Formation and characterization of microemulsions containing polymeric silicone.
We have prepared microemulsions consisting of water/[40 wt % polyoxyethylene (20 mol) glycerin isostearate (abbreviated as POE-GIS) + 60 wt % random copolymer of polyoxyethylene (POE, 38 mol)/polyoxypropylene (POP, 10 mol) pentaerythritol tetramethyl ether {abbreviated as PEPTME (38/10)}]/[polyoxyethylene (POE, 19 mol)/polyoxypropylene (POP, 19 mol) polydimethylsiloxane copolymer (abbreviated as POE/POP-PDMS)] and water/[40 wt % POE-GIS + 60 wt % PEPTME (38/10)]/[95 wt % POE/POP-PDMS + 5 wt % oleic acid (abbreviated as OA)] systems and characterized them with optical observation, rheometry, and freeze-fracture transmission electron microscopy (FF-TEM) images. Bicontinuous and droplet-type O/W (oil-in-water) microemulsions are formed depending on the volume fraction of water. The bicontinuous structure observed in the oil-rich region, upon successive dilution with water, is transformed into a droplet-type microemulsion without phase separation. The prepared droplet-type microemulsion containing polymeric silicone and random copolymer PEPTME (38/10) as a cosurfactant in the water-rich region has potential applications in cosmetics.
Sharma
Suraj Chandra
SC
Department of Pure and Applied Chemistry, Faculty of Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan.
Tsuchiya
Koji
K
Sakai
Kenichi
K
Sakai
Hideki
H
Abe
Masahiko
M
Komura
Shigeyuki
S
Sakamoto
Kazutami
K
Miyahara
Reiji
R