A new class of labile surfactants that break down to non-surface active products upon heating or after a pre-set time, without the need for a pH change / M. Andersson in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 44, N° 6/2007 (12/2007)

[article]  inTENSIDE, SURFACTANTS, DETERGENTS > Vol. 44, N° 6/2007 (12/2007) . - p. 366-372 Titre : A new class of labile surfactants that break down to non-surface active products upon heating or after a pre-set time, without the need for a pH change Type de document : texte imprimé Auteurs : M. Andersson, Auteur ; A. Hillerström, Auteur ; A. Svensk, Auteur ; S. R. Younesi, Auteur ; E. Sjöström, Auteur ; I. Blute, Auteur ; Mikael Kjellin, Auteur ; J. Kizilng, Auteur ; B. Kronberg, Auteur ; J. Oldgren, Auteur ; A. Hansson, Auteur ; S. Sjöstrand, Auteur Année de publication : 2008 Article en page(s) : p. 366-372 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Surfactants Tags : Labile  surfactants  Cleavable  Car  washing  degreasing  Alkyl  ketene  dimer  Beta-keto Index. décimale : 668.1 Agents tensioactifs : savons, détergents Résumé : A new class of labile surfactants that break down at a controllable rate without the need for a change in pH will be presented. The invention has been patented by YKI Institute for Surface Chemistry, and is based on use of béta-keto acids or their salts as surface-active compounds. These surfactants spontaneously break down through decarboxylation, to form an oil-like ketone and CO2/HCO3–/CO32– depending on pH. The rate of breakdown can be controlled within a wide range by temperature or by certain additives, but, unlike most cleavable surfactants, a change in pH is not needed. Furthermore the surfactants can be conveniently activated from a stabile precursor just before use, and one (of many possible) precursors of this kind is already available on the industrial scale in the form of a well-known chemical that is FDA-approved in other, non-surfactant, applications. The compound in question, alkyl ketene dimer (AKD), is produced in large scale by a number of large chemical producers today, and used for hydrophobization of paper. The present article gives an overview of the surfactant chemistry, with focus on recent studies of the kinetics of activation of the surfactant precursor and breakdown kinetics of the labile surfactant at different conditions. Furthermore, possible industrial applications of the surfactant will be discussed, with one example taken from a recent feasibility Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3199 [article]

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Scientific results and economic effects from the centre for surfactants based on natural products (SNAP) / Mikael Kjellin in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 49, N° 3 (04-05/2012)

[article]  inTENSIDE, SURFACTANTS, DETERGENTS > Vol. 49, N° 3 (04-05/2012) . - p. 199-210 Titre : Scientific results and economic effects from the centre for surfactants based on natural products (SNAP) Type de document : texte imprimé Auteurs : Mikael Kjellin, Auteur Année de publication : 2012 Article en page(s) : p. 199-210 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Surfactants Tags : 'Tensio-actifs  naturels  base  sucre'  'Comportement  phase'  Adsorption  'Propriétés  tensioactives'  Applications Index. décimale : 668.1 Agents tensioactifs : savons, détergents Résumé : This review article will give a broad overview of the synthesized and characterised surfactants within the competence centre SNAP (Centre for Surfactants Based on Natural Products). The surfactants differ within their hydrophilic groups, hydrophobic groups as well as the linkage between these groups. The main focus was put on sugar-based surfactants and surfactants containing polyhydroxyl groups so this part will be the most extensive in the review. Interactions between surfactants and polymers have also been investigated and will be described in the final part of the review. SNAP resulted in the publication of 239 scientific articles and 22 PhD degrees. Note de contenu : - SUGAR-BASED SURFACTANTS AND SURFACTANTS CONTAINING POLYHYDROXYL GROUPS : Adsorption properties - Surface interaction forces between surfactant layers - Micellar properties, synergies - Sugar-based surfactants for solubilisation and delivery of drug molecules - Sugar-based amine surfactants - ALKYLAMIDE AND ALKYLESTER ETHOXYLATES : Adsorption - Surface interactionforces between surfactants layers - Cleavable surfactants - STEROL AND PHYTOSTEROL ETHOXYLATES - SURFACTANTS BASED ON FATTY ACIDS : Tail oil fatty acids - 12-hydroxystearic acid for pharmaceutical applications - Ascorbyl oleate surfactants - Dehydroabietic acid based surfactants - Fatty acids as friction modifiers in fuels - POLYMER-SURFACTANTS INTERACTIONS : Interaction with non-ionic polymers - Interaction with polyelectrolytes - Interactions with starch - TOPICAL FORMULATIONS, FUEL APPLICATIONS, APPLICATIONS, AND CHARACTERISATION OF LIPIDS - ECONOMIC EFFECTS OF SNAP Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=14899 [article]

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Surfactants from renewable resources / Mikael Kjellin / Chichester [United Kingdom] : John Wiley & Sons Ltd (2010)  

Titre : Surfactants from renewable resources Type de document : texte imprimé Auteurs : Mikael Kjellin, Editeur scientifique ; Ingegärd Johansson, Editeur scientifique Editeur : Chichester [United Kingdom] : John Wiley & Sons Ltd Année de publication : 2010 Collection : Wiley series in renewable resources Importance : XV-320 p. Présentation : ill. Format : 25 cm ISBN/ISSN/EAN : 978-0-470-76041-3 Prix : 108 E Note générale : Index - Bibliogr. Langues : Français (fre) Catégories : Ressources renouvelables Surfactants Index. décimale : 668.1 Agents tensioactifs : savons, détergents Note de contenu : I. RENEWABLE HYDROPHOBES : 1. Surfactants based on natural fatty acids 2. Nitrogen derivatives of natural fats and oils 3. Surface-active compounds as forest-industry by-products II. RENEWABLE HYDROPHILES : 4. Surfactants based on carbohydrates and proteins for consumer products and technical applications 5. Amino acids, lactic acid and ascorbic acid as raw materials for biocompatible surfactants III. NEW WAYS OF MAKING RENEWABLE BUILDING BLOCKS : 6. Ethylene from renewable resources 7. Fermentation-based building blocks for renewable resource-based surfactants IV. BIOSURFACTANTS : 8. Synthesis of surfactants using enzymes 9. Surfactants from waste biomass 10. Lecithin and other phospholipids 11. Sophorolipids and rhamnolipids 12. Saponin-based surfactants V. POLYMERIC SURFACTANTS/SURFACE-ACTIVE POLYMERS 13. Surface-active polymers from cellulose 14. New developments in the commercial utilization of lignosulfonates 15. Dispersion stabilizers based on inulin En ligne : http://books.google.com/books?id=GKWNVz7AjGIC&dq=%22BENEO+Remy%22&ie=ISO-8859-1& [...] Format de la ressource électronique : Web Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11781

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