Reference : Alkylbetainate chlorides: Synthesis and behavior of monolayers at the air-water interface
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Chemistry
http://hdl.handle.net/2268/103950
Alkylbetainate chlorides: Synthesis and behavior of monolayers at the air-water interface
English
Nsimba Zakanda, Francis [Université de Liège - ULg > > > Doct. sc. agro. & ingé. biol.]
Laurent, Pascal mailto [Université de Liège - ULg > Chimie et bio-industries > Chimie biologique industrielle >]
Paquot, Michel mailto [Université de Liège - ULg > Chimie et bio-industries > Chimie biologique industrielle >]
Mvumbi, L. G. [> >]
Deleu, Magali mailto [Université de Liège - ULg > Chimie et bio-industries > Chimie biologique industrielle >]
2011
Thin Solid Films
Elsevier Science
520
344-350
Yes (verified by ORBi)
International
0040-6090
[en] Glycine betaine based ester ; Cationic monolayer ; Compression isotherm ; Compressibility modulus
[en] In this study, cationic alkylbetainate chloride surfactants (CnBC, n = 10–16) are synthesized using more environment-friendly reagents (glycine betaine, thionyl chloride and primary alcohols) than in previous works (chloroacetyl chloride, trimethylamine and primary alcohols). The interfacial behavior of the CnBC monolayers is studied onto aqueous subphases at 20 °C using the Langmuir through technique. Different experimental conditions including pH, temperature, sodium salts and Na2SO4 ionic strength are investigated. The results obtained have shown that the CnBC with a hydrocarbon chain length ≥ 14 are able to form insoluble monolayers. The C16BC monolayer stability checked by the compression–expansion cycles has shown a superimposition of isotherms in the whole liquid-condensed region and an irreversible rearrangement of the molecules at high compression. The C16BC monolayer is not influenced by the pH and the presence of monovalent anions but it is influenced by the temperature, the divalent anions and the ionic strength. It has exhibited a great stability whatever the experimental conditions.
Fonds de la Recherche Scientifique (Communauté française de Belgique) - F.R.S.-FNRS
Researchers ; Professionals ; Students ; General public ; Others
http://hdl.handle.net/2268/103950
10.1016/j.tsf.2011.07.005

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