Moisture retention of glycerin solutions with various concentrations: a comparative study.

Autor: Chen HJ; Department of Food Science and Biotechnology, National Chung Hsing University, No. 145, Xingda Rd., South Dist., Taichung City, 402204, Taiwan, ROC.; Healthmate Co., Ltd., No. 14, Pinghe 1st St., Changhua City, 500016, Taiwan, ROC., Lee PY; Department of Optoelectronics and Materials Technology, National Taiwan Ocean University, No. 2, Beining Rd., Zhongzheng Dist., Keelung City, 202301, Taiwan, ROC., Chen CY; Ph.D. Program in Materials and Chemical Engineering, National United University, No. 2, Lienda Rd., Miaoli City, 360302, Taiwan, ROC., Huang SL; Ph.D. Program in Materials and Chemical Engineering, National United University, No. 2, Lienda Rd., Miaoli City, 360302, Taiwan, ROC.; Department of Chemical Engineering, National United University, No. 2, Lienda Rd., Miaoli City, 360302, Taiwan, ROC., Huang BW; Department of Chemical Engineering, National United University, No. 2, Lienda Rd., Miaoli City, 360302, Taiwan, ROC., Dai FJ; Department of Food Science and Biotechnology, National Chung Hsing University, No. 145, Xingda Rd., South Dist., Taichung City, 402204, Taiwan, ROC.; Healthmate Co., Ltd., No. 14, Pinghe 1st St., Changhua City, 500016, Taiwan, ROC., Chau CF; Department of Food Science and Biotechnology, National Chung Hsing University, No. 145, Xingda Rd., South Dist., Taichung City, 402204, Taiwan, ROC., Chen CS; Department of Food Science and Biotechnology, National Chung Hsing University, No. 145, Xingda Rd., South Dist., Taichung City, 402204, Taiwan, ROC., Lin YS; Ph.D. Program in Materials and Chemical Engineering, National United University, No. 2, Lienda Rd., Miaoli City, 360302, Taiwan, ROC. linys@nuu.edu.tw.; Department of Chemical Engineering, National United University, No. 2, Lienda Rd., Miaoli City, 360302, Taiwan, ROC. linys@nuu.edu.tw.; Institute of Food Safety and Health Risk Assessment, National Yang Ming Chiao Tung University, No. 155, Sec. 2, Linong St. Beitou Dist., Taipei City, 112304, Taiwan, ROC. linys@nuu.edu.tw.
Jazyk: angličtina
Zdroj: Scientific reports [Sci Rep] 2022 Jun 17; Vol. 12 (1), pp. 10232. Date of Electronic Publication: 2022 Jun 17.
DOI: 10.1038/s41598-022-13452-2
Abstrakt: Various methods of evaluating a humectant's moisture retention have unique mechanisms. Hence, for designing advanced or efficient ingredients of cosmetic products, a clear understanding of differences among methods is required. The aim of this study was to analyze the moisture-retention capacity of glycerin, a common ingredient in cosmetic products. Specifically, this study applied gravimetric analysis, transepidermal water loss (TEWL) analysis, and differential scanning calorimetry (DSC) to examine the evaporation of glycerin solutions of different concentrations. The results revealed that the moisture-retention capacity of glycerin increased with the glycerin concentration from 0 to 60 wt%, and glycerin at concentration of 60-70 wt% did not exhibit weight change during the evaporation process. When the glycerin concentration exceeded 70 wt%, moisture sorption occurred in the glycerin solution. Furthermore, the results revealed a deviation between the evaporation rates measured using gravimetric analysis and those measured using TEWL analysis. However, normalizing the results of these analyses yielded the relative evaporation rates to water, which were consistent between these two analyses. DSC thermograms further confirmed the consistent results and identified two hydrated water microstructures (nonfreezable water and free water) in the glycerin solutions, which explained why the measured evaporation rate decreased with the glycerin concentration. These findings can be applied to prove the moisture-retention capacity of a humectant in cosmetic products by different measuring methods.
(© 2022. The Author(s).)
Databáze: MEDLINE
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