorption results showed that these composites possessed an ordered 2D hexagonal mesostructure, resisted to high temperature up to 1000°C, and had large surface areas and narrow poresize distributions. Loaded with palladium, the mesoporous alumina-zirconia composite exhibited high catalytic activity in Suzuki coupling of 2-bromotoluene with phenylboronic acid. Note de contenu : - EXPERIMENTAL : Materials - Synthesis - Characterizations
- RESULTS AND DISCUSSION : Preparation and characterization of mesoporous Al2O3-ZRO2 supports - Catalysis activity of Pd/Al2O3-ZRO2 catalystPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=13323
in TENSIDE, SURFACTANTS, DETERGENTS > Vol. 49, N° 1 (01-02/2012) . - p. 43-47[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 13561 - Périodique Bibliothèque principale Documentaires Disponible