Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
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Natural Dispersing Agent from Korean Seaweed Extract to Enhance the Safeness and UV Protection Properties of Inorganic Sunscreen Based on TiO2 Nanoparticles

  • Pestaria Sinaga (Department of Mechatronics Engineering Kyungnam University) ;
  • Sung-Hwan Bae (Materials Science and Engineering, Kyungnam University)
  • Received : 2023.07.14
  • Accepted : 2024.02.13
  • Published : 2024.02.27
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Abstract

Nanoparticles are commonly used to avoid the opaque white color of TiO2 based sunscreen. However, a dispersing agent is typically required because of the tendency of the nanoparticles (NPs) to agglomerate. Stearic acid is one kind of dispersing agent often used for sunscreen products. However, according to the MSDS data sheet on stearic acid, stearic acid is highly hazardous to aquatic life and causes irritation on human skin. To avoid this problem, in this study a safer organic dispersing agent extracted from Korean seaweed has been studied to disperse TiO2 nanoparticles, and further use as an active agent in sunscreen products. The presence of phytochemicals in seaweed extract, especially alginate, can disperse TiO2 nanoparticles and improve TiO2 dispersion properties. Results show that seaweed extract can improve the dispersion properties of TiO2 nanoparticles and sunscreen products. Reducing the agglomeration of TiO2 nanoparticles improves sunscreen properties, by making it less opaque white in color, and increasing UV protection value. It was also confirmed that adding seaweed extract into sunscreen products had no irritating effects on the human skin, making it more desirable for cosmetics application.

Keywords

Acknowledgement

This work was supported by the Technology Innovation Program (Development of 30 ㎛ ceramic beads and reliability evaluation technology, No. 20011008) funded by the Ministry of Trade, Industry & Energy (MOTIE, Korea).

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