ORBi: Razafindralambo Hary - Impacts of the carbonyl group location of ester bond on interfacial properties of sugar-based surfactants: experimental and computational evidences

Reference : Impacts of the carbonyl group location of ester bond on interfacial properties of sugar-...


	Document type :	Scientific journals : Article
	Discipline(s) :	Physical, chemical, mathematical & earth Sciences : Multidisciplinary, general & others
	To cite this reference:	http://hdl.handle.net/2268/81797

Title :	Impacts of the carbonyl group location of ester bond on interfacial properties of sugar-based surfactants: experimental and computational evidences
Language :	English
Author, co-author :	Razafindralambo, Hary [Université de Liège - ULg > Chimie et bio-industries > Chimie biologique industrielle >]
	Blecker, Christophe [Université de Liège - ULg > Chimie et bio-industries > Technologie des industries agro-alimentaires >]
	Mezdour, Samir [> > > >]
	Deroanne, Claude [Université de Liège - ULg > Gembloux Agro-Bio Tech > Gembloux Agro-Bio Tech >]
	Crowet, Jean-Marc [Université de Liège - ULg > Chimie et bio-industries > Centre de Bio. Fond. - Section de Biologie moléc. et numér. >]
	Brasseur, Robert [Université de Liège - ULg > Chimie et bio-industries > Centre de Bio. Fond. - Section de Biologie moléc. et numér. >]
	Lins, Laurence [Université de Liège - ULg > Chimie et bio-industries > Centre de Bio. Fond. - Section de Biologie moléc. et numér. >]
	Paquot, Michel [Université de Liège - ULg > Chimie et bio-industries > Chimie biologique industrielle >]
Publication date :	2009
Journal title :	Journal of Physical Chemistry B
Publisher :	American Chemical Society
Volume :	113
Pages :	8872–8877
Audience :	International
ISSN :	1520-6106
e-ISSN :	1520-5207
City :	Washington
Country :	DC
Keywords :	[en] Interfacial properties; dynamic surface tension; rheology properties; Carbohydrate-based surfactants
Abstract :	[en] Interfacial properties of surfactants are dependent on the conformation adopted by the hydrophilic headgroup or/and the hydrophobic tail at the boundary limit of two immiscible phases. Here, we demonstrate the impacts of the carbonyl group (-CO-) location of the ester bond of sugar-based surfactants by comparing some properties of two closely related esters, octyl glucuronate and glucose octanoate, at the air-water interface. The carbonyl group location influences the rate and extent of interfacial adsorption and the rheology properties of sugar esters at the air-water interface, which were evaluated by dynamic surface tension and complex surface viscoelastic measurements. Octyl glucuronate adsorbs the fastest at the air-water interface whereas glucose octanoate reduces the dynamic surface tension at the lowest value and exhibits the highest film viscoelasticity. Differences are attributed to molecular conformation constraints inducing relevant changes to the surface coverage kinetic capacity and the interaction strengths of the octyl sugar ester adsorbed films at the air-water interface. All of the results are supported by the minimum cross-sectional area values per molecule determined by both experimental and computational approaches.
Target :	Researchers ; Professionals ; Students ; General public ; Others
Permalink :	http://hdl.handle.net/2268/81797
	also: http://hdl.handle.net/2268/22474 ; http://hdl.handle.net/2268/74238
DOI :	10.1021/jp903187f

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