Premium
Formulating Alcohol‐Free Microemulsions Using Rhamnolipid Biosurfactant and Rhamnolipid Mixtures
Author(s) -
Nguyen Thu T.,
Sabatini David A.
Publication year - 2009
Publication title -
journal of surfactants and detergents
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.349
H-Index - 48
eISSN - 1558-9293
pISSN - 1097-3958
DOI - 10.1007/s11743-008-1098-y
Subject(s) - microemulsion , rhamnolipid , chemistry , pulmonary surfactant , alcohol , limonene , chromatography , organic chemistry , sodium , essential oil , biochemistry , biology , bacteria , pseudomonas aeruginosa , genetics
This research focused on developing alcohol‐free biosurfactant‐based microemulsions. Rhamnolipid‐based mixtures were found to have double the solubilization parameter as compared to sodium bis(2‐ethyl) dihexyl sulfosuccinate/sodium dihexyl sulfosuccinate/sodium mono‐ and dimethyl naphthalene sulfonate at the same total molar concentration. For the first time, a phase diagram was developed for surfactant mixtures containing soy methyl ester ethoxylate, rhamnolipid and oleyl alcohol with limonene oil. This phase diagram can be used as a guideline for selecting a surfactant system and surfactant ratio to formulate microemulsions with a given oil. In addition, the alcohol‐free biosurfactant‐based microemulsions required reasonable salinity values for limonene, making it viable in a variety of applications.