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http://dx.doi.org/10.14478/ace.2020.1067

Emulsification of Natural Sunscreen with Green Tea Extract : Optimization Using CCD-RSM  

Lee, Seung Bum (Department of Chemical Engineering, Dankook University)
Zuo, Chengliang (Department of Chemical Engineering, Dankook University)
Xu, Yang (Department of Chemical Engineering, Dankook University)
Hong, In Kwon (Department of Chemical Engineering, Dankook University)
Publication Information
Applied Chemistry for Engineering / v.31, no.5, 2020 , pp. 532-538 More about this Journal
Abstract
In this study, emulsification process were conducted to manufacture the natural sunscreen from raw materials such as shea butter, olive emulsifier wax, and green tea extract. The emulsification was optimized by using the central composite design model-response surface methodology (CCD-RSM) where the response values were established as the mean droplet size (MDS) and emulsion stability index (ESI) after 7 days in addition to UV absorbance at 300nm. The amount of emulsifier and additives and emulsification time were established as operating variables and the optimal conditions of sunscreen emulsification were accepted as 3.70, 2.47 wt.%, and 15.42 min, respectively according to the result of CCD-RSM. On the other hand, the response values were estimated as 1173.80 nm and 99.56% for MDS and ESI, respectively, after 7 days, in addition to UV absorbance at 300 nm (2.47). The average error from actual experiments was a low level as about 3.0 ± 1.5%, which is mainly due to the fact that the optimization using CCD-RSM applied in this study was in the relatively high significant level.
Keywords
Natural sunscreen; Central composite design model; Emulsion stability; UV absorbance;
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