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Experimental study of surfactant retention on kaolinite clay / Y. Wu in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 48, N° 5 (09-10/2011)
[article]
Titre : Experimental study of surfactant retention on kaolinite clay Type de document : texte imprimé Auteurs : Y. Wu, Auteur ; S. Iglauer, Auteur ; P. Shuler, Auteur ; Y. Tang, Auteur ; W. A. Goddard, Auteur Année de publication : 2011 Article en page(s) : p. 346-358 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Huiles et graisses -- Absorption
Kaolinite
SurfactantsTags : 'Conservation agent tensio-actif' 'Argile kaolinite' Surfactant 'Récupération améliorée huile' 'Mécanisme rétention' Index. décimale : 668.1 Agents tensioactifs : savons, détergents Résumé : We measured equilibrium surfactant retention on kaolinite clay for a large array of surfactants. We demonstrate that the mass balance measurements we used are a rapid way to screen surfactants in terms of their potential to be used in enhanced oil recovery applications. Surfactant classes investigated include: alkyl(aryl) sulfonates, ethylene oxide-propylene oxide copolymers, ethoxylated alkylphenols, alkyl polyglucosides, sorbitan ester ethoxylates, alkyl alcohol propoxylated sulfate sodium salts, gemini surfactants, sulfosuccinates and organo siliconeethylene oxide-propylene oxide terpolymers. We identified several surfactants which had zero retention under the test conditions and which may therefore be suitable as enhanced oil recovery chemicals in surfactant flooding schemes. We discuss surfactant retention mechanisms on kaolinite clay and analyze surfactant structure-retention relationships for several surfactant classes. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12548
in TENSIDE, SURFACTANTS, DETERGENTS > Vol. 48, N° 5 (09-10/2011) . - p. 346-358[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 13302 - Périodique Bibliothèque principale Documentaires Disponible Urea fertilizer coated with biodegradable polymers and diatomite for slow release and water retention / Jean Felix Mukerabigwi in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 12, N° 6 (11/2015)
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Titre : Urea fertilizer coated with biodegradable polymers and diatomite for slow release and water retention Type de document : texte imprimé Auteurs : Jean Felix Mukerabigwi, Auteur ; Qing Wang, Auteur ; Xiaoya Ma, Auteur ; Min Liu, Auteur ; Shaojun Lei, Auteur ; Haitao Wei, Auteur ; Xueying Huang, Auteur ; Yu Cao, Auteur Année de publication : 2015 Article en page(s) : p. 1085-1094 Note générale : Bibliogr. Langues : Américain (ame) Tags : 'Water retention' 'Slow release fertilizer' 'Coating material' Diatomite Biopolymer Urea Index. décimale : 667.9 Revêtements et enduits Résumé : Slow release fertilizers (SRFs) are of vital importance to improve agricultural efficiency. However, their use is still limited due to their relatively high costs. Additionally, most of coating materials used to produce SRFs are nonbiodegradable and toxic to the soil. In this context, we utilized various biopolymers such as tamarind, xanthan, and guar gums together with diatomite to coat urea fertilizer granules. In this study, tamarind–urea-diatomite (TUD), guar–urea-diatomite (GUD), and xanthan–urea-diatomite (XUD) SRF granules were prepared in the presence of epichlorohydrin as crosslinker. The nutrients slow release behavior and the water retention capacity of these SRFs in soil were determined. The water absorbency of the product was 89% TUD, 93% GUD, and 142% XUD of its own weight when it was allowed to swell in tap water at room temperature for 2 h. Poly(methacrylic acid) was applied as the outermost layer of XUD to improve the nitrogen slow release efficiency of XUD SRFs. The results showed that the product had an excellent nutrients slow release property of 79.5% and good water retention capacity of 62.9% after 28 days. This suggested that XUDM could effectively improve the utilization of fertilizer. Furthermore, being biodegradable and low cost could be beneficial in agricultural and horticultural applications. Note de contenu : - MATERIALS AND METHODS : Materials - Xanthan gum, tamarind gum, and guar gum viscosity measurement - Preparation of TUD, GUD, and XUD SRF granules - Characterization of the prepared coated urea SFRs - Measurement of water absorbency of TUD, GUD, and XUD SRFs - Slow release behavior of TUD, GUD, and XUD SRFs in soil - Slow release behavior of TUD, GUD, and XUD SRFs in soil - Largest water-holding ratio of soil with TUD, GUD, or XUD SRFs - Measurement of water retention of TUD, GUD, and XUD SRFs - Preparation of enhanced properties efficiency of XUD SRFs
- RESULTS AND DISCUSSION : Morphology and characteristics of the coated fertilizers - Polysaccharides viscosity test result - Water absorbency of TUD, GUD, and XUD SRFs test results - Water retention of TUD, GUD, and XUD SRFs in soil - Largest water-holding ratio of soil with TUD, GUD, or XUD SRFs test results - Slow release behavior of TUD, GUD, and XUD SFRs in soil test results - XUD SRFs enhanced properties by applying PMAA as outermost layerDOI : 10.1007/s11998-015-9703-2 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-015-9703-2.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24967
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 12, N° 6 (11/2015) . - p. 1085-1094[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 17585 - Périodique Bibliothèque principale Documentaires Disponible A highly sensitive method to determine the washing resistance of artificial hair colors / Erik Schulze zur Wiesche in IFSCC MAGAZINE, Vol. 11, N° 2 (04-05/2008)
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Titre : A highly sensitive method to determine the washing resistance of artificial hair colors Type de document : texte imprimé Auteurs : Erik Schulze zur Wiesche, Auteur ; Siglinde Erpenbach, Auteur Année de publication : 2008 Article en page(s) : p. 139-142 Note générale : Bibliogr. Langues : Anglais (eng) Tags : 'Color fading' protection' retention' 'Hair color resistance' wash simulation' Résumé : Due to the improved performance of modern hair colorants, the high natural variability in hair qualities and the individual influences of manual product applications, colour care effects of cosmetic treatments are very difficult to detect. A new, highly sensitive test method to study the colour fading behaviour of human hair was established for a large variety of cosmetic treatments. This method is based on an automatic multistage application of standard wool tissues combined with automatic colour evaluation by means of CIE L × a × b × measurements (DIN 5033). The delta E values are the main interest because they include all information regarding the L (black vs. white), a (red-green) and b (blue-yellow) axes defined in the Hunter Lab colour space. For validation of this new method, different permanent and non-permanent hair colour shades were applied to undamaged light brown Caucasian hair strands. The hair strands were washed manually stepwise 30 times and the colour loss compared with the results obtained on wool tissues using an automatic application system. For most of the investigated hair colours, a coefficient of determination of r2 > 0.99 was achieved. Modern permanent hair colours show a high resistance to cosmetic treatments. Over 90% of the initial colour result was retained after 30 product applications. Shampoo and conditioner formulations induce different degrees of colour loss in hair. In basic formulas significant influences of single surfactants could be detected. The new method using wool tissues correlates very well with that using manually washed Caucasian hair strands. This automatic method is very time-effective and offers an excellent reproducibility with a high sensitivity for assessing product influences on artificial hair colours. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=10374
in IFSCC MAGAZINE > Vol. 11, N° 2 (04-05/2008) . - p. 139-142[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 010540 - Périodique Bibliothèque principale Documentaires Disponible