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http://dx.doi.org/10.15230/SCSK.2014.40.2.141

A Study of the Stability and Moisturizing Effect of Non-Animal Cholesteric Liquid Crystal  

Woo, Byoung Young (Amorepacific Corporation R&D Center)
Min, Dae Jin (Amorepacific Corporation R&D Center)
Baek, Heung Soo (Amorepacific Corporation R&D Center)
Kim, Shin Hyoung (Amorepacific Corporation R&D Center)
Hwang, Joon Young (Amorepacific Corporation R&D Center)
Park, Young Ho (Amorepacific Corporation R&D Center)
Lee, John Hwan (Amorepacific Corporation R&D Center)
Shin, Song Seok (Amorepacific Corporation R&D Center)
Publication Information
Journal of the Society of Cosmetic Scientists of Korea / v.40, no.2, 2014 , pp. 141-153 More about this Journal
Abstract
This study is about the development of cholesteric liquid crystals (CLCs), which are highly applicable to cosmetics formulation. The CLCs made from non-animal origin were chosen not only because they are free of animal viruses but also because they give a sense of security to the cosmetic consumers. Three kinds of new cholesteric derivatives (CI, CC, CN) were synthesized using non-animal cholesterol [NAB cholesterol (ARCH LONZA)], which was originally made by fermentation process. To develop high applicability to cosmetics formulation, we attempted to find out the optimum compositions in which CLCs can maintain their color over a wide range of temperature. The CLCs in 41 different compositions were prepared by the combinations of three cholesteric derivatives and a visual evaluation method was employed to determine the range of temperature at which the CLCs display their color. The 205 UV-VIS spectral data obtained from 41 CLCs at various temperatures were simultaneously analyzed to investigate the critical factors affecting the characteristics of the CLCs. Results showed that A4, A5, A6 and A7 were the best compositions to cosmetics formulation. A6 composition had a great moisturizing effect by the artificial skin test ($AmoReSkin^{TM}$).
Keywords
Cholesteric liquid crystal; Cholesteryl isostearate; Cholesteryl nonanoate; Cholesteryl chloride; moisturizer;
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