Synthesis and properties of amino acid glucose ester dimeric surfactants

ABSTRACT

Two series of lysine glucose ester AOT surfactants and glutamic acid glucose ester Bola surfactants were synthesized, using L-lysine, L-glutamic acid, and α-D-methylglucoside as raw materials. The structures of glucose esters were confirmed by ¹H NMR and ESI-MS. Some surface activities were studied, such as cmc, γ_cmc, C₂₀, Γ_max, and A_min. The results showed that cmc decreased, but γ_cmc increased with the lengthening of hydrophobic chain. The thermodynamic parameters of micellization () indicated that the micellization processes of glucose esters were spontaneous and exothermic, driven by entropy.

GRAPHICAL ABSTRACT

KEYWORDS:

• Gucose ester
• micellization
• surfactivity
• thermodynamic parameters