Title:Lipase Catalyzed Synthesis of D-xylose-based Biosurfactants and their Surface
Properties
Volume: 27
Issue: 15
Author(s): Fatma Loulou*Chahra Bidjou-Haiour
Affiliation:
- LOMOP, Organic Synthesis and Modeling Group, Department of Chemistry, Faculty of Sciences, Badji-Mokhtar University, BP 12
El-Hadjar, Annaba 23000, Algeria
Keywords:
Lipase, 1-O-acyl xylose esters, fatty acid, bio-surfactants, surface properties, enzymatic esterification.
Abstract: Synthesis of a homologous series of 1-O-acyl xylose esters with long and very long
acyl chains derived from fatty acids was performed via enzymatic esterification in one step using
Candida antarctica lipase B. The effect of fatty acid chain length on the activity of the lipase
was evaluated. Subsequently, the surface properties of the obtained products have been determined
such as hydrophilic-lipophilic balance, critical micellar concentration, and surfactant
packing parameter. Foaming and emulsifying ability were also measured. The highest conversion
was obtained by using docosanoic acid as an acylant agent (67.50%). The surface tension
values are between 25 mN.m-1 for 1-O-octadecanoyl-D-xylopyranose and 47,17 mN.m-1 for
1-O-docosanoyl-D-xylopyranose. The emulsifying abilities of all esters exceeded 80%. It was
found that the surface properties of the surfactants are greatly affected by the fatty acid chain length. The surface
parameters results revealed that the prepared compounds have a good surface activity. Additionally, these
bio-surfactants display good emulsifying ability.