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Influence of sodium dodecyl sulfate presence on esterification of propylene glycol with lauric acid / Halina Szelag in Industrial & engineering chemistry research, Vol. 48 N° 18 (Septembre 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N° 18 (Septembre 2009) . - pp. 8313–8319 Titre : Influence of sodium dodecyl sulfate presence on esterification of propylene glycol with lauric acid Type de document : texte imprimé Auteurs : Halina Szelag, Auteur ; Elwira Sadecka, Auteur Année de publication : 2010 Article en page(s) : pp. 8313–8319 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Sodium  dodecyl  sulfate  Esterification  Propylene  glycol  Lauric  acid Résumé : In this study, the influence of sodium dodecyl sulfate (SDS) on the direct esterification of 1,2-propanediol (propylene glycol, PG) with dodecanoic acid (lauric acid, LA) was investigated. It was stated that formation of a mixed interfacial film of the anionic surfactant and synthesized monoacylpropyleneglycol (PGML) emulsifier lowers the interfacial tension between phases to produce a transparent microemulsion. Therefore, SDS was found to be effective in increasing the contact between reagents and, as a consequence, accelerating the reaction progress. The obtained products were liquid and transparent substances at room temperature. The particle size distribution of the formed microemulsion systems range from about 25−45 nm, depending on the concentration of surfactant in the reaction mixture. The hydrophilic−lipophilic properties of synthesized products were also studied. The concentration of SDS in the reaction mixture influenced the hydrophile−lipophile balance (HLB) values of the obtained emulsifiers. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie8019449 [article] Influence of sodium dodecyl sulfate presence on esterification of propylene glycol with lauric acid [texte imprimé] / Halina Szelag, Auteur ; Elwira Sadecka, Auteur . - 2010 . - pp. 8313–8319. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 18 (Septembre 2009) . - pp. 8313–8319 Mots-clés : Sodium  dodecyl  sulfate  Esterification  Propylene  glycol  Lauric  acid Résumé : In this study, the influence of sodium dodecyl sulfate (SDS) on the direct esterification of 1,2-propanediol (propylene glycol, PG) with dodecanoic acid (lauric acid, LA) was investigated. It was stated that formation of a mixed interfacial film of the anionic surfactant and synthesized monoacylpropyleneglycol (PGML) emulsifier lowers the interfacial tension between phases to produce a transparent microemulsion. Therefore, SDS was found to be effective in increasing the contact between reagents and, as a consequence, accelerating the reaction progress. The obtained products were liquid and transparent substances at room temperature. The particle size distribution of the formed microemulsion systems range from about 25−45 nm, depending on the concentration of surfactant in the reaction mixture. The hydrophilic−lipophilic properties of synthesized products were also studied. The concentration of SDS in the reaction mixture influenced the hydrophile−lipophile balance (HLB) values of the obtained emulsifiers. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie8019449