TITLE:
Study on the Formation and Properties of Liquid Crystal Emulsion in Cosmetic
AUTHORS:
Wanping Zhang, Lingyan Liu
KEYWORDS:
Liquid Crystal Emulsion; Rheology; Stability; Moisture
JOURNAL NAME:
Journal of Cosmetics, Dermatological Sciences and Applications,
Vol.3 No.2,
June
13,
2013
ABSTRACT: In this paper, the formation of liquid
crystal structure in preparation of emulsion and the change of those liquid crystal
structures during storage
and usage were studied. Besides, the rheological and moisturizing property of the
liquid crystal
structure emulsion was investigated as well. The results show that the liquid
crystal structure at oil-water interface in the emulsion forms gradually with
cooling process after homogenization. The liquid crystal structure doesn’t change significantly during the
storage within 12 months. And after emulsion being stored for 18 months, the
crystal structure starts to decompose. Upon application on the skin, the liquid
crystal structure of emulsion was found to transform into other form with
rubbing, although the liquid crystal structure still remains. The rheological
data shows that liquid crystal emulsion exhibits solid-like (elastic) property during storage, which
is favorable for good stability. On the other hand, liquid crystal emulsion
shows typical shear-thinning property upon usage, which leads to an excellent
skin sensory feeling. And the improved moisturizing properties of such emulsion
may be attributed to the liquid crystal structure.