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Ultraviolet light screen using cholesteric liquid crystal capsules on the basis of selective reflectionopen access
- Authors
- Oh, Heemuk; Kikuchi, Hirotugu; Lee, Ji Hyun; Kim, Su Ji; Lee, Jun Bae; Cho, Moon Sun; Lee, Min Young; Okumura, Yasushi; Hong, Joo-Hee; Hong, Sung-Kyu
- Issue Date
- 3-Aug-2021
- Publisher
- ROYAL SOC CHEMISTRY
- Citation
- RSC ADVANCES, v.11, no.41, pp 25471 - 25476
- Pages
- 6
- Indexed
- SCIE
SCOPUS
- Journal Title
- RSC ADVANCES
- Volume
- 11
- Number
- 41
- Start Page
- 25471
- End Page
- 25476
- ISSN
- 2046-2069
2046-2069
- Abstract
- Sunscreen can protect human skin from sunlight by decreasing exposure to ultraviolet (UV) light, specifically UV-B and UV-A. In this study, a new type of UV screen system is proposed using cholesteric liquid crystal (CLC) capable of selectively reflecting UV-A within the human skin temperature range of 32-36 degrees C. Polycaprolactone (PCL) capsules with CLC mixture which had a helical chiral pitch corresponding to the wavelength of UV light were made by a solvent evaporation method. The average diameter of the capsules was about 34 mu m. Consequently, it was confirmed that the CLC mixture (COC : CN = 80 : 20) could reflect UV-A light over 350-380 nm within the human skin temperature range. Also, it was confirmed that the CLC/PCL microcapsules could block UV light over 290-400 nm by about 6%.
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Related Researcher
- Hong, Sung Kyu
- College of Engineering (Department of Chemical and Biochemical Engineering)