한국응용과학기술학회지 (Journal of the Korean Applied Science and Technology)

  • 제35권4호
  • /
  • Pages.1478-1486
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  • 2018
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  • 1225-9098(pISSN)
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  • 2288-1069(eISSN)
한국응용과학기술학회 (The Korean Society of Applied Science and Technology)
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The Formulation of Semi-Transparent Gel Emulsion by the Liquid Crystal Emulsification Method

  • Kim, Jungil (Elite cosmetic Academy) ;
  • Lee, Youngkeun (Dept. Cosmetic Science, Daejeon Health Institute of Science) ;
  • Kim, Yongmin (Dept. Cosmetics & Beauty, Semyung University) ;
  • Yun, Seiyoung (Dept. Cosmetic Science, Daejeon Health Institute of Science)
  • 투고 : 2018.11.30
  • 심사 : 2018.12.22
  • 발행 : 2018.12.31
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초록

Liquid crystals offer plenty of useful activities as improving the stability of emulsion, increasing moisturizing power, drug release, improving skin feeling and visual effect for cosmetics fields. In order to prepare stable semi-transparent gel emulsion, liquid crystal emulsification method was used. The emulsion stabilities of systems containing glycerin, fatty alcohols, surfactants, water and oil were investigated at various temperatures as time passed. The stabilities of all emulsions were evaluated by means of a polarizing microscope, SEM, rheometer, colorimeter and DSC. Even though the samples stored at $50^{\circ}C$ thermostatic chamber were occurred the reduction of hardness, turbidity and ${\Delta}H$ and the peak shift, the semi-transparent gel emulsion was very stable without separation between water and oils phase in emulsion.

키워드

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Fig. 1. Schematic presentation of secondary droplets

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Scheme I. Sample preparation of A1, A2, A3 and B.

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Fig. 2. The region of liquid crystal against water content and fatty alcohols wt% fraction concentration with samples of A1( · · · · · ), A2(- - ) and A3(-).

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Fig. 3. Photographs obtained with sample of B after storage at 25℃ for 3 days. (a) without polarized light (b) under polarized light. Magnification×400.

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Fig. 4. Cryogenic scanning electron micrographs obtained by freezing, fracturing and coating the sample of B. (a) Magnification×3,000 (b) Magnification×5,000.

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Fig. 5. Photographs obtained under polarized light with sample of B after storage at 25℃(a), -15℃(b), 0℃(c), 40℃(d) and 50℃(e) for stated times. Magnification×400.

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Fig. 6. Hardness changes of B sample during storage at 25℃(◇), -15℃(□), 0℃(○), 40℃(△) and 50℃(Ⅹ).

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Fig. 7. A cell device for measuring turbidity by self-made.

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Fig. 8. Turbidity change of B sample as Temperature(Thickness 0.3mm).

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Fig. 9. Turbidity of B sample after storage at -15℃(◆), 0℃(■), 25℃(▲), 40℃(●) and 50℃( ) for a month.

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Fig. 10. DSC thermal profiles of sample B after storage at 25℃, -15℃, 0℃, 40℃ and 50℃ for stated times. Heating rate 1℃ /min.

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Fig. 11. Photographs of semi-transparent gel emulsion by the liquid crystal emulsification method.

Table 1. The compositions of sample A1 to A3

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Table 2. The composition of sample B

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참고문헌

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