Formation of W/O microemulsion based on natural glycolipid biosurfactant, mannosylerythritol lipid-a.
Mannosylerythritol lipid-A (MEL-A) is a glycolipid biosurfactant abundantly produced from soybean oil by microorganisms at a yield of up to 100 g/L. In this study, the formation of water-in-oil (W/O) microemulsion based on the single component of MEL-A was confirmed using dynamic light scattering (DLS) and freeze fracture electron microscopy (FF-EM). DLS and FF-EM measurements revealed that the diameter of the microemulsion increases with an increase in water-to-surfactant mole ratio (W(0)) ranging from 20 to 60 nm, and the maximum W(0) value was found to be 20, which is as high as that of soybean lecithin. Glycolipid biosurfactant has a great potential for the formation of W/O microemulsion without using any cosurfactants.
Worakitkanchanakul
Wannasiri
W
Faculty of Science and Technology, Tokyo University of Science, Noda, Chiba, Japan.
Imura
Tomohiro
T
Morita
Tomotake
T
Fukuoka
Tokuma
T
Sakai
Hideki
H
Abe
Masahiko
M
Rujiravanit
Ratana
R
Chavadej
Sumaeth
S
Kitamoto
Dai
D
D020285:Cryoelectron Microscopy; D004655:Emulsions; D006017:Glycolipids / Q000737:chemistry*; D008050:Lipid A / Q000737:chemistry*; D013024:Soybean Oil / Q000737:chemistry*; D013501:Surface-Active Agents / Q000737:chemistry*; D014867:Water / Q000737:chemistry
D004655:Emulsions; D006017:Glycolipids; D008050:Lipid A; D013501:Surface-Active Agents; C439671:mannosylerythritol lipid; D014867:Water; D013024:Soybean Oil