Journal of the Society of Cosmetic Scientists of Korea (대한화장품학회지)

Society of Cosmetic Scientists of Korea (대한화장품학회)
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Self-folding of Multi-layered and Compartmented Hydrogel Designed for 4D Mask Pack

다층 및 다중구획 하이드로젤 제조 및 4D 마스크팩 적용을 위한 자가접힘 특성 분석

  • Lim, Jun Woo (Dept. of Chemical Engineering, Soongsil University) ;
  • Jung, Naseul (Dept. of Chemical Engineering, Soongsil University) ;
  • Shin, Sung Gyu (Dept. of Chemical Engineering, Soongsil University) ;
  • Kwon, Hye Jin (Dept. of Chemical Engineering, Soongsil University) ;
  • Jeong, Jae Hyun (Dept. of Chemical Engineering, Soongsil University)
  • Received : 2018.09.03
  • Accepted : 2018.11.12
  • Published : 2018.12.30
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Abstract

The multi-layered and compartmented hydrogel was designed to examine the self-transforming for developing a 4D mask pack. The hydrogel consisting of two layers with different expansion ratios were fabricated to have specific curvature by self-folding assembly. In addition, the hydrogel compartmented with three different geometries was designed by varying of expansion ratios. The compartmented hydrogel with 0.03, 0. $0,03mm^{-1}$ of curvatures at room temperature was self-transformed with 1.33, 0, $1.33mm^{-1}$of curvatures at $37^{\circ}C$, enhancing the facial adhesion. Overall, this new strategy to prepare the multi-layered and compartmented hydrogel would be actively used in developing the 4D mask pack to self-transform by each facial curvature.

다층 및 다중구획 하이드로젤을 설계하여 4D 마스크팩 적용을 위한 자가접힘 특성분석을 수행하였다. 온도민감성 분자를 하이드로젤에 도입하여 팽창비가 다른 두 층으로 구성된 하이드로젤을 제조하였다. 나아가 팽창비 차이를 조절하여 자가접힘 정도가 다른 삼중구획 하이드로젤을 설계하였다. 상온에서 각각 0.03, 0, $0.03mm^{-1}$의 곡률을 갖는 구획화된 하이드로젤은 피부 온도에서 1.33, 0, $1.33mm^{-1}$의 곡률로 변화하여, 안면 밀착성이 현저히 높아지는 것을 확인하였다. 다층 및 다중구획 하이드로젤 제조 기술은 안면의 부위별 굴곡모양에 따라 자가변환이 가능한 맞춤형 4D 마스크팩 구현에 활용될 수 있다.

Keywords

HJPHBN_2018_v44n4_399_f0001.png 이미지

Figure 1. (A) Schematic description of a 4D mask pack integrated with multi-layered and compartmented hydrogel. (B) Preparation flow diagram of multi-layered and compartmented hydrogel by photolithography technique. (C) Self-folding assembly of a hydrogel depending on the temperature.

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Figure 2. Effects of AAm and NIPAM concentration on the expansion ratio of the hydrogel.

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Figure 3. Effects of AAm and MBA concentration on the expansion ratio of the hydrogel.

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Figure 4. (A) Curvatures of the multi-layered hydrogels estimated by a mathematical model developed for the curvature of a heat-induced bimetallic strip. (B, C) a self-folded hydrogel with different curvatures depending on the temperature (B, C). (D) hysteresis curve of curvatures in each compartmented hydrogel (wing and base).

HJPHBN_2018_v44n4_399_f0005.png 이미지

Figure 5. Enhancing the facial adhesion of the hydrogel mask introduced to the skin temperature by self-transformation.

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